cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Undergraduate Student Assessment in Selected Public Universities of Ethiopia: A Qualitative Exploration of Conceptions and Practices
Creators: name: Zeleke, Seleshi
name: Habtamu, Kassahun
name: Dessie, Yekoyealem
name: Andualem, Tamirie
name: Admas, Fantahun
name: Teklu, Fiseha
name: Minaye, Abebaw
name: Kassa, Taglo
Publisher: name: The Ethiopian Journal of Education
Year: 2023

description: Despite its importance in the teaching-learning process and student motivation and engagement, student assessment in universities has received very limited research attention. This study explored conceptions and practices of student assessment in four public universities in Ethiopia. We obtained qualitative data from officials, instructors (through interviews), and undergraduate students (using focus group discussions). Most instructors conceptualized planning for student assessment as a very simplified plan comprising short descriptions of assessment tools and their relative weights that often appear in the course syllabus. Most participants rightly conceptualized continuous assessment (CA) as a procedure that comprises a variety of assessment tools that are administered continuously. In contrast, only a few instructors understood feedback as a comprehensive procedure useful for monitoring and improving students’ learning. The findings also indicate problems in the practices particularly in adequately planning for student assessment, in implementing CA effectively using a mix of methods; and in the provision of feedback that benefits students. The findings disclosed several gaps in both conceptions and practices of student assessment. However, we observed no clear differences in the conceptions and practices of undergraduate student assessment due to generations of universities. The views of the participants rather suggest, more or less, similar conceptions and practices of student assessment across the four universities.
description: The Ethiopian Journal of Education, Vol. 42 No. 2 (2022): The Ethiopian Journal of Education
Beiträge zur Geschichte des Antiken Glases. III Mykenisches Glas
Creators: name: Haevernick, Thea Elisabeth
Publisher: name: Verlag des Römisch-Germanischen Zentralmuseums Mainz
Year: 2017
Subjects: Bronzezeit; Südeuropa; Griechenland; Glas; Perlen; Gefäße

description: [nicht vorhanden / not available]
description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 7 (1960)
Beiträge zur Geschichte des Antiken Glases
Creators: name: Haevernick, Thea Elisabeth
Publisher: name: Verlag des Römisch-Germanischen Zentralmuseums Mainz
Year: 2017
Subjects: Bronzezeit; Südeuropa; Griechenland; Glas; Perlen; Gefäße

description: IV Gefäße mit vier Masken
V Kleine Beobachtungen technischer Art
description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 7 (1960)
Tätigkeitsbericht des Römisch-Germanischen Zentralmuseums für das Rechnungsjahr 1960 (1.4. bis 31.12.1960)
Creators: name: Böhner, Kurt
Publisher: name: Verlag des Römisch-Germanischen Zentralmuseums Mainz
Year: 2017

description: [nicht vorhanden / not available]
description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 7 (1960)
Barriers to Quality Education: Exploring the Perception of Government Primary School Principals - Evidence from Sebeta, Ethiopia
Creators: name: Zewdie, Denekew
Publisher: name: The Ethiopian Journal of Education
Year: 2023

description: The objective of this study is to investigate government primary school principals’ perceptions of barriers to quality education in schools. The study also identifies factors that impede the smooth functioning of the teaching and learning process in the schools. A case study design with qualitative methods was applied. Data were collected through semi-structured interview questions from seventeen school principals, and school observations in eight schools. Accordingly, the barriers to quality education were categorized under four premises: issues related to students, teachers, school facilities and management. Though the principals were aware of the concept of quality education and the factors affecting the provision of quality education, because of administrative work load, teachers’ health difficulties, students’ disciplinary problems, weak commitment from the city education office as well as the community, and the scarcity of teaching materials, the principals fell short of maintaining quality education in their schools.
description: The Ethiopian Journal of Education, Vol. 42 No. 2 (2022): The Ethiopian Journal of Education
Properties of BaTiO3/BaZrO3 ferroelectric superlattices with competing instabilities
Creators: name: Lebedev, Alexander I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Properties of (BaTiO$_3$)$_1$/(BaZrO$_3$)$_n$ ferroelectric superlattices (SLs) with $n = {}$1--7 grown in the [001] direction are calculated from first principles within the density functional theory. It is revealed that the quasi-two-dimensional ferroelectricity occurs in these SLs in the barium titanate layers with a thickness of one unit cell; the polarization is oriented in the layer plane and weakly interacts with the polarization in neighboring layers. The ferroelectric ordering energy and the height of the barrier separating different orientational states of polarization in these SLs are sufficiently large to provide the formation of an array of independent polarized planes at 300 K. The effect of the structural instability on the properties of SLs is considered. It is shown that the ground state is a result of simultaneous condensation of the $Γ_{15}$ polar phonon and phonons at the $M$ point (for SLs with even period) or at the $A$ point (for SLs with odd period); it is a polar structure with out-of-phase rotations of the octahedra in neighboring layers, in which highly polarized layers are spatially separated from the layers with strong rotations. The competition between the ferroelectric and structural instabilities in biaxially compressed SLs manifests itself in that the switching on of the octahedra rotations leads to an abrupt change of the polarization direction and can cause an improper ferroelectric phase transition to occur. It was shown that the experimentally observed $z$-component of polarization in the SLs can appear only as a result of the mechanical stress relaxation.
description: 8 pages, 5 figures, 3 tables; to appear in Physics of the Solid State in June 2013
Structure of Amplitude Correlations in open chaotic Systems
Creators: name: Ericson, Torleif E. O.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: An analytical approximation is found for the Verbaarschot-Weidenmueller-Zirnbauer solution. Its structure is discussed. The VWZ model is believed to correctly represent the correlations of two S-matrix elements for an open quantum chaotic system, but the solution has considerable complexity and is presently only accessed numerically. The present procedure gives its features explicitly over the full range of the parameter space in a transparent and simple analytical form preserving accuracy to a considerable degree.The bulk of the VWZ correlations are described by the Gorin-Seligman expression for the 2-amplitude correlations of the Ericson-Gorin-Seligman (EGS) model. The structure of the remaining correction factors for correlation functions is discussed with special emphasis of the role of the level correlation hole both for inelastic and elastic correlations.
description: 10 pages;as published in Phys. Rev. E Misprint and style corrections have been done. One reference added. On referee's request increased emphasis in conclusion
Implementation of Active Learning in Selected Secondary Schools of Oromiya Region and Addis Ababa City Administration: An Examination of Congruence between Theories and Practices
Creators: name: Dejene, Worku
Publisher: name: The Ethiopian Journal of Education
Year: 2023

