cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fundamental Limitations of Pixel Based Image Deconvolution in Radio Astronomy
Creators: name: Yatawatta, Sarod
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Deconvolution is essential for radio interferometric imaging to produce scientific quality data because of finite sampling in the Fourier plane. Most deconvolution algorithms are based on CLEAN which uses a grid of image pixels, or clean components. A critical matter in this process is the selection of pixel size for optimal results in deconvolution. As a rule of thumb, the pixel size is chosen smaller than the resolution dictated by the interferometer. For images consisting of unresolved (or point like) sources, this approach yields optimal results. However, for sources that are not point like, in particular for partially resolved sources, the selection of right pixel size is still an open issue. In this paper, we investigate the limitations of pixelization in deconvolving extended sources. In particular, we pursue the usage of orthonormal basis functions to model extended sources yielding better results than by using clean components.
description: 4 pages, 5 figures, the 6th IEEE Sensor Array and Multichannel Signal Processing workshop
A quadrilateral half-turn theorem
Creators: name: Minevich, Igor
name: Morton, Patrick
Publisher: name: arXiv
Year: 2025
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 51A05

description: If $ABC$ is a given triangle in the plane, $P$ is any point not on the extended sides of $ABC$ or its anticomplementary triangle, $Q$ is the complement of the isotomic conjugate of $P$ with respect to $ABC$, $DEF$ is the cevian triangle of $P$, and $D_0$ and $A_0$ are the midpoints of segments $BC$ and $EF$, respectively, a synthetic proof is given for the fact that the complete quadrilateral defined by the lines $AP, AQ, D_0Q, D_0A_0$ is perspective by a Euclidean half-turn to the similarly defined complete quadrilateral for the isotomic conjugate $P'$ of $P$ . This fact is used to define and prove the existence of a generalized circumcenter and generalized orthocenter for any such point $P$.
description: 7 pages, 1 figure
Triplet Matching for Estimating Causal Effects with Three Treatment Arms: A Comparative Study of Mortality by Trauma Center Level
Creators: name: Nattino, Giovanni
name: Lu, Bo
name: Shi, Junxin
name: Lemeshow, Stanley
name: Xiang, Henry
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Science Policy

description: Comparing outcomes across different levels of trauma centers is vital in evaluating regionalized trauma care. With observational data, it is critical to adjust for patient characteristics to render valid causal comparisons. Propensity score matching is a popular method to infer causal relationships in observational studies with two treatment arms. Few studies, however, have used matching designs with more than two groups, due to the complexity of matching algorithms. We fill the gap by developing an iterative matching algorithm for the three-group setting. Our algorithm outperforms the nearest neighbor algorithm, and is shown to produce matched samples with total distance no larger than twice the optimal distance. We implement the evidence factors method for binary outcomes, which includes a randomization-based testing strategy and a sensitivity analysis for hidden bias in three-group matched designs. We apply our method to the Nationwide Emergency Department Sample data to compare emergency department mortality among non-trauma, level I and level II trauma centers. Our tests suggest that the admission to a trauma center has a beneficial effect on mortality, assuming no unmeasured confounding. A sensitivity analysis for hidden bias shows that unmeasured confounders, moderately associated with the type of care received, may change the result qualitatively.
Gait retraining for reducing biomechanical injury risk factors in novice recreational runners
Creators: name: Napier, Christopher
Publisher: name: University of British Columbia
Year: 2019

