| 1. |
- Ademark, Pia, et al.
(author)
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Softwood hemicellulose-degrading enzymes from Aspergillus niger: Purification and properties of a β-mannanase
- 1998
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In: Journal of Biotechnology. - 1873-4863. ; 63:3, s. 199-210
-
Journal article (peer-reviewed)abstract
- The enzymes needed for galactomannan hydrolysis, i.e. β-mannanase, α-galactosidase and β-mannosidase, were produced by the filamentous fungus Aspergillus niger. The β-mannanase was purified to electrophoretic homogeneity in three steps using ammonium sulfate precipitation, anion-exchange chromatography and gel filtration. The purified enzyme had an isoelectric point of 3.7 and a molecular mass of 40 kDa. Ivory nut mannan was degraded mainly to mannobiose and mannotriose when incubated with the β-mannanase. Analysis by 1H NMR spectroscopy during hydrolysis of mannopentaose showed that the enzyme acts by the retaining mechanism. The N-terminus of the purified A. niger β-mannanase was sequenced by Edman degradation, and comparison with Aspergillus aculeatus β-mannanase indicated high identity. The enzyme most probably lacks a cellulose binding domain since it was unable to adsorb on cellulose.
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| 2. |
- Lowry, Stephanie, 1979-, et al.
(author)
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Lightweight, Viewpoint-Invariant Visual Place Recognition in Changing Environments
- 2018
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In: IEEE Robotics and Automation Letters. - : Institute of Electrical and Electronics Engineers (IEEE). - 2377-3766. ; 3:2, s. 957-964
-
Journal article (peer-reviewed)abstract
- This paper presents a viewpoint-invariant place recognition algorithm which is robust to changing environments while requiring only a small memory footprint. It demonstrates that condition-invariant local features can be combined with Vectors of Locally Aggregated Descriptors (VLAD) to reduce high-dimensional representations of images to compact binary signatures while retaining place matching capability across visually dissimilar conditions. This system provides a speed-up of two orders of magnitude over direct feature matching, and outperforms a bag-of-visual-words approach with near-identical computation speed and memory footprint. The experimental results show that single-image place matching from non-aligned images can be achieved in visually changing environments with as few as 256 bits (32 bytes) per image.
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| 3. |
- Muroyama, Norihiro, et al.
(author)
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Argon adsorption on MCM-41 mesoporous crystal studied by in situ synchrotron powder X-ray diffraction
- 2008
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In: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 112:29, s. 10803-10813
-
Journal article (peer-reviewed)abstract
- Equilibrium argon adsorption from the gas phase on mesoporous MCM-41 silica of hexagonal structure is directly studied by in situ synchrotron powder X-ray diffraction (XRD) measurements at SPring-8. The diffraction intensity data is analyzed by extending the previously developed analytical formula for the crystal structure factors of MCM-41 to account for argon adsorbed in the pores. It is clearly observed that argon adsorbs in layers on the pore walls at low gas pressures and exhibits sudden capillary condensation as the gas pressure increased. The proposed method of interpretation of XRD data allows one to calculate the density ratio between the silica wall and condensed argon, the pore size, and the pore wall fluctuation/roughness, together with the thickness of the adsorbed layer as a function of the gas pressure. The results of in situ XRD experiments are compared with the results of argon adsorption volumetric experiments. The adsorption data are interpreted with the quench solid density functional theory (QSDFT), which takes into account the pore wall roughness. The perfect agreement of the QSDFT isotherm predicted from the adsorption data and the XRD recalculated isotherm suggests that the adsorption porosimetry and XRD measurements can be reconciled provided a proper interpretation of the experimental data.
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| 4. |
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| 5. |
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| 6. |
- Zakova, Jitka, 1980-
(author)
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Advanced fuels for thermal spectrum reactors
- 2012
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Doctoral thesis (other academic/artistic)abstract
- The advanced fuels investigated in this thesis comprise fuels non− conventional in their design/form (TRISO), their composition (high content of plutonium and minor actinides) or their use in a reactor type, in which they have not been used before (e.g. nitride fuel in BWR). These fuels come with a promise of improved characteristics such as safe, high temperature operation, spent fuel transmutation or fuel cycle extension, for which reasons their potentialis worth assessment and investigation. Their possible use also brings about various challenges, out of which some were addressed in this thesis. TRISO particle fuels with their superior retention abilities enable safe, high−temperature operation. Their combination with molten salt in the Advanced High Temperature Reactor (AHTR) concept moreover promises high operating temperature at low pressure, but it requires a careful selection of the cooling salt and the TRISO dimensions to achieve adequate safety characteristic, incl. a negative feedback to voiding. We show that an AHTR cooled with FLiBe may safely operate with both Pu oxide and enriched U oxide fuels. Pu and Minor Actinides (MA) bearing fuels may be used in BWR for transmutation through multirecycling; however, the allowable amounts of Pu and MA are limited due to the degraded feedback to voiding or low reactivity.We showed that the main positive contribution to the void effect in the fuelswith Pu and MA content of around 11 to 15% consist of the decreased thermalcapture probability in Pu-240, Pu-239 and Am-241 and increased fast and resonance fission probability of U-238, Pu239 and Pu-240. The total void worthmoreover increases during multirecycling, limiting the allowable amount ofMA to 2.45% in uranium−based fuels. An alternative, thorium−based fuel allows for 3.45% MA without entering the positive voiding regime at any point of the multirecycling. The increased alpha−heating associated with the use of transmutation fuels, is at level 24−31 W/kgFUEL in the uranium based fuels and 32−37 W/kgFUEL in the thorium−based configurations. The maximum value of the neutron emission, reached in the last cycle, is 1.7·106 n/s/g and 2·106 n/s/g for uranium and for thorium−based fuels, respectively. Replacing the standard UO2 fuel with higher−uranium density UN orUNZrO2 fuels in BWR shows potential for an increase of the in-core fuelresidence time by about 1.4 year. This implies 1.4% higher availability of the plant. With the nitride fuels, the total void worth increases and the efficiency of the control rods and burnable poison deteriorates, but no major neutronics issue has been identified. The use of nitride fuels in the BWR environment is conditioned by their stability in hot steam. Possible methods for stabilizing nitride fuels in water and steam at 300◦ C were suggested in a recent patentapplication.