description: This study examines the congruence between the theories and practices of active learning concerning its implementation in a few selected subjects. Accordingly, four specific research questions were raised. The study used the basic qualitative study method. Curriculum materials, teachers, curriculum experts, documents, teacher education experts, and school improvement program experts were data sources. By using available, purposive, and snowball sampling techniques, the study selected 39 teachers, four vice directors, eight university instructors, five experts, and two teacher education experts from the Federal Ministry of Education and five textbooks. Data were collected using interviews, observation, and document analysis. The collected data were analyzed using the constant comparative method of data analysis. The analysis showed that the research participants conceptualized learning in the positivist paradigm but tried to implement active learning (the result of different theories), without making a paradigm shift. Most teachers used teaching rather than letting the learners learn; i.e., implying that power is not properly shared between students and teachers in the design, implementation, and evaluation of the curriculum. In other words, curriculum materials are content-focused and alien to the students' lives; exams and assessments were meant only for decision-making (pass and failed) rather than letting students learn and develop. The study recommended that to alleviate the problems, trainers, teacher education institutions, and concerned parties need to help their respective trainees develop modern perspectives and the associated practices thereof.
description: The Ethiopian Journal of Education, Vol. 42 No. 2 (2022): The Ethiopian Journal of Education
Antike Mythologie in der gegenwärtigen Alltagskultur (Kinder- und Jugendliteratur, Belletristik und Film). Das griechisch-römische Sagengut als Fundus von prototypischen Einzelelementen und Motiven für die aktuelle Fantasy und Phantastik
Creators: name: Stierstorfer, Michael
Publisher: name: Pegasus-Onlinezeitschrift
Year: 2017

description: In seinem Artikel „Antike Mythologie in der gegenwärtigen Alltagskultur (KJL, Belletristik und Film). Das griechisch-römische Sagengut als Fundus von Desideraten und prototypischen Motiven für die aktuelle phantastische Literatur und den Fantasy-Film“ klärt Michael Stierstorfer die Bedeutung der derzeit so häufigen Adaption von Mythemen und gibt dabei einen Überblick über die Rezeptionsgeschichte der antiken Mythologie in der KJL sowie über mythopoetische Adaptionen in der KJL, Belletristik und auch im Film.
description: Pegasus-Onlinezeitschrift, Bd. 14, Nr. 1: Pegasus-Onlinezeitschrift
title: Уязвимость высокоточных (PPP) приемников ГНСС к имитационным помехам
Creators: name: ., А.Ю. Шатилов – к.т.н., доцент, кафедра радиотехнических систем, «Национальный исследовательский институт «МЭИ» E-mail: shatilov@srns.ru В.С. Лукьянов – аспирант, кафедра радиотехнических систем, «Национальный исследовательский институт «МЭИ» E-mail: lukianovvs_work@mail.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Сегодня для различных коммерческих целей требуется высокоточная навигационная аппаратура. Но, наряду с высокой точностью, такая аппаратура должна иметь и высокую надёжность, в том числе помехозащищённость. Уже существуют методы борьбы с имитационными помехами. Самым эффективным из них можно назвать использование антенных решёток. Однако такое решение может оказаться очень дорогим для покупки или не всегда приемлемым по другим причинам. Поэтому представляет интерес изучить действие самих высокоточных навигационных алгоритмов при действии имитационных помех.
Цель. Сделать экспериментальную оценку воздействия имитационных помех (ИП) на высокоточный приемник сигналов спутниковых радионавигационых систем, работающий на основе алгоритма Precise Point Positioning (РРР).
Результаты. Исследования продемонстрировали, что PPP-алгоритм блокирует решение навигационной задачи, если постановщик помех не создаёт на входе антенны потребителя навигационное поле похожее на навигационное поле в точке увода потребителя. Это говорит о более высокой защите PPP-алгоритмов от имитационных помех по сравнению со стандартными алгоритмами навигации. В тоже время PPP-решение может быть успешно уведено в результате действия имитационных помех ретрансляционного типа. Отмечено, что алгоритм PPP не может работать от имитатора сигналов. В данном случае, имитатор сигналов действует на PPP алгоритм как помеха. Решение навигационной задачи в этом случае не сойдётся из-за использования в алгоритме PPP сторонней эфемеридной информации, которая не соответствует тем данным, которые были заложены в имитатор сигналов.
Практическая значимость. Показаны условия, при которых ИП могут приводить к выдаче ложных координат в PPP-приемнике глобальных навигационных спутниковых систем. Проанализирована специфика высокоточных решений в навигационном PPP-приемнике при работе по сигналам от имитатора навигационных сигналов.
Induktive Grammatikeinführung unter allen Umständen? – Ergebnisse einer empirischen Untersuchung in der Spracherwerbsphase des LUs
Creators: name: Gwiasda, Denise
Publisher: name: Pegasus-Onlinezeitschrift
Year: 2017