description: Introduction: The etiology of running-related injuries is multifactorial, but it is accepted that biomechanical factors play a role. This thesis examined the influence of peak braking force on running-related injury risk and the effectiveness of a gait retraining program using real-time biofeedback to reduce this parameter in high-risk individuals. Methods: Healthy novice female recreational runners were recruited from the local running community. The studies in Chapters 2 and 3 were run in parallel, while the study described in Chapter 4 took place following their completion. Kinetic risk factors of running-related injury were examined using a prospective longitudinal cohort design and Cox proportional hazard models with competing risks were fit for each kinetic variable independently (Chapter 2). Baseline data were then analyzed to determine the kinematic correlates of kinetic risk factors using stepwise multiple linear regression to evaluate the amount of variance in each kinetic outcome explained by speed, foot strike angle, and kinematic variables associated with overstriding (Chapter 3). Finally, a similar but separate sample of female recreational runners considered to be at higher-risk of developing injury (peak braking force>0.27 BW) were enrolled in an eight-session gait retraining program using real-time biofeedback of the anterior-posterior (braking) ground reaction force (Chapter 4). Results: Peak braking force was associated with a five to eight-fold increased risk of running-related injury. Our findings suggest that the use of peak braking force may be a more effective target for gait retraining than vertical loading rate. Regression analysis of kinematic variables revealed that shortening step length and transitioning away from a rearfoot strike pattern are appropriate strategies to reduce peak braking force. An eight-session gait retraining program significantly reduced peak braking force, as well as vertical loading rates associated with running-related injury. This was achieved predominantly through a combination of increased step frequency and decreased step length. Conclusions: This dissertation provides new understanding of the role of kinetic risk factors—specifically peak braking force—in the development of running-related injury. Furthermore, it provides the structure for a larger randomized controlled trial to assess a gait retraining intervention to reduce peak braking force and running-related injury risk.
Direct metal nano-imprinting using embossed solid electrolyte stamp
Creators: name: Kumar, A
name: Hsu, K H
name: Jacobs, K E
name: Ferreira, P M
name: Fang, N X
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this paper, we report direct patterning of metal nanostructures using an embossed solid electrochemical stamp. Microforming of solid superionic stamps using Si templates-analogous to polymer patterning in nano-imprint lithography-is explored. Silver sulfide (Ag2S)-a superionic conductor with excellent micro-forming properties-is investigated as a candidate material. Important parameters of the superionic stamp, including mechanical behavior, material flow during forming, and feature recovery after embossing are studied. Excellent feature transferability during embossing as well as etching is observed. To illustrate the capability of this approach silver nano-antennas with gaps <10 nm were successfully fabricated. The possibility for large area patterning with stamp diameters >6 mm is also demonstrated. Embossing based metal patterning allows fabrication beyond two-dimensional nanofabrication and several patterning schemes are reported.
description: 11 pages (double spaced), 7 figures, 1 table, continuation of work submitted to MRS Spring 2009
Identification and analysis of galactic bars in DESI Legacy Imaging Surveys
Creators: name: Wang, Wenwen
name: Zhou, Zhimin
Publisher: name: arXiv
Year: 2025
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a comprehensive study of bar structures in the local Universe using data from the DESI Legacy Imaging Surveys. Through isophotal analysis of 232,142 galaxies, we identify bars and classify them into strong and weak categories based on normalized bar length, using a threshold of 0.4. We find a total bar fraction of 42.9%, rising to 62.0% in disk galaxies, with strong barred galaxies accounting for 30.0%. For barred galaxies in our sample, deprojected bar lengths are measured both in absolute terms and normalized by galaxy size. Most bars are found to have absolute lengths of 3-7 kpc, and normalized bar lengths concentrated around a median value of 0.4. Bar ellipticity mainly ranges from 0.2 to 0.6, with a median value of 0.3. Our analysis reveals a bimodal distribution of bar fractions with respect to galaxy color, with weak bars in our classification being more prevalent in intermediate-color systems. With respect to stellar mass, strong bars also present a bimodal distribution, while weak bars are distributed uniformly. Normalized bar length remains relatively stable across stellar masses, while absolute bar length positively correlates with stellar mass. Cross-validation with visual classifications from GZD catalog confirms a bar identification accuracy of 93%. These results validate our automated method for bar identification and measurement, demonstrating its reliability. Our findings underscore the importance of bars in galaxy evolution and highlight the potential of upcoming wide-field surveys to deepen our understanding of barred galaxies.
description: 18 pages, 10 figures, 1 table; accepted for publication in ApJ
A penalized regression framework for building polygenic risk models based on summary statistics from genome-wide association studies and incorporating external information
Creators: name: Chen, Ting-Huei
name: Chatterjee, Nilanjan
name: Landi, Maria Teresa
name: Shi, Jianxin
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: Large-scale genome-wide association (GWAS) studies provide opportunities for developing genetic risk prediction models that have the potential to improve disease prevention, intervention or treatment. The key step is to develop polygenic risk score (PRS) models with high predictive performance for a given disease, which typically requires a large training data set for selecting truly associated single nucleotide polymorphisms (SNPs) and estimating effect sizes accurately. Here, we develop a comprehensive penalized regression for fitting l1 regularized regression models to GWAS summary statistics. We propose incorporating Pleiotropy and ANnotation information into PRS (PANPRS) development through suitable formulation of penalty functions and associated tuning parameters. Extensive simulations show that PANPRS performs equally well or better than existing PRS methods when no functional annotation or pleiotropy is incorporated. When functional annotation data and pleiotropy are informative, PANPRS substantially outperforms existing PRS methods in simulations. Finally, we applied our methods to build PRS for type 2 diabetes and melanoma and found that incorporating relevant functional annotations and GWAS of genetically related traits improved prediction of these two complex diseases.
W-STEM Project Overview
Creators: name: García-Peñalvo, F. J.
Publisher: name: Zenodo
Year: 2019
Subjects: W-STEM; STEM; gender; Capacity Building

description: A general overview of the W-STEM project (funded by European Union. ERASMUS + Capacity-building in Higher Education Call for proposals EAC/A05/2017 - Ref. 598923-EPP-1-2018-1-ES-EPPKA2-CBHE-JP).

