cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
การศึกษารูปแบบการนิเทศการจัดประสบการณ์การเรียนรู้เพื่อพัฒนาทักษะกระบวนการทางวิทยาศาสตร์ขั้นพื้นฐานสำหรับครูผู้สอนระดับปฐมวัย ในโรงเรียนเอกชนประเภทสามัญศึกษา สังกัดสำนักงานศึกษาธิการจังหวัดชัยภูมิ
Creators: name: วิธวิทย์  ประสานศักดิ์ทวี
Publisher: name: คณะเทคโนโลยีคหกรรมศาสตร์ มหาวิทยาลัยเทคโนโลยีราชมงคลธัญบุรี
Year: 2023
Subjects: รูปแบบการนิเทศการศึกษา
การศึกษาด้วยตนเอง
การนิเทศแบบให้คำชี้แนะ

description: วารสารเทคโนโลยีคหกรรมศาสตร์และนวัตกรรม, 2, 1, ต.ค.-20
ผลของการจัดกิจกรรมศิลปะสร้างสรรค์ที่มีต่อการส่งเสริมความเชื่อมั่นในตนเองของนักเรียนระดับชั้นอนุบาลปีที่ 1
Creators: name: รัตภรณ์   อุทุมพร
Publisher: name: คณะเทคโนโลยีคหกรรมศาสตร์ มหาวิทยาลัยเทคโนโลยีราชมงคลธัญบุรี
Year: 2023
Subjects: กิจกรรมศิลปะสร้างสรรค์
ความเชื่อมั่นในตนเอง
อนุบาลปีที่ 1

description: วารสารเทคโนโลยีคหกรรมศาสตร์และนวัตกรรม, 2, 1, 21-30
Transfer Learning for Underrepresented Music Generation
Creators: Doosti Sanjani, Anahita
Publisher: name: University of Alberta Library
Year: 2023

The increasing popularity of Deep Neural Networks (DNN) has led to their application to many domains, including Music Generation. However, these large DNN-based models are heavily dependent on their training dataset, which means they perform poorly on musical genres that are out-of-distribution (OOD) for that dataset. This heavily limits these systems' practical use and essentially requires the model to be retrained on a large dataset containing a musical genre in order to recreate it. In many domains, transfer learning has been effective at adapting an existing model to a new target dataset of a much smaller size by training for a much shorter period. However, such an approach remains underexplored in the domain of music generation. To investigate the viability of this approach, we explored different genres that might represent OOD genres for a DNN-based music generator. Consequently, we identified Iranian folk music as an example of such a genre of music. This was in line with the fact that this genre has a melodic structure different from music based on Western music theory principles. We then proceeded to collect a dataset of Iranian folk music and utilize it to explore different methods of transfer learning to improve the performance of MusicVAE, a large generative music model with a DNN architecture. We identify a transfer learning approach that allows us to efficiently adapt MusicVAE to the Iranian folk music dataset, which indicates a potential for the future generation of underrepresented music genres.
Sonnenfleckenzeichnung Nr. 91.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 13.05.2015, 09:00, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Tight Frame with Hahn and Krawtchouk Polynomials of Several Variables
Creators: name: Xu, Yuan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33C50, 42C15

description: Finite tight frames for polynomial subspaces are constructed using monic Hahn polynomials and Krawtchouk polynomials of several variables. Based on these polynomial frames, two methods for constructing tight frames for the Euclidean spaces are designed. With ${\mathsf r}(d,n):= \binom{n+d-1}{n}$, the first method generates, for each $m \ge n$, two families of tight frames in ${\mathbb R}^{{\mathsf r}(d,n)}$ with ${\mathsf r}(d+1,m)$ elements. The second method generates a tight frame in ${\mathbb R}^{{\mathsf r}(d,N)}$ with $1 + N \times{\mathsf r}(d+1, N)$ vectors. All frame elements are given in explicit formulas.
การสำรวจพฤติกรรมการบริโภคและปัจจัยที่มีผลต่อการเลือกซื้อผลิตภัณฑ์ชานมไข่มุกของนักศึกษาสาขาวิชาอาหารและโภชนาการในช่วงระหว่างที่มีสถานการณ์การระบาดของโรคโควิด-19
Creators: name: เมทณี นพคุณ
Publisher: name: คณะเทคโนโลยีคหกรรมศาสตร์ มหาวิทยาลัยเทคโนโลยีราชมงคลธัญบุรี
Year: 2023
Subjects: พฤติกรรมการบริโภค
ปัจจัยที่มีผลต่อการเลือกซื้อผลิตภัณฑ์
ชานมไข่มุก
โควิด-19

