cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cross-link Interference Modeling in 6G Millimeter Wave and Terahertz LEO Satellite Communications
Creators: name: Aliaga, Sergi
name: Petrov, Vitaly
name: Jornet, Josep M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: One of the important questions when discussing next-generation near-Earth mmWave and terahertz (THz) band satellite communications as an integral part of the 5G-Advanced and 6G landscape is the potential interference-related issues when deploying such systems. While the space-to-ground and ground-to-space interference has been explored in multiple works already, the interference at mmWave and THz cross-links, the links between the satellites themselves, have not been extensively studied yet. However, severe cross-link interference may both challenge the reliability of the data exchange within the constellation, as well as compromise the efficient co-existence of multiple satellite constellations (i.e., by different providers) covering the same or neighboring areas. In this paper, both relevant mathematical models and extensive simulation studies are presented for cross-link mmWave and THz satellite communications. Our results indicate that the cross-link interference in the considered setups is a non-negligible factor that must be further explored and accounted for in the design and deployment of next-general mmWave and THz satellite communication systems.
description: 7 pages, 7 figures, accepted to IEEE International Conference on Communications, 2023. The copyright may be transferred without further notice after which this version may not be longer available
How do the Covid-19 Prevention Measures Interact with Sustainable Development Goals?
Creators: name: Beigi, Shima
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: General Economics (econ.GN)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: Washing hands, social distancing and staying at home are the preventive measures set in place to contain the spread of the COVID-19, a disease caused by SARS-CoV-2. These measures, although straightforward to follow, highlight the tip of an imbalanced socio-economic and socio-technological iceberg. Here, a System Dynamic (SD) model of COVID-19 preventive measures and their correlation with the 17 Sustainable Development Goals (SDGs) is presented. The result demonstrates a better informed view of the COVID-19 vulnerability landscape. This novel qualitative approach refreshes debates on the future of SDGS amid the crisis and provides a powerful mental representation for decision makers to find leverage points that aid in preventing long-term disruptive impacts of this health crisis on people, planet and economy. There is a need for further tailor-made and real-time qualitative and quantitative scientific research to calibrate the criticality of meeting the SDGS targets in different countries according to ongoing lessons learned from this health crisis.
description: 11 pages, 4 figures
Θεωρητική και υπολογιστική μελέτη της βαροκλινικής αστάθειας:
Creators: name: Καλογεράς, Πέτρος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Βαροκλινική αστάθεια
Το πρόβλημα του Eady
Quasi geostrophy
Baroclinic instability
The Eady problem