This was presented in the kick off meeting of this project, which was held in Salamanca (Spain) 25-27 March 2019.
New solutions to local and non-local elliptic equations
Creators: name: Chan, Hon To Hardy
Publisher: name: University of British Columbia
Year: 2018

description: We obtain a few existence results for elliptic equations. We develop in Chapter 2 a new infinite dimensional gluing scheme for fractional elliptic equations in the mildly non-local setting. Here it is applied to the catenoid. As a consequence of this method, a counter-example to a fractional analogue of De Giorgi conjecture can be obtained [51]. Then, in Chapter 3, we construct singular solutions to the fractional Yamabe problem using conformal geometry. Fractional order ordinary differential equations are studied. Finally, in Chapter 4, we obtain the existence to a suitably perturbed doublycritical Hardy–Schr¨odinger equation in a bounded domain in the hyperbolic space.
title: Κατασκευές από οπλισμένο σκυρόδεμα και πρόταση προσθήκης μεταλλικής κατασκευής
title: Reinforced concrete constructions and proposal of adding a metal structure
titleType: AlternativeTitle
Creators: name: Ορφανός, Ηλίας
name: Χριστοφυλάκης, Κωνσταντίνος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Κατασκευές
Οπλισμένο σκυρόδεμα
Μεταλλικές κατασκευές
Fespa
Στατική ανάλυση
ΚΑΝΕΠΕ
Οικονομική αποτίμηση

description: Στην παρούσα διπλωματική εργασία θα αναλυθεί η μέθοδος κατασκευής σύνθετων δομικών μελών, από οπλισμένο σκυρόδεμα και σιδηρά κατασκευή. Επίσης, θα ελεγχθεί η συμπεριφορά του σε σεισμό και σε άλλα φορτία, ενώ παράλληλα θα υπάρξει και οικονομική αποτίμηση, κάτω από το πλαίσιο του ΚΑΝΕΠΕ. Η εργασία χωρίζεται σε δυο μέρη. Στο πρώτο σκέλος γίνεται μια εκτενής αναφορά σε θεωρητικό επίπεδο, πάνω στο οπλισμένο σκυρόδεμα και στα μεταλλικά στοιχειά, καθώς και περιγραφή των βασικών αρχών του ΚΑΝΕΠΕ. Στο δεύτερο σκέλος, περιγράφεται η μελέτη του υφισταμένου κτηρίου από οπλισμένο σκυρόδεμα, καθώς και η προσθήκη του μεταλλικού φορέα σε αυτό. Επιπλέον, θα ακολουθήσει έλεγχος επάρκειας, ανάλυση των μελών και οικονομική αποτίμηση. Το πρόγραμμα που χρησιμοποιήθηκε για την ανάλυση του κτηρίου πρόκειται για το στατικό πρόγραμμα fespa.
Associated production of Z boson and a pair of new quarks at the LHC
Creators: name: Yang, Shuo
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The associated production of $Z$ boson and a pair of new quarks at the Large Hadron Collider (LHC) is studied. The cross sections for both sequential fermions and vector-like fermions are presented. It is found that for sequential fermions the cross sections can reach $1\sim 10^2$ fb for heavy quark mass $m_Q$ from 1000 GeV to 200 GeV. For vector-like quarks, the cross sections are suppressed by mixing parameter $\sinθ_L$. Focusing on process $pp \to b'b'$, we investigate the possibility of detecting the $6l+2j$ signal. For a $b'$ with light mass and a large branching ratio of $b'\to bZ$, it is found that only several signal events (parton level) can be produced with 1000 fb$^{-1}$ integrated luminosity. Although the signal events are rare, all the final states are produced centrally and multi lepton final states are clear at hadron collider, which could be easily detected.
description: 11 pages,5 figures, accepted by Communications in Theoretical Physics
Risk quantification for SARS-CoV-2 infection through airborne transmission in university settings
Creators: name: Ambatipudi, Mythri
name: Gonzalez, Paola Carrillo
name: Tasnim, Kazi
name: Daigle, Jordan T.
name: Kulyk, Taisa
name: Jeffreys, Nicholas
name: Sule, Nishant
name: Trevino, Rafael
name: He, Emily M.
name: Mooney, David J.
name: Koh, Esther
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: FOS: Biological sciences

description: The COVID-19 pandemic has significantly impacted learning as many institutions switched to remote or hybrid instruction. An in-depth assessment of the risk of infection that considers environmental setting and mitigation strategies is needed to make safe and informed decisions regarding reopening university spaces. A quantitative model of infection probability that accounts for space-specific parameters is presented to enable assessment of the risk in reopening university spaces at given densities. The model uses the fraction of the campus population that are viral shedders, room capacity, face covering filtration efficiency, air exchange rate, room volume, and time spent in the space as parameters to calculate infection probabilities in teaching spaces, dining halls, dorms, and shared bathrooms. The model readily calculates infection probabilities in various university spaces, with face covering filtration efficiency and air exchange rate being among the dominant variables. When applied to university spaces, this model demonstrated that, under specific conditions that are feasible to implement, in-person classes could be held in large lecture halls with an infection risk over the semester <1%. Meal pick-ups from dining halls and usage of shared bathrooms in residential dormitories among small groups of students could also be accomplished with low risk. The results of applying this model to spaces at Harvard University (Cambridge and Allston campuses) and Stanford University are reported. Finally, a user-friendly web application was developed using this model to calculate infection probability following input of space-specific variables. The successful development of a quantitative model and its implementation through a web application may facilitate accurate assessments of infection risk in university spaces. However, since this model is thus far unvalidated, validation using infection rate and contact tracing data from university campuses will be crucial as such data becomes available at larger scales. In light of the impact of the COVID-19 pandemic on universities, this tool could provide crucial insight to students, faculty, and university officials in making informed decisions.
Large scale EPR correlations and cosmic gravitational waves
Creators: name: Lamine, B.
name: Hervé, R.
name: Jaekel, M. -T.
name: Lambrecht, A.
name: Reynaud, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study how quantum correlations survive at large scales in spite of their exposition to stochastic backgrounds of gravitational waves. We consider Einstein-Podolski-Rosen (EPR) correlations built up on the polarizations of photon pairs and evaluate how they are affected by the cosmic gravitational wave background (CGWB). We evaluate the quantum decoherence of the EPR correlations in terms of a reduction of the violation of the Bell inequality as written by Clauser, Horne, Shimony and Holt (CHSH). We show that this decoherence remains small and that EPR correlations can in principle survive up to the largest cosmic scales.
description: 5 figures
Spectral properties of a class of random walks on locally finite groups
Creators: name: Bendikov, Alexander
name: Bobikau, Barbara
name: Pittet, Christophe
Publisher: name: arXiv
Year: 2011
Subjects: subject: Spectral Theory (math.SP)
subject: Group Theory (math.GR)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 2000: 60-02, 60B15, 62E10, 43A05