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| 7. |
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| 8. |
- Zakova, Jitka, et al.
(author)
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Analysis of the reactivity coefficients of the advanced high-temperature reactor for plutonium and uranium fuels
- 2008
-
In: Annals of Nuclear Energy. - : Elsevier BV. - 0306-4549 .- 1873-2100. ; 35:5, s. 904-916
-
Journal article (peer-reviewed)abstract
- The conceptual design of the advanced high-temperature reactor (AHTR) has recently been proposed by the Oak Ridge National Laboratory, with the intention to provide and alternative energy source for very high temperature applications. In the present study, we focused on the analyses of the reactivity coefficients of the AHTR core fueled with two types of fuel: enriched uranium and plutonium from the reprocessing of light water reactors irradiated fuel. More precisely, we investigated the influence of the outer graphite reflectors on the multiplication factor of the core, the fuel and moderator temperature reactivity coefficients and the void reactivity coefficient for five different molten salts: NaF, BeF2, LiF, ZrF4 and Li2BeF4 eutectic. In order to better illustrate the behavior of the previous parameters for different core configurations, we evaluated the moderating ratio of the molten salts and the absorption rate of the key fuel nuclides, which, of course, are driven by the neutron spectrum. The results show that the fuel and moderator temperature reactivity coefficients are always negative, whereas the void reactivity coefficient can be set negative provided that the fuel to moderator ratio is optimized (the core is undermoderated) and the moderating ratio of the coolant is large.
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| 9. |
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| 10. |
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| 11. |
- Anrup, Roland, 1952-
(author)
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La Paz y las Zonas de Reserva Campesina
- 2013
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In: Ciudad Paz-ando. - Bogotá : IPAZUD. - 2011-5253. ; 6:1, s. 103-122
-
Journal article (peer-reviewed)abstract
- Atravesamos la guerra civil colombiana que ya tiene medio siglo de existencia y que en la actualidad se encuentra en una fase crítica, y al mismo tiempo, estamos atravesados por ella. Por lo tanto, pensar esta guerra en la que nos encontramos inmersos no es solamente un deber, una responsabilidad y una obligación; es también una necesidad con respecto a la cual nadie puede ser indiferente y hoy menos que nunca. Ahora cuando la insurgencia y el gobierno debaten en la Habana sobre la posibilidad de una paz, es esta responsabilidad intelectual con el presente colombiano la que lleva a formular algunos interrogantes necesarios para dilucidar las implicaciones del uso, los significados y las consecuencias de la forma en que se entiende la tan mentada “paz”. ¿A qué se refiere cada una de las partes cuando habla de “la paz”? ¿Qué es “la paz”? ¿Cómo podríamos entender la compleja relación que se instaura entre la guerra y la paz?
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| 12. |
- Azcarate, Juan, 1975-, et al.
(author)
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Green qualities in transport efficient cities
- 2013
-
Conference paper (peer-reviewed)abstract
- A main stream postulation in urban planning is that denser cities enhance energy efficiency and city attractiveness by offering shorter travel distances and a variety of functions that reduce car traffic and facilitate walking, biking and public transit. However, the complex links that exist between city density and its implications for energy efficiency and city attractiveness call for a better understanding of the factors that influence an integrated planning of regional cities. In this context, one factor that could be of interest to study is that of green urban open spaces such as green wedges, parks, wetland areas, shore lines, gardens, cemeteries, golf courses and treed boulevards that provide protection for biodiversity as well as many other valuable ecosystem services. However, discussions on developing compact, energy efficient and attractive regional cities are raising conflicts with policies that aim at conserving green urban open spaces. The aim of this paper is to increase knowledge on and contribute to the development of strategies and measures to best manage the conflicts that are emerging between developing dense, low traffic cities and planning for good quality, valuable and accessible green urban open spaces. To achieve this aim, a conflict mapping exercise is being carried out by identifying, reviewing and assessing literature on the subject. In parallel, relevant examples are being analyzed and seminars, workshops and interviews are taking place with actors of the Stockholm city region. Obtained results are conflicting perceptions on the role that green urban open spaces should play in city development, conflicts of governance and collaboration, conflicts between different objectives at varying decision making scales, and significant limitations to integrated and systemic socio-ecological understandings of the city region and its changing values. The conflict mapping exercise is a valuable starting point to identify the proposal of alternative land use practices, discuss how these can be assessed, and define measures that can enhance compactness, energy efficiency and green qualities in city region planning and development.