description: วารสารเทคโนโลยีคหกรรมศาสตร์และนวัตกรรม, 2, 1, 31-47
การพัฒนากระเป๋าแฟชั่นจากกาบหมากเสริมหนังเทียม
Creators: name: อนุชิต ทิพย์มงคล
Publisher: name: คณะเทคโนโลยีคหกรรมศาสตร์ มหาวิทยาลัยเทคโนโลยีราชมงคลธัญบุรี
Year: 2023
Subjects: กระเป๋าแฟชั่น
กาบหมาก
หนังเทียม

description: วารสารเทคโนโลยีคหกรรมศาสตร์และนวัตกรรม, 2, 1, 48-57
Sonnenfleckenzeichnung Nr. 187.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.09.2015, 08:45, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 43.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 05.03.2015, 08:30, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 1.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
การพัฒนาผลิตภัณฑ์โมเสกธรรมชาติจากเปลือกฝักมะรุมเพื่องานประดิษฐ์
Creators: name: วรรณเพ็ญ ปิ่นประดับ
Publisher: name: คณะเทคโนโลยีคหกรรมศาสตร์ มหาวิทยาลัยเทคโนโลยีราชมงคลธัญบุรี
Year: 2023
Subjects: โมเสกธรรมชาติ
เปลือกฝักมะรุม
งานประดิษฐ์

description: วารสารเทคโนโลยีคหกรรมศาสตร์และนวัตกรรม, 2, 1, 58-64
The classification of Nichols algebras over groups with finite root system of rank two
Creators: name: Heckenberger, I.
name: Vendramin, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16T05, 20F55

description: We classify all groups G and all pairs (V,W) of absolutely simple Yetter-Drinfeld modules over G such that the support of the direct sum of V and W generates G, the square of the braiding between V and W is not the identity, and the Nichols algebra of the direct sum of V and W admits a finite root system. As a byproduct, we determine the dimensions of such Nichols algebras, and several new families of finite-dimensional Nichols algebras are obtained. Our main tool is the Weyl groupoid of pairs of absolutely simple Yetter-Drinfeld modules over groups.
description: 41 pages. Final version. Accepted for publication in Journal of the European Mathematical Society
Sonnenfleckenzeichnung Nr. 210.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 08.10.2015, 09:45, erstellt von Andrea Manna
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
การพัฒนาเสื้อผ้าชุดสำหรับครอบครัวจากผ้าฝ้ายทอมือ บ้านจันเสน จังหวัดนครสวรรค์
Creators: name: อุไรวรรณ  คำสิงหา
Publisher: name: คณะเทคโนโลยีคหกรรมศาสตร์ มหาวิทยาลัยเทคโนโลยีราชมงคลธัญบุรี
Year: 2023
Subjects: เสื้อผ้าชุด
ครอบครัว
ผ้าฝ้ายทอมือ
บ้านจันเสน