description: We study some spectral properties of random walks on infinite countable amenable groups with an emphasis on locally finite groups, e.g. the infinite symmetric group. On locally finite groups, the random walks under consideration are driven by infinite divisible distributions. This allows us to embed our random walks into continuous time Lévy processes whose heat kernels have shapes similar to the ones of alpha-stable processes. We obtain examples of fast/slow decays of return probabilities, a recurrence criterion, exact values and estimates of isospectral profiles and spectral distributions, formulae and estimates for the escape rates and for heat kernels.
description: 62 pages, 1 figure, 2 tables
title: Κάστρο Χλεμούτσι : η ιστορική και ψηφιακή απεικόνισή του
title: Chlemoutsi Castle : historical and digital representation
titleType: AlternativeTitle
Creators: name: Τσουραπάς, Νικόλαος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Κάστρο Χλεμούτσι
subject: Ιστορία
subject: Αρχιτεκτονική
subject: Ψηφιακή απεικόνιση
subject: Πολιτισμική κληρονομιά
subject: Τεχνολογία
subject: Εξερεύνηση

description: Το Κάστρο Χλεμούτσι, ένα εμβληματικό ιστορικό μνημείο που αγκαλιάζει το παρελθόν της περιοχής, αναδεικνύεται μέσα από τον συνδυασμό της ιστορίας και της ψηφιακής απεικόνισης. Χτισμένο στην κορυφή ενός λόφου, το Κάστρο Χλεμούτσι στέκεται σαν μάρτυρας των περασμένων αιώνων, με έντονη παρουσία που προκαλεί δέος. Η ιστορική του πορεία εκτείνεται από την αρχαιότητα έως τη σύγχρονη εποχή, καταγράφοντας επαναστάσεις, κατακτήσεις και πολιτιστικές αλλαγές. Η αρχιτεκτονική του αποτελεί συνδυασμό μεσαιωνικών και βενετσιάνικων χαρακτηριστικών, αντανακλώντας τον πολυποίκιλο πολιτισμό που διαμορφώθηκε στην περιοχή. Η ψηφιακή απεικόνιση του Κάστρου Χλεμούτσι ανοίγει νέες πύλες στην κατανόηση του πολιτιστικού του πλούτου. Με τη χρήση σύγχρονων τεχνολογιών, οι επισκέπτες μπορούν να εξερευνήσουν τα αρχαία τοιχώματα και τους πυργώνες με έναν εντυπωσιακό τρόπο. Η ψηφιακή αφήγηση αναδεικνύει τα μυστικά του Κάστρου, προσφέροντας ένα ταξίδι στην ιστορία που συναντά τη σύγχρονη τεχνολογία.
Screening the Optimal Loading of a Pt-Catalyzed Zeolite for Hydrogen Isotope Exchange
Creators: name: Ruiz-Yi, Benjamin
name: Angelette, Lucas M.
name: Beaumont, Paul R.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Space Science
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Computational Biology

description: The separation of tritiated sources from the exhaust stream of a nuclear fusion system remains a key area of study. While current hydrogen isotope separation technologies are effective at separating gaseous elemental hydrogen, they require additional costly and time-intensive electrolysis steps to be applied toward tritiated water. Previous work has proposed a capture and exchange method, which this work has applied to screen for an optimal weight loading of platinum onto a zeolite molecular sieve. Several samples of various weight loadings were cycled using a series of isotope exchange processes, and it was determined that a weight loading between 0.65 to 0.80 wt% Pt is optimal to separate heavier isotopes of hydrogen from a water waste stream.
"TURLI XIL TA'LIM SHAROITIDA FAOL TA'LIM VA MUAMMOLI TA'LIMNING SAMARADORLIGI"
Creators: name: Shoxafizova, Nodina
Publisher: name: Zenodo
Year: 2024

