cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sonnenfleckenzeichnung Nr. 284.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 14.12.1987, 08:45, erstellt von Michele Bianda, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Investigations of Carbapenem-resistant Klebsiella species and associated clinical considerations
Creators: name: Shibu, Preetha
Publisher: name: University of Westminster
Year: 2019

description: The use of many antibiotics to treat infections has become limited in the last decade. Enterobacteriaceae, especially Klebsiella spp., have acquired resistance to quinolones, aminoglycosides, cephalosporins and carbapenems. Resistance to β-lactams is mediated via extended-spectrum β-lactamases, AmpC type β-lactamases and carbapenemases combined with porin loss. Carbapenems are the antibiotics of last resort. The emergence of carbapenemase-producing organisms (CPOs) has led to Public Health England introducing a national toolkit to limit their spread. As part of this requirement, the Charing Cross microbiology laboratory of the Imperial College Healthcare NHS Trust revised its screening programme for the detection of CPOs. This improved the detection and isolation of CPOs, and highlighted Klebsiella spp. were more of a problem with respect to multidrug resistance than previously thought. Thirty-nine carbapenem-resistant Klebsiella strains were characterised. Phenotypic tests identified the strains as Klebsiella pneumoniae (n = 36) and Klebsiella oxytoca (n = 3). Detailed whole-genome sequence (WGS) analyses showed the K.oxytoca were Klebsiella michiganensis and one of the K. pneumoniae strains to be Klebsiella variicola subsp. variicola. The K. michiganensis strains were all of sequence type 138. They were predicted to encode the β-lactamases blaGES-5, blaSHV-66, blaTEM-1, blaOXA and blaCTX-M-15, and the 12- gene operon of the kleboxymycin biosynthetic gene cluster. This gene cluster encodes for tilimycin and tilivalline, enterotoxins previously thought only to be carried by K. oxytoca strains. Incorporation of antimicrobial resistance and virulence gene data showed hypervirulent, multidrug-resistant K. pneumoniae strains encoding both aerobactin and rmpA (the regulator of mucoid phenotype) or colibactin are present in West London Hospitals. These are a cause for concern, as they have the potential to cause outbreaks that are untreatable. WGS analyses yield more accurate and comprehensive data compared with phenotypic testing, enabling exact identification of clinically important strains, detailed outbreak investigations and molecular characterisation of antibiotic resistance and virulence genes in clinical settings. Thirty-two bacteriophages were isolated from sewage water and found to infect one or more of the clinical Klebsiella isolates. Some phages with broad host ranges (i.e. they infected K. pneumoniae, K. michiganensis, K. variicola and K. grimontii strains) were identified, which may have use in clinical therapeutics against multidrug-resistant infections. These bacteriophages remain to be characterised in detail.
Sonnenfleckenzeichnung Nr. 233.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 24.09.1987, 08:00, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Renormalization-group improved fully differential cross sections for top pair production
Creators: name: Broggio, A.
name: Papanastasiou, A. S.
name: Signer, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We extend approximate next-to-next-to-leading order results for top-pair production to include the semi-leptonic decays of top quarks in the narrow-width approximation. The new hard-scattering kernels are implemented in a fully differential parton-level Monte Carlo that allows for the study of any IR-safe observable constructed from the momenta of the decay products of the top. Our best predictions are given by approximate NNLO corrections in the production matched to a fixed order calculation with NLO corrections in both the production and decay subprocesses. Being fully differential enables us to make comparisons between approximate results derived via different (PIM and 1PI) kinematics for arbitrary distributions. These comparisons reveal that the renormalization-group framework, from which the approximate results are derived, is rather robust in the sense that applying a realistic error estimate allows us to obtain a reliable prediction with a reduced theoretical error for generic observables and analysis cuts.
title: Εκτίμηση γενετικής παραλλακτικότητας μεταξύ και εντός τοπικών πληθυσμών καλαμποκιού για χαρακτηριστικά παραγωγικής συμπεριφοράς αγρού
titleType: AlternativeTitle
Creators: name: Ζαχαρούλη, Εριφύλη Γ.
Publisher: name: University of Thessaly
Year: 2004
Subjects: subject: ΚΑΛΑΜΠΟΚΙ -- ΓΕΝΕΤΙΚΗ -- ΕΡΕΥΝΑ
subject: ΚΑΛΑΜΠΟΚΙ -- ΒΕΛΤΙΩΣΗ

