| 1. |
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| 2. |
- Farnebo, Simon, 1972-, et al.
(författare)
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Hand surgery in Sweden
- 2017
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Ingår i: Journal of Hand Surgery, European Volume. - : SAGE PUBLICATIONS LTD. - 1753-1934 .- 2043-6289. ; 42:5, s. 537-539
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
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| 3. |
- Farnebo, Simon, et al.
(författare)
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Hyperaemic changes in forearm skin perfusion and RBC concentration after increasing occlusion times
- 2010
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Ingår i: MICROVASCULAR RESEARCH. - : Elsevier Science B.V., Amsterdam. - 0026-2862. ; 80:3, s. 412-416
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Tidskriftsartikel (refereegranskat)abstract
- Tissue occlusion and the hyperaemic response upon reperfusion can be used as a tool to assess microvascular function in various vascular diseases. Currently, laser Doppler flowmetry (LDF) is applied most often to measure hyperaemic responses. In this study, we have applied tissue viability imaging (TiVi) and LDF to measure the change in red blood cell concentration and perfusion in the skin after occlusions of the forearm with increasing duration. We have found that there is a strong correlation between the changes in perfusion and red blood cell (RBC) concentration during post-occlusive hyperaemia (perfusion: r = 0.80; RBC concentration: r = 0.94). This correlation increases with longer occlusion durations (1, 5 and 10 min). Furthermore, for both perfusion and RBC concentration, the maximum responses (perfusion: r(2) = 0.59; RBC concentration: r(2) = 0.78) and the recovery times (perfusion: r(2) = 0.62; RBC concentration: r(2) = 0.91) increase linearly with the duration of the occlusion. Maximum responses and recovery times were more reproducible for RBC concentration (as measured with TiVi) than for perfusion (as measured with LDF). These results show that perfusion and RBC concentration are related during post-occlusive hyperaemia and that TiVi can be used as a tool in the assessment of hyperaemic responses that has advantages in terms of reproducibility, sensitivity and ease of use.
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| 4. |
- Fleyeh, Hasan, et al.
(författare)
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An adaptive approach to detect warning traffic signs using som and windowed hough transform
- 2011
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Ingår i: IASTED. - Krete. ; , s. 195-202
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Konferensbidrag (refereegranskat)abstract
- Warning traffic signs represent an important group of traffic signs which indicate danger for road users. Detecting this group in good time may be helpful to avoid many fatal accidents. This paper presents a new approach to detecting warning traffic signs which is based on color segmentation using Self Organizing Maps and windowed Hough Transform. The proposed system is a standalone and adaptive which means that it works without any kind of training. This is due to the fact that color segmentation using SOM employs 1% of the image under investigation for the training and Hough transform is invoked to detect the shape of this group of traffic signs. Experiments conducted to check the robustness of this approach indicated that 95.6% of the traffic signs invoked for this test were successfully detected. This test was carried out under a wide range of environmental conditions and in different European countries.
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| 5. |
- Fleyeh, Hasan, et al.
(författare)
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Benchmark Evaluation of HOG Descriptors as Features for Classification of Traffic Signs
- 2013
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The purpose of this paper is to analyze the performance of the Histograms of Oriented Gradients (HOG) as descriptors for traffic signs recognition. The test dataset consists of speed limit traffic signs because of their high inter-class similarities. HOG features of speed limit signs, which were extracted from different traffic scenes, were computed and a Gentle AdaBoost classifier was invoked to evaluate the different features. The performance of HOG was tested with a dataset consisting of 1727 Swedish speed signs images. Different numbers of HOG features per descriptor, ranging from 36 features up 396 features, were computed for each traffic sign in the benchmark testing. The results show that HOG features perform high classification rate as the Gentle AdaBoost classification rate was 99.42%, and they are suitable to real time traffic sign recognition. However, it is found that changing the number of orientation bins has insignificant effect on the classification rate. In addition to this, HOG descriptors are not robust with respect to sign orientation.
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| 6. |
- Fleyeh, Hasan, et al.
