| 1. |
- Belitsky, Victor, 1955, et al.
(författare)
-
A new 3 mm band receiver for the Onsala 20 m antenna
- 2015
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 580
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Tidskriftsartikel (refereegranskat)abstract
- A new receiver for the Onsala 20 m antenna with the possibility of being equipped with 3 mm and 4 mm bands has been built and the 3 mm channel has been commissioned during the Spring 2014. For single-dish operation, the receiver uses an innovative on-source/off-source optical switch. In combination with additional optical components and within the same optical layout, the switch provides two calibration loads (for the 3 mm and 4 mm channels), sideband rejection measurement, and tuning possibilities. The optical layout of the receiver employs all cold (4 K) offset elliptical mirrors for both channels, whereas the on-off switch employs flat mirrors only. The 3 mm channel employs a sideband separation (2SB) dual polarization receiver with orthomode transducer (OMT), 4-8 GHz intermediate frequency (IF), x? 2pol x? upper and lower sidebands (USB? +? LSB). The cryostat has four optical windows made of high density polyethylene (HDPE) with anti-reflection corrugations, two for the signal and two for each frequency band cold load. The cryostat uses a two-stage cryocooler produced by Sumitomo HI? RDK? 408D2 with anti-vibration suspension of the cold-head to minimize impact of the vibrations on the receiver stability. The local oscillator (LO) system is based on a Gunn oscillator with aphase lock loop (PLL) and four mechanical tuners for broadband operation, providing independently tunable LO power for each polarization. This paper provides a technical description of the receiver and its technology and could be useful for instrumentation engineers and observers using the Onsala 20 m telescope.
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| 2. |
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| 3. |
- Belitsky, Victor, 1955, et al.
(författare)
-
ALMA Band 2 Cold Cartridge Assembly Design
- 2022
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Ingår i: 32nd International Symposium of Space Terahertz Technology, ISSTT 2022.
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Konferensbidrag (refereegranskat)abstract
- As part of the ALMA development, we present the design of the ALMA Band 2 Cold Cartridge Assembly (CCA). The Band 2 is the last band that completes the suit of the 10 receiver channels of ALMA. The originally planned ALMA Band 2 receiver cartridge should cover the RF band of 67 - -90 GHz. The recent progress in technology, optics, OMT design and mm-wave amplifiers, however allowed to implement receiver that has an extended RF band up to 116 GHz. Furthermore, the Band 2 receiver pursues 2SB layout and provides 4-18 GHz IF band for two sidebands in a dual-polarization configuration. Here, we describe the design of the Band 2 CCA that includes optics, amplifier assembly, internal RF transport, mechanics and cryogenics. The downconverter part and performances are described elsewhere.
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| 4. |
- Belitsky, Victor, 1955, et al.
(författare)
-
ALMA Band 5 receiver cartridge: Design, performance, and commissioning
- 2018
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 611
-
Tidskriftsartikel (refereegranskat)abstract
- We describe the design, performance, and commissioning results for the new ALMA Band 5 receiver channel, 163-211 GHz, which is in the final stage of full deployment and expected to be available for observations in 2018. This manuscript provides the description of the new ALMA Band 5 receiver cartridge and serves as a reference for observers using the ALMA Band 5 receiver for observations. At the time of writing this paper, the ALMA Band 5 Production Consortium consisting of NOVA Instrumentation group, based in Groningen, NL, and GARD in Sweden have produced and delivered to ALMA Observatory over 60 receiver cartridges. All 60 cartridges fulfil the new more stringent specifications for Band 5 and demonstrate excellent noise temperatures, typically below 45 K single sideband (SSB) at 4 K detector physical temperature and below 35 K SSB at 3.5 K (typical for operation at the ALMA Frontend), providing the average sideband rejection better than 15 dB, and the integrated cross-polarization level better than -25 dB. The 70 warm cartridge assemblies, hosting Band 5 local oscillator and DC bias electronics, have been produced and delivered to ALMA by NRAO. The commissioning results confirm the excellent performance of the receivers.
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| 5. |
- Belitsky, Victor, 1955, et al.
(författare)
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Design and performance of ALMA band 5 receiver cartridge
- 2010
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Ingår i: 35th International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010. - 9781424466559 ; , s. 1-2
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Konferensbidrag (refereegranskat)abstract
- ALMA, Atacama Large Millimetre Array, covers the frequency band from 30 GHz to 960 GHz in ten separate frequency bands. We present here the design and performance of the ALMA Band 5 receiver cartridge that covers 163–211 GHz. The Band 5 receiver shows the state-of-the-art performance with the noise temperature below 65K (SSB) and sideband rejection above 12 dB over 80% of the RF band.
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| 6. |
- Belitsky, Victor, 1955, et al.
(författare)
-
Facility Heterodyne Receiver for the Atacama Pathfinder Experiment Telescope
- 2007
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Ingår i: Proceedings of Joint 32nd International Conference on Infrared Millimeter Waves and 15th International conference on Terahertz Electronics, Sept 3-7, 2007, City Hall, Cardiff, Wales, UK. ; , s. 326-328
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Konferensbidrag (refereegranskat)
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| 7. |
- Belitsky, Victor, 1955, et al.
(författare)
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Prototype ALMA Band 5 Cartridge:Design and Performance
- 2009
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Ingår i: Proceedings of the 20TH INTERNATIONAL SYMPOSIUM ON SPACE TERAHERTZ TECHNOLOGY, Charlottesville, VA, USA, April 20-22, 2009, s. 2-5.
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Konferensbidrag (refereegranskat)abstract
- The Atacama Large Millimeter/submillimeterArray (ALMA), an international astronomy facility, is apartnership of East Asia, Europe and North America incooperation with the Republic of Chile and aims to build aninterferometer radio telescope consisting of more than 60antennas. The instrument is under construction at the Llano deChajnantor, about 50 km east of San Pedro de Atacama, Chile.This work presents a part of ALMA frontend, the development,design and performance of one of the frequency channels of theALMA receiver, the Band 5 prototype cartridge for 163 – 211GHz frequency band.
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| 8. |
- Belitsky, Victor, 1955, et al.
(författare)
-
SEPIA - A new single pixel receiver at the APEX telescope
- 2018
-
Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 612
-
Tidskriftsartikel (refereegranskat)abstract
- Context. We describe the new Swedish-ESO PI Instrument for APEX (SEPIA) receiver, which was designed and built by the Group for Advanced Receiver Development (GARD), at Onsala Space Observatory (OSO) in collaboration with ESO. It was installed and commissioned at the APEX telescope during 2015 with an ALMA Band 5 receiver channel and updated with a new frequency channel (ALMA Band 9) in February 2016. Aim. This manuscript aims to provide, for observers who use the SEPIA receiver, a reference in terms of the hardware description, optics and performance as well as the commissioning results. Methods. Out of three available receiver cartridge positions in SEPIA, the two current frequency channels, corresponding to ALMA Band 5, the RF band 158-211 GHz, and Band 9, the RF band 600-722 GHz, provide state-of-the-art dual polarization receivers. The Band 5 frequency channel uses 2SB SIS mixers with an average SSB noise temperature around 45 K with IF (intermediate frequency) band 4-8 GHz for each sideband providing total 4 × 4 GHz IF band. The Band 9 frequency channel uses DSB SIS mixers with a noise temperature of 75-125 K with IF band 4-12 GHz for each polarization. Results. Both current SEPIA receiver channels are available to all APEX observers.