description: Στην παρούσα εργασία μελετάται η βαροκλινική αστάθεια στη γήινη ατμόσφαιρα, θεωρητικά και υπολογιστικά. Η θεωρητική μελέτη περιλαμβάνει τη διαδικασία εύρε-σης αναλυτικών λύσεων ενός απλοποιημένου συστήματος περιγραφής του ατμοσφαι-ρικού ρευστού (σύστημα Boussinesq), καταλήγοντας σε μη φραγμένη συμπεριφορά σε διαταραχές ατμοσφαιρικών μεταβλητών (ταχύτητα, πίεση, πυκνότητα). Εν συνε-χεία, έπεται προσομοίωση όπου παρατηρείται εξελικτική συμπεριφορά η οποία προ-σιδιάζει στην εμφάνιση μιας τέτοιας ατμοσφαιρικής αστάθειας (εμφάνιση βαρομετρι-κού χαμηλού μέσω διέλευσης ψυχρού μετώπου αέριας μάζας).
description: In the current project, the topic of baroclinic instability in the Earth’s atmosphere is considered theoretically as well as numerically. The theoretical study comprises the acquisition procedure of analytical solutions to a simplified system for describing the atmospheric fluid (Boussinesq system), resulting in an unbounded behaviour of the perturbations of the atmospheric variables (velocity, pressure, density). In the simula-tion which ensues, an evolutional behaviour appertaining to one such atmospheric in-stability configuration, is observed (emergence of a low pressure system via the onset of a cold front).
Enabling High-Power, Broadband THz Generation with 800-nm Pump Wavelength
Creators: name: Zaccardi, Zachary B.
name: Tangen, Isaac C.
name: Valdivia-Berroeta, Gabriel A.
name: Bahr, Charles B.
name: Kenney, Karissa C.
name: Rader, Claire
name: Lutz, Matthew J.
name: Hunter, Brittan P.
name: Michaelis, David J.
name: Johnson, Jeremy A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The organic terahertz (THz) generation crystal BNA has recently gained traction as a valuable source to produce broadband THz pulses. Even when pumped with 800-nm light, thin BNA crystals can produce relatively high electric fields with frequency components out to 5 THz. However, the THz output when pumped with 800-nm light is limited by the damage threshold of the organic crystal. Here we report that the damage threshold of BNA can be significantly improved by physically bonding BNA to a high-thermal conductivity sapphire window. When pumped with 800-nm light from an amplified Ti:sapphire laser system, our bonded BNA (BNA-sapphire) generates 2.5 times higher electric field strengths compared to bare BNA crystals. We characterize the average damage threshold for bare BNA and BNA-sapphire, measure peak-to-peak electric field strengths and THz waveforms, and determine the nonlinear transmission in BNA. Pumping BNA-sapphire with 800-nm light results in peak-to-peak electric fields exceeding 1 MV/cm, with strong broadband frequency components from 0.5-5 THz. Our BNA-sapphire THz source is a promising alternative to tilted pulse front LiNbO3 THz sources, which will enable many research groups without optical parametric amplifiers to perform high-field, broadband THz spectroscopy.
description: 9 pages, 5 figures
Fuzzing Automatic Differentiation in Deep-Learning Libraries
Creators: name: Yang, Chenyuan
name: Deng, Yinlin
name: Yao, Jiayi
name: Tu, Yuxing
name: Li, Hanchi
name: Zhang, Lingming
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Deep learning (DL) has attracted wide attention and has been widely deployed in recent years. As a result, more and more research efforts have been dedicated to testing DL libraries and frameworks. However, existing work largely overlooked one crucial component of any DL system, automatic differentiation (AD), which is the basis for the recent development of DL. To this end, we propose $\nabla$Fuzz, the first general and practical approach specifically targeting the critical AD component in DL libraries. Our key insight is that each DL library API can be abstracted into a function processing tensors/vectors, which can be differentially tested under various execution scenarios (for computing outputs/gradients with different implementations). We have implemented $\nabla$Fuzz as a fully automated API-level fuzzer targeting AD in DL libraries, which utilizes differential testing on different execution scenarios to test both first-order and high-order gradients, and also includes automated filtering strategies to remove false positives caused by numerical instability. We have performed an extensive study on four of the most popular and actively-maintained DL libraries, PyTorch, TensorFlow, JAX, and OneFlow. The result shows that $\nabla$Fuzz substantially outperforms state-of-the-art fuzzers in terms of both code coverage and bug detection. To date, $\nabla$Fuzz has detected 173 bugs for the studied DL libraries, with 144 already confirmed by developers (117 of which are previously unknown bugs and 107 are related to AD). Remarkably, $\nabla$Fuzz contributed 58.3% (7/12) of all high-priority AD bugs for PyTorch and JAX during a two-month period. None of the confirmed AD bugs were detected by existing fuzzers.
description: Accepted at ICSE'23
Exact results for spin dynamics and fractionization in the Kitaev Model
Creators: name: Baskaran, G.
name: Mandal, Saptarshi
name: Shankar, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present certain exact analytical results for dynamical spin correlation functions in the Kitaev Model. It is the first result of its kind in non-trivial quantum spin models. The result is also novel: in spite of presence of gapless propagating Majorana fermion excitations, dynamical two spin correlation functions are identically zero beyond nearest neighbor separation, showing existence of a gapless but short range spin liquid. An unusual, \emph{all energy scale fractionization}of a spin -flip quanta, into two infinitely massive $π$-fluxes and a dynamical Majorana fermion, is shown to occur. As the Kitaev Model exemplifies topological quantum computation, our result presents new insights into qubit dynamics and generation of topological excitations.
description: 4 pages, 2 figures. Typose corrected, figure made better, clarifying statements and references added
Όψεις σύγχρονης τηλεοπτικής διασκέδασης:
Creators: name: Ζαχόπουλος, Κωνσταντίνος Ιωάννης
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Τηλεόραση
Πορνογραφία
Λέσχες δανεισμού
Tv television
Pornography
Dvd video clubs

description: Η εργασία επικεντρώνεται στη μελέτη του άσεμνου οπτικού υλικού, όπως αυτό προβάλλεται στα σύγχρονα οπτικοακουστικά μέσα. Επίσης, τα προηγούμενα μελετούνται με γνώμονα τη σχέση τους με τους διακινητές, τους αποδέκτες και τους καταναλωτές του υλικού, ενώ ένα σημαντικό τμήμα της εργασίας αφορά τους τρόπους πρόσβασης σε αυτό. Αναλύονται οι θέσεις και οι απόψεις των πληροφορητών απέναντι στις άσεμνες απεικονίσεις της ανθρώπινης σεξουαλικότητας και γίνεται μια προσπάθεια εξαγωγής συμπερασμάτων σχετικά με αυτές.
description: The essay focuses on the study of the obscene visual material as it is displayed by the modern audiovisual Medias. Also, the previous are studied with criterion the connection to their dealers, their receivers and the consumers of the material, while a substantial part of the essay deals with the access to it. Informants’ aspects and views over the obscene representation of the human sexuality are being analyzed and an attempt to deduct conclusions in connection to the previous phenomena is being made.
Анализ алгоритмов обхода препятствий и поиска пути в априорно неопределенной среде для мобильного устройства
Creators: name: Афанасов Алексей Леонидович
Publisher: name: Вопросы науки и образования
Year: 2019
Subjects: ДИАГРАММА ВОРОНОГО
МОБИЛЬНОЕ УСТРОЙСТВО
GNT

description: Данная статья посвящена анализу алгоритмов обхода препятствий и поиска пути для мобильного устройства в априорно неопределенной среде. Рассмотрены алгоритмы Жука и навигации по зазорам (GNT), а также методы обхода препятствий с помощью методов клеточной декомпозиции и диаграммы Вороного.
Distributing hash families with few rows
Creators: name: Colbourn, Charles J.
name: Dougherty, Ryan E.
name: Horsley, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B15