(författare)
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Classification with NormalBoost- Case Study Traffic Sign Classification
- 2012
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Ingår i: Journal of Intelligent Systems. - Berlin : De Gruyter. - 2191-026X .- 0334-1860. ; 21:1, s. 25-43
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Tidskriftsartikel (refereegranskat)abstract
- NormalBoost is a new boosting algorithm which is capable of classifying a multi-dimensional binary class dataset. It adaptively combines several weak classifiers to form a strong classifier. Unlike many boosting algorithms which have high computation and memory complexities, NormalBoost is capable of classification with low complexity. The purpose of this paper is to present NormalBoost as a framework which establishes a platform to solve classification problems. The approach was tested with a dataset which was extracted automatically from real-world traffic sign images. The dataset contains both images of traffic sign borders and speed limit pictograms. This framework involves the computation of Haar-like features of these images and then employs the NormalBoost classifier to classify these traffic signs. The total number of images which were classified was 6500 binary images. A -fold validation was invoked to check the validity of the classification which resulted in a classification rate of 98.4% and 98.9% being achieved for these two databases. This framework is distinguished by its invariance to in-plane rotation of the images under consideration. Experiments show that the classification rate remains almost constant when traffic sign images with different angles of rotations were tested.
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| 7. |
- Govindarajan, Venkatesh, 1972-
(författare)
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Critique of selected peer-reviewed publications on applied social life cycle assessment : Focus on cases from developing countries
- 2019
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Ingår i: Clean Technologies and Environmental Policy. - : Springer Berlin/Heidelberg. - 1618-954X .- 1618-9558. ; 21:2, s. 413-430
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Tidskriftsartikel (refereegranskat)abstract
- The social aspect of sustainable and ‘clean’ production/manufacturing technologies is researched and understood by means of Social Life Cycle Assessment (SLCA), a Life Cycle Sustainability Assessment (LCSA) tool, which is still in its infancy. In this paper, a search for all peer-reviewed publications on applied Social LCA, which have appeared in scientific journals, between O’Brien et al (1996) and the latest one at the time of writing (April 2018), was carried out, using Scopus as the repository and using “S-LCA” OR “SLCA” OR “Social LCA” OR “Social Life Cycle Assessment” as search-phrases in title, abstract and keywords of publications, separately. Overall, 213 publications were unearthed, and the trend shows that there has been a near-exponential increase over time. A little over 55% of these publications – 121 to be precise - were applications of S-LCA – often in combination with environmental-LCA and life cycle costing analysis, in an LCSA. This paper discusses the contributions of a selected subset of these 121 publications to the body of S-LCA knowledge, with the focus being restricted to applications in developing and transition economies of the world, on the premise that there is a more urgent need to understand social aspects of production and manufacturing in these parts of the world. A SWOT analysis of S-LCA has been carried out towards the end. There is a consensus among many researchers that while LCC and E-LCA have matured a lot over time, S-LCA, the newest of the trio, is evolving slowly to become a harmonised tool which can serve as an effective complement to the aforesaid two, in life cycle sustainability assessments of products and processes in industry.
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| 8. |
- Holmer, M, et al.
(författare)
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Associations between subcutaneous adipocyte hypertrophy and nonalcoholic fatty liver disease
- 2022
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Ingår i: Scientific reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 12:1, s. 20519-
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Tidskriftsartikel (refereegranskat)abstract
- Adipocyte hypertrophy and expression of adipokines in subcutaneous adipose tissue (SAT) have been linked to steatosis, nonalcoholic steatohepatitis (NASH) and fibrosis in morbidly obese (BMI ≥ 40 kg/m2) subjects. It is unknown if this is also true for subjects with NAFLD with lesser degrees of obesity (BMI < 35 kg/m2). Thirty-two subjects with biopsy-proven NAFLD and 15 non-diabetic controls matched for BMI underwent fine-needle biopsies of SAT. Adipocyte volume was calculated. RNA-sequencing of SAT was performed in a subset of 20 NAFLD patients. Adipocyte volume and gene expression levels were correlated to the presence of NASH or significant fibrosis. Subjects with NAFLD had larger adipocyte volume compared with controls, (1939 pL, 95% CI 1130–1662 vs. 854 pL, 95% CI 781–926, p < 0.001). There was no association between adipocyte volume and the presence of NASH. Gene expression of adipokines previously described to correlate with NASH in morbid obesity, was not associated with NASH or fibrosis. Our results suggest that persons with NAFLD have larger SAT adipocytes compared with controls and that adipocytes are involved in the pathophysiology of hepatic steatosis in NAFLD. However, adipocyte volume was not associated with NASH or fibrosis in NAFLD subjects with varying degrees of obesity.