description:  Ta'lim har bir jamiyatda muhim rol o'ynaydi. Bu nafaqat bilim berish, balki shaxsni shakllantirish, uning fikrlash tarzini rivojlantirish va kelajakda muvaffaqiyatli faoliyat yuritishi uchun zarur ko'nikmalarni berish jarayonidir. Ta'limning samaradorligini oshirish uchun turli usullar va yondashuvlar mavjud. Faol ta'lim va muammoli ta'lim — bu zamonaviy ta'lim tizimida muhim o'rin tutuvchi metodlardir. Ushbu maqolada, turli ta'lim sharoitlarida faol va muammoli ta'limning samaradorligi tahlil qilinadi.
Black hole entropy in scalar-tensor and f(R) gravity: an overview
Creators: name: Faraoni, Valerio
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A short overview of black hole entropy in alternative gravitational theories is presented. Motivated by the recent attempts to explain the cosmic acceleration without dark energy, we focus on metric and Palatini f(R) gravity and on scalar-tensor theories.
description: 24 pages, latex, to appear in "Entropy in Quantum Gravity", special issue of Entropy, R. Garattini editor.
title: Business BPM und Systemtheorie: Die Realität der Modelle
title: Warum Modelle nicht als vollständig beschrieben werden können
titleType: Subtitle
Creators: name: Lorünser, Stefan
Publisher: name: FH Vorarlberg (Fachhochschule Vorarlberg)
Year: 2021
Subjects: subject: 650 Management

description: Die vorliegende Masterarbeit beleuchtet die Realität der Modellierung in der Geschäftspraxis und die Probleme, auf die Unternehmen in diesem Zusammenhang stoßen. Aus diesem Grund wird diese Arbeit die Forschungsfrage, wie Unternehmen mit dem Wissen der Systemtheorie Probleme in der Modellentwicklung vermeiden können, samt der daraus abgeleiteten Teilfragen beantworten. Diese Teilfragen zielen sowohl darauf ab, ob Modelle als Abbilder der Realität betrachtet werden können, und welche Entscheidungen ein Unternehmen zu treffen hat, um Modelle richtig zu adressieren. Diese Arbeit richtet sich vor allem an Unternehmen und Studenten des Geschäftsprozessmanagements, sowie alle interessierte Leser und Leserinnen, die sich die Frage stellen, wie die Modellbildung mit dem Wissen der Systemtheorie optimiert werden kann. Mittels intensiver Literaturrecherche und Auswahl wird aufgezeigt, dass niemals alle Eigenschaften eines Systems in ein Modell einfließen können und dürfen. Des Weiteren wird die Wichtigkeit einer guten Zielgruppenanalyse und -definition herausgearbeitet, um sowohl Modellierungssprache, Grenzen und Zweck des Modells korrekt wiederzugeben und so alle Adressaten mit den richtigen Informationen zu erreichen. Die in dieser Arbeit vermittelten Informationen haben das Potential, die Realität eines Unternehmens sinnvoll zu einem Modell und zum Ausschnitt der Wirklichkeit werden zu lassen.
description: This master thesis highlights the reality of modelling in business practice and the problems companies encounter in this context. For this reason this thesis will answer the leading question of how companies can use the knowledge of systems theory to avoid problems in model development together with the sub-questions derived from this. These sub-questions aim at both whether models can be considered as representations of reality and which decisions a company has to make in order to address models correctly. This work is primarily aimed at companies and students of business process management, as well as all interested readers who ask themselves how model building can be optimised with knowledge of systems theory. By means of intensive literature research and selection it is shown it is shown that a model cannot and must not include all properties of a system. Furthermore, the importance of a good target group analysis and target definition is elaborated in order to correctly reflect the modelling language, limits and purpose of the model and to thus reach all addressees with the right information. This work conveys informationen that has the potential to derive a model based on company’s reality and at the same time transform it into an excerpt of the true situation.
title: Behavioral Economics und Business Analytics
title: Einfluss von kognitionspsychologischen Phänomenen des Verhaltens in der Business Analytics
titleType: Subtitle
Creators: name: Zapata Patiño, Alejandra
Publisher: name: FH Vorarlberg (Fachhochschule Vorarlberg)
Year: 2021
Subjects: subject: 650 Management