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| 9. |
- Belitsky, Victor, 1955, et al.
(författare)
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Terahertz Instrumentation For Radio Astronomy
- 2009
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Ingår i: International Symposium on Terahertz Science and Technology between Japan and Sweden. ; , s. 28-29
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Radio Astronomy was always a frontrunner in the demand on terahertz technology. Millimetre and sub-millimetre wave receivers operate at ground-based observatories for more than 20 years with real Terahertz instruments making its way to ground-based [1] and space-based observatories, e.g., Herschel HIFI, during last years.In this talk, we will look at the key requirements to the radio astronomy and environmental science terahertz receivers using heterodyne technology. The most promising and established technologies for high-resolution spectroscopy instrumentation will be discussed. Using results of the Group for Advanced Receiver Development for Onsala Space Observatory 20 m telescope, for Atacama Pathfinder Experiment (APEX) telescope and ALMA Project Band 5, we will illustrate the trends and achievements in the terahertz instrumentation for radio astronomy.
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| 10. |
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| 11. |
- Billade, Bhushan, 1982, et al.
(författare)
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Performance of the First ALMA Band 5 Production Cartridge
- 2012
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Ingår i: IEEE Transactions on Terahertz Science and Technology. - 2156-342X .- 2156-3446. ; 2:2, s. 208-214
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Tidskriftsartikel (refereegranskat)abstract
- We present performance of the first ALMA Band 5 production cartridge, covering frequencies from 163 GHz to 211 GHz. ALMA Band 5 is a dual polarization, sideband separation (2SB) receiver based on all Niobium (Nb) Superconductor-Insulator-Superconductor (SIS) tunnel junction mixers, providing 16 GHz of instantaneous RF bandwidth for astronomy observations. The 2SB mixer for each polarization employs a quadrature configuration. The sideband separation occurs at the output of the IF hybrid that has integrated bias-T for biasing the mixers, and is produced using superconducting thin film technology.Experimental verification of the Band 5 cold cartridge performed together with warm cartridge assembly, confirms that the system noise temperature is below 45 K over most of the RF band, which is less than five photon noise (5 hf/k). This is to our knowledge, the best results reported at these frequencies. The measurement of the sideband rejection indicates that the sideband rejection better than 10 dB over 90% of the observational band.
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| 12. |
- Billade, Bhushan, 1982, et al.
(författare)
-
Performance of the first ALMA Band 5 production cartridge
- 2011
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Ingår i: Proceedings of the 22nd International Symposium on Space Terahertz Technology, April 26-28th, 2011 - Tucson, Arizona, USA. ; , s. 56-56
-
Konferensbidrag (refereegranskat)abstract
- We present performance of the first ALMA Band 5 production cartridge, covering RF frequencies from 163 GHz to 211 GHz. ALMA Band 5 is a dual polarization, sideband separation (2SB) receiver based on all Niobium (Nb) SuperconductorInsulator-Superconductor (SIS) tunnel junction mixer, providing 16 GHz of instantaneous RF bandwidth for the astronomy observations. The 2SB mixer for each polarization employs a quadrature layout. The sideband separation occurs at the output of the IF hybrid that has integrated bias-T for biasing the mixers, and is produced using superconducting thin film technology. Experimental verification of the Band 5 cold cartridge performed together with warm cartridge assembly, confirms the system noise temperature below 45 K, less than five quantum noise (5 hf/k) over most of the RF band, which is to our knowledge, the best results at these frequencies. The measurement of the sideband rejection indicates that the sideband rejection better than 10 dB over 90% of the observational band.
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| 13. |
- Carlsson, Jörgen, et al.
(författare)
-
Conjugate chemistry and cellular processing of EGF-dextran
- 1999
-
Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 38:3, s. 313-321
-
Tidskriftsartikel (refereegranskat)abstract
- Conjugates with specific binding to the epidermal growth factor receptor, EGFR, of interest for radionuclide based imaging and therapy were prepared using mouse epidermal growth factor, mEGF, and dextran. In one type of conjugate, mEGF was coupled to dextran by reductive amination in which the free amino group on the mEGF N-terminal reacted with the aldehyde group on the reductive end of dextran. The end-end coupled conjugate could be further activated by the cyanopyridinium agent CDAP, thereby introducing tyrosines to the dextran part. In the other type of conjugate, the cyanylating procedure using CDAP was applied, first to activate dextran and then allowing for the amino terminus of mEGF to randomly attach to the dextran. In the latter case, radionuclide-labelled tyrosines or glycines could be added in the same conjugation step. All types of mEGF-dextran conjugates had EGFR-specific binding since the binding could be displaced by an excess of non-radioactive mEGF. The conjugates were to a large extent internalized in the test cells and the associated radioactivity was retained intracellularly for different times depending on both the type of cells and conjugate applied. Different intracellular 'traffic routes' for the radionuclides are discussed as well as applications for both imaging and therapy.
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| 14. |
- Ermakov, Andrey, 1960, et al.
(författare)
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Broken-step Phenomenon in SIS Mixers
- 2016
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Ingår i: 27th International Symposium on Space Terahertz Technology, ISSTT 2016, Nanjing, China.
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Konferensbidrag (refereegranskat)abstract
- In this paper, we discuss a “broken step” phenomenonin an SIS mixer. This phenomena was observed in the production version of the SIS mixers, designed for the 159-211 GHz RF band,being used for the construction of the ALMA Band 5 receiver The broken step typically appears at LO frequencies above 180 GHz and manifests itself as a sharp onset in the DC current at the middle of the quasiparticle step. Correspondingly, this affects the mixer IF response in a way that is similar to the Josephson step but is however of a different nature. Such behaviour affects the SIS mixer dynamic range and complicates the tuning of the 2SB mixer to optimize its performance, for both the receiver noise as well as the sideband rejection. In this paper, we describe results of a few experiments which were performed to understand this undesirable phenomenon.
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| 15. |
- Lapkin, Igor, 1963, et al.
(författare)
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Dual Band MM-Wave Receiver for Onsala 20 m Antenna
- 2014
-
Ingår i: Proceedings of the TWENTY-FIFTH INTERNATIONAL SYMPOSIUM ON SPACE TERAHERTZ TECHNOLOGY, April 27-30, 2014, Moscow, Russia. ; , s. 132-
-
Konferensbidrag (refereegranskat)abstract
- We present the design and the first light results for the new dual band receiver (4 mm and 3 mm bands) for Onsala Observatory 20 m antenna. For single dish operation, the receiver uses innovative on-source/off-source optical switch. Within the same optical layout, the switch, in combination with additional optical components, provides 2 calibration loads and sideband measurements possibilities. The optics layout of the receiver uses offset elliptical cold mirrors for both channels whereas the on-off switch employs flat mirrors only. The 3 mm channel employs 2SB dual polarization receiver with OMT, 4-8 GHz IF, x 2pol x (USB+LSB). The cryostat has 4 optical widows made of HDPE with anti-reflection corrugations, two for the signal and two for each frequency band cold load. The cryostat employs a two stage cryocooler RDK 408D2 and uses anti-vibration suspension of the cold-head to minimize impact of the vibrations on the receiver stability. The LO system is based on Gunn oscillator with PLL and two mechanical tuners for broadband operation, providing independently tunable LO power for each polarization. At the conference, we will present details on the receiver optics, cryostat design and the result of the first on-sky observations.