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| 9. |
- Holmer, Mattias
(creator_code:cre_t)
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Blood treatment apparatus and method
- 2013
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Patent (övrigt vetenskapligt/konstnärligt)abstract
- A proposed blood treatment apparatus includes: a blood treatment unit (D), a pair of fluid pumps (PF1, PF2) and a pair of blood pumps (PB1, PB2). The blood treatment unit (D) is configured to receive untreated blood and fresh blood treatment fluid, and emit treated blood and used blood treatment fluid. The fluid pumps (PF1, PF2) are configured to pass blood treatment fluid through the blood treatment unit (D). The blood pumps (PB1, PB2) are configured to extract untreated blood from a blood source ( BS), pass extracted blood through the blood treatment unit (D) and deliver treated blood to a target vessel (BT). Flow measurement means (Q1, Q2, P) determines at least one blood f low parameter ( BQFI) reflecting an average flow in relation to the blood treatment unit (D) during a well-defined period of operation (T) of the apparatus, for example while completing one operation cycle.; The at least one blood flow parameter (BQFI) is determined based on a difference between (i) a first amount (DMI) of fresh blood treatment fluid received into the blood treatment unit (D), and (ii) a second amount (DMO) of used blood treatment fluid emitted from the blood treatment unit (D) during another well-defined period (Ta).
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| 10. |
- Holmer, Mattias
(creator_code:cre_t)
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Detecting blood path disruption in extracorporeal blood processing
- 2015
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Patent (övrigt vetenskapligt/konstnärligt)abstract
- A device monitors a blood path from a blood vessel access of a human subject through an extracorporeal blood processing apparatus and back to the blood vessel access. A pumping device in the blood path is operable to pump blood through the blood path from the blood withdrawal device to the blood return device. The monitoring device obtains pressure data from a pressure sensor arranged upstream of the pumping device in the blood path, and processes the pressure data for detection of a disruption of the blood path downstream of the pumping device, e.g. caused by VND (Venous Needle Dislodgement). The disruption is detected by evaluating presence/absence of cross-talk pulses at the pressure sensor, where the cross-talk pulses originate from one or more pulse generators in the extracorporeal blood processing apparatus and have propagated on a propagation path in a direction downstream of the pumping device through the blood return device, the blood vessel access and the blood withdrawal device to the pressure sensor.
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| 11. |
- Holmer, Mattias, et al.
(författare)
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Detection of Needle Dislodgement Using Extracorporeal Pressure Signals : A Feasibility Study
- 2020
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Ingår i: ASAIO Journal. - 1538-943X. ; 66:4, s. 454-462
-
Tidskriftsartikel (refereegranskat)abstract
- Venous needle dislodgement (VND) during dialysis is a rarely occurring adverse event, which becomes life-threatening if not handled promptly. Because the standard venous pressure alarm, implemented in most dialysis machines, has low sensitivity, a novel approach using extracted cardiac information to detect needle dislodgement is proposed. Four features are extracted from the arterial and venous pressure signals of the dialysis machine, characterizing the mean venous pressure, the venous cardiac pulse pressure, the time delay, and the correlation between the two pressure signals. The features serve as input to a support vector machine (SVM), which determines whether dislodgement has occurred. The SVM is first trained on a set of laboratory data, and then tested on another set of laboratory data as well as on a small data set from clinical hemodialysis sessions. The results show that dislodgement can be detected after 12-17 s, corresponding to 24-143 ml blood loss. The standard venous pressure alarm used in clinical routine only detects 50% of the VNDs, whereas the novel method detects all VNDs and has a false alarm rate of 0.12 per hour, provided that the amplitude of the extracted cardiac pressure signal exceeds 1 mmHg. The results are promising; however, the method needs to be tested on a larger set of clinical data to better establish its performance.
