cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Aufbau eines Versuchsstandes zur Untersuchung der nicht-visuellen Wirkungen von Licht und dessen lichttechnische Charakterisierung
Creators: name: Barkholdt, Frithjof
name: Broszio, Kai
name: Völker, Stephan
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 621.3

description: Die nicht-visuellen Lichtwirkungen (eng. non-image-forming, NIF) bilden ein weites Forschungsfeld, welches in der modernen Gesellschaft aufgrund der langen Aufenthaltsdauern in Innenräumen, zunehmend an Bedeutung gewinnt. Die Abhängigkeit dieser Effekte von dem dominanten Einfallswinkel des Lichtes auf das menschliche Auge ist ein Forschungsschwerpunkt am Fachgebiet Lichttechnik der TU Berlin. Ziel dieser Arbeit ist es, einen bereits vorhandenen Versuchsraum baulich für einen Probandenversuch im Bereich NIF vorzubereiten und lichttechnisch klar nach den relevanten Normen (bspw. CIE S026 und DIN SPEC 5031-100) und über deren Anforderungen hinausgehend zu charakterisieren. In dem Versuch sollen zwei Lichtszenen gezeigt werden, die bei fester Blickrichtung die Augen der Probanden aus zwei unterschiedlichen Regionen beleuchten. Dabei soll eine jeweilige vertikale Beleuchtungsstärke von 1000 Lux am Auge erreicht werden. Das Spektrum soll einer typischen Bürosituation entsprechen, dabei eine hohe melanopisch gewichtete Bestrahlungsstärke besitzen, und in beiden Lichtsituation gleich sein. Realisiert wird dies mit insgesamt 12 LED-Paneelen mit jeweils 3 unterschiedlichen LED- Gruppen (kaltweiß, warmweiß, blau). Die Anordnung im Raum wird mittels einer DIALux-Simulation im Vorfeld ermittelt und anschließend umgesetzt. Für die Messung der lichttechnischen Eigenschaften wird zunächst mittels eines Spektroradiometers das mit V(λ) bewertete Spektrum am Probandensitzplatz aufgenommen. Dabei wird zugleich verifiziert, dass eine Beleuchtungsstärke von 1000 Lux in beiden Lichtsituationen erreicht wird. Anschließend wird ein Leuchtdichtebild sowie Strahldichteaufnahmen melanopisch- und V‘(λ)-gewichtet, des Raumes erstellt, um eine genaue Dokumentation der Lichtsituation zu ermöglichen. Ergänzt werden diese durch Spotmessungen mit dem Spektroradiometer in aussagekräftigen Raumrichtungen. Zur Sicherstellung der zeitlichen Stabilität werden die Messungen wiederholt über eine längere Einschaltphase der LED-Paneele durchgeführt. Die eingerichteten Lichtszenen zeigen sich über einen mehrstündigen Zeitraum stabil und erfüllen die Anforderungen des Probandenversuchs.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 19
Categorization and labeling systems concerning driving-impairing medicines: A scoping review
Creators: name: Harzand-Jadidi, Sepideh
name: Pourasghar, Faramarz
name: Sadeghi-bazargani, Homayoun
name: Farahbakhsh, Mostafa
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Classification systems concerning driving-impairing medicines can help healthcare providers identify medicinal drugs with no or the least impairing effects and inform patients of the potential risks of certain medicines to safe driving. This study aimed to comprehensively assess the characteristics of classifications and labeling systems regarding driving-impairing medicines. Google Scholar and several databases, including PubMed, Scopus, Web of Science, EMBASE, safetylit.org, and TRID were searched to identify the relevant published material. The retrieved material was assessed for eligibility. Data extraction was done to compare the categorization/labeling systems concerning driving-impairing medicines in terms of characteristics such as the number of categories, description of each category, and description of pictograms. After screening 5,852 records, 20 studies were selected for inclusion in the review. This review identified 22 categorization/labeling systems regarding medicines and driving. Classification systems had different characteristics, but most of them were designed based on the graded categorization system described by Wolschrijn. Initially, categorization systems had seven levels, but later the medicine impacts were summarized into 3 or 4 levels. Although different categorization/labeling systems regarding driving-impairing medicines are available, the most effective systems in changing driver’s behavior are the simple and understandable ones. Besides, health care providers should consider patient’s socio-demographic features when informing them about driving under the influence.
Organics in soda-anthraquinone black liquors from hot-water-extracted non-wood feedstocks
Creators: name: Ullah, Saleem
name: Pakkanen, Hannu
name: Lehto, Joni
name: Alén, Raimo
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Plant Biology