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| 16. |
- Lapkin, Igor, 1963, et al.
(författare)
-
New optics for SEPIA- Heterodyne facility instrument for the APEX telescope
- 2019
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Ingår i: ISSTT 2019 - 30th International Symposium on Space Terahertz Technology, Proceedings Book. ; , s. 150-154
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Konferensbidrag (refereegranskat)abstract
- The design of SEPIA (Swedish ESO PI Instrument for APEX) was driven by the idea of using ALMA receiver cartridges on the APEX telescope. SEPIA was installed at the guest position of the Naismith cabin A, APEX telescope in early 2015. The SEPIA cryostat and optics was designed to accommodate up to 3 ALMA cartridges. In 2017, the APEX facility instrument SHeFI was decommissioned and SEPIA was accepted as its successor. Moving SEPIA from its PI into Facility Instrument position brought additional constrains due to the severe limitations of the available space. That had led to the necessity of complete redesigning of the SEPIA tertiary optics. During February-March 2019, the new tertiary optics was installed in the APEX Cabin A and SEPIA was placed at its final Facility Instrument position. Here, we present the details of the optical design, layout of the optical component placement, the beam alignment technique, the results of the alignment and SEPIA technical commissioning results at the APEX telescope.
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| 17. |
- Lapkin, Igor, 1963, et al.
(författare)
-
Optics Design and Verification for the APEX Swedish Heterodyne Facility Instrument (SHeFI)
- 2008
-
Ingår i: In Proceedings of The 19th International Symposium on Space Terahertz Technology, Groningen, 28-30 April, 2008, ed. W. Wild, Space Research Organization of the Netherlands (SRON). ; Part I, s. 351-357
-
Konferensbidrag (refereegranskat)abstract
- We present the design and verification of the receiver optics for the Single-Pixel HeterodyneFacility Instrument (SHFI) of the APEX telescope [1]. The SHFI is designed to cover thefrequency band 211 – 1390 GHz in 6 receiver channels. Four of the receiver channels have beendesigned, installed and characterized: 211-275 GHz (Band 1); 275-370 GHz (Band 2); 385-500 GHz (Band 3); 1250-1390 GHz (Band T2). The first three bands employ 2SB SIS mixertechnology and Band T2 employs HEB mixers in a waveguide balanced mixer configuration.The entire optics design was driven by the receiver position in the telescope Nasmyth cabin“A” (Fig.1) and the aperture limit of Ø150 mm, introduced by the elevation encoder inside theNasmyth tube A. This layout and the telescope geometry (~ 6 m distance from the focal plane tothe Cabin A) lead us to choose a single-pixel configuration and required using intermediateoptics with long focal distances. The common optics path, coupling the receivers to theCassegrain sub-reflector, consists of the three offset ellipsoidal mirrors, M3, M6, M8s, and threeflat mirrors, F4, F5, and F7s. The combination M3 and M6 via flat F4, F5, creates a Gaussiantelescope, providing frequency-independent re-imaging of the antenna focal plane from theCassegrain cabin into the Nasmyth cabin A. Switching between channels is achieved by theprecision rotating of the active mirror M8s. The mirror M8s in combination with each channelactive mirror M10 provides re-imaging of the secondary onto the feed horn aperture of theselected channel. Such a configuration provides frequency independent illumination of thesecondary with the edge taper -12dB. The angular position of the flat mirrors F9 is adjustable andgives additional possibility of fine-tuning of the beam alignment from the common optics toevery receiver channels.Verification of the optical designthrough measurements is essential inorder to align the beams from thecryostat windows to the commonoptics to minimize loss in thequasioptical guiding system. In orderto verify the design of the cold optics(corrugated horn + M10) in terms ofGaussian beam parameters, a newwideband vector field measurementsystem was developed [2]. Vectorfield measurements were performedfor band 1, 2, and 3, and scalarmeasurements were employed for theTHz band.
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| 18. |
- Meledin, Denis, 1974, et al.
(författare)
-
APEX Band T2: A 1.25 – 1.39 THz Waveguide Balanced HEB Receiver
- 2008
-
Ingår i: Proceedings of The 19th International Symposium on Space Terahertz Technology, Groningen, 28-30 April, 2008, ed. W. Wild, Space Research Organization of the Netherlands (SRON). ; part I, s. 162-166
-
Konferensbidrag (refereegranskat)abstract
- A waveguide 1.25 - 1.39 THz Hot Electron Bolometer (HEB) balanced receiver was successfully developed, characterized and installed at the Atacama Pathfinder EXperiment (APEX) telescope. The receiver employs a quadrature balanced scheme using a waveguide 90-degree 3 dB RF hybrid, HEB mixers and a 180-degree IF hybrid. The HEB mixers are based on ultrathin NbN film deposited on crystalline quartz with a MgO buffer layer. Integrated into the multi-channel APEX facility receiver (SHeFI), the results presented here demonstrate exceptional performance; a receiver noise temperature of 1000 K measured at the telescope at the center of the receiver IF band 2-4 GHz, and at an LO frequency of 1294 GHz. Stability of the receiver is in line with the SIS mixer bands of the SHeFI, and gives a spectroscopic Allan time of more than 200 s at 1382 GHz with a noise bandwidth of 1 MHz.
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| 19. |
- Meledin, Denis, 1974, et al.
(författare)
-
SEPIA345: A 345 GHz dual polarization heterodyne receiver channel for SEPIA at the APEX telescope
- 2022
-
Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 668
-
Tidskriftsartikel (refereegranskat)abstract
- Context. We describe the new SEPIA345 heterodyne receiver channel installed at the Atacama Pathfinder EXperiment (APEX) telescope, including details of its configuration, characteristics, and test results on sky. SEPIA345 is designed and built to be a part of the Swedish ESO PI Instrument for the APEX telescope (SEPIA). This new receiver channel is suitable for very high-resolution spectroscopy and covers the frequency range 272- 376 GHz. It utilizes a dual polarization sideband separating (2SB) receiver architecture, employing superconductor-isolator-superconductor mixers (SIS), and provides an intermediate frequency (IF) band of 4- 12 GHz for each sideband and polarization, thus covering a total instantaneous IF bandwidth of 4 ÃÂ - 8 = 32 GHz. Aims. This paper provides a description of the new receiver in terms of its hardware design, performance, and commissioning results. Methods. The methods of design, construction, and testing of the new receiver are presented. Results. The achieved receiver performance in terms of noise temperature, sideband rejection, stability, and other parameters are described. Conclusions. SEPIA345 is a commissioned APEX facility instrument with state-of-the-art wideband IF performance. It has been available on the APEX telescope for science observations since July 2021.
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| 20. |
- Meledin, Denis, 1974, et al.
(författare)
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SEPIA345: a dual polarization 2SB cartridge receiver for APEX telescope: Design and Performance
- 2023
-
Ingår i: Proceedings of the 32nd IEEE International Symposium on Space THz Technology.