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| 12. |
- Hovorun, Cyril, Professor, 1974-
(författare)
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Anastasius of Sinai and His Participation in the Monothelite Controversy
- 2019
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Ingår i: Ephemerides Theologicae Lovanienses. - 0013-9513 .- 1783-1423. ; 95:3, s. 505-527
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Tidskriftsartikel (refereegranskat)abstract
- Anastasius of Sinai was one of the most creative theologians in the period when Late Antiquity was transforming to the Middle Ages. His passionate rhetoric targeted the Christological unorthodoxies of his time, primarily Monenergism and Monothelitism. In his polemics against these doctrines, Anastasius creatively elaborated on the arguments of his predecessors. He developed a complex, and sometimes surprising, taxonomy of Christ’s activities and volitions. This taxonomy included mixed human-divine, pure divine, and pure human energeiai and wills, which, to Anastasius, proved duality of Jesus Christ.
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| 13. |
- Jakobsson, Liselotte, et al.
(författare)
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Implementering
- 2013
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Ingår i: Aktionsforskning i vård och omsorg. - Malmö : Gleerups Utbildning AB. ; , s. 111-124
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 14. |
- Jakobsson, Martin, 1966-, et al.
(författare)
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An Arctic Ocean ice shelf during MIS 6 constrained by new geophysical and geological data
- 2010
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Ingår i: Quaternary Science Reviews. - : Elsevier BV. - 0277-3791 .- 1873-457X. ; 29:25-26, s. 3505-3517
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Tidskriftsartikel (refereegranskat)abstract
- The hypothesis of floating ice shelves covering the Arctic Ocean during glacial periods was developed in the 1970s. In its most extreme form, this theory involved a 1000 m thick continuous ice shelf covering the Arctic Ocean during Quaternary glacial maxima including the Last Glacial Maximum (LGM). While recent observations clearly demonstrate deep ice grounding events in the central Arctic Ocean, the ice shelf hypothesis has been difficult to evaluate due to a lack of information from key areas with severe sea ice conditions. Here we present new data from previously inaccessible, unmapped areas that constrain the spatial extent and timing of marine ice sheets during past glacials. These data include multibeam swath bathymetry and subbottom profiles portraying glaciogenic features on the Chukchi Borderland, southern Lomonosov Ridge north of Greenland, Morris Jesup Rise, and Yermak Plateau. Sediment cores from the mapped areas provide age constraints on the glaciogenic features. Combining these new geophysical and geological data with earlier results suggests that an especially extensive marine ice sheet complex, including an ice shelf, existed in the Amerasian Arctic Ocean during Marine Isotope Stage (MIS) 6. From a conceptual oceanographic model we speculate that the cold halocline of the Polar Surface Water may have extended to deeper water depths during MIS 6 inhibiting the warm Atlantic water from reaching the Amerasian Arctic Ocean and, thus, creating favorable conditions for ice shelf development. The hypothesis of a continuous 1000 m thick ice shelf is rejected because our mapping results show that several areas in the central Arctic Ocean substantially shallower than 1000 m water depth are free from glacial influence on the seafloor.
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| 15. |
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| 16. |
- Kircher, Katja, 1973-, et al.
(författare)
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Evaluation of methods for the assessment of attention while driving
- 2016
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Konferensbidrag (refereegranskat)abstract
- The ability to assess the current attentional state of the driver is important for many aspects of driving, not least in the field of automation. Knowledge about the driver’s attentional state is necessary for the assessment of the effects of additional tasks on attention, and for the transfer of control between vehicle and driver. Therefore, different methods that can be used to assess attention, were evaluated theoretically and then empirically in a controlled field study and in the laboratory.Six driving instructors participated in all experimental conditions of the study, delivering within-subjects data for all tested methods. Additional participants were recruited for some of the conditions. The test route consisted of 14 km of motorway with low to moderate traffic, which was driven three times per participant per condition. The on-road conditions were: baseline, driving with eye tracking and self-paced visual occlusion, and driving while thinking aloud. The laboratory conditions were: Describing how attention should be distributed on a motorway, giving a written percentage distribution for a motorway situation, and thinking aloud while watching a video from the baseline drive. For the analysis the on-road data were split into manoeuvres. Attention was distributed differently depending on manoeuvre type, which was evident from both eye tracking, occlusion, the think aloud protocol and the lab-based methods, therefore it is recommended to consider the type of manoeuvre when making attention assessments. The visual occlusion method is a valuable tool to assess spare visual capacity. Especially in combination with eye tracking, and in comparison with “baseline” driving it shows which glances are experienced as containing necessary information, and which glances are “spare” glances. The think aloud method is a meaningful tool to approach the driver’s actual mental representation of the situation at hand. However, this method should be used with caution, as talking about one’s attentional distribution in fact changes one’s glance behaviour in comparison to baseline driving. Expert judgements in the laboratory did not turn out to be a reliable and useful method for the assessment of drivers’ attentional distribution in traffic. This may be due to difficulties in verbally accessing procedural knowledge.For successful attention assessment in a dynamic traffic situation it is important to have access to information about the manoeuvres made by the driver in relation to other vehicles on the road. Also, knowledge about the road layout, speed limit etc. should be incorporated into the assessment. All this requires a rather advanced instrumentation of the experimental vehicle. In addition, data reduction, analysis and interpretation are demanding. To summarise, driver attention assessment in real traffic is a complex task, but a triangulation of visual occlusion, eye tracking and thinking aloud is a promising combination of methods to come further on the way.