description: The chemical compositions of black liquors (BLs) obtained from the soda-anthraquinone (AQ) pulping of untreated and hot-water-extracted non-wood feedstocks (okra stalk, miscanthus stalk, and wheat straw) were determined. These under-utilized renewable and widely available feedstocks could provide a cheaper source for producing fiber and precursors for manufacturing green chemicals. These BLs were mainly characterized in terms of carbohydrate-derived volatile carboxylic acids (acetic and formic acids) and non-volatile carboxylic acids (hydroxy acids) as well as lignin. Additionally, in each case, the average molar mass and molar mass distribution of the dissolved lignin were measured. Results indicated typical effects of hot-water extraction; for example, in the case of hot-water-extracted feedstocks, compared to untreated feedstocks, more aliphatic carboxylic acids were formed, whereas in both cases the removal of lignin was similar. The maximum total amounts of aliphatic carboxylic acids were in the following order: okra/150 °C/P200 (39 g L−1) > miscanthus/150 °C/P200 (31 g L−1) > wheat/150 °C/P200 (15 g L−1). On the other hand, the total dissolved lignin was in the following order: wheat/150 °C/P200 (45 g L−1) > miscanthus/150 °C/P200 (35 g L−1) ≈ okra/140 °C/P50 (35 g L−1). The hot-water extraction also affected weight average molar mass (M¯w) values of the dissolved lignin in BLs. When the pre-treatment conditions became harsher, the M¯w values increased; the lowest value detected was 4160 g mol−1 for lignin in the okra BL from the untreated feedstock, and the highest value, 8730 g mol−1, was obtained for lignin in the wheat BL from pre-treated feedstock (150 °C/P200). All the data obtained are of importance when planning the overall strategy for recovering the non-wood-derived aliphatic carboxylic acids and lignin formed in this kind of integrated biorefinery approach.
title: Finde den NIF-Supersitzplatz
Creators: name: Eichbrett, Nadine
name: Broszio, Kai
name: Völker, Stephan
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 621.3

description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 29
Do factors associated with older pedestrian crash severity differ? A causal factor analysis based on exposure level of pedestrians
Creators: name: Guo, Manze
name: Yuan, Zhenzhou
name: Janson, Bruce
name: Peng, Yongxin
name: Yue, Rui
name: Zhang, Guowu
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Older pedestrians are more likely to have severe or fatal consequences when involved in traffic crashes. Identifying the factors contributing to the severity and possible interdependencies between factors in specific exposure areas is the first step to improving safety. Therefore, examining the causal factors’ impact on pedestrian-vehicle crash severity in a given area is vital for formulating effective measures to reduce the risk of pedestrian fatalities and injuries. This study implements the Thiessen polygon algorithm deployed to define older pedestrians’ exposure influence area. Enabling trip characteristics and built environment information as exposure index settings for the background of the pedestrian severity causal analysis. Then, structural equation modeling (SEM) was applied to conduct a factor analysis of the crash severity in high- and low-exposure areas. The SEM evaluates latent factors such as driver risk attitude, risky driving behavior, lack of risk perception among older pedestrians, natural environment, adverse road conditions for driving or walking, and vehicle conditions. The SEM crash model also establishes the relationship between each latent factor. In total, drivers’ risky driving behavior (0.270, p < 0.05) in low-exposure areas significantly impacts older pedestrian crash severity more than in high-exposure areas. Lack of risk perception among older pedestrians (0.232, p < 0.05) is the most critical factor promoting crash severity in high-exposure areas. The natural environment (0.634, p < 0.05) in high-exposure areas positively influences older pedestrians’ lack of risk perception more than in low-exposure areas. Significant group differences (p-values ∼ 0.001-0.049) existed between the causal factors of the high-exposure risk areas and the low-exposure risk factors. Different exposure intervals require detailed scenarios based on the critical risks identified. The crash severity promotion measures in different exposure areas can be focused on according to the critical causes analyzed. Those clues, in turn, can be used by transportation authorities in prioritizing their plans, policies, and programs toward improving the safety and mobility of older pedestrians.
Alexander Koch, Bügelfibeln der Merowingerzeit im westlichen Frankenreich
Creators: name: Katsougiannopoulou, Christina
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Alexander Koch, Bügelfibeln der Merowingerzeit im westlichen Frankenreich. Römisch-Germanisches Zentralmuseum, Forschungsinstitut für Vor- und Frühgeschichte. Monographien, Band 41,1-2. Verlag des Römisch-Germanischen Zentralmuseums in Kommission bei Dr. Rudolf Habelt GmbH, Mainz 1998. XIII, 748 Seiten, 21 Textabbildungen, 33 Karten, 4 Typentafeln, 58 Phototafeln
description: Bonner Jahrbücher, Bd. 199.1999(2002): Bonner Jahrbücher
title: Research on the electrical parameters of modern LED street luminaire
Creators: name: Petrov, Lyubomirov
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: LED street light
subject: LED parameters
subject: electrical parameters of LED
subject: 621.3