-
Konferensbidrag (refereegranskat)abstract
- A new receiver channel covering the 271-377 GHz frequency band has been installed into the SEPIA receiver at the APEX telescope. The receiver channel was designed and built in an ALMA-compatible cartridge layout. The receiver has a dual polarization layout with OMT and employs 2SB SIS mixers featuring an extended 4-12 GHz IF band, providing 32 GHz instantaneous IF bandwidth for two polarizations and two sidebands.
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| 21. |
- Meledin, Denis, 1974, et al.
(författare)
-
SEPIA345: a dual polarization 2SB cartridge receiver for APEX telescope: Design and Performance
- 2022
-
Ingår i: 32nd International Symposium of Space Terahertz Technology, ISSTT 2022.
-
Konferensbidrag (refereegranskat)abstract
- A new receiver channel covering the 271-377 GHz frequency band has been installed into the SEPIA receiver at the APEX telescope. The receiver channel was designed and built in an ALMA-compatible cartridge layout. The receiver has a dual polarization layout with OMT and employs 2SB SIS mixers featuring an extended 4-12 GHz IF band, providing 32 GHz instantaneous IF bandwidth for two polarizations and two sidebands.
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| 22. |
- Nilsson, Sara, 1990-
(författare)
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How requirements development could support design of effective and resource-efficient offerings
- 2017
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- What a company offers its customers has to fulfil several different needs, desires, constraints, which can originate from multiple different sources that affect the offering throughout its life cycle. All these criteria have to come together and be translated into statements that can support the designer’s understanding of the offering’s purpose. This translation is done through a requirements development process to provide a controlled process to define statements that describe what the offering is supposed to fulfil.This research provides insights on key challenges and success factors in requirements development to support the design of effective and resource-efficient offerings. Namely, it identifies crucial sources and aspects to be considered, and a requirements development process demonstrating how to overcome identified challenges. By getting the requirements right from the beginning, sub-optimisation and unnecessary time and risks can be avoided. The consideration of accurate sources and aspects is considered to be one of the most important factors for the successful design of offerings. It is also in the earliest phases of design, that is to say requirements development, where one has the greatest possibility to affect the environmental impact of the offering. What is missing, however, is sufficient and appropriate support in industry on how to do so.The gap between the three areas of effectiveness and resource efficiency, design of integrated offerings, and requirements development has been investigated. Results are based on findings in the literature and in industry, identified primarily by qualitative studies. In the research, 15 different companies have been included through a number of interviews and discussions.Key sources and aspects to consider in the requirements development process are identified along with challenges, and success factors that can be utilised to overcome the identified challenges. This research’s final results include an adapted requirements development process that considers the earlier-mentioned sources and aspect, challenges, and success factors. Such a requirements development process should support the design of effective and resource-efficient offerings.
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| 23. |
- Nyström, Olle, 1979, et al.
(författare)
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Optics Design and Verificatgion for the APEX Swedish Heterodyne Facility Instrument (SHeFI)
- 2009
-
Ingår i: Journal of Infrared, Millimeter, and Terahertz Waves. - : Springer Science and Business Media LLC. - 1866-6892 .- 1866-6906. ; 30:7, s. 746-761
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we present the design and verification of the optics of the Swedish Heterodyne Facility Instrument (SHeFI) receiver installed in the Atacama Pathfinder EXperiment (APEX) telescope during spring 2008. SHeFI is located in the Nasmyth instrumentation Cabin A (NCA). The receiver has been designed to have 6 frequency channels, of which four receiver channels have been built, and characterized: 211-275 GHz(Band 1), 275-370 GHz (Band 2), 385-500 GHz (Band 3), and 1250-1390 GHz (Band T2). Bands 1, 2, and T2 are installed at the telescope and are currently in operation. The optical design is driven by the requirement of frequency independent illumination of the secondary with -12 dB edge taper for each frequency channel and the limitation (beam clearance through the Nasmyth tube and the elevation encoder) imposed by the receiver position in the NCA. This paper describes the design approach, optimization, and verification of the optical system, coupling each individual receiving beam to the common optics of the telescope.
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| 24. |
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| 25. |
- Risacher, C., et al.
(författare)
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A 279-381 GHz SIS Receiver for the APEX Telescope
- 2006
-
Ingår i: Proceedings of the 16th International Symposium on Space Terahertz Technology, Chalmers University of Technology, Gothenburg, Sweden, May 2-4, 2005. ; , s. 432-437
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 26. |
- Sallerström, Pontus, et al.
(författare)
-
Scaling up Repair Workshops to Remanufacturing Facilities for Household Appliances as a Service
- 2022
-
Ingår i: Proceedings of 29<sup>th</sup> CIRP Life Cycle Engineering Conference, Leuven, Belgium.. - : Elsevier. ; , s. 43-48
-
Konferensbidrag (refereegranskat)abstract
- Original equipment manufacturers are increasingly investigating their possibilities to sell their products as a service. In order to achieve higher customer satisfaction and stronger relationship with their customers, the household appliance manufacturer Electrolux is planning to offer their products as a service. There are several ways to tackle this challenge, from having a janitor repair household appliances on-site to sending rotation units for remanufacturing. This paper aims to design a scalable concept for a repair workshop for household appliances that could, in an efficient manner, sell household appliances as a service for several residential areas.In order to fulfill the aim of this paper, empirical data was collected through interviews with people from industry and academia as well as observations from workshops. The research results present two different concept proposals, where one of the concepts treats how a repair workshop layout could look for the residential area of Rissne and the other concept how a scaled-up repair business for household appliances as a service might look. When upscaling of the repair business takes place, remanufacturing may be relevant for an additional sustainable business.
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| 27. |
- Strandberg, Magnus, 1975, et al.
(författare)
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Setup for Measurement and Characterization of Cryogenic Low-Noise Receivers
- 2024
-
Ingår i: 2024 4th URSI Atlantic Radio Science Meeting, AT-RASC 2024.
-
Konferensbidrag (refereegranskat)abstract
- In mm-wave and THz radio astronomy receivers, key components such as mixers, hybrids etc., needs to be fully characterized individually to ensure they fulfill requirement and specifications of various types. In this paper, we present details of a new measurement setup, built in the labs of the Group for Advanced Receiver Development (GARD) and a new underlaying software back-end for measuring, characterization and monitor any of the receiver's components. This software, called GMS GARD Measurement System, does allow several frontend graphical user interfaces (GUI) being written in different programming languages to connect and interact with the measurement setup simultaneously.
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| 28. |
- Vassilev, Vessen, 1969, et al.
(författare)
-
A Swedish heterodyne facility instrument for the APEX telescope
- 2008
-
Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 490:3, s. 1157-1163
-
Tidskriftsartikel (refereegranskat)abstract
- In March 2008, the APEX facility instrument was installed on the telescope at the site of Lliano Chajnantor in northern Chile. The main objective of the paper is to introduce the new instrument to the radio astronomical community. It describes the hardware configuration and presents some initial results from the on-sky commissioning.The heterodyne instrument covers frequencies between 211 GHz and 1390 GHz divided into four bands. The first threebands are sideband-separating mixers operating in a single sideband mode and based on superconductor-insulator-superconductor (SIS) tunnel junctions. The fourth band is a hot-electron bolometer, waveguide balanced mixer. All bands are integrated in a closedcycle temperature-stabilized cryostat and are cooled to 4 K.We present results from noise temperature, sideband separation ratios, beam, and stability measurements performed on the telescope as a part of the receiver technical commissioning. Examples of broad extragalactic lines are also included.