description: Denise Gwiasda thematisiert in ihrem Artikel „Induktive Grammatikeinführung unter allen Umständen? – Ergebnisse einer empirischen Untersuchung in der Spracherwerbsphase des LUs“ eine zwischen August 2012 und September 2014 an niedersächsischen Gymnasien durchgeführte empirische Untersuchung zur Erlernung eines unbekannten lateinischen Grammatikphänomens nach dem induktiven oder deduktiven Prinzip, an der ca. 400 Schüler*innen teilnahmen. Bei der Auswertung der Ergebnisse geht sie u. a. auf spezielle Schülergruppen ein und liefert im Fazit aufschlussreiche Erkenntnisse.
description: Pegasus-Onlinezeitschrift, Bd. 15, Nr. 2: Pegasus-Onlinezeitschrift
Impacts of nutrient enrichment on insect emergence from vernal pools
Creators: name: Curry, Ryan
Publisher: name: No Publisher Supplied
Year: 2022

description: Intermittent wetlands provide ecosystem functions to surrounding landscapes and serve as breeding loci for various species of vertebrates and invertebrates. Many species of invertebrates develop in intermittent wetlands, emerging from the water to complete their life cycle while acting as prey resources for terrestrial predators. In this study, we investigated the effects of nutrient enrichment on insect larvae and subsequent effects on emerging adult insect populations across eight ponds in the New Jersey Pinelands, which varied in total nitrogen concentration and abundance of resources (chlorophyll-a, periphyton, FPOM, CPOM). We predicted that nutrient enrichment would affect the abundance and biomass of insects through its effects on pond primary production (chlorophyll-a and periphyton). We also expected that insect responses would differ among feeding groups due to their distinct reliance on algae, detritus, or insect prey. As hypothesized, the biomass of aquatic larval insects was indirectly affected by nutrient enrichment through changes in primary production quantified as chlorophyll-a concentration, but not via periphyton biomass. Further, nitrogen concentrations in the pond water influenced adult insect abundance, but not biomass; these responses were mediated by changes in periphyton biomass. Regression models of individual insect feeding groups showed unimodal relationships between omnivore biomass, predator biomass, and shredder/scraper abundance and FPOM, and between predator abundance and periphyton biomass. We also found a decrease in predator biomass with chlorophyll-a concentration. These results suggest that variations in N concentrations and resource availability in ponds can ultimately affect insect larvae and adult insect emergence. Further, insects belonging to different feeding functional groups responded in distinct manner to pond resources related to primary production or detritus availability. We suggest further research into communities in intermittent wetlands undergoing nutrient enrichment to determine if there are additional community-level responses of emerging insects to this stressor, specifically under a wider range of nutrient concentrations that reflect nutrient inputs to temperate aquatic ecosystems.
title: Экспериментальное исследование относительного позиционирования с помощью смартфонов на базе Android для задачи предупреждения столкновений автомобилей
Creators: name: ., Р.С. Куликов – к.т.н., зав. кафедрой радиотехнических систем, «Национальный исследовательский университет «МЭИ» E-mail: coolicoff@gmail.com А.А. Чугунов – аспирант, кафедра радиотехнических систем, «Национальный исследовательский университет «МЭИ» E-mail: iamchugunov@gmail.com
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Особое внимание в интеллектуальных транспортных системах уделяется обеспечению безопасности и надежности транспортного процесса. Добавление внешних сенсоров и датчиков в автомобили является существенным препятствием для масштабирования таких решений. С одной стороны, смартфон является как внешним измерительным устройством, фактически, приемником навигационных сигналов, так и средством коммуникации между транспортными средствами. Это обеспечивает возможность совместного использования измерений соседних автомобилей. Но с другой стороны смартфоны не обеспечивают точности позиционирования, достаточной для предупреждения столкновений автомобилей. Типовое значение погрешности местоопределения для смартфонов составляет единицы метров. В ряде зарубежных статей была достигнута субметровая (иногда сантиметровая) погрешность местоопределения с использованием различных методов навигации (PPP, RTK режим), но в данных статьях измерения проводились в «идеальных» условиях, когда смартфон находится под открытым небом, на крыше высокого здания или на специальном штативе. На практике смартфон в качестве навигационного приемника используется в автомобиле в условиях городской застройки, где часть навигационных спутников заслонена металлической крышей и высокими постройками. Поэтому исследование погрешности местоопределения в реальных условиях представляет особый интерес.
Цель. Представить результаты первых экспериментов по использованию первичных «сырых» измерений ГНСС приемника смартфона на базе Android для высокоточного относительного позиционирования транспортных средств в реальных условиях.
Результаты. Проведены полевые эксперименты с двумя автомобилями и пешеходом. Измерения проводились по 15 различным сценариям (обгон, поворот, встречная езда, и т.д.) непосредственно во время совершения маневров и в дальнейшем подверглись пост-обработке для получения оценок относительного позиционирования. Результаты, полученные с помощью смартфонов, сравнивались с более точными измерениями ГНСС-приемников с внешними антеннами в RTK-режиме.
Практическая значимость. Эксперименты показали, что в идеальных условиях смартфоны могут обеспечивать сантиметровую погрешность местоопределения, но в реальных условиях эта величина достигает единиц метров.
The Effect of Ye Enat Weg School Feeding Program on Student Academic Performance: The Case of Primary Schools in Yeka Sub-city Addis Ababa
Creators: name: Hailemariam, Tedla
name: Seyoum, Abrham
Publisher: name: The Ethiopian Journal of Education
Year: 2023