description: The report presents the study of the electrical parameters (P, Q, S, cos φ, harmonic pollution, etc.) of a modern LED street luminaire. For the purpose of the study, an LED streetlight luminaire with COB-LED and a glass optical system was selected. The electrical power of the luminaire is 30 watts, the power supply voltage is 220 volts, the driver is on reputable manufacturer. The luminaire has been studied for a long period of operation for a period of 1 month. To measure the data, a power network analyzer with very good accuracy and the ability to record the measured parameters is used. The report presents the results of the measurement of the LED illuminator and the processing of the received data. There are made appropriate conclusions from the study.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 35
title: Investigation of the suitability of high-power LEDs for the use as radiation source for PTB’s gonioreflectometer
Creators: name: Santourian, Irina
name: Teichert, Sven
name: Hauer, Kai-Olaf
name: Schirmacher, Alfred
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: High-power LEDs
subject: gonioreflectometer
subject: radiance factor
subject: homogeneous sphere radiator
subject: 621.3

description: The application areas in which light-emitting diodes (LEDs) are used as radiation sources are growing steadily. Main reasons are their long lifetime, efficiency and the available high radiation power. Also, the increase of accessible spectral ranges through the use and production of new semiconductor compounds make them attractive for many applications. Due to these advantages of LEDs, the suitability as (supplementary) radiation sources for the existing robot-based gonioreflectometer at PTB was investigated.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 43
Synthesis of biodiesel by KOH-catalyzed methanolysis of flaxseed oil and determination of fuel properties
Creators: name: Mandal, Suyash
name: Kundu, Krishnendu
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Inorganic Chemistry
subject: Plant Biology
subject: 60506 Virology

description: Vegetable oils are usually not used directly in diesel engines due to their high viscosity. In this study, biodiesel was produced from flaxseed oil by transesterification at 60 °C. The process variables – methanol concentration (as methanol:oil molar ratio), catalyst concentration (KOH % wt/wt of oil) and reaction time – were used to analyze the process on the basis of methyl ester yield and kinematic viscosity. The reaction with catalyst concentration 1%, reaction time 45 minutes and methanol:oil molar ratio 6:1 had the highest methyl ester yield, of 94%. The kinematic viscosity decreased from 24.2 to 3.54 cSt following the reaction, producing a suitable value within the standard limits. Fuel properties of the flaxseed methyl ester, such as American Petroleum Institute (API) gravity, flash point, calorific value, acid number and carbon residue, were measured and found to be within the standard limits.
Two types of topological transitions in finite Majorana wires
Creators: name: Pikulin, Dmitry I.
name: Nazarov, Yuli V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Motivated by the recent advances in studying Majorana states in nanowires under conditions of superconducting proximity effect, we address the correspondence between the common topological transition in infinite system and the topological transition of other type that manifests itself in the positions of the poles of the scattering matrices. We establish a universal dependence of the pole positions in the vicinity of the common transition on the parameter controlling the transition, and discuss the manifestations of the pole transitions in the differential conductance.
description: 5 pages, 3 figures. Version 2: typo corrected
title: Influence of the light distribution of luminaires and the room surfaces’ reflectance on the illumination levels, uniformity and glare in indoor lighting systems
Creators: name: Petrinska, Iva
name: Ivanov, Dilyan
name: Georgiev, Valchan
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: Light distribution curves
subject: reflectance coefficients
subject: LED luminires’ efficiency
subject: 621.3

description: The increasing use of LED luminaires provides a lot of opportunities for indoor lighting. On one side the use of LED luminaires can lead to significant reduction in the electricity consumption for lighting, on the other side it can be so tuned that it allows human centric lighting. The advantages of LEDs as light sources are indisputable, but they also have some drawbacks, that should be considered. A lot of attention is currently payed to optimization of the light distribution curves of luminaires for indoor lighting. It is very important, but not the only characteristic that should be considered. The real reflective properties of the indoor surfaces also influence to great extend the quality and quantity of indoor lighting. The current paper aims to make a detailed review of the existing LED luminaires and their efficiency for indoor lighting, based on their light distribution curve and the reflective properties of the surfaces in the room space. Except for the qualitative, also the quantitative properties of the lighting systems are considered in terms of uniformity of the illuminance and glare. One of the designed solutions is also practically realized and experimentally tested. A comparison between designed and real values of illuminance, uniformity and glare is made.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 63
title: Photobiological Risk from the Spectral Emission of Human Centric LED Luminaires – Case Study
Creators: name: Nikolova, Kamelia
name: Petrinska, Iva
name: Ivanov, Dilyan
name: Pavlov, Dimitar
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: Photobiological safety
subject: human centric LED luminaires
subject: 621.3