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| 29. |
- Albrektson, Anna, 1966-, et al.
(författare)
-
Cool Nature : Utopian Landscapes in Sweden 1780–1840
- 2022
-
Ingår i: Sjuttonhundratal. - : UiT The Arctic University of Norway. - 1652-4772 .- 2001-9866. ; 19, s. 94-116
-
Tidskriftsartikel (refereegranskat)abstract
- In this essay, an interdisciplinary group of researchers sets out to address the period 1780–1840 in Sweden in a new way, by placing nature at its centre. With the help of ecocritical and transcultural theory, combined with renewed attention to the Swedish fine arts, learned discourses, and practices, we suggest a new approach to these revolutionary decades. The perceived dissonance, the interplay between climatic conditions and cultural template in early modern and modern Sweden, has not been fully addressed in current research, despite the fact that the relationship between humankind and the environment is a central issue in contemporary society and scholarship. Representations of nature situate the nation, they negotiate the relationship between a sensed reality and an ideal, between human and more-than-human beings. We suggest a focus on the unpredictable space created by negotiations of nature in Swedish representations during this crucial period, and, furthermore, on the ways in which this creative space is charged with utopian possibilities in the early Anthropocene. This is the background and the driving force of the planned research project ‘Cool Nature: Utopian Landscapes in Sweden 1780–1840’.
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| 30. |
- Amils, R. I., et al.
(författare)
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Compact cryogenic wide-band balanced amplifiers with superconducting 90° hybrids for the IF of submillimeter-wave SIS mixers
- 2019
-
Ingår i: ISSTT 2019 - 30th International Symposium on Space Terahertz Technology, Proceedings Book. ; , s. 57-62
-
Konferensbidrag (refereegranskat)abstract
- The pressing demand for mm-wave cryogenic radio astronomy receivers with increasing instantaneous bandwidth has spurred interest in more complex intermediate frequency amplifier configurations, like the balanced amplifier, as the traditional options have increasing difficulties to comply either with the noise or the input matching specifications. This solution is typically penalized by the slight increment in noise produced by the quadrature hybrid losses. We propose a balanced amplifier using a novel 3 dB quadrature hybrid coupler design with superconducting lines. The prototype unit built for the 4-12 GHz band integrates in the same module the hybrid coupler chips, the low noise amplifiers and the bias circuitry. The mechanical design allows for an independent testing of the individual amplifiers. The average noise temperature is 4.4 K, only 0.3 K more than the average of its amplifiers. The input reflection improves more than 10 dB. This compact balanced amplifier is also compared with a non-integrated version, showing an improvement in noise and reflection. It has been tested in a complete mm-wave receiver, with advantage over other IF schemes.
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| 31. |
- Ammenberg, Jonas, et al.
(författare)
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Products in environmental management systems : the role of auditors
- 2005
-
Ingår i: Journal of Cleaner Production. - : Elsevier BV. - 0959-6526 .- 1879-1786. ; 13:4, s. 417-431
-
Tidskriftsartikel (refereegranskat)abstract
- For standardized environmental management systems (EMS) to be environmentally effective tools, they should affect important environmental aspects related to flows of materials and energy, which for manufacturing companies are closely connected to their products. This paper presents how external environmental auditors interpret and apply important product-related requirements of ISO 14001 at manufacturing companies in Sweden.The results indicate that the link between EMS and products is rather weak. Products are seldom regarded as significant environmental aspects and are therefore not within the main scope of many EMS, which are mainly focused on sites. However, all of the interviewed auditors require that some kind of environmental considerations be incorporated into product development, but these considerations are to large extent site oriented; how they are prioritized in relation to other factors such as economics and other customer priorities appears to be up to the companies.The paper includes some recommendations to strengthen the role of products within the framework of standardized EMS.
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| 32. |
- Ammenberg, Jonas, et al.
(författare)
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Products in environmental management systems : drivers, barriers and experiences
- 2005
-
Ingår i: Journal of Cleaner Production. - : Elsevier BV. - 0959-6526 .- 1879-1786. ; 13:4, s. 405-415
-
Tidskriftsartikel (refereegranskat)abstract
- Do standardised environmental management systems (EMS) lead to improved environmental performance? This depends on to what extent these systems lead to changes in important flows of material and energy, which for manufacturing companies, in turn, mean that the product development process is important. Consequently, it appears vital to investigate the connection between EMS and ‘Design for the Environment’ (DFE), i.e. the connection between these management systems and concepts that deal with environmental issues in product development.This paper presents product-oriented environmental management systems (POEMS), including characteristics of existing models, experiences from projects where these models have been tested and experiences concerning the product connection in ‘normal’ EMS. It includes a discussion of important factors influencing to what extent DFE activities are integrated into EMS and/or the outcome of such integration.There are many motives for integrating the two concepts. Firstly, DFE thinking might enrich EMS by contributing with a life-cycle perspective. If EMS encompassed products' life cycles to a greater extent, they would be a better complement to the often facility-oriented legal requirements and authority control. Secondly, EMS might remove the pilot project character of DFE activities and lead to continuous improvement. Thirdly, integration could lead to successful co-operation, both internally and externally. However, existing studies show that there is a mixed picture concerning the extent ‘normal’ EMS currently encompass products.
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| 33. |
- Andersson, Frida, et al.
(författare)
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Design for Manufacturing of Composite Structures for Commercial Aircraft : The Development of a DFM strategy at SAAB Aerostructures
- 2014
-
Ingår i: Procedia CIRP. - : Elsevier. - 2212-8271. ; 17, s. 362-367
-
Tidskriftsartikel (refereegranskat)abstract
- Within the aircraft industry, the use of composite materials such as carbon fiber reinforced plastics (CFRPs) is steadily increasing, especially in structural parts. Manufacturability needs to be considered in aircraft design to ensure a cost-effective manufacturing process. The aim of this paper is to describe the development of a new strategy for how SAAB Aerostructures addressing manufacturability issues during the development of airframe composite structures. Through literature review, benchmarking and company interviews, a design for manufacturing (DFM) strategy was developed. The strategy ensures that the important factors for successful DEM management are implemented on strategic, tactical and operational levels that contribute to a more cost-efficient product development process and aircraft design.
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| 34. |
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| 35. |
- Berglin, Ewa, MD, PhD, 1955-, et al.