description: Die schnelllebige und sich verändernde Welt, in der die Menschen gegenwärtig leben, stellt Unternehmen ständig vor neue Herausforderungen. Der Wettbewerb wird immer anspruchsvoller und das Hervorstechen in jeder Branche ist von zahlreichen Faktoren abhängig. Einer davon, der zweifellos einen der grundlegenden Schlüssel zum Erfolg darstellt, ist die Entscheidungsfindung. Um letztere zu unterstützen, werden verschiedene Systeme geschaffen. Unter diesen Systemen lassen sich Business-Analytics-Systeme finden, deren Aufgabe sich auf die Umwandlung von Daten in Informationen konzentriert, um Evidenzen zu schaffen, die es den Managern ermöglicht, Entscheidungen auf der Grundlage von Daten – und nicht auf derjenigen von Intuition – zu treffen. Es ist jedoch Folgendes festzustellen: Obwohl diese Systeme immer besser werden, ist die Mehrheit der Manager in vielen Unternehmen nicht in der Lage, effektive Entscheidungen zu treffen. Daher ist es das Ziel dieser Arbeit, den Personen in der Wirtschaftswelt eine Untersuchung und Analyse der kognitiven verhaltenspsychologischen Phänomene zur Verfügung zu stellen, um festzulegen, welche dieser Phänomene beim Treffen von Entscheidungen im Rahmen von Business Analytics auftreten und ein Problem verursachen können. Dazu wird die folgende Forschungsfrage gestellt: Welchen Einfluss haben die kognitionspsychologischen Phänomene des Verhaltens in der Business Analytics? Um diese zu beantworten, ist eine systematische Literaturrecherche durchgeführt worden. Die Analyse der Phänomene anhand eines Data-Mining-Vorgehensmodells (CRISP-DM) zeigte, dass der Einfluss der Phänomene auf Business Analytics signifikant ist und sich auf mehrere Aspekte der Analytik bezieht.
The world's oldest-known promontory fort: Amnya and the acceleration of hunter-gatherer diversity in Siberia 8000 years ago
Creators: name: Piezonka, Henny
name: Chairkina, Natalya
name: Dubovtseva, Ekaterina
name: Kosinskaya, Lyubov
name: Meadows, John
name: Schreiber, Tanja
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Mesolithic
subject: Neolithic
subject: Eurasia
subject: radiocarbon dating
subject: palaeoenvironment
subject: 8.2 ka event
subject: fortification
subject: 900 Geschichte und Geografie::930 Geschichte des Altertums (bis ca. 499), Archäologie::930 Geschichte des Altertums bis ca. 499, Archäologie

description: Archaeological narratives have traditionally associated the rise of social and political ‘complexity’ with the emergence of agricultural societies. However, this framework neglects the innovations of the hunter-gatherer populations occupying the Siberian taiga 8000 years ago, including the construction of some of the oldest-known fortified sites in the world. Here, the authors present results from the fortified site of Amnya in western Siberia, reporting new radiocarbon dates as the basis for a re-evaluation of the chronology and settlement organisation. Assessed within the context of the changing social and environmental landscape of the taiga, Amnya and similar fortified sites can be understood as one facet of a broader adaptive strategy.
Formulation of the Spinor Field in the Presence of a Minimal Length Based on the Quesne-Tkachuk Algebra
Creators: name: Moayedi, S. K.
name: Setare, M. R.
name: Moayeri, H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In 2006 Quesne and Tkachuk (J. Phys. A: Math. Gen. {\bf 39}, 10909, 2006) introduced a (D+1)-dimensional $(β,β')$-two-parameter Lorentz-covariant deformed algebra which leads to a nonzero minimal length. In this work, the Lagrangian formulation of the spinor field in a (3+1)-dimensional space-time described by Quesne-Tkachuk Lorentz-covariant deformed algebra is studied in the case where $β'=2β$ up to first order over deformation parameter $β$. It is shown that the modified Dirac equation which contains higher order derivative of the wave function describes two massive particles with different masses. We show that physically acceptable mass states can only exist for $β
description: 11 pages, no figure
title: Kontrollierte Vokabularien und historische Semantiken
title: Zur editionsphilologischen Verwendung digitaler Thesauri
titleType: Subtitle
Creators: name: Hegel, Philipp
name: Krewet, Michael
name: Brandl, Simon
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: kontrollierte Vokabularien
subject: historische Semantiken
subject: digitale Thesauri
subject: 800 Literatur::800 Literatur, Rhetorik, Literaturwissenschaft::802 Verschiedenes

description: ontrolled vocabularies are a common component in applications of linked data in order to connect digital resources. There are applications in the Humanities and digital editions, too. Two scenarios are described in some detail. The first concerns the analysis of annotations on manuscripts of Aristotle’s De interpretatione. In conjunction with transcriptions, the usage of authority files in metadata as well of domain specific vocabularies helps in this example to find stemmatological relations between glosses and diagrams in some of the manuscripts. The second example is not about a text-critical application but about the creation of the thesaurus for a commentary on Michael Maier’s Atalanta fugiens, that is a multimodal, figurative and dense written book by today’s standards. The question is raised as to what extent a controlled vocabulary with its concepts and the implicit semantics of the relations between them can be of a heuristic value for the reconstruction of this historical, alchemical concepts in its dynamics and alterity.
Schellinger House, Amagansett, Long Island, N. Y. Postcard
Creators: name: Kelsey, Carleton
name: Amagansett Historical Association
Publisher: name: Unknown
Year: 0
Subjects: Photographs
Dwellings
Windmills
Structures
Buildings
Postcards

description: This postcard shows an exterior view of the Schellinger House in Amagansett. A windmill can be seen in the background. This photograph was either taken or collected by Amagansett historian and librarian Carleton Kelsey.
description: This photograph is part of the collection of the Carleton Kelsey Collection of the Amagansett Historical Association. Kelsey was a local historian and librarian who collected photographs from others to add to the many photographs he took of the community himself.
How textbooks published in Europe and in the United States explain the Spanish subjunctive : a comparative study
Creators: name: Cortiana, Giulia
Publisher: name: University of British Columbia
Year: 2018