description: Column replacement techniques for creating covering arrays rely on the construction of perfect and distributing hash families with few rows, having as many columns as possible for a specified number of symbols. To construct distributing hash families in which the number of rows is less than the strength, we examine a method due to Blackburn and extend it in three ways. First, the method is generalized from homogeneous hash families (in which every row has the same number of symbols) to heterogeneous ones. Second, the extension treats distributing hash families, in which only separation into a prescribed number of parts is required, rather than perfect hash families, in which columns must be completely separated. Third, the requirements on one of the main ingredients are relaxed to permit the use of a large class of distributing hash families, which we call fractal. Constructions for fractal perfect and distributing hash families are given, and applications to the construction of perfect hash families of large strength are developed.
description: 21 pages, 0 figures
บางลักษณะเชิงสถิติของการวัดความเห็นพ้องต้องกันระหว่างสองผู้ประเมิน
Creators: name: พรพิศ ยิ้มประยูร
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2555
Subjects: การวัดความเห็นพ้องต้องกัน,มาตรานามบัญญัติ,มาตราวัดต่อเนื่อง,ตัวสถิติโคเฮนแคปปา

description: 2, 5, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Artifacts for ISSTA 2024 submission #510
Creators: name: Anonymous
Publisher: name: Zenodo
Year: 2024

description: MultiConf

This replication package contains the necessary files to redo the experiment and verify the experimental results.

All our experiments are based on GCC svn repository.

The replication package contains the following files:

"gcc-run.py": This script executes the experiment.

"verify-results.py": This script verifies the experimental results.

"gccbugs_summary.txt": This file contains summary information of all the bugs in the benchmark.

The replication package also includes the following directories:

"gcc/compilers": The directory is where the GCC compilers will be installed using the provided script.

"gcc/cov": This directory contains the collected code coverage used to verify the experimental results.

"gcc/gccbugs": This directory contains the dataset used in the experiment.

Instructions

In "gccbugs_summary.txt", you can add GCC bugs from bugzilla according to the following format:

bugId,GCC trunk revision number,the optimization level that would not trigger the bug, the optimization level that would trigger the bug,bug locations

An example of this format is shown in "gccbugs_summary.txt":

57488,r199531,-O2,-O3,gcc/tree-ssa-pre.c

Then go to gcc/gccbugs/bugId/* and create fail.c (the given program which can trigger the bug from bugzilla).

To redo the experiment, follow the steps below:

Ensure you have Python 3 and other necessary dependencies to install GCC compilers.

Move the entire gcc directory to the root directory of your system.

Run the following command in the terminal: python3 gcc-run.py

To verify the experimental results in the paper, follow the steps below:

Ensure you have Python 3 installed on your system.

Run the following command in the terminal: python3 verify-results.py
Факторы обеспечения длительной устойчивости и безопасности подземных горных выработок шахт и рудников в условиях проявления тектонических процессов
Creators: name: Меликулов Абдусаттар Джаббарович
name: Акбаров Тахирджон Гуламович
name: Имаилов Анварбек Суннатуллаевич
name: Бакиров Гайрат Холикбердиевич
name: Мухитдинов Шухратхужа Рамзидинович
Publisher: name: Вопросы науки и образования
Year: 2019
Subjects: ГОРНЫЕ ВЫРАБОТКИ
НАПРЯЖЕННО-ДЕФОРМИРОВАННОЕ СОСТОЯНИЕ
РЕАКЦИЯ КРЕПИ
АНИЗОТРОПИЯ
МОДУЛЬ ДЕФОРМАЦИИ
КРЕПЕЖНЫЕ РАМЫ

description: В статье рассматриваются условия формирования и изменения напряженно-деформированного состояния массива горных пород вокруг подземных горных выработок, особенности длительного поддержания таких выработок в условиях проявления тектонических процессов, характерных для региона Центральной Азии.
Generalized Periodicity in Group Cohomology
Creators: name: Elber, Nir
Publisher: name: arXiv
Year: 2023
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20J06

description: Given a finite group $G$, we introduce "encoding pairs," which are a pair of $G$-modules $M$ and $M'$ equipped with a shifted natural isomorphism between the cohomological functors $H^\bullet(G,\mathrm{Hom}_\mathbb Z(M,-))$ and $H^\bullet(G,\mathrm{Hom}_\mathbb Z(M',-))$. Studying these encoding pairs generalizes the theory of periodic cohomology for finite groups, allowing us to generalize the cohomological input of a theorem due to Swan that roughly says that a finite group with periodic cohomology acts feely on some sphere.
description: 18 pages. Comments welcome!
Medical Statistics: A Textbook for the Health Sciences
Creators: name: นริศา คำแก่น
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2555
Subjects: Statistic,Healthcare

description: 2, 5, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
The large-scale axisymmetric magnetic topology of avery-low-mass fully-convective star
Creators: name: Donati, JF
name: Forveille, T
name: Cameron, AC
name: Barnes, JR
name: Delfosse, X
name: Jardine, MM
name: Valenti, JA
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Understanding how cool stars produce magnetic fields within their interiors is crucial for predicting the impact of such fields, such as the activity cycle of the Sun. In this respect, studying fully convective stars enables us to investigate the role of convective zones in magnetic field generation. We produced a magnetic map of a rapidly rotating, very-low-mass, fully convective dwarf through tomographic imaging from time series of spectropolarimetric data. Our results, which demonstrate that fully convective stars are able to trigger axisymmetric large-scale poloidal fields without differential rotation, challenge existing theoretical models of field generation in cool stars.
description: 17 pages, 4 figures, supplementary online material (including 2 figures)
Perfect precise colorings of plane semiregular tilings
Creators: name: Loquias, Manuel Joseph C.
name: Santos, Rovin B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B45 (Primary), 52C20 (Secondary)