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| 13. |
- Hussain, Ahmed, 1985, et al.
(author)
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MIMO OTA Testing of a Communication System Using SDRs in a Reverberation Chamber
- 2015
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In: IEEE Antennas and Propagation Magazine. - : Institute of Electrical and Electronics Engineers (IEEE). - 1045-9243. ; 57:2, s. 44-53
-
Journal article (peer-reviewed)abstract
- This paper presents a study of measuring complete over-the-air (OTA) system performance of software-defined radios (SDRs) such as the Universal Software Radio Peripheral (USRP) developed by Ettus Research and National Instruments. We use the reverberation chamber (RC) for measuring the OTA system throughput (TPUT) when the USRP is configured in single-input single-output, 1 x 2 single-input multiple-output, 2 x 1 multiple-input single-output, and 2 x 2 multiple-input multiple-output. The measured and simulated results are compared. The theoretical model of an ideal threshold receiver is used to simulate the OTA TPUT of the USRP. The total radiated power and total isotropic sensitivity of the USRP is also measured inside the RC. According to the authors' knowledge, complete active system performance measurements of USRPs in an RC are being published for the first time.
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| 14. |
- Iovino, Mariangela, et al.
(author)
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The novel MAPT mutation K298E: mechanisms of mutant tau toxicity, brain pathology and tau expression in induced fibroblast-derived neurons
- 2014
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In: Acta Neuropathologica. - : Springer Science and Business Media LLC. - 1432-0533 .- 0001-6322. ; 127:2, s. 283-295
-
Journal article (peer-reviewed)abstract
- Frontotemporal lobar degeneration (FTLD) consists of a group of neurodegenerative diseases characterized by behavioural and executive impairment, language disorders and motor dysfunction. About 20-30 % of cases are inherited in a dominant manner. Mutations in the microtubule-associated protein tau gene (MAPT) cause frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17T). Here we report a novel MAPT mutation (K298E) in exon 10 in a patient with FTDP-17T. Neuropathological studies of post-mortem brain showed widespread neuronal loss and gliosis and abundant deposition of hyperphosphorylated tau in neurons and glia. Molecular studies demonstrated that the K298E mutation affects both protein function and alternative mRNA splicing. Fibroblasts from a skin biopsy of the proband taken at post-mortem were directly induced into neurons (iNs) and expressed both 3-repeat and 4-repeat tau isoforms. As well as contributing new knowledge on MAPT mutations in FTDP-17T, this is the first example of the successful generation of iNs from skin cells retrieved post-mortem.
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| 15. |
- Iqbal, Azhar, et al.
(author)
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Photoluminescence study of as-grown vertically standing wurtzite InP nanowire ensembles.
- 2013
-
In: Nanotechnology. - : IOP Publishing. - 0957-4484 .- 1361-6528. ; 24:11
-
Journal article (peer-reviewed)abstract
- We demonstrate a method that enables the study of photoluminescence of as-grown nanowires on a native substrate by non-destructively suppressing the contribution of substrate photoluminescence. This is achieved by using polarized photo-excitation and photoluminescence and by making an appropriate choice of incident angle of both excitation beam and photoluminescence collection direction. Using T-polarized excitation at a wavelength of 488 nm at an incident angle of ∼70° we suppress the InP substrate photoluminescence relative to that of the InP nanowires by about 80 times. Consequently, the photoluminescence originating from the nanowires becomes comparable to and easily distinguishable from the substrate photoluminescence. The measured photoluminescence, which peaks at photon energies of ∼1.35 eV and ∼1.49 eV, corresponds to the InP substrate with zinc-blende crystal structure and to the InP nanowires with wurtzite crystal structure, respectively. The photoluminescence quantum yield of the nanowires was found to be ∼20 times lower than that of the InP substrate. The nanowires, grown vertically in a random ensemble, neither exhibit substantial emission polarization selectivity to the axis of the nanowires nor follow excitation polarization preferences observed previously for a single nanowire.
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| 16. |
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| 17. |
- Khan, Suleman, et al.
(author)
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Design Optimization of the Tau Haptic Device
- 2011
-
In: ICUMT. - : IEEE. - 9781457706820 ; , s. 1-8
-
Conference paper (peer-reviewed)abstract
- The work presented in this paper is motivated by the use of haptics in medical simulation, particularly simulation of surgical procedures in hard tissue such as bone structures. In this context, characteristics such as motion, stiffness, workspace-to-footprint ratio, and low inertia are key factors in the design of a haptic device. This paper introduces a procedure for design optimization of haptic devices based on a hybrid mechanism. For design optimization, performance indices such as workspace volume, kinematic isotropy and static torque requirements indices are defined. A new multi-criteria objective optimization (MOO) function is introduced to define the optimization problem. Multi-objective algorithms are used to solve this optimization problem using the defined objective function. Furthermore sensitivity analysis of the performance indices against each design parameter is presented as a basis for selecting a final set of design parameters to develop a prototype. Finally, a CAD model and prototype of the device is developed based on the simulation results.
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| 18. |
- Lastouski, Aliaksei, et al.