description: This study aims at investigating the impact of Ye Enat Weg School Feeding Program on students' academic performance specifically on students' average test scores and student absenteeism from school among primary school children in Yeka sub-city, Addis Ababa. This study used both primary and secondary data sources. A multistage sampling technique was used to select respondents. Accordingly, 225 students (103 study and 122 control groups) were selected from grade 6 and 7 students of two primary schools using a structured questionnaire. In this study, both descriptive analysis and econometric models are used to analyze the data. The independent sample t-test result shows that there is a significant mean difference between beneficiaries and non-beneficiaries of the school feeding program in terms of average score and absent days before the application of matching methods. To estimate the impact of the program on students’ academic performance Propensity Score Matching (PSM) model is applied with all four matching algorithms. Accordingly, the school feeding program significantly and positively impacted the average score of the study group. Regarding absent days, the impact of the school feeding program is significant in the Kernel matching method and stratification matching. (p < 0.01). The findings of this study call for the importance of ensuring the sustainability of the school feeding program.
description: The Ethiopian Journal of Education, Vol. 42 No. 2 (2022): The Ethiopian Journal of Education
D2.1 - Georeferenced Annelida distribution map along the Apulia coast
Creators: name: Musco, Luigi
name: Bilan, Meri
name: Langeneck, Joachim
name: Putignano, Matteo
name: Toso, Andrea
Publisher: name: Zenodo
Year: 2023

description: This is the first version of the Deliverable "D2.1 - Georeferenced Annelida distribution map along the Apulia coast", for the MAPWORMS project. This version will be available when it is approved by the EU.
Feuerwehr oder Fachbehörde? Oder: Wie messe ich den Abstand zwischen den Hörnern eines Dilemmas?
Creators: name: Winghart, Stefan
Publisher: name: DGUF e.V.
Year: 2017

description: [nicht vorhanden / not available]
description: Archäologische Informationen, Bd. 23, Nr. 1 (2000): Archäologische Informationen
Summer Upgrading Program at Colleges of Teacher Education and Its Impact on Improving Teachers’ Professional Growth and Students’ Achievement: Experiences from Tigray, Ethiopia
Creators: name: Michael, Kassa
name: Hailu, Mengistu
Publisher: name: The Ethiopian Journal of Education
Year: 2023