description: People spend most of their time indoors. That is a good reason for implementation Human Centric Lighting solutions in offices. Such solutions can lead to increased productivity and motivation to employees. The spectral composition of light, the timing of the different light scenes and the duration of light exposure play important role for the non-visual effects of light that occur in humans. Moreover, research has shown that these effects may depend on the environment, specifics of the activity, and personal characteristics of people. The use of LED Luminaires makes the implementation of Human Centric Lighting easy and possible. The LEDs as light sources, however can lead to blue light hazard risk that should be estimated. The human eye is adapted to function in a media of optical radiation that ensures not only vision, but also important physiological functions. The emission of LED luminaires is in wide spectrum, especially in the blue part, and it can be both favorable and harmful. The current paper represents an experimental research of the possibility of blue light hazard in a real human centric lighting system.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 71
title: Einfluss von Betriebsstrom und Umgebungstemperatur auf den Alterungszustand der elektrischen Größen von High Power LEDs
Creators: name: Weigt, Benjamin
name: Homeyer, Kai
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: Degradation
subject: High Power LEDs
subject: Messdaten über 9000 h
subject: 621.3

description: Der Alterungszustand von LEDs ist eine wichtige Fragestellung für Hersteller und Verbraucher, da die LED zurzeit die bedeutendste Beleuchtungstechnik ist. Die LED als Gesamtsystem hat viele Alterungsmechanismen, die in den letzten Jahren auf über fünfzig gestiegen sind. Die folgende Arbeit analysiert die Änderung der elektrischen Größen in Bezug auf den Alterungszustand der LED durch den Einfluss des Betriebsstromes und Umgebungstemperatur. Die elektrischen Größen wie z.B. Fotostrom und Bahnwiderstand zeigen ihre Auswirkungen in den verschiedenen Bereichen der LED Kennlinie. Das Ziel ist den Alterungszustand elektrisch zu messen und ein elektrisches Ersatzmodell der LED-Alterung zu erstellen. Die Datenbasis bilden High Power LEDs von zwei verschiedenen Herstellern aus unterschiedlichen Halbleitermaterialien, die bei jeweils drei verschiedenen Betriebsströme und Umgebungstemperaturen über 9000 h gealtert sind.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 77
Energy Distribution for Non-commutative Radiating Schwarzschild Black Holes
Creators: name: Radinschi, I.
name: Rahaman, F.
name: Mondal, U. F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The aim of this article is the calculation of the energy-momentum for a non-commutative radiating Schwarzschild black hole in order to obtain the expressions for energy. We make the calculations with the Einstein and M\oller prescriptions. We show that the expressions for energy in both the prescriptions depend on the mass $M$, $θ$ parameter and radial coordinate. We make some comparisons between the results. Our results show that the Einstein prescription is a more powerful concept than the M\oller prescription.
description: 5 pages and 6 figures. Revised version submitted in Int.J.Theor.Phys. after minor revision
title: Rückwärtsschnitt zur geometrischen Kalibrierung einer kamerabasierten Goniometermesstechnik für hochauflösende Lichtstärkeverteilungen
Creators: name: Feßler, Jan
name: Katona, Markus
name: Trampert, Klaus
name: Neumann, Cornelius
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 621.3