(author)
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Churches in the 2020 elections and political protests in Belarus : raising voices at the time of uncertainties and turmoil
- 2024
-
In: Journal of Contemporary Religion. - : Taylor & Francis Group. - 1353-7903 .- 1469-9419. ; 39:2, s. 347-359
-
Journal article (peer-reviewed)abstract
- In 2020, the religious factor turned out to gain importance to both protest mobilizations and to government repression in Belarus, where the initiatives of religious groups had fostered collective action in the state system that was punitive against any dissent. This happened for the first time in the country, which had been affected by the legacies of Soviet anti-religious policies. The forms of protest that churches could suggest fitted neatly into the non-democratic settings of Belarus, providing a necessary opportunity structure for otherwise forbidden mobilizations. Analyzing the attitudes of the Orthodox, Catholic, and Protestant Churches toward the events of 2020 in Belarus, this research note discusses why their social contract with the authoritarian regime was broken. We argue that the churches' stance and the role they played at a time of political turmoil confirmed their status as influential non-state actors who are capable of having their say in the rough circumstances of an authoritarian and repressive political regime. At the same time, it has also confirmed the limits of the authoritarian state to influence religious institutions and the growing opportunities for clergy and laypeople from these institutions to have a common say on important issues of moral and ethical dimensions, inspired by Christian principles and values.
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| 19. |
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| 20. |
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| 21. |
- Toth, Emese, et al.
(author)
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History of Previous Fracture and Imminent Fracture Risk in Swedish Women Aged 55 to 90 Years Presenting With a Fragility Fracture
- 2020
-
In: Journal of Bone and Mineral Research. - : Wiley. - 0884-0431 .- 1523-4681. ; 35:5, s. 861-868
-
Journal article (peer-reviewed)abstract
- The term “fracture cascade” refers to the sequence of fragility fractures resulting from the increased fracture risk that occurs with aging and following fractures. Here, we evaluate the sequence of previous fractures in women aged 55 to 90 years presenting with a fragility fracture and subsequent (12 to 24 months) fracture incidence. In this retrospective, observational study, women aged 55 to 90 years with an “index” fragility fracture in 2013 were identified from Swedish national registries. A history of previous fractures (2001 to 2012) and osteoporosis treatment was used to characterize fracture cascade patterns. Cumulative incidence of new fractures within 12 to 24 months following the index fracture, based on index fracture type and age, were used to describe the risk of subsequent fractures. A total of 35,146 women with a mean age of 73.8 years were included (7180 hip, 2786 clinical vertebral, and 25,180 nonhip/nonvertebral [NHNV] index fractures); 38% of women with hip, 38% with clinical vertebral, and 25% with NHNV index fractures had one or more previous fractures. Across all index fracture types, the proportion of women with any previous fracture increased with age; 34% to 46% of index hip or clinical vertebral fractures in women ≥70 years were not their first fracture. Following any index fracture, cumulative incidence of a new fracture over 24 months was over 11% (index clinical vertebral 18%; index hip 14%). Osteoporosis treatment rates were low both in patients with (27%) and without (18%) a previous fracture. These descriptive data demonstrate that almost one-third of women aged 55 to 90 years suffering a new fracture have had a previous fragility fracture. Fracture location influences incidence and type of subsequent fracture during the 24 months following a fragility fracture, with clinical vertebral fractures carrying the greatest imminent fracture risk. These data highlight the clinical impact and need for early, effective treatment soon after any fragility fracture.
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| 22. |
- Wang, F. M., et al.
(author)
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Global blue carbon accumulation in tidal wetlands increases with climate change
- 2021
-
In: National Science Review. - : Oxford University Press (OUP). - 2095-5138 .- 2053-714X. ; 8:9
-
Journal article (peer-reviewed)abstract
- Coastal tidal wetlands produce and accumulate significant amounts of organic carbon (C) that help to mitigate climate change. However, previous data limitations have prevented a robust evaluation of the global rates and mechanisms driving C accumulation. Here, we go beyond recent soil C stock estimates to reveal global tidal wetland C accumulation and predict changes under relative sea level rise, temperature and precipitation. We use data from literature study sites and our new observations spanning wide latitudinal gradients and 20 countries. Globally, tidal wetlands accumulate 53.65 (95%CI: 48.52-59.01) Tg C yr(-1), which is similar to 30% of the organic C buried on the ocean floor. Modeling based on current climatic drivers and under projected emissions scenarios revealed a net increase in the global C accumulation by 2100. This rapid increase is driven by sea level rise in tidal marshes, and higher temperature and precipitation in mangroves. Countries with large areas of coastal wetlands, like Indonesia and Mexico, are more susceptible to tidal wetland C losses under climate change, while regions such as Australia, Brazil, the USA and China will experience a significant C accumulation increase under all projected scenarios.
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| 23. |
- Wang, Fang, et al.