description: A coloring of a planar semiregular tiling $\mathcal{T}$ is an assignment of a unique color to each tile of $\mathcal{T}$. If $G$ is the symmetry group of $\mathcal{T}$, we say that the coloring is perfect if every element of $G$ induces a permutation on the finite set of colors. If $\mathcal{T}$ is $k$-valent, then a coloring of $\mathcal{T}$ with $k$ colors is said to be precise if no two tiles of $\mathcal{T}$ sharing the same vertex have the same color. In this work, we obtain perfect precise colorings of some families of $k$-valent semiregular tilings in the plane, where $k\leq 6$.
description: 19 pages, 65 figures
การบำบัดน้ำเสียจากโรงงานอุตสาหกรรมผลิตข้อต่อท่อประปาเหล็ก ด้วยการตกตะกอนเคมีร่วมกับการดูดซับ
Creators: name: ปารินดา สุขสบาย
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2555
Subjects: การบำบัดน้ำเสีย,โรงงานอุตสาหกรรมข้อต่อท่อประปาเหล็ก,การตกตะกอนเคมี,การดูดซับ

description: 1, 5, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Tüp Torakostomi Sonrasında Rutin Görüntüleme Şart mı?
Creators: name: Erkman SANRI
Publisher: name: Zenodo
Year: 2017

description: Pnömotoraks ve hemotoraks tedavisinde toraks tüpünün standart kullanımına ilk olarak 1950’lerde başlanmış olsa da aslında toraks drenajı fikri Hipokrat (M.Ö. 460-370) zamanından beri olan bir fikirdir. Bu drenaj fikri (şu andaki ile aynı olmasa da) ışığında hipokratın ampiyem tedavisinde teneke kutu, şarap ve yağ kullandığını biliyoruz. Travmada bilinen ilk toraks tüpü ise 1200’lü yıllarda Gawan isimli bir şövalyenin tansiyon pnömotoraks tedavisinde kullanılmış. Plastik toraks tüpü ilk olarak 1961’de piyasaya çıkmış. Kapalı torakostomi ve su altı drenaj sisteminin yaygın kullanımı ise Vietnam savaşında başlamış ve mortaliteyi %2.9 düşürdüğü görülünce kullanımı iyice yaygınlaşmış. Şu anda kullanılan tüpler şeffaf vinil veya silastik yapıda.
A Laptop Ensemble Performance System using Recurrent Neural Networks
Creators: name: Proctor, Rohan
name: Martin, Charles Patrick
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: H.5.5; H.5.3

description: The popularity of applying machine learning techniques in musical domains has created an inherent availability of freely accessible pre-trained neural network (NN) models ready for use in creative applications. This work outlines the implementation of one such application in the form of an assistance tool designed for live improvisational performances by laptop ensembles. The primary intention was to leverage off-the-shelf pre-trained NN models as a basis for assisting individual performers either as musical novices looking to engage with more experienced performers or as a tool to expand musical possibilities through new forms of creative expression. The system expands upon a variety of ideas found in different research areas including new interfaces for musical expression, generative music and group performance to produce a networked performance solution served via a web-browser interface. The final implementation of the system offers performers a mixture of high and low-level controls to influence the shape of sequences of notes output by locally run NN models in real time, also allowing performers to define their level of engagement with the assisting generative models. Two test performances were played, with the system shown to feasibly support four performers over a four minute piece while producing musically cohesive and engaging music. Iterations on the design of the system exposed technical constraints on the use of a JavaScript environment for generative models in a live music context, largely derived from inescapable processing overheads.
Embedding into Banach spaces with finite dimensional decompositions
Creators: name: Odell, E.
name: Schlumprecht, Th.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B03; 46B20

description: This paper deals with the following types of problems: Assume a Banach space $X$ has some property (P). Can it be embedded into some Banach space $Z$ with a finite dimensional decomposition having property (P), or more generally, having a property related to (P)? Secondly, given a class of Banach spaces, does there exist a Banach space in this class, or in a closely related one, which is universal for this class?
description: 26 pages
Physics-Informed Long Short-Term Memory for Forecasting and Reconstruction of Chaos
Creators: name: Özalp, Elise
name: Margazoglou, Georgios
name: Magri, Luca
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We present the Physics-Informed Long Short-Term Memory (PI-LSTM) network to reconstruct and predict the evolution of unmeasured variables in a chaotic system. The training is constrained by a regularization term, which penalizes solutions that violate the system's governing equations. The network is showcased on the Lorenz-96 model, a prototypical chaotic dynamical system, for a varying number of variables to reconstruct. First, we show the PI-LSTM architecture and explain how to constrain the differential equations, which is a non-trivial task in LSTMs. Second, the PI-LSTM is numerically evaluated in the long-term autonomous evolution to study its ergodic properties. We show that it correctly predicts the statistics of the unmeasured variables, which cannot be achieved without the physical constraint. Third, we compute the Lyapunov exponents of the network to infer the key stability properties of the chaotic system. For reconstruction purposes, adding the physics-informed loss qualitatively enhances the dynamical behaviour of the network, compared to a data-driven only training. This is quantified by the agreement of the Lyapunov exponents. This work opens up new opportunities for state reconstruction and learning of the dynamics of nonlinear systems.
Μελέτη μαργαριταριών με οπτικές και θερμικές μεθόδους
Creators: name: Θεοδόσογλου, Ελένη Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Μαργαριτάρια
Χρώμα
Θερμική ανάλυση
FTIR
Pearls
Color
Thermal analysis