description: วารสารเทคโนโลยีคหกรรมศาสตร์และนวัตกรรม, 2, 1, 65-75
Second-Order Asymptotics for the Classical Capacity of Image-Additive Quantum Channels
Creators: name: Tomamichel, Marco
name: Tan, Vincent Y. F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study non-asymptotic fundamental limits for transmitting classical information over memoryless quantum channels, i.e. we investigate the amount of classical information that can be transmitted when a quantum channel is used a finite number of times and a fixed, non-vanishing average error is permissible. We consider the classical capacity of quantum channels that are image-additive, including all classical to quantum channels, as well as the product state capacity of arbitrary quantum channels. In both cases we show that the non-asymptotic fundamental limit admits a second-order approximation that illustrates the speed at which the rate of optimal codes converges to the Holevo capacity as the blocklength tends to infinity. The behavior is governed by a new channel parameter, called channel dispersion, for which we provide a geometrical interpretation.
description: v2: main results significantly generalized and improved; v3: extended to image-additive channels, change of title, journal version
Yukawa Corrections to Higgs Production in Top Partner Models
Creators: name: Dawson, Sally
name: Furlan, Elisabetta
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Higgs production from gluon fusion is sensitive to the properties of heavy colored fermions and to the Yukawa couplings, (Y_F M_F)/v, of these particles to the Higgs boson. We compute the two--loop, ${\cal O}((Y_F M_F)^3/v^3)$ contributions of new high mass fermions to Higgs production. In the Standard Model, these contributions are part of the well-known electroweak corrections and are negligible. However, in models with TeV scale fermions, such as top partner or composite models, Yukawa corrections are enhanced by effects of ${\cal O}((Y_F M_F)^3/v^3)$ and are potentially significant due to the large mass of the new quarks. We examine the size of these top partner Yukawa corrections to Higgs production for parameter choices which are allowed by precision electroweak constraints.
description: 27 pages, 7 figures, matches the published version
Quartic Quasi-topological Gravity, Black Holes and Holography
Creators: name: Dehghani, M. H.
name: Vahidinia, M. H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we derive the field equations of quartic quasi-topological gravity by varying the action with respect to the metric. Also, we obtain the linearized graviton equations in the AdS background and find that it is governed by a second-order field equation as in the cases of Einstein, Lovelock or cubic quasi-topological gravities. But in contrast to the cubic quasi-topological gravity, the linearized field equation around a black hole has fourth-order radial derivative of the perturbation. Moreover, we analyze the conditions of having ghost free AdS solutions and AdS planar black holes. In addition, we compute the central charges of the dual conformal field theory of this gravity theory by studying holographic Weyl anomaly. Finally, we consider the effect of quartic term on the causality of dual theory in the tensor channel and show that, in the contrast to the trivial result of cubic quasi-topological gravity, the existence of both cubic and quartic terms leads to a non-trivial constraint. However, this constraint does not imply any lower positive bound on the viscosity/entropy ratio.
description: 27 pages, 14 figures, minor typos corrected, a comment on bulk causality is added, updated to published version
Alzheimer’s Dementia Detection Through Machine Learning: Analyzing Linguistic and Acoustic Features in Spontaneous Speech
Creators: Shah, Zehra
Publisher: name: University of Alberta Library
Year: 2023

With the rapid aging of the world’s population, the global burden of aging related mental disorders, such as Alzheimer’s dementia (AD), is also on the rise. Unfortunately global healthcare systems are vastly under-resourced, which means that many people who need mental health services are unable to receive it. There is a critical need for timely, inexpensive, objective and scalable mental health screening and monitoring methodologies to augment currently available diagnostic tools. Speech analysis has the potential to be utilized as a window into the state of the human mind, meaning it could provide support for timely, reliable, and objective screening of many psychiatric disorders including AD.

In this dissertation, we present our research on machine learned models that can diagnose AD based on linguistic and acoustic features derived from speech. We show that AD can be detected reliably from spontaneous speech samples, and that this can be done even independently of the language spoken. The first part of this thesis presents machine learned models based on linguistic and acoustic features derived from spontaneous English speech samples. We find that linguistic features alone perform well, reaching 85% balanced accuracy on a hold-out test set, and ensemble models based on linguistic and acoustic features show comparable or slightly lower accuracy. The second part presents models that use features derived from measures of speech rate, complexity and intelligibility, this time in a cross-lingual setting (training on English speech samples and testing on Greek speech samples). These learned models, despite the significant domain shift between the training and test sets, reached a relatively high balanced accuracy of 70%, showing that AD detection from speech is possible even across two different languages. Furthermore, we provide some exploratory data analyses of the features derived in the cross-lingual experimental setting, and show that some of these features have a visibly discriminating pattern that can be successfully utilized for clustering the samples.