description: Teacher education and teachers’ professional competence as critical pillars guide efforts about educational growth in Ethiopia. The Tigray Regional State of Ethiopia embarked on a summer upgrading program for teachers from a certificate level to a diploma level in teaching at primary schools with the ultimate goal of improving teachers’ competence and students’ achievement. This study investigated the summer upgrading program and its impact on improving teachers’ professional growth and students’ achievement. A survey design was employed with multistage sampling and a sample of 514 upgraded teachers. A questionnaire, classroom observations, key informant interviews, and focus group discussions were employed. Data analysis revealed statistically significant differences between gender and among zones. The proportion of students with scores above 50% increased across the years with a 7% increase from 2014 to 2015, and a 10% increase from 2015 to 2016, while the proportion of scores above 75 was shown to be 1% from 2014 to 2015, and a 3% from 2015 to 2016. A significant difference was also observed between the expected and observed values in the proportion of students in each category of scores. Finally, the study concluded that the upgrading worked out for self-reflected professional growth, but not consistently on the learning achievements of students. It was recommended that to mitigate related problems concerned bodies should put in place mechanisms to ensure upgraded teachers demonstrate continued engagement in their schools; align the workplace situation and the upgrading programs, and devise ways of tracking career structure such as taking a certain number of credits each year.
description: The Ethiopian Journal of Education, Vol. 42 No. 2 (2022): The Ethiopian Journal of Education
A Framework for Characterizing the Atmospheres of Low-Mass Low-Density Transiting Planets
Creators: name: Fortney, Jonathan J.
name: Mordasini, Christoph
name: Nettelmann, Nadine
name: Kempton, Eliza M. -R.
name: Greene, Thomas P.
name: Zahnle, Kevin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We perform modeling investigations to aid in understanding the atmospheres and composition of small planets of ~2-4 Earth radii, which are now known to be common in our galaxy. GJ 1214b is a well studied example whose atmospheric transmission spectrum has been observed by many investigators. Here we take a step back from GJ 1214b to investigate the role that planetary mass, composition, and temperature play in impacting the transmission spectra of these low-mass low-density (LMLD) planets. Under the assumption that these planets accrete modest hydrogen-dominated atmospheres and planetesimals, we use population synthesis models to show that predicted metal enrichments of the H/He envelope are high, with metal mass fraction Z_env values commonly 0.6 to 0.9, or ~100 to 400+ times solar. The high mean molecular weight of such atmospheres (μ~ 5-12) would naturally help to flatten the transmission spectrum of most LMLD planets. The high metal abundance would also provide significant condensible material for cloud formation. It is known that the H/He abundance in Uranus and Neptune decreases with depth, and we show that atmospheric evaporation of LMLD planets could expose atmospheric layers with gradually higher Z_env. However, values of Z_env close to solar composition can also arise, so diversity should be expected. Photochemically produced hazes, potentially due to methane photolysis, are another possibility for obscuring transmission spectra. Such hazes may not form above T_eq of ~800-1100 K, which is testable if such warm, otherwise low mean molecular weight atmospheres are stable against atmospheric evaporation. We find that available transmission data are consistent with relatively high mean molecular weight atmospheres for GJ 1214b and "warm Neptune" GJ 436b. We examine future prospects for characterizing GJ 1214b with Hubble and the James Webb Space Telescope.
description: Accepted to The Astrophysical Journal on August 12, 2013. Minor changes, including new-subsection on mass-radius of LMLD planets
title: Фильтрация траекторных параметров в связанных координатах
Creators: name: ., К.К. Васильев – д.т.н., профессор, Ульяновский государственный технический университет Е-mail: vkk@ulstu.ru О.В. Саверкин – аспирант, кафедра «Телекоммуникации», Ульяновский государственный технический университет E-mail: saverkin-oleg@mail.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Основным недостатком известной линейной стохастической модели движения цели является привязка ускорений объекта наблюдения к базовой прямоугольной системе координат OXYZ. Однако направление движения и возможные маневры цели, как правило, никак не соотносятся с искусственно введенными координатами. Напротив, основные параметры модели в связанной системе координат определяются типом цели и не связаны с направлениями осей координат, используемых при сопровождении.
Цель. Создать модель движения цели и алгоритм фильтрации, не привязанные к прямоугольной системе координат.
Результаты. Рассмотрена модель движения в связанной с траекторией цели системе координат. Представлены аналитические выражения для двух возможных подходов полного определения моделей движения целей в связанных координатах при решении задач имитации траекторий, прогнозирования и фильтрации. По сравнению с известным линейным фильтром Калмана для алгоритмов, основанных на модели в связанных координатах, изменилось лишь выражение для расчета ковариационной матрицы ошибок прогнозирования. При оценивании траекторных параметров с использованием предложенных алгоритмов указанная ковариационная матрица будет содержать оценки параметров ускорения, полученные на основе значений путевой скорости, курса и угла наклона траектории, оцененных на предыдущем шаге фильтрации. За счет введения этих оценок обеспечивается подстройка фильтров к изменению характера движения сопровождаемого объекта. Другой особенностью является возможность выполнения раздельного по координатам оценивания траекторных параметров. Для исследования эффективности предложенных алгоритмов траекторной фильтрации была разработана математическая модель в среде MATLAB.
Практическая значимость. Проведенный сравнительный анализ показал, что алгоритм, основанный на модели в связанной системе координат, обеспечивает лучшую точность оценивания траекторных параметров по сравнению с известным фильтром Калмана при любых начальных условиях.
Cosmic ray acceleration and escape from supernova remnants
Creators: name: Bell, AR
name: Schure, KM
name: Reville, B
name: Giacinti, G
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Galactic cosmic ray (CR) acceleration to the knee in the spectrum at a few PeV is only possible if the magnetic field ahead of a supernova remnant (SNR) shock is strongly amplified by CR escaping the SNR. A model formulated in terms of the electric charge carried by escaping CR predicts the maximum CR energy and the energy spectrum of CR released into the surrounding medium. We find that historical SNR such as Cas A, Tycho and Kepler may be expanding too slowly to accelerate CR to the knee at the present time.
description: 17 pages, 5 figures, accepted for publication in the Monthly Notices of the Royal Astronomical Society
Multilevel Clustering in Point-To-Point Fiber Network Design
Creators: name: Van den Eynde, Simon
name: Audenaert, Pieter
name: Colle, Didier
name: Pickavet, Mario
Publisher: name: Zenodo
Year: 2022

description: Bandwidth demand is ever-increasing and expected to keep increasing for at least 15 years. One of the main ways to provide such bandwidth is through installing fiber to the home (FTTH). We propose and test three metaheuristic approaches to extend a single-level FTTH network design heuristic to multiple levels. Each heuristic is evaluated on realistic graphs with over 30000 nodes and 800 terminals. We find that all metaheuristics provide a small but significant gain in quality at the cost of more running time. Since fiber installment can be expensive, the metaheuristic improvements can be a valuable extension for FTTH network designers.
How to model marine reserves ?
Creators: name: Loisel, Patrice
name: Cartigny, Pierre
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: The safeguarding of resources is one of the principal subjects of halieutics studies. Among the solutions proposed to avert the disappearance of species, the setting in place of no take reserves is often mentioned. Most work on this subject, theoretical as well as applied, was undertaken in recent years. In this paper, we seek to compare two different models presented in existing literature by highlighting their underlying assumptions. Both models were derived from what is often referred to as the "model of Schaefer-Clark" (reference to the work of the last author on Mathematical Bioeconomics : Clark [7]). We show that various variations of this model lead to properties that can be very different.
Anticipated Interpretation: Three Dimensions of an Architectural Image
Creators: name: De Mey, Louis
name: Liefooghe, Maarten
name: Van Den Driessche, Maarten
Publisher: name: Zenodo
Year: 2022