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| 17. |
- Nonomura, Arthur M., et al.
(författare)
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The carbon reactions of photosynthesis : role of lectins and glycoregulation
- 2020
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Ingår i: Photosynthetica (Praha). - Prague : Institute of Experimental Botany of the Academy of Sciences of the Czech Republic. - 0300-3604 .- 1573-9058. ; 58:5, s. 1090-1097
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Forskningsöversikt (refereegranskat)abstract
- Modulation of glycoregulation in agriculture is reviewed here with emphasis on the elucidation of previously unknown pathways involving vacuolar lectins as well as a bypass of lectins that direct free sugars toward productivity. The reversible binding sequences of the endogenous lectin cycle are compared to an induced lectin bypass, as follows. (1) In the cycle, carbohydrate ligands, with similar binding specificities that compete for binding sites on lectins, are involved in the natural cycle of sugar exchanges. (2) For the bypass, tightly bound ligands that occupy lectins prevent free sugars from binding, making them available for productivity. This bypass is induced by methyl-α-D-mannopyranoside, a biochemical plant growth regulator for photosynthesis. Integration of this novel technology, with structural elements crucial for ligand binding by the lectins and with nitrogen assimilation, provides the basis for successful modulation of glycoregulation in crops for enhancement of quality and quantity.
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| 18. |
- Nonomura, Kazuteru, et al.
(författare)
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Blocking the Charge Recombination with Diiodide Radicals by TiO2 Compact Layer in Dye-Sensitized Solar Cells
- 2019
-
Ingår i: Journal of the Electrochemical Society. - : ELECTROCHEMICAL SOC INC. - 0013-4651 .- 1945-7111. ; 166:9, s. B3203-B3208
-
Tidskriftsartikel (refereegranskat)abstract
- The addition of a compact titanium dioxide (TiO2) layer between the fluorine-doped tin oxide (FTO) coated glass substrate and the mesoporous TiO2 layer in the dye-sensitized solar cell (DSC) based on the iodide/triiodide redox couple (I-/I-3(-)) is known to improve its current-voltage characteristics. The compact layer decreases the recombination of electrons extracted through the FTO layer with I-3(-) around the maximum power point. Furthermore, the short-circuit photocurrent was improved, which previously has been attributed to the improved light transmittance and/or better contact between TiO2 and FTO. Here, we demonstrate that the compact TiO2 layer has another beneficial effect: it blocks the reaction between charge carriers in the FTO and photogenerated diiodide radical species (I-2(-center dot)). Using photomodulated voltammetry, it is demonstrated that the cathodic photocurrent found at bare FTO electrodes is blocked by the addition of a compact TiO2 layer, while the anodic photocurrent due to reaction with I-2(-center dot) is maintained.
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| 19. |
- Nonomura, Kazuteru, et al.