This work paves the way for building automated machine learned systems for detecting and monitoring AD. With further validation on larger and more diverse data sets, such systems have the potential of being deployed at scale to flag early signs of AD and monitor the progression of AD severity.
A Search for Dark Matter Interactions in the DEAP 3600 Detector Using Fiducial Masses Ranging from 1433 to 2966 kg
Creators: Farahani, Sina Safarabadi
Publisher: name: University of Alberta Library
Year: 2023

The DEAP-3600 detector is a single-phase direct-detection Dark Matter (DM) experiment located 2 km underground at SNOLAB in Sudbury, Canada. The detector consists of 3279 kg of liquid Argon contained in a spherical acrylic vessel. DEAP-3600 was specifically designed to search for direct detection of dark matter candidates known as Weakly-Interacting Massive Particles (WIMPs).

Radioisotope surface activity is a major source of background in dark matter experiments, and most experiments use a fiducial volume to remove these events, which reduces signal acceptance. The second result of DEAP-3600 published in 2019, used a fiducial radius of 630 mm reducing the detector volume by nearly 60%. Instead of only relying on position reconstruction algorithms and using a strict fiducial volume to

remove surface background events, we designed a new veto algorithm to identify these events. This approach will enable us to tag and veto surface events and expand the fiducial volume up to 820 mm to increase signal acceptance and improve the limits we can set on the WIMP-nucleus cross-section. Using 386 live-days of physics data and a WIMP mass of 100 GeV/c^2, the 820 mm fiducial volume showed an improvement of the spin-independent WIMP-nucleon cross-section by more than 30% compared to a fiducial volume of 720 mm, an updated limit actively being considered by the DEAP-3600 collaboration. We set an upper limit on the WIMP-nucleon spin-independent cross-section of 3.8 × 10^{−45} cm^2 (1.4 × 10^{−44} cm^2) for a WIMP mass of 100 GeV/c^2 (1 TeV/c^2) at 90% confidence level.
Sonnenfleckenzeichnung Nr. 214.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 14.10.2015, 08:00, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Umklapp Superradiance from a Collisionless Quantum Degenerate Fermi Gas
Creators: name: Piazza, Francesco
name: Strack, Philipp
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum dynamics of the electromagnetic light mode of an optical cavity filled with a coherently driven Fermi gas of ultracold atoms strongly depends on geometry of the Fermi surface. Superradiant light generation and self-organization of the atoms can be achieved at low pumping threshold due to resonant atom-photon Umklapp processes, where the fermions are scattered from one side of the Fermi surface to the other by exchanging photon momenta. The cavity spectrum exhibits sidebands, that, despite strong atom-light coupling and cavity decay, retain narrow linewidth, due to absorptionless transparency windows outside the atomic particle-hole continuum and the suppression of inhomogeneous broadening and thermal fluctuations in the collisionless Fermi gas.
description: Revised version, as accepted to Physical Review Letters
Rates of convergence in normal approximation under moment conditions via new bounds on solutions of the Stein equation
Creators: name: Gaunt, Robert E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05

description: New bounds for the $k$-th order derivatives of the solutions of the normal and multivariate normal Stein equations are obtained. Our general order bounds involve fewer derivatives of the test function than those in the existing literature. We apply these bounds and local approach couplings to obtain an order $n^{-(p-1)/2}$ bound, for smooth test functions, for the distance between the distribution of a standardised sum of independent and identically distributed random variables and the standard normal distribution when the first $p$ moments of these distributions agree. We also obtain a bound on the convergence rate of a sequence of distributions to the normal distribution when the moment sequence converges to normal moments.
description: 16 pages. Final version. To appear in Journal of Theoretical Probability
Sonnenfleckenzeichnung Nr. 167.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 05.08.2015, 08:45, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Where is the Beef? Aurochs Exploitation in Neolithic Northeast China
Creators: Zhang, Zhe
Publisher: name: University of Alberta Library
Year: 2023

Houtaomuga site is located at the embankment of Lake Xinhuangpao in Da’an County of northeast China. Excavations from 2011 to 2015 revealed an occupation ranging from the early Neolithic period to late Liao Dynasty. This dissertation will focus on an unusual feature from the late Neolithic period at the site, the 5500-year-old G2 trench, with its many aurochs, as well as related house structures, in order to make a detailed analysis of faunal remains, to reconstruct the construction and deposition process for the G2 trench, and to better understand this Neolithic economy. The results will also allow investigation of social constructs and ideologies at Houtaomuga.