(author)
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Research on Injury Prevention Effectiveness of Cyclist Helmet in Typical Road Cycling Accident Scenarios
- 2024
-
In: Jixie Gongcheng Xuebao/Journal of Mechanical Engineering. - : Chinese Mechanical Engineering Society. - 0577-6686. ; 60:8, s. 256-270
-
Journal article (peer-reviewed)abstract
- In intense and fast road cycling races, various accidents pose a great threat to cyclist safety. There is a lack of in-depth research on helmet performance and cyclist head injury in road cycling races. In this paper, based on collecting and summarizing the typical accident scenarios of road cycling races, models of road bicycle, anthropologic characteristics of cyclists and helmets are constructed with experimental and computational methods, and the head injury protection performance of helmets and cyclist's head injury response in typical accident scenarios are comprehensively analyzed and evaluated. The results show that the helmet can play a significant injury protection effect, but serious head injury may still occur in some scenarios; different helmets have significant differences in cyclist's head injury protection, and there is no direct correlation with the price. There are significant differences in the effectiveness of helmets for head injury protection among cyclists of different body sizes, with the 50th percentile adult men having the lowest peak kinematic response and injury risk, the 5th percentile adult women having the highest predicted values for all injury criteria, and at least 55% of female cyclists having a significant risk of skull fracture and severe brain injury. None of the accident boundary parameters examined in this study (accident speed, friction coefficient, and slope) had a significant effect on cyclist head injury in the accident scenarios; the Union cycliste Internationale stipulates that helmets may not be worn five kilometers from the end of the climb, while this study recommends cyclists wear safety helmets throughout the road cycling races. This study will provide a reference for the design of safety helmets for road cycling races, as well as data to support the improvement of road cycling race rules.
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| 24. |
- Ali, Nazakat, et al.
(author)
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Modeling and safety analysis for collaborative safety-critical systems using hierarchical colored Petri nets
- 2024
-
In: Journal of Systems and Software. - : Elsevier Inc.. - 0164-1212 .- 1873-1228. ; 210
-
Journal article (peer-reviewed)abstract
- Context: Collaborative systems enable multiple independent systems to work together towards a common goal. These systems can include both human-system and system-system interactions and can be found in a variety of settings, including smart manufacturing, smart transportation, and healthcare. Safety is an important consideration for collaborative systems because one system's failure can significantly impact the overall system performance and adversely affect other systems, humans or the environment. Goal: Fail-safe mechanisms for safety-critical systems are designed to bring the system to a safe state in case of a failure in the sensors or actuators. However, a collaborative safety-critical system must do better and be safe-operational, for e.g., a failure of one of the members in a platoon of vehicles in the middle of a highway is not acceptable. Thus, failures must be compensated, and compliance with safety constraints must be ensured even under faults or failures of constituent systems. Method: In this paper, we model and analyze safety for collaborative safety-critical systems using hierarchical Coloured Petri nets (CPN). We used an automated Human Rescue Robot System (HRRS) as a case study, modeled it using hierarchical CPN, and injected some specified failures to check and confirm the safe behavior in case of unexpected scenarios. Results: The system behavior was observed after injecting three types of failures in constituent systems, and then safety mechanisms were applied to mitigate the effect of these failures. After applying safety mechanisms, the HRRS system's overall behavior was again observed both in terms of verification and validation, and the simulated results show that all the identified failures were mitigated and HRRS completed its mission. Conclusion: It was found that the approach based on formal methods (CPN modeling) can be used for the safety analysis, modeling, validation, and verification of collaborative safety-critical systems like HRRS. The hierarchical CPN provides a rigorous way of modeling to implement complex collaborative systems.
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| 25. |
- Anrup, Roland
(author)
-
La "plebe" en una sociedad de "todos los colores" : la construcción de un imaginario socila y político en la colonia tardía en Cartagena y Guyaquil
- 2006
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In: Cahiers du monde Hispanique et Luso-Bresilien. - 0008-0152. ; 84, s. 93-126
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Journal article (peer-reviewed)abstract
- In the urban regions of Guayaquil and Cartagena, strongly marked by the presence of slavery, the "castas", slaves and freedmen (whether coloured or not), compose the essential of the "plebs" who keep worrying the "decent people". After the Independence, the term "people" imposes itself, with a certain ambiguity. If, on one side, it is exalted as the "sovereign people" in the elites' speeches, on the other side, its manifestations of resistance and revolt turn these same people into the heirs of ancient "plebs".
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| 26. |
- Anrup, Roland, 1952
(author)
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La Virgen María en la imaginería iberoamericana
- 1998
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In: Medina, M. C. (ed). América Latina : y las mujeres qué?. - Göteborg : Red Haina ; Instituto Iberoamericano, Universidad de Gotemburgo. - 9163067323 ; , s. 85-105
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Book chapter (other academic/artistic)
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| 27. |
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| 28. |
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| 29. |
- Bensow, Rickard, 1972, et al.
(author)
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Using a PANS Simulation Approach for the Transient Flow around the Japan Bulk Carrier
- 2018
-
Conference paper (other academic/artistic)abstract
- In this study, a PANS, Partially averaged Navier-Stokes, modelling approach developed based on the k − ω turbulence model has been applied to the flow around the Japan Bulk Carrier. Three different meshes has been employed for a fixed physical resolution for the PANS modelling. The results are encouraging, with small scale flow dynamics being allowed to develop on reasonably small mesh sizes, but more studies are required before reliable predictive simulations can be performed.
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| 30. |
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| 31. |
- Di Bari, Chiara, et al.