description: The present Master’s thesis aims to be a comparative study of two corpora regarding textbooks used to teach Spanish as an additional language. Corpus 1 includes 20 textbooks that are used in Italy and Spain (10 textbooks for each country), while Corpus 2 includes 20 textbooks that are used in the United States and Canada. My investigation analyzes how course-book authors decide to explain the complex grammatical topic of the Spanish subjunctive. The research questions that drive my investigation are related to three different aspects of the explanation. The first regards what features textbook writers emphasize, the second concerns the use of visual elements and layout, and the third one analyses the use (or lack) of context in order to present the target construction. Results show that textbook writers in Europe address a different kind of student population than those of the US and Canada. Therefore, the approaches that are reflected in the corpora present more differences than similarities. This Master’s thesis ends with a suggestion for textbook writers in the United States, Canada, Italy, and Spain, and for future studies.
Growth of uniform helium submonolayers adsorbed on single-surface graphite observed by surface X-ray diffraction
Creators: name: Kumashita, Atsuki
name: Tajiri, Hiroo
name: Usami, Jun
name: Yamane, Yu
name: Miyasaka, Shigeki
name: Fukuyama, Hiroshi
name: Yamaguchi, Akira
Publisher: name: arXiv
Year: 2025
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We observed surface X-ray diffraction from He-4 submonolayers adsorbed on a single-surface graphite using synchrotron X-rays. Time evolutions of scattering intensities along the crystal truncation rod (CTR) were observed even after reaching the base low temperature in a selected condition of sample preparation. Our simulations for CTR scatterings based on the random double-layer model, in which helium atoms are distributed randomly in the first and second layers with a certain occupancy ratio, can consistently explain the observed intensity changes. These results support the scenario that He atoms are stratified initially as a nonequilibrium state and then relaxed into a uniform monolayer by surface diffusion, where the relaxation process was observed as a decrease in CTR scattering intensity. The observed time constant was, however, much longer than those estimated from quantum and thermal surface diffusions. This implies homogeneous processes in surface diffusions were strongly suppressed by local potentials in such as atomic steps or microcrystalline boundaries.
description: 9 pages, 3 figures, to be published in Journal of Low Temperature Physics
Simultaneous solution of Kompaneets equation and Radiative Transfer equation in the photon energy range 1 - 125 KeV
Creators: name: Peraiah, A.
name: Rao, M. Srinivasa
name: varghese, B. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Radiative transfer equation in plane parallel geometry and Kompaneets equation is solved simultaneously to obtain theoretical spectrum of 1-125 KeV photon energy range. Diffuse radiation field is calculated using time-independent radiative transfer equation in plane parallel geometry, which is developed using discrete space theory (DST) of radiative transfer in a homogeneous medium for different optical depths. We assumed free-free emission and absorption and emission due to electron gas to be operating in the medium. The three terms $n, n^2$ and $\displaystyle \bigg({\frac {\partial n}{\partial x_k}}\bigg)$ where $n$ is photon phase density and $\displaystyle x_k= \bigg({\frac {h ν} {k T_e}} \bigg) $, in Kompaneets equation and those due to free-free emission are utilized to calculate the change in the photon phase density in a hot electron gas. Two types of incident radiation are considered: (1) isotropic radiation with the modified black body radiation $I^{MB}$ [1] and (2) anisotropic radiation which is angle dependent. The emergent radiation at $τ=0$ and reflected radiation $τ=τ_{max}$ are calculated by using the diffuse radiation from the medium. The emergent and reflected radiation contain the free-free emission and emission from the hot electron gas. Kompaneets equation gives the changes in photon phase densities in different types of media. Although the initial spectrum is angle dependent, the Kompaneets equation gives a spectrum which is angle independent after several Compton scattering times.
description: 31 pages, 8 figures, Accepted
Reply to "Comment on 'Insensitivity of Hawking radiation to an invariant Planck-scale cutoff' "
Creators: name: Agullo, Ivan
name: Navarro-Salas, Jose
name: Olmo, Gonzalo J.
name: Parker, Leonard
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We clarify the relationship between the conclusions of the previous Comment of A. Helfer [1] and that of our Brief Report [arXiv:0906.5315]
description: 3 pages, to appear in Phys. Rev. D.
Convergence Analysis of Differential Evolution Variants on Unconstrained Global Optimization Functions
Creators: name: Shanmugavelayutham, G. Jeyakumar C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: In this paper, we present an empirical study on convergence nature of Differential Evolution (DE) variants to solve unconstrained global optimization problems. The aim is to identify the competitive nature of DE variants in solving the problem at their hand and compare. We have chosen fourteen benchmark functions grouped by feature: unimodal and separable, unimodal and nonseparable, multimodal and separable, and multimodal and nonseparable. Fourteen variants of DE were implemented and tested on fourteen benchmark problems for dimensions of 30. The competitiveness of the variants are identified by the Mean Objective Function value, they achieved in 100 runs. The convergence nature of the best and worst performing variants are analyzed by measuring their Convergence Speed (Cs) and Quality Measure (Qm).
description: 12 Pages, 1 Figure, 10 Tables
A machine learning framework for temporal enhanced ultrasound guided prostate cancer diagnostics
Creators: name: Azizi, Shekoofeh
Publisher: name: University of British Columbia
Year: 2018