Aurochs are the dominant species in the G2 trench, and their large numbers suggest that they were a significant terrestrial meat resource. Genetic analyses of ancient DNA from the G2 aurochs indicate that they were wild animals, but they had reduced body sizes. There was also a selective slaughtering pattern. These factors suggest that the G2 aurochs came from a population that may have been somewhere along the range between fully wild and fully domesticated animals.

I present data on the species present in G2 trench and house structures at Houtaomuga, the distribution of animal species and elements, butchering and cooking practices, scavenger damage to the bones, and postdepositional weathering patterns. I also engaged in a spatial analysis to clarify the function of the G2 trench. On the basis of this evidence, along with the clustering in radiocarbon dates, I argue that the faunal remains in the G2 trench resulted from one or a few episodes of mass procurement, followed by one or a few depositional events that occurred in a short time. I also suggest that the Houtaomuga inhabitants engaged in large-scale feasting, and that the G2 trench was built for symbolic and social reasons rather than for purely functional purposes. 
Sonnenfleckenzeichnung Nr. 178.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 20.08.2015, 09:00, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Optimal finite-range atomic basis sets for liquid water and ice
Creators: name: Corsetti, Fabiano
name: Fernández-Serra, M. -V.
name: Soler, José M.
name: Artacho, Emilio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Finite-range numerical atomic orbitals are the basis functions of choice for several first principles methods, due to their flexibility and scalability. Generating and testing such basis sets, however, remains a significant challenge for the end user. We discuss these issues and present a new scheme for generating improved polarization orbitals of finite range. We then develop a series of high-accuracy basis sets for the water molecule, and report on their performance in describing the monomer and dimer, two phases of ice, and liquid water at ambient and high density. The tests are performed by comparison with plane-wave calculations, and show the atomic orbital basis sets to exhibit an excellent level of transferability and consistency. The highest-order bases (quadruple-zeta) are shown to give accuracies comparable to a plane-wave kinetic energy cutoff of at least ~1000 eV for quantities such as energy differences and ionic forces, as well as achieving significantly greater accuracies for total energies and absolute pressures.
description: 17 pages, 14 figures
On a Hölder constant in the theory of quasiconformal mappings
Creators: name: Prause, István
Publisher: name: arXiv
Year: 2013
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: A K-quasiconformal selfmap of the unit disk with identity boundary values satisfies the Hölder estimate $|f(z)-f(w)| \leq 4^{1-1/K} |z-w|^{1/K}$. The constant $4^{1-\frac{1}{K}}$ is sharp.
description: 3 pages, typos corrected, to appear in F.W. Gehring memorial volume in CMFT
Sonnenfleckenzeichnung Nr. 204.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 30.09.2015, 07:15, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Optical lattice implementation scheme of a bosonic topological model with fermionic atoms
Creators: name: Nielsen, Anne E. B.
name: Sierra, Germán
name: Cirac, J. Ignacio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a scheme to implement a Fermi-Hubbard-like model in ultracold atoms in optical lattices and analyze the topological features of its ground state. In particular, we show that the ground state for appropriate parameters has a large overlap with a lattice version of the bosonic Laughlin state at filling factor one half. The scheme utilizes laser assisted and normal tunnelling in a checkerboard optical lattice. The requirements on temperature, interactions, and hopping strengths are similar to those needed to observe the Néel antiferromagnetic ordering in the standard Fermi-Hubbard model in the Mott insulating regime.
description: 18 pages, 10 figures. This article provides the full analysis of a scheme proposed in Nat. Commun. 4, 2864 (2013). v2: accepted version
Sonnenfleckenzeichnung Nr. 165.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 03.08.2015, 08:00, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Room temperature compressibility and diffusivity of liquid water from first principles
Creators: name: Corsetti, Fabiano
name: Artacho, Emilio
name: Soler, José M.
name: Alexandre, S. S.
name: Fernández-Serra, M. -V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The isothermal compressibility of water is essential to understand its anomalous properties. We compute it by ab initio molecular dynamics simulations of 200 molecules at five densities, using two different van der Waals density functionals. While both functionals predict compressibilities within ~30% of experiment, only one of them accurately reproduces, within the uncertainty of the simulation, the density dependence of the self-diffusion coefficient in the anomalous region. The discrepancies between the two functionals are explained in terms of the low- and high-density structures of the liquid.
description: 12 pages, 16 figures
Sonnenfleckenzeichnung Nr. 168.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.08.2015, 08:45, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
State Estimation and Control of mAb Production Processes
Creators: Obiri, Sandra Ama
Publisher: name: University of Alberta Library
Year: 2023

Monoclonal antibodies (mAbs) have become indispensable assets in modern medicine, necessitating advancements in large-scale production to meet the growing market demand. This thesis focuses on two critical aspects of mAb production: state estimation in the upstream process and the control and optimization of the downstream process.