description: The architecture culture of the last two decades shows a significant investment in the construction of architectural images. Moreover, a specific but fluid attention to historical continuities is discernible. The research studies how these images are constructions that go beyond their representational function, starting from the hypothesis of the ‘thickness’ of the images and visual discourse produced through them. The research analyses them as forms of anticipated interpretation, as visual constructions that direct the interpretation and do so beyond the individual image and project.
 This poster focuses on a particular image to unfold the stakes in three dimensions of architectural images. There is a crucial amount of direction done both in the image itself, in the set images of a project, as well as in a concrete setting in which the image is on display. This direction implies a ‘way of looking’ and actively formulates a position in (a) an image culture, (b) an architectural history and tradition and (c) an architectural field.
Apa dan Bagaimana 'Database Alarm'
Creators: name: Gunawan, Fahmi
Publisher: name: Zenodo
Year: 2021
Subjects: Scopus Database
Google scholar database
Database alarm

description: Database alarm merujuk pada sebuah notifikasi publikasi terbaru yang terbit di sebuah database tertentu kepada seorang penulis. Notifikasi itu menjadi penting untuk dapat dijadikan selain sebagai referensi, juga sebagai artikel mentor bagi penulis ketika hendak menulis sesuai tema yang diminati. Dalam PPT ini, dua database dijadikan sebagai sampel pembahasan. Hasilnya dapat diamati pada slide-slide berikut.
description: {"references": ["Fahmi Gunawan. (2021, August 3). Navigasi Referensi Berbasis Bibliometrik. Zenodo. https://doi.org/10.5281/zenodo.5155955", "Fahmi Gunawan. (2021, August 7). Literasi Artikel Jurnal Ilmiah. Zenodo. https://doi.org/10.5281/zenodo.5168131"]}
Technomyrmex Mayr 1867
Creators: name: Forel, A.
Publisher: name: L'Imprimerie Nationale
Year: 1891
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Technomyrmex

description: Genre TECHNOMYRMEX.
Technomyrmex, Mayr, Annali del Museo civico di Genova (1872).
[[worker]]. De grandeur constante. Orifice du cloaque grand, non cilié, apical et transversal. Gésier court et large avec un grand calice réfléchi, en forme de cloche, divisé en quatre élévations convexes, recouvrant presque entièrement la boule et laissant voir une structure microscopique aréo- laire. Palpes maxillaires de six, labiaux de quatre articles. Fossette clypeale réunie à la fossette antennaire. Epistome prolongé entre les insertions des antennes. Aire frontale grande, indistincte. Ecaille entièrement couchée et collée au pétiole. Dos de l'abdomen prolongé en avant et recouvrant le pédicule. Glandes anales inconnues. Abdomen pointu à son extrémité.
[[queen]]. Comme l'ouvrière et seulement un peu plus grande qu'elle. Ailes à une ou deux cellules cubitales, sans cellule discoïdale.
[[male]]. Organes génitaux externes (T. Mayri) grands, surtout les écailles qui sont très développées. Valvules extérieures en triangle equilateral, plus ou moins arrondies à l'extrémité. Entre les valvules internes, on voit une sorte de feutre blanchâtre, poilu, qui les recouvre en partie comme une membrane et dont la nature ne m'est pas claire. Les valvules internes sont soudées entre elles et fortement denticulées. Les valvules moyennes sont longues et étroites avec une longue partie basale surmontée de deux prolongements dont l'externe, très contourné, est le plus long. Ailes avec une cellule cubitale et sans cellule discoïdale. Ecaille épaisse, cunéiforme, fortement inclinée en avant.
description: Published as part of Forel, A., 1891, Histoire naturelle des Hymenopteres. Deuxieme partie: Les Formicides., pp. 1-231 in Histoire Physique, Naturelle et Politique de Madagascar., Paris :L'Imprimerie Nationale on page 97, DOI: 10.5281/zenodo.9896
Adapting Routing Algorithms to Programmable Photonic Circuits
Creators: name: Vanden Kerchove, Ferre
name: Chen, Xiangfeng
name: Colle, Didier
name: Bogaerts, Wim
name: Pickavet, Mario
Publisher: name: Zenodo
Year: 2022

description: Photonic integrated circuits manipulate light at microscopic scales on the surface of a chip. In parallel with their electronical counterparts, interest is shifting from application specific designs to programmable circuits, offering greater flexibility and shorter design times. To utilize the full potential of programmable photonic integrated circuits, special software routines need to be developed to determine the optical paths inside the mesh. We develop an algorithm that quickly returns an efficient configuration. For this, it only requires the mesh topology, but otherwise works hardware-agnostic. We compare the results of our algorithm to earlier proposed algorithms and to an optimal solution where possible.
Photon Emission from a Medium-Modified Shower Evolution
Creators: name: Renk, Thorsten
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Photons from the interaction of a highly energetic jet with a thermal medium are an important contribution to the total photon yield measured in ultrarelativistic heavy-ion collisions and also an important probe to study the medium degrees of freedom. Previously this contribution has often been computed in the context of a leading parton energy loss approximation. In this work, jet-medium interaction photons are instead estimated using a medium-modified shower evolution model, where the energy degradation due to vacuum radiation prior to medium formation, the virtuality evolution of intermediate states and the photon emission from subleading shower partons is taken into account consistently. The results indicate that the leading parton energy loss approximation does not appear to work well for photon emission from jet-medium interaction.
description: 5 pages, 3 figures
Fire Inception in Microgravity: Orbital Experiment BRE-Flamenco Onboard the International Space Station, 2019-2021
Creators: name: Snegirev, Alexander
Publisher: name: Zenodo
Year: 2022