(författare)
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Radiological outcome in rheumatoid arthritis is predicted by presence of antibodies against cyclic citrullinated peptide before and at disease onset, and by IgA-RF at disease onset
- 2006
-
Ingår i: Annals of the Rheumatic Diseases. - : BMJ Publishing Group Ltd. - 0003-4967 .- 1468-2060. ; 65:4, s. 453-458
-
Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To evaluate the significance of antibodies against cyclic citrullinated peptide (anti-CCP) and rheumatoid factors (RFs), before the onset of rheumatoid arthritis and when presenting as early disease (baseline), for disease activity and progression. METHODS: 93 of a cohort of 138 patients with early rheumatoid arthritis (<12 months of symptoms) had donated blood before symptoms of rheumatoid arthritis (defined as pre-patients) and were identified from among blood donors within the Medical Biobank of northern Sweden. Disease activity (erythrocyte sedimentation rate (ESR), C reactive protein, joint score, global visual analogue scale) and radiological destruction in hands and feet (Larsen score) were assessed at baseline and after two years. Anti-CCP antibodies and RFs were analysed using enzyme immunoassays. HLA shared epitope (SE) alleles (DRB1*0401/0404) were identified. RESULTS: Patients with anti-CCP antibodies before disease onset had significantly higher Larsen score at baseline and after two years. In multiple regression analyses baseline values of anti-CCP/IgA-RF/IgG-RF/IgM-RF, swollen joint count, and Larsen score significantly predicted radiological outcome at two years. In logistic regression analyses, baseline values of anti-CCP antibodies/IgA-RF, therapeutic response at six months, and swollen joint count/ESR significantly predicted radiological progression after two years. The baseline titre of anti-CCP antibodies was higher in patients with radiological progression and decreased significantly in those with response to therapy. SE allele carriage was associated with a positive test for anti-CCP antibodies in pre-patients and in early rheumatoid arthritis. CONCLUSIONS: Presence of anti-CCP antibodies before disease onset is associated with more severe radiological damage. The titre of anti-CCP antibodies is related to disease severity.
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| 36. |
- Billade, Bhushan, 1982, et al.
(författare)
-
ALMA band 5 cartridge performance
- 2010
-
Ingår i: 21st International Symposium on Space Terahertz Technology 2010, ISSTT 2010; Oxford; United Kingdom; 23 March 2010 through 25 March 2010. - 9781617823626 ; , s. 112-
-
Konferensbidrag (refereegranskat)abstract
- Work presented here concerns the design and performance of the ALMA Band 5 cold cartridge, one of the 10 frequency channels of ALMA project, a radio interferometer under construction at Atacama Desert in Chile. The Band 5 cartridge is a dual polarization receiver with the polarization separation performed by orthomode transducer (OMT) [1]. For each polarization, Band 5 receiver employs sideband rejection (2SB) scheme based on quadrature layout, with SIS mixers covering 163-211 GHz with 4-8 GHz IF. The LO injection circuitry is integrated with mixer chip and is implemented on the same substrate, resulting in a compact 2SB assembly. Amongst the other ALMA bands, the ALMA Band 5 being the lowest frequency band that uses all cold optics, has the largest mirror. Consequently, ALMA Band 5 mirror along with its support structure leaves very little room for placing OMT, mixers and IF subsystems. The constraints put by the size of cold optics and limited cartridge space, required of us to revise the original 2SB design and adopt a design where all the components like OMT, mixer, IF hybrid, isolators and IF amplifier are directly connected to each other without using any co-ax cables in-between. The IF subsystem uses the space between 4 K and 15 K stage of the cartridge and is thermally connected to 4 K stage. Avoiding co-ax cabling required use of custom designed IF hybrid, furthermore, due to limited cooling capacity at 4 K stage, resistive bias circuitry for the mixers is moved to 15 K stage and the IF hybrid along with an integrated bias-T is implemented using superconducting micro-strip lines. The E-probes for both LO and RF waveguide-to-microstrip transitions are placed perpendicular to the wave direction (back-piece configuration). The RF choke at the end of the probes provides a virtual ground for the RF/LO signal, and the choke is DC grounded to the chassis. The on-chip LO injection is done using a microstrip line directional coupler with slot-line branches in the ground plane. The isolated port of the LO coupler is terminated by floating wideband elliptical termination. The mixer employs two SIS junctions with junction area of 3 μm2 each, in twin junction configuration, followed by a quarter wave transformer to couple it to the signal probe. A quarter-wave high impedance line on an extra layer of SiO2 is used to extract the IF by separating from RF [2]. At the conference, we plan to present details of the cartridge design and results of the experimental characterization of the ALMA Band 5 cold cartridge.
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| 37. |
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| 38. |
- Bryhn, Andreas, et al.
(författare)
-
Fisk- och skaldjursbestånd i hav och sötvatten 2019 : Resursöversikt
- 2020
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Fisken i havet är en resurs som rör sig fritt över nationella gränser. EU har därför en gemensam fiskeripolitik (GFP). Många arter som är viktiga för Sverige regleras inte i GFP och förvaltas därför nationellt.Denna rapport syftar till att:beskriva utvecklingen av fiskeripolitikenförklara den nuvarande politikens mål och regelverk och dess relation till mål och regler på miljöområdetförklara politikens nationella genomförande och det nationella handlingsutrymmetexemplifiera hur Havs- och vattenmyndigheten arbetat med att reglera fisket.
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| 39. |
- Bryhn, Andreas, et al.
(författare)
-
Fisk- och skaldjursbestånd i hav och sötvatten 2020 : Resursöversikt
- 2021
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- I rapporten kan du ta del av bedömningen som görs av situationen för bestånd som regleras inom ramen för EU:s gemensamma fiskeripolitik (GFP). Bedömningarna baseras på det forskningssamarbete och den rådgivning som sker inom det Internationella Havsforskningsrådet (ICES). Totalt redovisas underlag och råd för 48 fisk- och skaldjursarter.De bestånd som förvaltas nationellt baseras på de biologiska underlagen, och rådgivningen i huvudsak på den forskning och övervakning samt analys som bedrivs av Institutionen för akvatiska resurser vid Sveriges lantbruksuniversitet (SLU Aqua) samt yrkesfiskets rapportering.
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| 40. |
- Burman, Pia, et al.
(författare)
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11C-metomidate PET/CT detected multiple ectopic adrenal rest tumors in a woman with congenital adrenal hyperplasia
- 2021
-
Ingår i: Journal of Clinical Endocrinology and Metabolism. - : Oxford University Press. - 0021-972X .- 1945-7197. ; 106:2, s. e675-e679
-
Tidskriftsartikel (refereegranskat)abstract
- ContextWomen with congenital adrenal hyperplasia (CAH) may present with androgen excess that is difficult to control with conventional suppressive doses of glucocorticoids. Clinical management is challenging, and the woman is at great risk of developing steroid-induced complications.Patients and MethodsA 32-year-old woman with salt-wasting CAH due to 21-hydroxylase deficiency underwent right-sided adrenalectomy because of a large myelolipoma. Over the years, androgens became increasingly difficult to suppress on prednisolone 5 + 0 + 2.5 mg daily, and at age 39 years the left adrenal with an enlarging myelolipoma was removed. A month later serum testosterone levels had increased from 4.1 preoperatively to 18.3 nmol/L (reference 0.2-1.8 nmol/L), and adrenocorticotropin levels from 32 to 283 pmol/L (reference < 14 pmol/L). No adrenal parenchyma was visualized on computed tomography (CT). In the further search for the source of the markedly elevated testosterone, positron emission tomography (PET) was performed with 2 different tracers, 18fluorodeoxyglucose (18FDG) reflecting glucose metabolism and 11C-metomidate, an inhibitor of 11-β-hydroxylase targeting adrenocortical tissue.Results18FDG-PET/CT with cosyntropin stimulation showed ovarian/paraovarian hypermetabolism, suggestive of adrenal rest tumors. Further characterization with 11C-metomidate PET/CT showed uptakes localized to the ovaries/adnexa, behind the spleen, and between the right crus diaphragmaticus and inferior vena cava.ConclusionAdrenal rest tumors can give rise to high androgen levels in spite of suppressive supraphysiological glucocorticoid doses. This case illustrates, for the first time, the value of 11C-metomidate PET as a sensitive method in documenting adrenal rest tumors, currently considered rare in women with CAH.