description: The ultimate diagnosis of prostate cancer involves histopathology analysis of tissue samples obtained through prostate biopsy, guided by either transrectal ultrasound (TRUS), or fusion of TRUS with multi-parametric magnetic resonance imaging. Appropriate clinical management of prostate cancer requires accurate detection and assessment of the grade of the disease and its extent. Despite recent advancements in prostate cancer diagnosis, accurate characterization of aggressive lesions from indolent ones is an open problem and requires refinement. Temporal Enhanced Ultrasound (TeUS) has been proposed as a new paradigm for tissue characterization. TeUS involves analysis of a sequence of ultrasound radio frequency (RF) or Brightness (B)-mode data using a machine learning approach. The overarching objective of this dissertation is to improve the accuracy of detecting prostate cancer, specifically the aggressive forms of the disease and to develop a TeUS-augmented prostate biopsy system. Towards full-filling this objective, this dissertation makes the following contributions: 1) Several machine learning techniques are developed and evaluated to automatically analyze the spectral and temporal aspect of backscattered ultrasound signals from the prostate tissue, and to detect the presence of cancer; 2) a patient-specific biopsy targeting approach is proposed that displays near real-time cancer likelihood maps on B-mode ultrasound images augmenting their information; and 3) the latent representations of TeUS, as learned by the proposed machine learning models, are investigated to derive insights about tissue dependent features residing in TeUS and their physical interpretation. A data set consisting of biopsy targets in mp-MRI-TRUS fusion-biopsies with 255 biopsy cores from 157 subjects was used to generate and evaluate the proposed techniques. Clinical histopathology of the biopsy cores was used as the gold-standard. Results demonstrated that TeUS is effective in differentiating aggressive prostate from clinically less-significant disease and non-cancerous tissue. Evidence derived from simulation and latent-feature visualization showed that micro-vibrations of tissue microstructure, captured by low-frequency spectral features of TeUS, is a main source of tissue-specific information that can be used for detection of prostate cancer.
Stability and bifurcations in neural fields with axonal delay and general connectivity
Creators: name: Atay, Fatihcan M.
name: Hutt, Axel
Publisher: name: Weierstrass Institute
Year: 2003
Subjects: subject: synaptic networks
subject: non-local interaction
subject: delay
subject: bifurcations
subject: spatial patterns
subject: travelling waves
subject: 92C20

description: A stability analysis is presented for neural field equations in the presence of axonal delays and for a general class of connectivity kernels and synaptic properties. Sufficient conditions are given for the stability of equilibrium solutions. It is shown that the delays play a crucial role in non-stationary bifurcations of equilibria, whereas the stationary bifurcations depend only on the kernel. Bounds are determined for the frequencies of bifurcating periodic solutions. A perturbative scheme is used to calculate the types of bifurcations leading to spatial patterns, oscillatory solutions, and traveling waves. For high transmission speeds a simple method is derived that allows the determination of the bifurcation type by visual inspection of the Fourier transforms of the connectivity kernel and its first moment. Results are numerically illustrated on a class of neurologically plausible second order systems with combinations of Gaussian excitatory and inhibitory connections.
Excitonic Rayleigh scattering spectra of metallic single-walled carbon nanotubes
Creators: name: Malic, Ermin
name: Maultzsch, Janina
name: Reich, Stephanie
name: Knorr, Andreas
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We have performed microscopic calculations of the Rayleigh scattering cross section for arbitrary metallic single-walled carbon nanotubes. The focus of our investigations lies on excitonic effects and their influence on the characteristic features in a Rayleigh scattering spectrum. Our approach is based on density matrix theory including tight-binding energies, the carrier-light coupling as well as the carrier-carrier interaction. Due to the refractive index contribution to the scattering cross section, we observe characteristic features in Rayleigh spectra, such as a strong deviation from the Lorentz peak shape and the larger oscillator strength of the lower-lying transition $M_{ii}^-$ in the double-peaked structure, independently of the chiral angle and the diameter of the investigated nanotubes. We observe excitonic binding energies in the range of $\unit[60-80]{meV}$ for metallic nanotubes with diameters of $\unit[1.5-2.5]{nm}$. The overlap of the excitonic transition with the close-by continuum has a significant influence on the peak shape and a minor influence on the peak intensity ratios. The presented results are in good agreement with recent experimental data.
Miss Amelia's Cottage
Creators: name: Kelsey, Carleton
name: Amagansett Historical Association
Publisher: name: Unknown
Year: 1942
Subjects: Photographs
Dwellings
Buildings
Structures
Schellinger Family

description: This images shows a exterior view of Miss Amelia Schellinger's cottage. The reverse side of this image notes that this image was taken in 1942. This photograph was either taken or collected by Amagansett historian and librarian Carleton Kelsey.
description: This photograph is part of the collection of the Carleton Kelsey Collection of the Amagansett Historical Association. Kelsey was a local historian and librarian who collected photographs from others to add to the many photographs he took of the community himself.