Accurate state estimation is vital for optimizing the mAb production process and reducing costs. Therefore, this work presents guidelines for sensor selection to enhance state estimation accuracy, and illustrates an effective variable selection technique for simultaneous state and parameter estimation in the upstream process. Subsequently, a Moving Horizon Estimation (MHE) framework is developed  and applied to three case studies to demonstrate the efficiency of estimating some parameters in addition to the states, with the Root Mean Squared Error (RMSE) serving as the evaluation criterion.

The switching of the downstream capture columns are pivotal for ensuring the continuity of the integrated continuous mAb production process. However, due to the discrete nature of the switching operation, advanced process control algorithms such as economic model predictive control (EMPC) are computationally difficult to implement.

To address this issue, computationally-efficient approaches are explored to improve EMPC implementation. The first approach uses a sigmoid function to relax the discrete decision variables into continuous ones, which makes the optimization problem easier to solve. The second approach involves training a ReLU neural network to replace the original nonlinear model, leading to the conversion of the integer nonlinear program (INLP) into an integer linear program (ILP). This modification facilitates a quicker solution to the optimization problem.

Additionally, we explore a reinforcement learning (RL) method, which seeks to identify the most effective policy for addressing the optimization problem.

Comparatively, all three techniques are evaluated against the conventional switching approach, which relies on a fixed switching product breakthrough rule. The integration of improved state estimation in the upstream process and optimized control strategies in the downstream process presents a comprehensive framework for enhancing mAb production efficiency.
Development of AI-based ergonomics risk assessment tools for harmonization of industrial work systems
Creators: Govindan, Aswin Ramaswamy
Publisher: name: University of Alberta Library
Year: 2023

Manufacturing industry workers face significant ergonomic risks due to poorly designed work

systems. Consequently, it is crucial to periodically assess work systems to identify areas for

improvement. However, the assessment process is often disregarded due to the absence of userfriendly ergonomics risk assessment tools. The primary objective of this study is to address this

issue by leveraging artificial intelligence to develop convenient ergonomics risk assessment tools

for occupational injury management. The study identified four significant challenges that hamper

the effectiveness of ergonomics risk assessment: (1) a lack of versatile physical-ergonomic tools;

(2) the fragmented nature of existing ergonomic tools that fails to provide an integrated assessment

of work systems; (3) the challenge of developing an interpretable data analytics framework for risk

diagnosis; and (4) the inability to develop human-centered ML-powered ergonomics risk

assessment tools. To address these challenges, the study pursued four objectives. First, a versatile

physical-ergonomics risk assessment tool is developed using the Pattern Search optimization

algorithm to simplify tool selection for improving work systems. Second, a fuzzy logic-based

Decision Support System is developed to provide an integrated assessment of the ergonomic

performance of work systems by blending physical, environmental, and sensory risk factors. Third,

an effective and interpretable machine learning-based data analytics framework is developed for

diagnosing safety and ergonomics risk factors in work systems. Finally, a literature review is

conducted to uncover the many design challenges that hinder the development of human-centered

ML-powered ergonomics risk assessment tools. Overall, this study aims to demonstrate the

effectiveness of AI as a valuable technology for developing convenient ergonomics risk

assessment tools that aid health and safety specialists in mitigating ergonomic risks by facilitating

the harmonization of industrial work systems
Two functions on Sp(g,R)
Creators: name: Gilmer, Patrick M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 53D12, 19C09, 57M99, 11E39

description: We consider two functions on Sp(g,R) with values in the cyclic group of order four {1,-1,i,-i}. One was defined by Lion and Vergne. The other is -i raised to the power given by an integer valued function defined by Masbaum and the author (initially on the mapping class group of a surface). We identify these functions when restricted to Sp(g,Z). We conjecture the identity of these functions on Sp(g,R).
description: 8 pages
Learning Individual Readmission-Free Survival Distributions using Longitudinal Medical Events
Creators: Davis, Sarah (Sacha) Maren
Publisher: name: University of Alberta Library
Year: 2023