description: Στην παρούσα διατριβή ειδίκευσης μελετήθηκε η επίδραση της θερμότητας στη δομή και στο χρώμα πέντε λευκών καλλιεργημένων μαργαριταριών γλυκού νερού του είδους Hyriopsis cumingi. Μεταβολή στο χρώμα τους παρατηρήθηκε στα δείγματα που θερμάνθηκαν σε χαμηλή θερμοκρασία (από 140ο C έως 180ο C) και συγκεκριμένα τα δείγματα που θερμάνθηκαν σε υψηλότερες θερμοκρασίες εμφάνισαν εντονότερο κιτρινωπό χρώμα από αυτά που θερμάνθηκαν σε χαμηλότερες. Επίσης, όσο περισσότερος είναι ο χρόνος θέρμανσης των δειγμάτων, τόσο πιο έντονο κιτρινωπό χρώμα αποκτούν τα μαργαριτάρια. Στα φάσματα FTIR των δειγμάτων αυτών δεν παρατηρήθηκε καμία μεταβολή στη θέση των κορυφών τους. Θέρμανση σκόνης των δειγμάτων σε υψηλότερες τιμές θερμοκρασίας αποκάλυψε μεταβολές τόσο στη δομή των μαργαριταριών, όσο και στην οργανική τους ουσία. Συγκεκριμένα, από τους 250ο C παρατηρείται μερική μετατροπή του αραγωνίτη σε ασβεστίτη. Στη θερμοκρασία αυτή επηρεάζεται και η οργανική ουσία τους, πιθανότατα λόγω σπάσιμου ορισμένων από τους δεσμούς της. Στους 330ο C μεγαλύτερο ποσοστό αραγωνίτη μετατρέπεται σε ασβεστίτη και η οργανική ουσία τους επίσης μεταβάλλεται. Στους 460ο και 600ο C παρατηρείται πλήρης μετατροπή του αραγωνίτη σε ασβεστίτη, καθώς επίσης και μεταβολές στην οργανική τους ουσία.
description: In this study is investigated the influence of heat treatment in the structure and the color of five white freshwater cultured pearls of the Hyriopsis cumingi species. Changes in their color were observed after heat treatment in low temperatures (from 140o C to 180o C). The heated samples in higher temperatures show much more intense yellowish color than those which heated in lower temperatures. Furthermore, the color of the samples that heated for longer time is more intense yellowish than the color of the samples that heated for less time. In the FTIR spectra of these samples no change in their bands observed. Heat treatment in powdered pearls in higher temperatures revealed changes in their structure, as well as in their organic matter. Specifically, after the heat treatment of the samples at 250o C partial transformation of aragonite to calcite was observed. Also, the organic matter of the pearls is affected, probably due to a breakdown of some of their bonds. Heating of the samples at 330o C reveals changes in their structure, as higher percentage of aragonite transformed into calcite and the organic matter differentiates. After the heat treatment of the samples at 460ο and 600ο C all of the aragonite transformed into calcite and changes in the organic matter of the pearls appeared.
description: Σε συνεργασία με το Ινστιτούτο Τεχνολογίας Γκρενόμπλ (Γαλλία), το ΕΚΕΦΕ Δημόκριτος, και το CNRS (Centre National de la Researche Scientifique, Γαλλία)
การพัฒนาส่วนผสมผลิตภัณฑ์อิฐดินเผาจังหวัดพระนครศรีอยุธยา และอ่างทอง
Creators: name: สุทัศน์ จันบัวลา
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2555
Subjects: อิฐดินเผา,เครื่องปั้นดินเผา,เซรามิกส์

description: 1, 5, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Glycogen utilization in the athlete under conditions of accute, moderate hypoxia
Creators: name: Hazlett, David Lorne
Publisher: name: University of British Columbia
Year: 2009