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| 41. |
- Burroughs, Brady, 1970-
(författare)
-
Ahmed for Architecture Students
- 2019
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Calling all architectural feminist killjoys!Academic publishers Routledge produce a series called ‘Thinkers for Architects’, introducing philosophical and theoretical ideas to an architectural audience. The fifteen current titles include the usual suspects, Bourdieu, Foucault, Derrida, Merleau-Ponty, with one female thinker, Irigaray. In this publication, we begin to suggest a new series and to outline a book they should have commissioned, ‘Ahmed for Architecture Students’, as a critical revision and architectural killjoy. Based on key texts spanning queer feminist Sara Ahmed’s career as a critical scholar, this master’s seminar course has collectively produced a fanzine to introduce Ahmed’s ideas and concepts, along with possible connections to the discipline and culture of architecture, making them accessible to architecture students and practitioners.We have provided three digital files: 1) Digital Spreads - Fanzine, for reading directly on a digital device. 2) Print version - Fanzine Inlay, for printing your own hard copy of the inner pages. 3) Print version - Fanzine Cover, for printing your own hard copy of the outer cover. (On the back of the cover, you will find DIY Instructions to assemble your own fanzine.)We think the fanzine is ‘amazingly awesome’ and encourage you to share the link to the DiVA database for download, so we have an idea of how many people find our publication. And why not organize a ‘DIY Fanzine workshop’, to make and share the fanzine with friends? Bake a lemon poppy seed cake for starters and be sure to use recycled paper!
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| 42. |
- Carlson, Annelie, et al.
(författare)
-
REMAnufactuRing – Key enABLEr to future business (REMARKABLE)
- 2023
-
Konferensbidrag (refereegranskat)abstract
- Circularity through remanufacturingRemanufacturing can be described as a process of bringing used products to “like-new” functional state. It is an industrial process whereby products referred as cores are restored to useful life. During this process the core pass through a number of remanufacturing steps, e.g., inspection, disassembly, part replacement/refurbishment, cleaning, reassembly, and testing to ensure it meets the desired product standards’.Remanufacturing involves not only new processes but also necessitates changes in product design, the adoption of new business models, advancements in information management, and the inclusion of sustainability assessments. These assessments ensure that the new designs and circular business models implemented are not only circular but also sustainable. All these aspects form a crucial part of the REMARKABLE project, contributing to the development of a comprehensive remanufacturing ecosystem.The purpose of the REMARKABLE project is to support manufacturers to become more resilient, circular, and sustainable through remanufacturing and contribute to a more efficient use ofresources.Project activities and initial resultsThe REMARKABLE project involves six highly engaged manufacturing companies from a variety of sectors that will collaborate during 2022-2025. At first, workshops have taken place with each company to identify needs, challenges and ambitions. In addition, five student projects have been conducted during spring 2022 along with two study visits at participating companies.Initial company discussions shows that remanufacturing tends to question current business models and generate grounds for circular business models development (e.g. leasing, rental, deposit system). Remanufacturing often also questions the current value network and the actors in it, as remanufacturing flows can generate need of new business relationships whilst maintaining current business models.Remanufacturing poses challenges due to small batch sizes, low automation, and reliance on manual labor. Flexibility and specific capabilities are needed to handle uncertainties, complexity in planning, and ensure efficiency. Tools, methods, and frameworks are necessary to effectively balance all three pillars of sustainability. The development process of remanufacturing systems plays a critical role in achieving sustainability performance which also requires effective information management.Commonly, the products are not adapted for remanufacturing. Within the REMARKABLE project we are investigating how to make the products easier to remanufacture by design. This includes for example aspects of making the product easier to clean and disassemble.
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| 43. |
- Casper, Robert, et al.
(författare)
-
Addressing Today’s challenges in automotive remanufacturing
- 2018
-
Ingår i: Journal of Remanufacturing. - : Springer Netherlands. - 2210-4690 .- 2210-464X. ; 8, s. 93-102
-
Tidskriftsartikel (refereegranskat)abstract
- Automotive remanufacturing companies are nowadays facing a wide range ofchallenges. Typical challenges from the point of view of suppliers, producers and customers.Several process steps are analysed and problem fields are dissected: From the core management,to disassembly and cleaning to machining and testing. The main fields of challengesanalysed in this paper are: the vagueness in respect of fiscal value, environmental regulationsand taxation of core parts, the important need for a continuing qualification of staff andengineers, an efficient core management, the adaption of pricing models and the competence tohandle the growing variety and complexity. The focus of this analysis lies on activities of theindependent after-market (IAM) for remanufactured products.
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| 44. |
- Casper, Robert
(författare)
-
Automotive Remanufacturing in a Changing Market : Challenges and Opportunities in a market with a growing share of electric cars
- 2021
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This doctoral thesis deals with closed-loop supply chains, which include remanufacturing. Remanufacturing can be described as an industrial process to bring back a used good into an “as-good-as-new” condition. Furthermore, focus is put on one of the largest global industry sectors: the automotive industry. The objective of this doctoral thesis is to provide an exploration of the automotive remanufacturing industry and to identify current and future challenges and opportunities with special consideration of a growing share of EVs. This objective is reached by:conducting the literature research on automotive part remanufacturing and the latest electric vehicle (EV) technologies,performing interviews and questionnaires with experts from the automotive part remanufacturing industry, andanalyzing and visualizing the processes of automotive part remanufacturing. Firstly, this thesis brings up an exploration of the challenges this industry is facing today: difficulties in the sourcing and returning of used automotive parts, challenges to identify and disassembly parts, difficulties implementing industrial processes to bring the used parts back into an “as-good-as-new” condition and obstacles to handle and recycle the parts which cannot be reused in an economic and ecological way. Secondly, this thesis deals with matters resulting from the latest trends in the phase of technical transition towards EVs. This means, for example, new parts (e.g., electric motors, battery packs), new market actors (e.g., Tesla) and different remanufacturing processes (e.g., high-voltage battery remanufacturing) are offering both opportunities and risks: potential for new business, but at the same time, capital-intensive investments into know-how (e.g., schooling, specifications, staff) and machinery and handling new sorts of waste (e.g., hazardous components and materials of batteries). In a final step, these current and future opportunities and challenges are evaluated, and recommendations for industrial actions are given.
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| 45. |
- Casper, Robert, et al.