The rate of 30-day hospital readmission is a common measurement of hospital quality, which can affect the funding a hospital receives. Over a quarter of readmissions are estimated to be preventable with adequate interventions, but these interventions are themselves costly. For this reason, many projects have attempted to determine which individuals are at a high risk of readmission, and thus whose prognosis may improve with further testing and treatment. There are two common approaches to this prediction problem. (1) Formulate risk indices, such as the LACE score. These are common in a hospital setting; however, the simplicity often leads to poor predictive performance. (2) Use machine learning to transform a set of hand-selected features into the probability of readmission at a single future time-point. Unfortunately, feature engineering is time-consuming, and a physician may care about predictions at time points other than 30 days. Both approaches rely heavily on domain knowledge. In this thesis, I use Neural Multi-Task Logistic Regression (N-MTLR) to model all-cause readmission-free survival as a function of time. N-MTLR, despite producing probability predictions for all future time-points, out-performs XGBoost and Deep Learning approaches trained specifically to predict readmissions at 30 days (AUROC 0.821±0.004 (Std.Dev) versus 0.814±0.003 and 0.810±0.005). Further, I show that N-MTLR, augmented with a sequence model, can learn a patient’s representation directly from their history of medical codes, predicting 30-day all-cause readmission with an AUROC of 0.846±0.003 using only sequences of historical medical codes as input. This approach significantly outperforms the LACE baseline of 0.659±0.001. These results demonstrate the merit of medical code sequences to represent a patient’s entire past, and N-MLTR to model a patient’s entire future.
Double seesaw mechanism and lepton mixing
Creators: name: Grimus, W.
name: Lavoura, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a general framework for models in which the lepton mixing matrix is the product of the maximal mixing matrix U_ω times a matrix constrained by a well-defined Z_2 symmetry. Our framework relies on neither supersymmetry nor non-renormalizable Lagrangians nor higher dimensions; it relies instead on the double seesaw mechanism and on the soft breaking of symmetries. The framework may be used to construct models for virtually all the lepton mixing matrices of the type mentioned above which have been proposed in the literature.
description: 17 pages, 2 figures, extended appendix, version for publication in JHEP
ปัญหาอุปสรรคและแนวทางการแก้ไขพระราชบัญญัติอาวุธปืนของไทย
Creators: name: ภาคิน  โชติเวศย์ศิลป์
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา
Year: 2023
Subjects: ปัญหาอาวุธปืน
อุปสรรคอาวุธปืน
พระราชบัญญัติอาวุธปืนของไทย

description: วารสารวิชาการมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา, 11, 1, 1-20
Thickness-dependent ferromagnetic metal to paramagnetic insulator transition in La$_{0.6}$Sr$_{0.4}$MnO$_3$ thin films studied by x-ray magnetic circular dichroism
Creators: name: Shibata, Goro
name: Yoshimatsu, Kohei
name: Sakai, Enju
name: Singh, Vijay Raj
name: Verma, Virendra Kumar
name: Ishigami, Keisuke
name: Harano, Takayuki
name: Kadono, Toshiharu
name: Takeda, Yukiharu
name: Okane, Tetsuo
name: Saitoh, Yuji
name: Yamagami, Hiroshi
name: Sawa, Akihito
name: Kumigashira, Hiroshi
name: Oshima, Masaharu
name: Koide, Tsuneharu
name: Fujimori, Atsushi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Metallic transition-metal oxides undergo a metal-to-insulator transition (MIT) as the film thickness decreases across a ritical thickness of several monolayers (MLs), but its driving mechanism remains controversial. We have studied the thickness-dependent MIT of the ferromagnetic metal La$_{0.6}$Sr$_{0.4}$MnO$_3$ by x-ray absorption spectroscopy and x-ray magnetic circular dichroism. As the film thickness was decreased across the critical thickness of the MIT (6-8 ML), a gradual decrease of the ferromagnetic signals and a concomitant increase of paramagnetic signals were observed, while the Mn valence abruptly decreased towards Mn$^{3+}$. These observations suggest that the ferromagnetic phase gradually and most likely inhomogeneously turns into the paramagnetic phase and both phases abruptly become insulating at the critical thickness.
description: 12 pages, 3 figures
แนวทางการจัดการมรดกวัฒนธรรมของเมืองเวียงสระ จังหวัดสุราษฎร์ธานี
Creators: name: เตชวัน ปัญญาวุฒิธรรม
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา
Year: 2023
Subjects: มรดกวัฒนธรรม
คุณค่า
การจัดการ