description: It is common knowledge that diet and endurance training both have a major impact on body glycogen stores and carbohydrate metabolism. Usual nutritional recommendations for athletes participating in endurance activities are to consume at least 8 grams of carbohydrate per kilogram body weight. This level of carbohydrate intake has been found to optimally maintain muscle glycogen stores in actively training endurance athletes. This recommendation has been based on athletic activity undertaken under sea level conditions. A survey of the literature shows that this recommendation has never been investigated in athletes exercising under hypoxic conditions such as at altitude. Theoretical and experimental evidence would predict that under hypoxic conditions, one strategy which could maintain ATP production in the face of decreased oxygen availability is to increase flux through the glycolytic pathway. Increased glycolytic flux could ultimately affect carbohydrate use which could in turn lead to enhanced muscle glycogen use. If this did occur, it could have implications for dietary advice given to athletes exercising at altitude. It was our intent to see if these alterations occur with exercise under acute exposure to moderate altitudes such as those an athlete could conceivably face during competition. To investigate this possibility, muscle glycogen utilization was assessed during exercise at sea level (SL) and with acute exposure to simulated altitude (ALT) equivalent to 7500 feet above sea level. Six endurance trained cyclists exercised for 75 minutes at the same relative exercise intensity (65% of VO2 ma x) under each condition. In addition to glycogen use, plasma lactate serum glucose, and respiratory exchange ratios (RER) were also evaluated to assess whether any shift in substrate use occurred between conditions. There was a trend towards decreased muscle glycogen use under ALT conditions, however the difference was not found to be significant (P=0.09). Plasma lactate, serum glucose, and RER findings were also found to be not significantly different between conditions. This data suggests that exercise at the same relative intensity at ALT as SL does not result in enhanced carbohydrate use. From this it is inferred that under the conditions used, oxygen supply to exercising muscle is not diminished. These findings also suggest that in highly trained cyclists undertaking exercise under moderate altitude conditions, no increase in carbohydrate intake is necessary above that recommended for exercise of equivalent intensity at sea level.
การประเมินคุณภาพน้ำในพื้นที่ชุ่มน้ำภายในมหาวิทยาลัยเกษตรศาสตร์ วิทยาเขตกำแพงแสน โดยใช้กลุ่มแมลงน้ำ
Creators: name: พนมวรรณ อยู่พร้อม
name: ธนวรรณ พาณิชพัฒน์
name: แตงอ่อน พรหมมิ
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2555
Subjects: แมลงน้ำ,พื้นที่ชุ่มน้ำ,คุณภาพน้ำ

description: 1, 5, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Opportunities and Challenges in Code Search Tools
Creators: name: Liu, Chao
name: Xia, Xin
name: Lo, David
name: Gao, Cuiyun
name: Yang, Xiaohu
name: Grundy, John
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Code search is a core software engineering task. Effective code search tools can help developers substantially improve their software development efficiency and effectiveness. In recent years, many code search studies have leveraged different techniques, such as deep learning and information retrieval approaches, to retrieve expected code from a large-scale codebase. However, there is a lack of a comprehensive comparative summary of existing code search approaches. To understand the research trends in existing code search studies, we systematically reviewed 81 relevant studies. We investigated the publication trends of code search studies, analyzed key components, such as codebase, query, and modeling technique used to build code search tools, and classified existing tools into focusing on supporting seven different search tasks. Based on our findings, we identified a set of outstanding challenges in existing studies and a research roadmap for future code search research.
description: 35 pages, 7 figures
The Role of Early Giant Planet Instability in the Terrestrial Planet Formation
Creators: name: Nesvorny, David
name: Roig, Fernando V.
name: Deienno, Rogerio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The terrestrial planets are believed to have formed by violent collisions of tens of lunar- to Mars-size protoplanets at time t<200 Myr after the protoplanetary gas disk dispersal (t_0). The solar system giant planets rapidly formed during the protoplanetary disk stage and, after t_0, radially migrated by interacting with outer disk planetesimals. An early (t<100 Myr) dynamical instability is thought to have occurred with Jupiter having gravitational encounters with a planetary-size body, jumping inward by ~0.2-0.5 au, and landing on its current, mildly eccentric orbit. Here we investigate how the giant planet instability affected formation of the terrestrial planets. We study several instability cases that were previously shown to match many solar system constraints. We find that resonances with the giant planets help to remove solids available for accretion near ~1.5 au, thus stalling the growth of Mars. It does not matter, however, whether the giant planets are placed on their current orbits at t_0 or whether they realistically evolve in one of our instability models; the results are practically the same. The tight orbital spacing of Venus and Earth is difficult to reproduce in our simulations, including cases where bodies grow from a narrow annulus at 0.7-1 au, because protoplanets tend to radially spread during accretion. The best results are obtained in the narrow-annulus model when protoplanets emerging from the dispersing gas nebula are assumed to have (at least) the Mars mass. This suggests efficient accretion of the terrestrial protoplanets during the first ~10 Myr of the solar system.
description: AJ, in press
ความหลากหลายทางชีวภาพของแมลงน้ำในนาข้าว
Creators: name: แตงอ่อน พรหมมิ
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2555
Subjects: ความหลากหลายทางชีวภาพ,แมลงน้ำ,คุณภาพน้ำ,นาข้าว