(författare)
-
Electrification in the automotive industry : effects in remanufacturing
- 2021
-
Ingår i: Journal of Remanufacturing. - : Springer Science and Business Media LLC. - 2210-4690 .- 2210-464X. ; 11:2, s. 121-136
-
Tidskriftsartikel (refereegranskat)abstract
- The automotive market is changing. For many years, cars with internal-combustion engines were dominant. Recently, more cars with alternative drive trains have become available, and their market share has increased, a trend that has had an effect on the remanufacturing industry for automotive parts. This paper aims to describe and evaluate the challenges and opportunities in the coming years for the remanufacturing industry as a result of the increasing number and share of electric vehicles. Both theory and empirical data have been used to meet this aim. From theory, the two different drive train concepts of the internal combustion engine and the battery electric vehicle are described, along with the major differences from a remanufacturing standpoint. These differences and effects are described, evaluated, and fully or partly confirmed by industry experts. The results show that future market actors are unset today, less space-consuming machinery parks will be needed, major investments into knowledge and equipment (especially for testing) will be required, and the necessity to handle different kinds of end-of-use/life solutions, especially the recovery for the electric vehicle battery packs, will be a challenge. As future development is still uncertain, the authors recommend that market actors investigate the challenges and opportunities highlighted in this paper and watch future developments carefully.
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| 46. |
- Casper, Robert, et al.
(författare)
-
Reverse Logistic Transportation and Packaging Concepts in Automotive Remanufacturing
- 2018
-
Ingår i: Procedia Manufacturing. - : Elsevier. - 2351-9789. ; 25, s. 154-160
-
Tidskriftsartikel (refereegranskat)abstract
- A key process in a closed-loop supply chain is managing and challenging the transportation and packaging management. Strict environmental regulations in connection with transport of environmentally hazardous substances (e.g. oil) are offering a highcost-saving potential in connection with an optimised transportation and packaging concept. The aim of this case orientated paperis to provide the framework for the management of reverse flow of materials in automotive industry. The emphasis is placed onthe remanufacturing activities. To obtain and verify the necessary information for the above mentioned problems, differentmethods and techniques have been applied: 1) Relevant, available literature in connection with this matter was studied; 2) Dataand documents was requested directly by relevant market actors; 3) The clustered data was analysed and samples werehighlighted; and 4) The data was evaluated and recommended courses of action were given. The results show that the mainproblems appear in the area of forward and reverse logistics: Packaging concepts which do not protect the product in an optimalway (forward / reverse logistics). Moreover, packaging concepts which do not protect the environment against potential negativeinfluence of a used part (reverse logistics) A best practice for the transportation of engine components is given and evaluated: Anengine in a metal frame with oil-pan. Securely attached by bolts. Packed in plastic bag.
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| 47. |
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| 48. |
- Chari, Arpita, et al.
(författare)
-
Sustainability in Produktion2030 : Sustainability and circular economy actions within the project portfolio of the Produktion2030 strategic innovation programme
- 2021
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Global manufacturing industry is undergoing tremendous transformation towards increased sustainability. This vital, industrial sector is rapidly enhancing its capability for resource efficient, circular, and climate neutral processes and business models. Industry is also rapidly recognizing sustainability and resilience measures as competitive advantages and unique selling points. Companies are being both nudged and forced into sustainable, resource-efficient businesses to comply with new demands and regulations from for example the European Commission’s Green Deal and global policy like the United Nations' Sustainable Development Goals (SDGs).Customer needs as well as government policies and regulations are enforced through e.g. economic bonus and penalty systems, accelerating transformation. This change process is complex, requiring new knowledge and innovation. Therefore, Industrial sustainability is at the core of Produktion2030, the national Swedish Strategic Innovation Programme for manufacturing industry.The vision of Produktion2030 is to enable a competitive and sustainable Swedish manufacturing industry. Produktion2030 is putting strong efforts into acceleration of the green transformation, creating crossdisciplinary and multi-stakeholder collaboration, increasing national innovation capacity and agility, and driving competence development as well as workforce upskilling. In 2020, the Produktion2030 Programme Office and Supervisory Group commissioned a study to map sustainability achievements within the programme's total product portfolio.A national group of sustainability experts from Chalmers University of Technology, Linköping University, Royal Institute of Technology, and the institute RISE were invited to analyse all past and present Produktion2030 projects, from sustainability and circular economy perspectives.This report presents the results from the study, highlighting a selection of contributions to industrial sustainability achieved by Produktion2030 during the programme’s first six years. Data for the study was gathered during the spring of 2020. Representatives from all ongoing and finalised projects within the Produktion2030 programme were invited to an online survey. The objective was to investigate specific project impacts in terms of sustainability and implementation of a circular economy.Results showed that all Produktion2030 projects had applied at least one dimension of sustainability, economic. Further, 71% of the projects also covered the environmental dimension. Several projects applied sustainability trade-offs, where an improvement within one sustainability dimension affected other dimensions negatively. The UN Sustainable Development Goals #8, #9 and #12, were considered most relevant by the projects. Implementation or inclusion of circular economy was also common (45%) among the projects. Projects adapted circular economy concepts differently, according to their self-defined project scope and system boundaries. Finally, 65 % of the projects implemented Industry 4.0 concepts and digital solutions, to increase and accelerate the sustainability impact. In conclusion, the study of sustainability efforts within the complete portfolio of Produktion2030 projects by 2020 showed that the programme is strongly contributing to the transformation of manufacturing industry in Sweden towards sustainability.Produktion2030 has a deep, strategic commitment to address the challenges of the UN Sustainable Development Goals. This study shows that Produktion2030 also has an excellent transformational capability to deliver research, innovation, and education results that influences sustainability factors. The results strongly support the manufacturing community in Sweden, allowing industry, academia, and institutes to act towards a more sustainable, resilient, and circular society.
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| 49. |
- Chari, Arpita, 1986, et al.
(författare)
-
Swedish manufacturing practices towards a sustainability transition in industry 4.0 : A resilience perspective
- 2021
-
Ingår i: Proceedings of the ASME 2021 16th International Manufacturing Science and Engineering Conference, MSEC 2021. - : American Society of Mechanical Engineers. - 9780791885062 ; 1
-
Konferensbidrag (refereegranskat)abstract
- The Swedish strategic innovation programme, Produktion2030, is a national long-term effort towards global industrial competitiveness addressing Swedish industry’s transition towards climate goals of the European Green Deal while simultaneously realising smart manufacturing and Industry 4.0 (I4.0). This paper investigated the extent of sustainability implementation and implications of I4.0 technologies through a nation-wide quantitative survey in Produktion2030’s 113 collaborative research projects. The analysis showed that 71% of the assessed projects included environmental aspects, 60% social aspects, and 45% Circular Economy (CE) aspects. Further, 65% of the projects implemented I4.0 technologies to increase overall sustainability. The survey results were compared with literature to understand how I4.0 opportunities helped derive sustainability and CE benefits. This detailed mapping of the results along with eight semi-structured interviews revealed that a majority of the projects implemented I4.0 technologies to improve resource efficiency, reduce waste in operations and incorporate CE practices in business models. The results also showed that Swedish manufacturing is progressing in the right direction of sustainability transition by deriving key resilience capabilities from I4.0-based enablers. Industries should actively adopt these capabilities to address the increasingly challenging and unpredictable sustainability issues arising in the world and for a successful transition towards sustainable manufacturing in a digital future.
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| 50. |
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