(author)
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Laccase-modified gold nanorods for electrocatalytic reduction of oxygen
- 2016
-
In: Bioelectrochemistry. - : Elsevier. - 1567-5394 .- 1878-562X. ; 107, s. 30-36
-
Journal article (peer-reviewed)abstract
- The multicopper oxidase Trametes hirsuta laccase (ThLc) served as a bioelectrocatalyst on nanostructured cathodes. Nanostructuring was provided by gold nanorods (AuNRs), which were characterized and covalently attached to electrodes made of low-d. graphite. The nanostructured electrode was the scaffold for covalent and oriented attachment of ThLc. The bioelectrocatalytic currents measured for oxygen redn. were as high as 0.5 mA/cm2 and 0.7 mA/cm2, which were recorded under direct and mediated electron transfer regimes, resp. The exptl. data were fitted to math. models showing that when the O2 is bioelectroreduced at high rotation speed of the electrode the heterogeneous electron transfer step is the rate-liming stage. The electrochem. measurement hints a wider population of non-optimally wired laccases than previously reported for 5-8 nm size Au nanoparticle-modified electrode, which could be due to a larger size of the AuNRs when compared to the laccases as well as their different crystal facets.
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| 32. |
- Ehrnström, Mats
(author)
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Uniqueness of steady symmetric deep-water waves with vorticity
- 2005
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In: Journal of Nonlinear Mathematical Physics. - : Springer Science and Business Media LLC. - 1402-9251 .- 1776-0852. ; 12:1, s. 27-30
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Journal article (peer-reviewed)abstract
- Given a steady and symmetric deep-water wave we prove that the surface profile and the vorticity distribution determine the wave motion completely throughout the fluid.
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| 33. |
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| 34. |
- Hua, Håkan, et al.
(author)
-
Quality of life and self-perceived hearing handicap in employees with mild-moderate hearing impairment
- 2013
-
Conference paper (peer-reviewed)abstract
- Objectives: The aims were to compare health related quality of life (HRQOL) between two groups of employees with normal hearing and hearing impairment (HI) and the results were compared to a normative population. The second aim was to examine self-reported hearing handicap in employees with HI.Design: Data collection occurred in two separate sessions. A validated Swedish version of the Short form-36 (SF-36) was employed to determine HRQOL and The Hearing Handicap Inventory for Adults (HHIA) was used to measure self-perceived hearing handicap.Study Sample: The study sample consisted of hearing-impaired (n = 20) and normally hearing (n = 20) participants. The normative sample comprised of 597 matched respondents.Results: Hearing-impaired employees do not report significantly different HRQOL in comparison with a normative population, nor do they report significantly different HRQOL than their normally hearing peers except in physical functioning (p = 0.04). Results from the HHIA showed mild self-perceived hearing handicap.Conclusions: Employees with mild-moderate HI report good HRQOL and mild self-perceived hearing handicap. However, physical health can be affected even at a mild-moderate HI. This study supports previous literature that HA use, having a job and severity of HI may play a vital role for this group’s well-being.
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| 35. |
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| 36. |
- Iqbal, Asifa, et al.
(author)
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Does crime in parks affect apartment prices?
- 2015
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In: Journal of Scandinavian Studies in Criminology and Crime Prevention. - : Informa UK Limited. - 1404-3858 .- 1651-2340. ; 16:1, s. 97-121
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Journal article (peer-reviewed)abstract
- A park is a desirable feature when people are purchasing a property. Buyers are ready to pay more for properties surrounded by natural amenities, such as a pleasant park. However, if a park is targeted by crime and disorder, then it may have a negative effect on people's appraisal. The aim of this study is to reach a better understanding of how parks and crime rates affect housing prices taking into account residential properties and parks type. Stockholm, the capital of Sweden, is used as the case study. The methodology has two stages. An extensive field work was performed in a selected number of parks to help characterize the parks in Stockholm. This information was gathered with secondary data about parks using Geographic Information System. This pre-assessment was later followed by the analysis of 2008s apartment sales using hedonic modelling to assess the effect of parks alone and in combination with crime rates. Results suggest that the effect of parks on prices vary by park type (increased with, e.g. features of cultural and national interest and decreased with ball games or boating facilities) while an aggregated measure of parks lowers overall apartment prices. More interestingly, findings show that the price of apartments tends to be discounted in areas where parks have relatively high rates of violence and vandalism.
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| 37. |
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Ireland and the North
- 2019
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Editorial collection (peer-reviewed)abstract
- Ireland and the North is an edited collection engaging with the relationship between Ireland and the Nordic countries. As a spatial and geographical point of reference for the formation of political and cultural identities in Ireland, the idea of 'the North' encourages the identification of overlooked connections between Ireland and the Nordic countries, which, like Ireland, are also small nation states on the periphery of Europe. Importantly, the book employs a double conceptualisation of 'the North' to include Northern Ireland. Moving beyond the nation state as a key framework for analysis of human activity, this collection engages with the transnational and transcultural in a mapping of connectivity and exchange. Chapters are drawn from a wide-ranging field of study that includes art history, literary history and theory, archaeology, antiquarianism, and media studies in addition to political analysis. Relationships explored are imaginary and material exchanges, civic and personal linkages, literary adaptation and appropriation, transfers of cultural artefacts, political institutions and ideas. With three sections on Material Culture, Political Culture and Print Culture, the book moves beyond the predominant literary paradigm in Irish Studies to make a significant contribution to the expanding and developing field.
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| 38. |
- Jaarsma, Tiny, et al.