description: 1, 5, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Excitable Greenberg-Hastings cellular automaton model on scale-free networks
Creators: name: Wu, An-Cai
name: Xu, Xin-Jian
name: Wang, Ying-Hai
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the excitable Greenberg-Hastings cellular automaton model on scale-free networks. We obtained analytical expressions for no external stimulus and the uncoupled case. It is found that the curves, the average activity $F$ versus the external stimulus rate $r$, can be fitted by a Hill function, but not exactly, and there exists a relation $F\propto r^α$ for the low-stimulus response, where Stevens-Hill exponent $α$ ranges from $α= 1$ in the subcritical regime to $α= 0.5$ at criticality. At the critical point, the range reaches the maximal. We also calculate the average activity $F^{k}(r)$ and the dynamic range $Δ^{k}(p)$ for nodes with given connectivity $k$. It is interesting that nodes with larger connectivity have larger optimal range, which could be applied in biological experiments to reveal the network topology.
description: submitted to Phys. Rev. E
Defocusing nonlocal nonlinear Schrödinger equation with step-like boundary conditions: long-time behavior for shifted initial data
Creators: name: Rybalko, Yan
name: Shepelsky, Dmitry
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The present paper deals with the long-time asymptotic analysis of the initial value problem for the integrable defocusing nonlocal nonlinear Schrödinger equation $ iq_{t}(x,t)+q_{xx}(x,t)-2 q^{2}(x,t)\bar{q}(-x,t)=0 $ with a step-like initial data: $q(x,0)\to 0$ as $x\to -\infty$ and $q(x,0)\to A$ as $x\to +\infty$. Since the equation is not translation invariant, the solution of this problem is sensitive to shifts of the initial data. We consider a family of problems, parametrized by $R>0$, with the initial data that can be viewed as perturbations of the "shifted step function" $q_{R,A}(x)$: $q_{R,A}(x)=0$ for $xR$, where $A>0$ and $R>0$ are arbitrary constants. We show that the asymptotics is qualitatively different in sectors of the $(x,t)$ plane, the number of which depends on the relationship between $A$ and $R$: for a fixed $A$, the bigger $R$, the larger number of sectors. Moreover, the sectors can be collected into 2 alternate groups: in the sectors of the first group, the solution decays to 0 while in the sectors of the second group, the solution approaches a constant (varying with the direction $x/t=const$).
การศึกษาประสิทธิภาพของสารสกัดผสมระหว่างจอกและมะขามป้อม 47 ที่มีผลยับยั้งเชื้อจุลินทรีย์ก่อโรคผิวหนัง
Creators: name: ทิฐิมา ภาคภูมิ
name: กัลยาภรณ์ จันตรี
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2555
Subjects: จอก,มะขามป้อม,ความเข้มข้นต่ำสุดที่มีต่อการยับยั้งการเจริญของเชื้อจุลินทรีย์

description: 1, 5, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Free-floating or wide-orbit? Keck adaptive-optics observations of free-floating planet candidates detected with gravitational microlensing
Creators: name: Mroz, P.
name: Ban, M.
name: Marty, P.
name: Poleski, R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent detections of extremely short-timescale microlensing events imply the existence of a large population of Earth- to Neptune-mass planets that appear to have no host stars. However, it is currently unknown whether these objects are truly free-floating planets or whether they are in wide orbits around a distant host star. Here, we present an analysis of high-resolution imaging observations of five free-floating planet candidates collected with the Keck telescope. If these candidates were actually wide-orbit planets, then the light of the host would appear at a separation of 40-60 mas from the microlensing source star. No such stars are detected. We carry out injection and recovery simulations to estimate the sensitivity to putative host stars at different separations. Depending on the object, the presented observations rule out 11%-36\% of potential hosts assuming that the probability of hosting a planet does not depend on the host mass. The results are sensitive to the latter assumption, and the probability of detecting the host star in the analyzed images may be a factor of 1.9 +/- 0.1 larger, if the exoplanet hosting probability scales as the first power of the host star mass, as suggested by recent studies of planetary microlensing events. We argue that deeper observations, for example with JWST, are needed to confidently confirm or refute the free-floating planet hypothesis.
description: accepted for publication in AJ
Galilean covariance of quantum-classical hybrid systems of the Sudarshan type
Creators: name: Manjarres, A. D. Bermúdez
name: Marín-Medina, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We revisit quantum-classical hybrid systems of the Sudarshan type under the light of Galilean covariance. We show that these kind of hybrids cannot be given as a unitary representation of the Galilei group and at the same time conserve the total linear momentum unless the interaction term only depends on the relative canonical velocities.
Integral and fractional Quantum Hall Ising ferromagnets
Creators: name: Vyborny, K.
name: Certik, O.
name: Pfannkuche, D.
name: Wodzinski, D.
name: Wojs, A.
name: Quinn, J. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We compare quantum Hall systems at filling factor 2 to those at filling factors 2/3 and 2/5, corresponding to the exact filling of two lowest electron or composite fermion (CF) Landau levels. The two fractional states are examples of CF liquids with spin dynamics. There is a close analogy between the ferromagnetic (spin polarization P=1) and paramagnetic (P=0) incompressible ground states that occur in all three systems in the limits of large and small Zeeman spin splitting. However, the excitation spectra are different. At filling factor 2, we find spin domains at half-polarization (P=1/2), while antiferromagnetic order seems most favorable in the CF systems. The transition between P=0 and 1, as seen when e.g. the magnetic field is tilted, is also studied by exact diagonalization in toroidal and spherical geometries. The essential role of an effective CF-CF interaction is discussed, and the experimentally observed incompresible half-polarized state is found in some models.
Oxazaborolidinones in Bisvinylogous Mukaiyama-Aldol reactions and studies towards the total synthesis of pentacaronic acid
Creators: name: Millbrodt, Lucas
Publisher: name: Hannover : Institutionelles Repositorium der Gottfried Wilhelm Leibniz Universität
Year: 2024
Subjects: subject: Mukaiyama-aldol reaction
subject: oxazaborolidinones
subject: total synthesis
subject: natural products
subject: pentacaronic acid
subject: polyketides
subject: Mukaiyama-Aldolreaktion
subject: Oxazaborolidinone
subject: Totalsynthese
subject: Naturstoffe
subject: Pentacaronsäure
subject: Polyketide
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: xxx
A global exploratory comparison of country self-citations 1996-2019
Creators: name: Baccini, Alberto
name: Petrovich, Eugenio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Digital Libraries (cs.DL)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Self-citations are a key topic in evaluative bibliometrics because they can artificially inflate citation-related performance indicators. Recently, self-citations defined at the largest scale, i.e., country self-citations, have started to attract the attention of researchers and policymakers. According to a recent research, in fact, the anomalous trends in the country self-citation rates of some countries, such as Italy, have been induced by the distorting effect of citation metrics-centered science policies. In the present study, we investigate the trends of country self-citations in 50 countries over the world in the period 1996-2019 using Scopus data. Results show that for most countries country self-citations have decreased over time. 12 countries (Colombia, Egypt, Indonesia, Iran, Italy, Malaysia, Pakistan, Romania, Russian Federation, Saudi Arabia, Thailand, and Ukraine), however, exhibit different behavior, with anomalous trends of self-citations. We argue that these anomalies should be attributed to the aggressive science policies adopted by these countries in recent years, which are all characterized by direct or indirect incentives for citations. Our analysis confirms that when bibliometric indicators are integrated into systems of incentives, they are capable of affecting rapidly and visibly the citation behavior of entire countries.
description: 44 pages, 15 figures
Ten Simple Rules for making a vocabulary FAIR
Creators: name: Cox, Simon J D
name: Gonzalez-Beltran, Alejandra N
name: Magagna, Barbara
name: Marinescu, Maria-Cristina
Publisher: name: arXiv
Year: 2020
Subjects: subject: Digital Libraries (cs.DL)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: We present ten simple rules that support converting a legacy vocabulary -- a list of terms available in a print-based glossary or table not accessible using web standards -- into a FAIR vocabulary. Various pathways may be followed to publish the FAIR vocabulary, but we emphasise particularly the goal of providing a distinct IRI for each term or concept. A standard representation of the concept should be returned when the individual IRI is de-referenced, using SKOS or OWL serialised in an RDF-based representation for machine-interchange, or in a web-page for human consumption. Guidelines for vocabulary and item metadata are provided, as well as development and maintenance considerations. By following these rules you can achieve the outcome of converting a legacy vocabulary into a standalone FAIR vocabulary, which can be used for unambiguous data annotation. In turn, this increases data interoperability and enables data integration.
description: 13 pages
Ο Μητροπολίτης Αργυροκάστρου και το Βορειοηπειρωτικό Ζήτημα:
Creators: name: Γιαννακού, Μαρία Νικήτα
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Βόρειος Ηπειρος
Επίσκοπος Αργυροκάστρου Παντελεήμων
Βορειοηπειρωτικό ζήτημα
North Epirus
Bishop of Argyrokastro Panteleimon
North Epirus issue