description: A possible scenario of fire inception in microgravity is ignition and burning of solid or liquid materials followed by the flame growth and spread. In this scenario, as well as in normal gravity, flammability of the material is directly coupled with the stability of gaseous flame. Until recently, transient dynamics and stability of the low momentum diffusion flames emanating at the flat surface into the stagnant atmosphere in microgravity has not been investigated. To date, we even could not predict whether this kind of flame can attain its steady state. This poster presents an overview of the orbital experiment BRE-Flamenco performed onboard the International Space Station in 2019-2021, jointly with the theoretical and numerical analysis of the experimental results.

 The key findings of this work disclose the major effects of the reduced gravity on laminar diffusion flames, including dramatic increase of the radiative fraction in the energy balance casing flame extinction. This flame extinction is identified as the radiative one, which is opposed to the strain-induced blow-off occurring in normal gravity. The flame is shown to be inherently unstable: the initial phase of steady flame growth is interrupted by local flame extinction followed by flame oscillations (of toroidal, spiral, capuchin type) and complete extinguishment. It has been established, that a steady flame can only exist at high oxygen concentration and low fuel supply rate (characteristic of solid or liquid combustibles), and the critical condition for the steady flame to exist has been proposed. Approximate theory developed in this work is shown to predict the critical pre-extinction flame size, while the transient flame dynamics including formation of triple flames is favorably replicated in detailed CFD simulations.
title: Влияние параметров режима работы на энергетические характеристики субмодулей выходных усилителей мощности Х диапазона
Creators: name: ., Р.Г. Тарасов – ген. директор АО «НПП «Завод «Искра», зав. базовой кафедрой «Радиотехнические системы и технологии», Ульяновский государственный технический университет E mail: rgtarasov@yandex.ru, В.А. Сергеев – д.т.н., профессор, директор УФИРЭ им. В.А. Котельникова РАН,  зав. базовой кафедрой «Радиотехника, опто- и наноэлектроника», Ульяновский государственный технический университет E mail: sva@ulstu.ru А.А. Куликов – к.т.н., вед. инженер, УФИРЭ им. В.А. Котельникова РАН (г. Ульяновск) E mail: kulikovaa36@yandex.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Известно, что выходная мощность и коэффициент полезного действия (КПД) современных GaAs монолитных интегральных схем (МИС) в значительной степени зависят от напряжения питания, температуры и условий согласования с нагрузкой.
Цель. Исследовать зависимости выходной мощности GaAs МИС СВЧ-усилителей и субмодулей ВУМ, содержащих две МИС СВЧ-усилителей, от температуры и напряжения питания и определить возможность диагностического контроля качества ВУМ по указанным зависимостям.
Результаты. При исследовании зависимости выходной мощности GaAs МИС СВЧ-усилителей Х диапазона типов 1201 и ХР1006-BD от длительности и скважности радиоимпульсов у всех образцов исследованных МИС наблюдалось небольшое (~0,2 дБм) снижение выходной мощности с ростом длительности радиоимпульсов от 50 до 2000 мкс при заданной скважности Q. При этом уровень выходной мощности МИС при малой скважности импульсов Q = 5 заметно меньше, чем при скважности 50 и 100, что объясняется саморазогревом МИС рассеиваемой мощностью. Измерения выходной мощности субмодулей ВУМ с двумя МИС типа ХР1006-BD, выполненные в номинальном режиме в диапазоне температур 20…110°С, показали, что у всех исследованных образцов ВУМ выходная мощность заметно (на 1,5…2,0 Вт) снижается с ростом температуры. При этом, чем больше начальный уровень выходной мощности ВУМ при комнатной температуре, тем меньше крутизна температурной зависимости. С уменьшением напряжения питания от 8,5 до 6 В выходная мощность исследованных ВУМ практически линейно снижается со средней выборочной крутизной 2,0 Вт/В и СКО 0,15 Вт/В. Крутизна этой зависимости возрастает с ростом температуры и при температуре 45°С для измеренных образцов повышалась до 2,4 Вт/В.
Практическая значимость. Показана возможность диагностического контроля качества ВУМ по указанным зависимостям, в частности, для отбраковки потенциально ненадежных субмодулей ВУМ можно использовать значение крутизны зависимости выходной мощности от напряжения питания или критического напряжения питания при повышенной температуре.
Inorganic Membranes Allow for a More Clever Use of Nanoparticles As CO2 Conversion Catalyst
Creators: name: Loccufier, Eva
name: Watson, Geert
name: Zhao, Yingrui
name: Meledina, Maria
name: Van Der Voort, Pascal
name: Debecker, Damien
name: D'hooge, Dagmar R.
name: De Buysser, Klaartje
name: De Clerck, Karen
Publisher: name: Zenodo
Year: 2022