(author)
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Sexual dysfunction in heart failure patients
- 2014
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In: Current Heart Failure Reports. - : Springer Science and Business Media LLC. - 1546-9530 .- 1546-9549. ; 11:3, s. 330-336
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Journal article (peer-reviewed)abstract
- Heart failure has a severe impact on different aspects of a patient’s life, including sexual function. Sexual problems are common in heart failure (HF) patients, both in men and women, and are not always adequately addressed and treated in the current health care system. Several factors have been described to be related to sexual problems, such as activity intolerance, psychological factors, physiological factors, cardiac medications, recreational habits and co-morbidity. The current review summarizes knowledge that can help clinicians treat sexual dysfunction in HF patients. After a good assessment, several steps are advised, including improving HF and co-morbid conditions, discussing psychosocial problems, worries and misunderstandings, managing risk factors and considering PDE-5 inhibitors or other libido enhancing agents.
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| 39. |
- Javaher, P., et al.
(author)
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Genetic Screening in Europe
- 2010
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In: Public Health Genomics. - : S. Karger AG. - 1662-8063 .- 1662-4246. ; 13:7-8, s. 524-537
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Journal article (peer-reviewed)abstract
- Genetic screening has been defined as any kind of test performed systematically for the early detection or exclusion of a genetic disease, genetic predisposition or resistance to a disease, or to determine whether a person carries a gene variant that may produce disease in his or her offspring. In comparison to 'genetic testing', the term 'genetic screening' should be reserved for the explicit and systematic application of a diagnostic genetic test across a whole population of asymptomatic people (population screening) or a subset of a population such as pregnant women (prenatal/antenatal screening) or newborn infants (neonatal screening). This survey intends to present the current (2006-2008) status of genetic screening and the organization of genetic screening programmes in selected European countries as a background for future attempts to harmonize standards and procedures of genetic screening, an explicit aim of the European Network of Excellence, EuroGentest (www.eurogentest.org). Our report builds on the first comprehensive assessment of genetic screening programmes in Germany by the European Society of Human Genetics, starting with a workshop of experts in 1999, the production of background documentation in 2000, and a final report in 2003. Copyright (C) 2010 S. Karger AG, Basel
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| 40. |
- Khamnei, Hossein Jabbari, et al.
(author)
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Parameter Estimation of the Exponentiated Pareto Distribution Using Ranked Set Sampling and Simple Random Sampling
- 2022
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In: Axioms. - : MDPI. - 2075-1680. ; 11:6, s. 1-9
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Journal article (peer-reviewed)abstract
- In this paper, we have considered that ranked set sampling is able to estimate the parameters of exponentiated Pareto distribution. The method with which the maximum likelihood estimators for the parameters of exponentiated Pareto distribution is studied is numerical since there is no presence or possibility of a closed-form at the hands of estimators or any other intellectual. The numerical approach is a well-suited one for this study as there has been struggles in achieving it with any other technique. In order to compare the different sampling methods, simulation studies are performed as the main technique. As for the illustrative purposes, analysis of a simulated dataset is desired for the objective of the presentation. The conclusion that we can reach based on these is that the estimators based on the ranked set sample have far better efficiency than the simple random sample at the same sample size.
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| 41. |
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| 42. |
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| 43. |
- Munkvold, Bodil Karoline Ravn, et al.
(author)
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Variations in the management of diffuse low-grade gliomas : A Scandinavian multicenter study
- 2021
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In: Neuro-Oncology Practice. - : Oxford University Press. - 2054-2577 .- 2054-2585. ; 8:6, s. 706-717
-
Journal article (peer-reviewed)abstract
- Background. Early extensive surgery is a cornerstone in treatment of diffuse low-grade gliomas (DLGGs), and an additional survival benefit has been demonstrated from early radiochemotherapy in selected "high-risk" patients. Still, there are a number of controversies related to DLGG management. The objective of this multicenter population-based cohort study was to explore potential variations in diagnostic work-up and treatment between treating centers in 2 Scandinavian countries with similar public health care systems.Methods. Patients screened for inclusion underwent primary surgery of a histopathologically verified diffuse WHO grade II glioma in the time period 2012 through 2017. Clinical and radiological data were collected from medical records and locally conducted research projects, whereupon differences between countries and inter-hospital variations were explored.Results. A total of 642 patients were included (male:female ratio 1:4), and annual age-standardized incidence rates were 0.9 and 0.8 per 100 000 in Norway and Sweden, respectively. Considerable inter-hospital variations were observed in preoperative work-up, tumor diagnostics, surgical strategies, techniques for intraoperative guidance, as well as choice and timing of adjuvant therapy.Conclusions. Despite geographical population-based case selection, similar health care organizations, and existing guidelines, there were considerable variations in DLGG management. While some can be attributed to differences in clinical implementation of current scientific knowledge, some of the observed inter-hospital variations reflect controversies related to diagnostics and treatment. Quantification of these disparities renders possible identification of treatment patterns associated with better or worse outcomes and may thus represent a step toward more uniform evidence-based care.
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| 44. |
- Nivorozhkin, Anton, 1978
(author)
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An evaluation of government-sponsored vocational training programmes for the unemployed in urban Russia
- 2005
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In: CAMBRIDGE JOURNAL OF ECONOMICS. - : Oxford University Press (OUP). - 0309-166X .- 1464-3545. ; 29:6, s. 1053-1072
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Journal article (peer-reviewed)abstract
- This is the first study on the effects of active labour market programs such as training in Russia. We use the data from the official unemployment register combined with information from the follow-up survey in a large industrial city in the year 2000. The method of propensity score matching was applied to learn whether participation in the training programmes increased the monthly salaries of participants. The findings suggest that individuals tend to benefit from the participation in the training programmes. However, one year later, this effect disappeared.