description: Für die Bestimmung von hochaufgelösten Lichtstärkeverteilungskurven (LVK) mittels kamerabasierter Goniometermesstechnik ist eine geometrische Kalibrierung notwendig. Diese stellt den räumlichen Zusammenhang zwischen den einzelnen Komponenten des Messsystems bestehend aus Kamera, Goniometer und einem weißen Schirm her. Zur Bestimmung der geometrischen Kalibrierung wird im Folgenden mithilfe eines photogrammetrischen Verfahrens die Pose einer Kamera im Raum geschätzt. Hierfür werden geometrisch bekannte Objektpunkte sowie deren Bildpunkte in der Abbildung durch eine Messkamera, welche durch das Lochkameramodell beschrieben wird. Des Weiteren werden die intrinsischen Parameter der Kamera benötigt. Die Berechnung beruht auf den Kollinearitätsgleichungen, welche einen mathematischen Zusammenhang zwischen Punktepaaren und der Kamerapose, zusammengesetzt aus Translation und Rotation, herstellen. Bei der folgenden Validierung des Kalibrieransatzes nimmt eine Kamera die Position der Lichtquelle ein, um so Aussagen über die Anwendbarkeit des Ansatzes treffen zu können.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 87
Solution of two-center time-dependent Dirac equation in spherical coordinates: Application of the multipole expansion of the electron-nuclei interaction
Creators: name: McConnell, S. R.
name: Artemyev, A. N.
name: Mai, M.
name: Surzhykov, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A non-perturbative approach to the solution of the time-dependent, two-center Dirac equation is presented with a special emphasis on the proper treatment of the potential of the nuclei. In order to account for the full multipole expansion of this potential, we express eigenfunctions of the two-center Hamiltonian in terms of well-known solutions of the "monopole" problem that employs solely the spherically-symmetric part of the interaction. When combined with the coupled-channel method, such a wavefunction-expansion technique allows for an accurate description of the electron dynamics in the field of moving ions for a wide range of internuclear distances. To illustrate the applicability of the proposed approach, the probabilities of the K- as well as L- shell ionization of hydrogen-like ions in the course of nuclear alpha-decay and slow ion-ion collisions have been calculated.
Exact Chiral Invariance at Finite Density on Lattice
Creators: name: Gavai, Rajiv V.
name: Sharma, Sayantan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: A new lattice action is proposed for the overlap Dirac matrix with nonzero chemical potential. It is shown to preserve the full chiral invariance for all values of lattice spacing exactly. It is further demonstrated to arise in the domain wall formalism by coupling the chemical potential count only to the physically relevant wall modes.
description: 5 pages, contribution to "Extreme QCD" workshop, 21-23 August 2012, Washington DC, USA
First-Principles Determination of the Structure of Magnesium Borohydride
Creators: name: Zhou, Xiang-Feng
name: Oganov, Artem R.
name: Qian, Guang-Rui
name: Zhu, Qiang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The energy landscape of Mg(BH4)2 under pressure is explored by ab initio evolutionary calculations. Two new tetragonal structures, with space groups P-4 and I41/acd are predicted to be lower in enthalpy, by 15.4 kJ/mol and 21.2 kJ/mol, respectively, than the earlier proposed P42nm phase. We have simulated X-ray diffraction (XRD) spectra, lattice dynamics, and equations of state (EOS) of these phases. The density, volume contraction, bulk modulus, and the simulated XRD patterns of I41/acd and P-4 structures are in excellent agreement with the experimental results.
description: xfzhou@nankai.edu.cn
title: Systemanalyse eines bildgebenden LVK Messsystems mittels Monte Carlo Simulation
Creators: name: Katona, Markus
name: Trampert, Klaus
name: Neumann, Cornelius
name: Schwanengel, Christian
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: Goniophotometer
subject: Fernfeld
subject: Leuchtdichtemesskamera
subject: geometrische Systembeschreibung
subject: Kinematik
subject: 621.3

description: Die Lichtstärkeverteilungskurve einer Lichtquelle (LVK) wird klassischerweise mit einem Goniophotometer gemessen. Dafür wird die LVK der Lichtquelle in großer Entfernung mit einem Photometer abgetastet. Durch die punktuelle Abtastung des Winkelraums ist die Messauflösung direkt mit dem Zeitbedarf gekoppelt. Als Alternative hierzu hat sich die LVK Messung mit bildgebenden Empfängern entwickelt, bei der ein großer Ausschnitt der LVK mit nur einer Messung aufgenommen wird. In Kombination mit einem Goniometer ist es durch Mehrfachaufnahmen möglich die vollständige LVK der Lichtquelle zu bestimmen. So kann bei deutlich geringerem Zeitbedarf die LVK mit sehr hoher Winkelauflösung erfasst werden. Für eine Sensitivitätsanalyse ist eine photometrische wie auch geometrische Modellierung des Systems notwendig. Dieser Beitrag behandelt die Aufstellung der geometrischen Systembeschreibung der bildgebenden LVK-Messtechnik mithilfe kinematischer Transformationen. Durch die Methode der Monte-Carlo-Simulation kann der Einfluss der Unsicherheitsparameter der geometrischen Eingangsgrößen auf das Gesamtergebnis einer Messung analysiert und in Form einer Winkel- und Distanzunsicherheit ausgegeben werden. Diese können als Grundlage für eine spätere Messunsicherheitsbetrachtung des Gesamtsystems verstanden werden.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 101
String States on AdS_3 x S^3 from the Supergroup
Creators: name: Gerigk, Sebastian
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the hybrid formulation of string theory on AdS_3 x S^3, the compactification-independent physical spectrum at the first massive level is determined. We find that these states transform in representations of the Lie superalgebra psl(2|2) and present a cohomological characterisation of them within the context of the PSL(2|2) WZW model. We conjecture that a similar cohomological description of the physical states also exists at higher mass levels and give partial evidence for this by comparing our results to the RNS string spectrum.
description: 38 pages, LaTeX; v2: explanations and references added; v3: typos corrected
title: Analyse von Digitalkameras im Infrarotbereich für die 3D-Rekonstruktion von Personen
Creators: name: Leontopoulos, Marina
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 621.3