description: An important challenge in the valorization of CO2 and H2 into fuels is the development of a stable, reusable and easy to handle heterogeneous catalyst. Here, a silica nanofibrous membrane is investigated as carrier for Ru nanoparticles, themselves encapsulated inside the metal organic framework Cr-MIL-101. The catalytic membrane is investigated for the Sabatier methanation reaction. The direct electrospinning of a tetraorthosilicate sol-gel system results in a highly thermal resistant silica nanofibrous structure (up to 1100°C) with a large amount of pores between the fibers in the µm-range, allowing a high gas throughput with low pressure requirements. A straightforward dip-coating procedure of the carrier was used to obtain a Ru@MIL-101 functionalized silica nanofibrous veil, avoiding Ru clustering. The obtained catalytic membrane exhibited an apparent turnover frequency of 3257 h-1 at 250°C. This system therefore paves the way towards structured reactors for efficient CO2 hydrogenation processes.
The Eigenvectors of the Zero Laplacian and Signless Laplacian Eigenvalues of a Uniform Hypergraph
Creators: name: Hu, Shenglong
name: Qi, Liqun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: In this paper, we show that the eigenvectors of the zero Laplacian and signless Lapacian eigenvalues of a $k$-uniform hypergraph are closely related to some configured components of that hypergraph. We show that the components of an eigenvector of the zero Laplacian or signless Lapacian eigenvalue have the same modulus. Moreover, under a {\em canonical} regularization, the phases of the components of these eigenvectors only can take some uniformly distributed values in $\{\{exp}(\frac{2jπ}{k})\;|\;j\in [k]\}$. These eigenvectors are divided into H-eigenvectors and N-eigenvectors. Eigenvectors with minimal support is called {\em minimal}. The minimal canonical H-eigenvectors characterize the even (odd)-bipartite connected components of the hypergraph and vice versa, and the minimal canonical N-eigenvectors characterize some multi-partite connected components of the hypergraph and vice versa.
description: 22 pages, 3 figures
title: Интерферометры на основе вставок оптических волокон с тонкой сердцевиной SM600 и SM450
Creators: name: ., Л.И. Юсупова – студентка, кафедра «Радиотехника, опто- и наноэлектроника», Ульяновский государственный технический университет E mail: lesanusupova@gmail.com О.В. Иванов – д.ф.-м.н., кафедра «Радиотехника, опто- и наноэлектроника», Ульяновский государственный технический университет, Ульяновский филиал ИРЭ им. В.А. Котельникова РАН E mail: olegivvit@yandex.ru
Publisher: name: Издательство Радиотехника
Year: 2019

description: Постановка проблемы. Оптоволоконные структуры со вставками нестандартных волокон, спектральные характеристики которых определяются взаимодействием и преобразованием нескольких волоконных мод различных типов, привлекают значительный интерес благодаря простоте их создания, компактности, возможности использования для измерения параметров внешней среды. Волоконные структуры со вставками, возбуждающими оболочечные моды, находят применения в качестве датчиков влажности, температуры, показателя преломления внешней среды и других. Для обеспечения связи моды сердцевины и мод оболочки используются вставки из многомодовых волокон, волокна с тонкой сердцевиной, без сердцевины и микроструктурированные волокна.
Для повышения чувствительности волоконных структур, использующих моды оболочки, создаются интерферометры путем объединения пары элементов, преобразующих различные моды волокна друг в друга. Для датчиков, работающих в режиме отражения, интерферометр может быть выполнен с использованием одиночного элемента, через который моды проходят дважды. Модовый интерферометр образуется при вставке волокна с тонкой сердцевиной, вваренной между стандартными волокнами. В такой структуре моды оболочки возбуждаются на стыке двух волокон из-за сильного различия их профилей показателя преломления.
Цель. Предложить волоконный интерферометр нового типа на основе двух коротких вставок из волокон с тонкой сердцевиной SM600 и SM450, разделенных секцией стандартного волокна SMF-28.
Результаты. Вставки из волокна с тонкой сердцевиной возбуждают моды оболочки и обеспечивают обмен энергией между различными модами волокна. Отрезок стандартного волокна используется для накопления разности фаз между модами сердцевины и оболочки, распространяющимися через структуру. Измерены спектры пропускания для различных длин интерферометра. Найдены оптимальные параметры вставок волокон SM600 и SM450 для получения максимальной амплитуды модуляции в спектре. Для волокна SM600 оптимальная длина вставки составляет 0,3…0,8 мм, а для волокна SM450 – 0,1…0,4 мм.
Практическая значимость. Интерферометр, предложенный в данной работе, может быть использован как чувствительный элемент в различных датчиках, например, в датчике изгиба или показателя преломления.
Note a margine di un’inedita (e discussa) condanna del RLS per omicidio colposo
Creators: name: Contri, Francesco
Publisher: name: Diritto della sicurezza sul lavoro
Year: 2023

description: La recentissima sentenza con la quale la Suprema Corte ha confermato la condanna (doppia conforme) del RLS per omicidio colposo ai danni di un lavoratore ha sin da subito suscitato forti critiche da parte dei cultori della sicurezza del lavoro (penalisti e non). Con il presente scritto si intende quindi approfondire la legittimità di una possibile responsabilizzazione di tale figura lavorativa per delitti colposi di evento dannoso alle persone, valorizzando, da un lato, i dati normativi che regolano le prerogative del RLS; dall’altro lato, le concezioni inclini a superare un modello di responsabilità incapace di riflettere il frequente riparto tra doveri e poteri nell’attuale conformazione “organizzata” delle attività economiche
description: Diritto della sicurezza sul lavoro, N. 2 (2023)