description: Ο ενιαίος και αδιαίρετος χώρος της Ηπείρου μετά το Πρωτόκολλο της Φλωρεντίας (17.12.1913) διχοτομείται και το βόρειο τμήμα της παραχωρείται από τις Μεγάλες Δυνάμεις στο νεοσύστατο κράτος της Αλβανίας για να μπορέσει να γίνει βιώσιμο ενώ το Νότιο παραμένει στην Ελλάδα. Έτσι ξεσπάει το Βορειοηπειρωτικό ζήτημα που αποτελεί βίαιη εξέλιξη του Ηπειρωτικού. Ακολουθούν μια σειρά καταλήψεων και απελευθερώσεων από τον ελληνικό στρατό στις περιοχές της Βορείου Ηπείρου. Συνθήκες, Πρωτόκολλα και συμφωνίες αλληλοδιαδέχεται το ένα το άλλο με αποτέλεσμα να επικρατήσει το θλιβερό Πρωτόκολλο της Φλωρεντίας. Μέχρι σήμερα το θέμα της Β. Ηπείρου είναι ανοιχτό μπροστά στο Συμβούλιο των Υπουργών Εξωτερικών των τεσσάρων Δυνάμεων. Το 1937 το Οικουμενικό Πατριαρχείο χορήγησε το Αυτοκέφαλο στην Εκκλησία της Αλβανίας και πρώτος επίσκοπος στην επαρχία Αργυροκάστρου εκλέχθηκε ο Παντελεήμων Κοτόκος. Χαρισματικός άνθρωπος με ηγετικά προσόντα. Διπλό το έργο του τόσο στον εκκλησιαστικό όσο και στον εθνικό τομέα. Αγωνίστηκε για τη λύση του Βορειοηπειρωτικού ζητήματος και συγχρόνως πάλεψε για την ένωση της Β. Ηπείρου με την Ελλάδα.
description: The united and impartible region of Epirus was bisected after the Protocol of Florence (17/12/1913) and the Northern part was awarded by the Great Powers to the newly formed state of Albania so it would become viable. The South part remained to Greece. That was the outbreak of the North Epirus issue, a violent development of the Epirus matter. Afterwards, a series of occupations and liberations by the Greek army at the North Epirus regions followed. A lot of Treaties, Protocols and agreements succeeded one another but the result was that the stark Protocol of Florence prevailed. Up to this day the North Epirus issue remains an open matter for the four Powers’ Foreign Ministers. In 1937 the Ecumenical Patriarchate granted to the Albanian church its autocephalous. The first elected Minister Bishop of Argyrokastro was Panteleimon Kotokos. Panteleimon had a very difficult duty, in ecclesiastical and national matters. He fought for the solution of the North Epirus issue and for the unity of North Epirus with Greece.