description: Einer der wichtigsten Aspekte bei Virtual Reality-Inhalten ist die Immersion. Gerade bei Darstellungen von Personen ist der menschliche VR-Betrachter in der Lage kleinste Ungereimtheiten ausfindig zu machen. Im Gegensatz zum Computer Graphics-Ansatz wird beim volumetrischen Video keine Figur per Computer generiert, die einen echten Menschen nachbilden soll. Stattdessen wird eine reale Person in Volumetric Video Studios mit 32 Kameras gleichzeitig aufgenommen und anschließend zu mehreren 3D-Modellen rekonstruiert. Diese 3D-Modelle lassen sich danach in eine VR-Umgebung einfügen und als begehbarer Film betrachten. Um die Qualität der Rekonstruktionen weiter zu verbessern, wurde untersucht, inwiefern sich infrarote und rote Strahlung nutzen lassen, um auf glatter Haut Muster zu erzeugen. Zudem wurde ein Messkörper entwickelt und aufgebaut, der einem menschlichen Kopf in seiner Form, Struktur sowie seinen spektralen Reflexionseigenschaften nachempfunden ist.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 115
Deterministic and stochastic optimization of dilute acid pretreatment of sugarcane bagasse
Creators: name: Verma, Sumit Kumar
name: Shastri, Yogendra
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Plant Biology
subject: Computational Biology

description: Dilute acid pretreatment of lignocellulosic biomass depolymerizes xylan into xylose and lignin into acid-soluble lignin (ASL). Xylose is a desired product, while the lignin fraction can be reduced by producing ASL, since lignin is a non-competitive inhibitor for enzymatic hydrolysis. The optimal conditions for depolymerization of xylan into xylose and lignin into ASL differ during acid pretreatment of bagasse. Hence, multi-objective optimization problems (MOOPs) were formulated for a batch reactor considering temperature as the decision variable. Two different MOOP studies, namely maximization of the weighted sum of final xylose and ASL yields, and minimization of weighted deviation of final xylose and ASL yields around a targeted value, were considered. The optimal temperature varied between 143.2 °C and 113.1 °C along the Pareto front for static optimization. The batch time minimization problem reduced batch time by 32% to achieve desired xylose yield. Dynamic optimization provided minimal benefits over static optimization. Stochastic optimization considering expected uncertainties showed that uncertainties in kinetic parameters impacted results selectively. The optimal temperature decreased by 10 °C for ± 15% variability in kinetic parameters for ASL yield maximization, while it changed marginally for xylose yield maximization. Stochastic optimization showed benefits over static optimization for large variability in kinetic parameters.
Capture of non-relativistic particles in eccentric orbits by a Kerr black hole
Creators: name: Will, Clifford M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We obtain approximate analytic expressions for the critical value of the total angular momentum of a non-relativistic test particle moving in the Kerr geometry, such that it will be captured by the black hole. The expressions apply to arbitrary orbital inclinations, and are accurate over the entire range of angular momentum for the Kerr black hole. The expressions can be easily implemented in N-body simulations of the evolution of star clusters around massive galactic black holes, where such captures play an important role.
description: 8 pages, 1 figure, published version
title: Entwicklung eines Farbkalibrierungssystems für ein Mehrkamerasystem zur 3D Rekonstruktion von Personen
Creators: name: Müller, Silke
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 621.3

description: In diesem Paper werden drei Varianten zur Farbkalibrierung eines Mehrkamerasystems für die 3D-Rekonstruktion von Personen vorgestellt, um eine Generierung von fehlerfreien Texturen zu ermöglichen. Besonderer Fokus wird dabei auf die Anforderungen zum Einsatz eines konventionellen Referenzcharts in der Umgebung eines volumetrischen Videostudios gelegt. Im Rahmen der Masterarbeit konnte gezeigt werden, wie wichtig es ist, dass neben der farbmetrischen und lichttechnischen Stabilität der Leuchten eine identische Beleuchtung der Charts für alle Kameras gewährleistet wird. Als Alternative werden in Kürze zwei aktive, d.h. selbstleuchtende Kalibrierobjekte vorgestellt. Die erste Variante verwendet die RGBModule der verbauten Studioleuchten, das zweite sieht den Aufbau einer LED-Leuchte mit RGBA-Emitter vor.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 127
title: Einfluss von Tuben zur Abschirmung von Streulicht bei photometrischen Messungen
Creators: name: Kallenbach, Laura
name: Gerloff, Thorsten
name: Ledig, Johannes
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 621.3