(författare)
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The effect of UV-irradiation (under short-circuit condition) on dye-sensitized solar cells sensitized with a Ru-complex dye functionalized with a (diphenylamino)styryl-thiophen group
- 2009
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Ingår i: International Journal of Photoenergy (Online). - : Hindawi Limited. - 1110-662X .- 1687-529X. ; :471828
-
Tidskriftsartikel (refereegranskat)abstract
- A new ruthenium complex, cis-di(thiocyanato)(2,2'-bipyridine-4,4'-dicarboxylic acid)(4,4'-bis(2-(5-(2-(4-diphenylaminophenyl) ethenyl)-thiophen-2-yl)ethenyl)-2,2'-bipyridine)ruthenium(II) (named E322) has been synthesized for use in dye-sensitized solar cells (DSCs). Higher extinction coeff. and a broader absorption compared to the std. Ru-dye, N719, were aimed. DSCs were fabricated with E322, and the efficiency was 0.12% initially (4.06% for N719, as ref.). The efficiency was enhanced to 1.83% by exposing the cell under simulated sunlight contg. UV-irradn. at short-circuit condition. The reasons of this enhancement are (1) enhanceing electron injection from sensitizer to TiO2 following a shift toward pos. potentials of the conduction band of TiO2 by the adsorption of protons or cations from the sensitizer, or from the redox electrolyte and (2) improving the regeneration reaction of the oxidized dye by the redox electrolyte by the dissoln. of aggregated dye from the surface of TiO2 following the treatment.
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| 20. |
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| 21. |
- Petri, Henrik
(författare)
-
Asymptotic properties of welfare relations
- 2019
-
Ingår i: Economic Theory. - : Springer Science and Business Media LLC. - 0938-2259 .- 1432-0479. ; 67:4, s. 853-874
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Tidskriftsartikel (refereegranskat)abstract
- We introduce and discuss notions of efficiency in the aggregation of infinite utility streams. For any utility streams x and y, our efficiency criteria roughly require this: If a utility stream x dominates another utility stream y and if the asymptotic density of the set of coordinates in favor of x is strictly positive, then x is socially preferred to y. As a robustness check of the proposed efficiency axioms we explore the consistency of the axioms with notions of equity. Our main results characterize one period utility domains, i.e., the set of utilities Y attainable by each generation, admitting a social welfare aggregator with the desired properties.
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| 22. |
- Petri, Henrik
(författare)
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Asymptotic properties of welfare relations
- 2017
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- We introduce and discuss notions of efficiency in the aggregation of infinite utility streams. For any utility streams x and y, our efficiency criteria roughly require this: If a utility stream x dominates another utility stream y and if the asymptotic density of the set of coordinates in favor of x is strictly positive, then x is socially preferred to y. As a robustness check of the proposed efficiency axioms we explore the consistency of the axioms with notions of equity. Our main results characterize one period utility domains, i.e. the set of utilities Y attainable by each generation, admitting a social welfare aggregator with the desired properties.
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| 23. |
- Pradhan, Sourava Chandra, et al.
(författare)
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Probing photovoltaic performance in copper electrolyte dye-sensitized solar cells of variable TiO2 particle size using comprehensive interfacial analysis
- 2022
-
Ingår i: Journal of Materials Chemistry C. - : Royal Society of Chemistry. - 2050-7526 .- 2050-7534. ; 10:10, s. 3929-3936
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Tidskriftsartikel (refereegranskat)abstract
- Copper-based metal complex redox mediators proved to be an efficient, futuristic electrolyte for dye-sensitized solar cell (DSC) applications addressing many critical issues of conventional iodide/triiodide electrolytes. However, copper redox mediators being bulkier than conventional iodine electrolytes impose movement restrictions contributing to unfavourable charge transfer processes. In the present manuscript, we analyzed the impact of TiO2 particle size (20 nm and 30 nm) on the photovoltaic parameters of DSCs using an organic D35 dye and an alternate copper redox mediator, Cu[(tmby)(2)](2+/1+). DSC photoanodes with 20 nm TiO2 particles realized a lower power conversion efficiency (PCE) of 6.32 +/- 0.07% in comparison to 7.36 +/- 0.12% efficiency achieved using DSCs made with 30 nm TiO2 particles. The improved PCE using 30 nm TiO2 particles is associated with the enhancement in short circuit current density (J(sc)), open-circuit potential (V-oc) and the fill factor (FF). Furthermore, comprehensive analysis of various charge transfer processes at discrete interfaces in these devices reveals collective enhancement in light-harvesting, dye regeneration and charge collection efficiency that ultimately contributed to achieving 16% improvement in PCE using 30 nm TiO2 particles.
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| 24. |
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| 25. |
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