description: วารสารวิชาการมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา, 11, 1, 21-50
อัตลักษณ์เพลงหน้าพาทย์: ประพันธ์โดยครูสำราญ เกิดผล
Creators: name: ปานหทัย วัชรีวงศ์ ณ อยุธยา
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา
Year: 2023
Subjects: การวิเคราะห์เพลง
อัตลักษณ์
เพลงหน้าพาทย์
ครูสำราญ เกิดผล

description: วารสารวิชาการมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา, 11, 1, 51-74
Quick, Look! A New Method for Artifact Detection
Creators: Satish Rao, Suhasini
Publisher: name: University of Alberta Library
Year: 2023

In the era of all-sky surveys, wide-area radio surveys like the Very Large Array Sky Survey (VLASS) place strong emphasis on the identification and classification of candidate transient events. To aid the transient searches, automatically generated VLASS Quick-Look (QL) images are designed and produced to deal with high data volumes and enable rapid followup observations. But, the incomplete and snapshot sampling of the sky in the uv-plane during VLASS observations combined with imaging choices made when generating QL images often lead to residual linear artifacts, particularly around brighter sources. While well-established techniques (like clean) maximizes the information from this partial sampling, such techniques can still be imperfect. Therefore, the need for automatic image-quality classification and assurance is more important than ever to ensure rapid data quality assessment and for enabling the best science. In this thesis, I present a new technique to identify these linear streaks around sources detected in the VLASS Epoch 1 QL images by extending the results of a line detection technique called the Hough Transform. After robustly quantifying the identified streaks, their effects on the sources/components that they are overlapping are removed. The resulting artifacts-subtracted components’ bright- nesses are then used to distinguish real astrophysical sources from imaging artifacts. Finally, I discuss the use of this streak detection method as an additional quality assessment step during interferometric image reconstruction.
Sonnenfleckenzeichnung Nr. 170.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 08.08.2015, 08:45, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 100.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 23.05.2015, 09:15, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
ปัจจัยที่มีผลกระทบต่อการเรียนแบบออนไลน์ในช่วงสถานการณ์โควิด-19 ในรายวิชาทักษะทางศิลปะการแสดงของนักศึกษาสาขาวิชาศิลปะการแสดง คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา
Creators: name: ธิดารัตน์ ภูมิวัฒนะ
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา
Year: 2023
Subjects: การเรียนการสอนออนไลน์
ศิลปะการแสดง
นักศึกษาปริญญาตรี

description: วารสารวิชาการมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา, 11, 1, 75-88
Sonnenfleckenzeichnung Nr. 60.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 31.03.2015, 08:30, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
เครือข่ายนโยบายสาธารณะ: ความหมาย การวิเคราะห์เครือข่ายและกรณีศึกษา
Creators: name: นิภาพรรณ  เจนสันติกุล
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา
Year: 2023
Subjects: เครือข่ายนโยบายสาธารณะ
องค์ประกอบ
กรณีศึกษา

description: วารสารวิชาการมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา, 11, 1, 89-110
Exploring the Causal Structures of Almost Commutative Geometries
Creators: name: Franco, Nicolas
name: Eckstein, Michał
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Operator Algebras (math.OA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 58B34, 53C50, 54F05

description: We investigate the causal relations in the space of states of almost commutative Lorentzian geometries. We fully describe the causal structure of a simple model based on the algebra $\mathcal{S}(\mathbb{R}^{1,1}) \otimes M_2(\mathbb{C})$, which has a non-trivial space of internal degrees of freedom. It turns out that the causality condition imposes restrictions on the motion in the internal space. Moreover, we show that the requirement of causality favours a unitary evolution in the internal space.