description: In diesem Beitrag wird der Einfluss von Tuben zur Streulichtreduzierung auf Messungen von photometrischen und radiometrischen Größen untersucht. Dazu wurden Messungen mit einer grünen 5 mm LED sowie einem Leuchtdichtenormal mit einer Halogenglühlampe und einer Lichtaustrittsfläche von 70 mm im Durchmesser durchgeführt. Zum Einsatz kamen sechs verschiedene Empfänger (drei Photometer und drei Radiometer), welche jeweils mit sechs verschiedenen Tuben sowie ohne Tubus eingesetzt wurden. Die Tuben unterscheiden sich in ihren matt schwarzen bzw. schwarz eloxierten (glänzenden) Ringblenden, der Blendenposition im Tubus, dem Fasenwinkel und der Ausrichtung der Fase zur Lichtquelle bzw. zum Empfänger. Die Messungen erfolgten in einer reflexionsarmen Umgebung. Die Ergebnisse wurden im Anschluss analysiert und graphisch aufgearbeitet. Dabei sind Unstimmigkeiten im Bezug zu einem Empfänger aufgetreten, die im Weiteren mit zusätzlichen Messungen untersucht wurden.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 137
Futures with Jaime Escalante, Episodes 109 and 110, “Putting Man in Space” and “Sound Engineering”
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2018
Subjects: Manned space flight--Systems engineering
Acoustical engineering

description: Packaging from videocassette recording of "Futures with Jaime Escalante," Episodes 109 and 110, "Putting Man in Space" and "Sound Engineering."
Unstable Price Dynamics as a Result of Information Absorption in Speculative Markets
Creators: name: Patzelt, Felix
name: Pawelzik, Klaus R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: In speculative markets, risk-free profit opportunities are eliminated by traders exploiting them. Markets are therefore often described as "informationally efficient", rapidly removing predictable price changes, and leaving only residual unpredictable fluctuations. This classical view of markets absorbing information and otherwise operating close to an equilibrium is challenged by extreme price fluctuations, in particular since they occur far more frequently than can be accounted for by external news. Here we show that speculative markets which absorb mainly self-generated information can exhibit both: evolution towards efficient equilibrium states as well as their subsequent destabilization. This peculiar dynamics, a generic instability arising from an adaptive control which annihilates predictable information, is realized in a minimal agent-based market model where the impacts of agents' strategies adapt according to their trading success. This adaptation implements a learning rule for the market as a whole minimizing predictable price changes. The model reproduces stylized statistical properties of price changes in quantitative detail, including heavy tailed log return distributions and volatility clusters. Our results demonstrate that the perpetual occurrence of market instabilities can be a direct consequence of the very mechanisms that lead to market efficiency.
description: Paper and supplement are combined in a single file. Changes in this Version: Added an introductory paragraph. Expanded discussion on the differences between the presented model and minority games. Added two supplementary figures
Current path in light emitting diodes based on nanowire ensembles
Creators: name: Limbach, Friederich
name: Hauswald, Christian
name: Lähnemann, Jonas
name: Wölz, Martin
name: Brandt, Oliver
name: Trampert, Achim
name: Hanke, Michael
name: Jahn, Uwe
name: Calarco, Raffaella
name: Geelhaar, Lutz
name: Riechert, Henning
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Light emitting diodes (LEDs) were fabricated using ensembles of free-standing (In,Ga)N/GaN nanowires (NWs) grown on Si substrates in the self-induced growth mode by molecular beam epitaxy. Electron beam induced current analysis, cathodoluminescence as well as biased $μ$-photoluminescence spectroscopy, transmission electron microscopy, and electrical measurements indicate that the electroluminescence of such LEDs is governed by the differences in the individual current densities of the single-NW LEDs operated in parallel, i.e. by the inhomogeneity of the current path in the ensemble LED. In addition, the optoelectronic characterization leads to the conclusion that these NWs exhibit N-polarity and that the (In,Ga)N quantum well states in the NWs are subject to a non-vanishing quantum confined Stark effect.
description: This is an author-created, un-copyedited version of an article accepted for publication in Nanotechnology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.1088/0957-4484/23/46/465301
title: Sensor array for the analysis of the lighting situation in an intelligent industrial hall
Creators: name: Benkner, Simon
name: Khanh, Tran
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: intellogent lighting
subject: smart lighting
subject: color sensor
subject: daylight
subject: adaptive illumination
subject: 621.3

description: In this paper, the possibility of using a multi-channel color sensor to identify artificial light and daylight for use in an intelligently illuminated industrial hall is investigated. First, an overview of intelligent lighting systems is given and the experimental setup is explained. Due to the large amount of data, the processing of large data sets is then highlighted. On the basis of the data collected, it will then be shown that it is possible to distinguish between daylight and artificial light using multi-channel colour sensors.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 147
Effects of forward collision warning and automatic emergency braking on rear-end crashes involving pickup trucks
Creators: name: Cicchino, Jessica B.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer

description: Forward collision warning (FCW) and automatic emergency braking (AEB) have found to be effective on cars, SUVs, and large trucks. The objective of this study was to extend prior work and estimate the effects of FCW and AEB on pickups. Rear-end crashes where a pickup with optional FCW or AEB was the striking vehicle were identified in 25 U.S. states during 2017–2020. Quasi-induced exposure was performed with logistic regression to compare rear-end-striking crashes between vehicles with and without the systems relative to being struck in the rear. Rear-end-striking crash rates per registered vehicle year were also compared between equipped and non-equipped pickups with Poisson regression. The association of the systems with severity in the rear-end-striking crashes that occurred was examined with logistic regression. In the quasi-induced exposure analysis, AEB was associated with statistically significant 34% reductions in the risk of a rear-end-striking crash of any severity and with any injuries, and a 76% reduction in the risk of a rear-end-striking crash with serious or fatal injuries (p = 0.09). FCW was associated with statistically significant declines of 22% in the risk of a rear-end-striking crash with any injuries and 71% in the risk of a rear-end-striking crash with serious or fatal injuries, but FCW was not associated with a change in all rear-end-striking crashes. Results were similar in Poisson regression models for all but FCW’s effect on all rear-end-striking crashes. The odds that rear-end-striking crashes involving pickups with FCW resulted in any injuries were 26% lower, and serious/fatal injuries were 75% lower, than those involving pickups without the system. AEB was associated with a nonsignificant reduction in the odds of serious/fatal injuries when a rear-end strike occurred and no change in the odds of any injuries. Consistent benefits for front crash prevention systems have been demonstrated for a wide range of vehicle types, now including a sample of pickups. Gaps in proposed U.S. regulations should be filled so that AEB is required equipment on all new vehicles.
title: Harmonic distortions from LED lighting in industrial buildings
Creators: name: Petrov, Lyubomirov
name: Musev, Angel
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: LED harmonics
subject: harmonic pollution
subject: LED drivers
subject: 621.3

description: In recent years, there was increased use of advanced light sources with electronic control gear (LED Sources). This inevitably affects the generation of harmonic pollution in the power grids for lighting. The report presents a study of harmonic pollution in industrial power grids for lighting. The aim of the study was to analyze the impact of modern LED sources on the quality of energy in industrial lighting power grids. Since it is usually in the industry, lighting networks have a large number of luminaires and high power, the impact of the generated harmonics on the power supply parameters is noticeable. A particular lighting facility of a medium-sized industrial building was investigated. The study is done with the operation of the lighting system. Various electrical parameters were measured using a network analyzer. Results are displayed after processing the measured data. There are made appropriate conclusions from the study.
description: Lux junior 2019: 14. Internationales Forum für den lichttechnischen Nachwuchs, 06. – 08. September 2019, Dörnfeld/Ilm : Tagungsband, p. 155
Predicting pedestrian crosswalk behavior using Convolutional Neural Networks
Creators: name: Liang, Eric
name: Stamp, Mark
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Neuroscience
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Pedestrian accidents contribute significantly to the high number of annual traffic casualties. It is therefore crucial for pedestrians to use safety measures, such as a crosswalk, and to activate pedestrian signals. However, people often fail to activate the signal or are unable to do so – those who are visually impaired or have occupied hands may be unable to activate the system. Failure to activate the signal can result in an accident. This paper proposes an improvement to crosswalk safety by designing a system that can detect pedestrians and trigger the pedestrian signal automatically when necessary. In this study, a dataset of images was collected in order to train a Convolutional Neural Network (CNN) to distinguish between pedestrians (including bicycle riders) when crossing the street. The resulting system can capture and evaluate images in real-time, and the result can be used to automatically activate a system such as a pedestrian signal. A threshold system is also implemented that triggers the crosswalk only when the positive predictions pass the threshold. This system was tested by deploying it at three real-world environments and comparing the results with a recorded video of the camera’s view. The CNN prediction model is able to correctly predict pedestrian and cyclist intentions with an average accuracy of 84.96% and had an absence trigger rate of 0.037%. The prediction accuracy varies based on the location and whether a cyclist or pedestrian is in front of the camera. Pedestrians crossing the street were correctly predicted more accurately than cyclists crossing the street by up to 11.61%, while passing (i.e., non-crossing) cyclists were correctly ignored more than passing pedestrians, by up to 18.75%. Based on the testing of the system in real-world environments, the authors conclude that it is feasible as a back-up system that can complement existing pedestrian signal buttons, and thereby improve the overall safety of crossing the street. Further improvements to the accuracy can be achieved with a more comprehensive dataset for a specific location where the system is deployed. Implementing different computer vision techniques optimized for tracking objects should also increase the accuracy.
Frobenius Splittings
Creators: name: van der Kallen, Wilberd
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13A35 (Primary) 14F17, 20G40 (Secondary)

description: We give a gentle introduction to Frobenius splittings. Then we recall a few results that have been obtained with the method.
description: 21 pages, typos corrected