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| 45. |
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| 46. |
- Ratynskaia, Svetlana V., et al.
(author)
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In situ dust detection in fusion devices
- 2008
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In: Plasma Physics and Controlled Fusion. - : IOP Publishing. - 0741-3335 .- 1361-6587. ; 50:12, s. 124046-
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Journal article (peer-reviewed)abstract
- Diagnostics for monitoring dust in tokamaks during plasma discharges, both established and currently being developed, are discussed with a focus on the range of dust parameters they can detect. Visible imaging can currently be used for dust particles bigger than a few mu m and velocities below 1 km s(-1). The dust impact ionization phenomenon can be used for the detection of particles with velocities above a few km s(-1). Laser light scattering gives an insight into the amount of sub-micron dust. Aerogels, light porous materials, allow capturing of dust particles without destroying them and determining their velocity. Other methods include the microbalance technique and electrostatic dust detectors. A recent suggestion to use the effects of dust on collective scattering for diagnostic purposes is also discussed.
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| 47. |
- Rawat, P.K., et al.
(author)
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Exploration of Zn Resonance Levels and Thermoelectric Properties in I-Doped PbTe with ZnTe Nanostructures
- 2014
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In: ACS Applied Materials and Interfaces. - : American Chemical Society. - 1944-8244 .- 1944-8252. ; 6:6, s. 3995-4004
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Journal article (peer-reviewed)abstract
- Motivated by the theoretically predicted Zn resonant states in the conduction band of PbTe, in the present work, we investigated the effect of Zn substitution on the thermoelectric properties in I-doped n-type PbTe. The room temperature thermopower values show good agreement with the theoretical Pisarenko plot of PbTe up to a carrier concentration of 4.17 X 10(19) cm(-3); thus, the presence of Zn resonance levels is not observed. Because of the low solubility of Zn in PbTe, a second phase of coherent ZnTe nanostructures is observed within the PbTe host matrix, which is found to reduce the lattice thermal conductivity. The reduced lattice thermal conductivity in PbTe by ZnTe nanostructures leads to notable enhancement in the figure of merit with a maximum value of 1.35 at 650 K. In contrast to the recent literature, the carrier mobility is not found to be affected by the band offset between ZnTe nanostructures and PbTe. This is explained by the quantum tunneling of the charge carrier through the narrow offset barrier and depletion width and coherent nature of the interface boundary between the two phases, i.e., ZnTe and PbTe.
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| 48. |
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| 49. |
- Saha, Ranjan, et al.
(author)
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Aerodynamic implications of reduced vane count
- 2015
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In: Proceedings of the ASME Turbo Expo. - : ASME Press. - 9780791856635
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Conference paper (peer-reviewed)abstract
- Given the shortage of fossil fuels and the growing greenhouse effect, one strive in modern gas turbines is to make maximum usage of the burnt fuel. By reducing the number of vanes or blades and thereby increasing the loading per vane (or blade) it is possible to spend less cooling air, which will have a positive impact on the combined cycle efficiency. It also reduces the number of components and usage of metal and thereby also the cost of the engine. These savings should be achieved without any efficiency deficit in aerodynamic efficiency. Based on the fact, aerodynamic investigations were performed to see the aerodynamic implications of reduced vane number in a transonic annular sector cascade. The number of new nozzle guide vane was reduced with 24% compared to a previous design with higher vane count. The investigated vanes were two typical high pressure gas turbine vanes. Results regarding the loading indicated an expected increase with the reduced vane case. The minimum static pressure at the suction side is lower and at an earlier location for the reduced vane case and therefore, an extension of the trailing edge deceleration zone is observed for the reduced vane case. Results regarding losses indicate that even though the losses produced per vane significantly increases for the reduced vane case, a comparison of mass averaged losses between the reduced vane case and previous vane case show similar spanwise loss distributions. Assessing results leads to a conclusion that the reduction of the number of vanes in the first stage seems to be a useful method to save cooling flow as well as material costs without any significant deficit in overall efficiency.
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| 50. |
- Uhr, Christian
(author)
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Leadership Ideals as Barriers for Efficient Collaboration During Emergencies and Disasters
- 2017
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In: Journal of Contingencies and Crisis Management. - : Wiley. - 0966-0879. ; 25:4, s. 301-312
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Journal article (peer-reviewed)abstract
- In an emergency or disaster situation, it is likely that a conglomerate of societal resources will respond to various needs. In such a multi-organizational setting, collaboration becomes necessary. Empirical findings suggest that collaboration can be very problematical and this paper argues that a possible explanation can be found in intra-organizational leadership ideals, dysfunctional in a collaborative context. In order to facilitate a principal discussion, an analytical framework for discussing leadership and collaboration is suggested. Moreover, literature findings suggesting individual qualities facilitating collaboration are presented. Three leadership archetypes are used to problematize intra-organizational ideals in inter-organizational settings. It is suggested that more attention must be paid to qualities enabling individuals to operate simultaneously in different, and partly conflicting, management contexts.
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