description: Παρατηρήσεις έκδοσης: κακέκτυπες σελίδες.
description: Σκοπός της παρούσας εργασίας ήταν η μελέτη της γενετικής παραλλακτικότητας μεταξύ και εντός πέντε τοπικών παραδοσιακών πληθυσμών καλαμποκιού, σε μια προσπάθεια διερεύνησης πιθανής αξιοποίησής τους σε προγράμματα βελτίωσης. Το φυτικό υλικό πειραματισμού αποτέλεσαν πέντε τοπικοί παραδοσιακοί πληθυσμοί που διατηρούνται στο Ινστιτούτο Σιτηρών του ΕΘΙΑΓΕ. Οι πληθυσμοί αυτοί ήταν οι εξής: 1. πληθυσμός 1:102/GR-OP-84 2. πληθυσμός 2: 30/GR-OP-163 3. πληθυσμός 3:163/GR-OP-85 4. πληθυσμός 4: 28/GR-OP-183 5. πληθυσμός 5: 141/GR-OP-12 Ως μάρτυρας χρησιμοποιήθηκε το απλό υβρίδιο Constanza. Το πείραμα πραγματοποιήθηκε κατά την καλλιεργητική περίοδο 2002-2003 στο αγρόκτημα του Πανεπιστημίου Θεσσαλίας στο Βελεστίνο. Το σύνολο των πληθυσμών εμφάνισε ικανοποιητική γενετική διακύμανση για το χαρακτηριστικό της απόδοσης. Για το χαρακτηριστικό Ποσοστό εκκοκισμούο ο πληθυσμός I63/GR-OP-85 βρέθηκε να διαθέτει σχετικά υψηλή γενετική διακύμανση. Για το χαρακτηριστικό εκτίμηση της τιμής SPAD στο στάδιο γεμίσματος του κόκκου 25 ημέρες από την άνθηση ο πληθυσμός 141/GR-OP-12 και ο πληθυσμός 28/GR-OP-183 βρέθηκε να διαθέτουν ικανοποιητική γενετική διακύμανση. Για το χαρακτηριστικό εκτίμηση της τιμής SPAD στο στάδιο γεμίσματος του κόκκου 50 ημέρες από την άνθηση ο πληθυσμός 141/GR-OP-12 βρέθηκε να διαθέτει μεγαλύτερο αριθμό γενοτύπων που διατηρούν το πράσινο χρώμα των φύλλων τους μέχρι και αυτό το στάδιο. Για το χαρακτηριστικό ταχύτητα φυτρώματος ο πληθυσμός 102/GR-OP-84 και ο πληθυσμός 28/GR-OP-183 βρέθηκε να διαθέτουν επαρκή γενετική διακύμανση. Για το χαρακτηριστικό πολυδημία ο πληθυσμός 102/GR-OP-84 βρέθηκε να διαθέτει επαρκή γενετική παραλλακτικότητα όπως και για το χαρακτηριστικό υγρασία σπόρου. Επιβεβαιώθηκε η σχετικά υψηλή συσχέτιση της απόδοσης με την τιμή SPAD στα στάδια στα οποία μετρήθηκε κατά την προσομείωση επιλογής για την τιμή SPAD. Κρίσιμο στάδιο για την επιλογή υψηλής τιμής SPAD βρέθηκαν το βλαστικό και το αναπαραγωγικό στάδιο. Γενικά ο πληθυσμός 141/GR-OP-12 παρουσιάζει το μεγαλύτερο ενδιαφέρον για επιλογή υψηλοαποδοτικών γενοτύπων μιας και είχε την καλύτερη συσχέτιση μεταξύ απόδοσης και χλωροφύλλης- ενώ ο πληθυσμός 163/GR-OP-85 φαίνεται να είναι ο πιο ευαίσθητος στις διάφορες καταπονήσεις (σε συνδυασμό με το γεγονός ότι παρουσίασε το υψηλότερο στέλεχος από τους πέντε πληθυσμούς). Ο πληθυσμός28/ΌΚ-ΟΡ-183 παρουσιάζει ενδιαφέρον για την διερεύνηση γονιδίων πολυδημίας στους γενοτύπους του. Επίσης ενδιαφέρον παρουσιάζει ο πληθυσμός 30/GR-OP-163 επειδή ήταν πρωιμότερος από τους πέντε πληθυσμούς τόσο στο φύτρωμα όσο και στην είσοδο του πληθυσμού στο στάδιο της ανθοφορίας.
Slicing the Fock space for state production and protection
Creators: name: Rossetti, R. F.
name: Neto, G. D. de Moraes
name: Prado, F. O.
name: Brito, F.
name: Moussa, M. H. Y.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this letter we present a protocol to engineer interactions confined to subspaces of the Fock space in trapped ions: we show how to engineer upper-, lower-bounded and sliced Jaynes-Cummings (JC) and anti-Jaynes-Cummings (AJC) Hamiltonians. The upper-bounded (lower-bounded) interaction acting upon Fock subspaces ranging from $\left\vert 0\right\rangle $ to $\left\vert M\right\rangle $ ($\left\vert N\right\rangle $ to$\ \infty$), and the sliced one confined to Fock subspace ranging from $\left\vert M\right\rangle $ to $\left\vert N\right\rangle $, whatever $M
Involving students in teaching: analysis of an educational innovation pathway at University
Creators: name: Cecchinato, Graziano
name: Foschi, Laura Carlotta
Publisher: name: Form@re - Open Journal per la formazione in rete
Year: 2018

description: This paper describes the teaching innovation process as it was tested in one of the University courses through the adoption of a methodological approach based on the constructivist approach. The process that led us to progressively overcome the frontal teaching in favor of active learning practices is analyzed. Specifically, students have been involved in the co-construction of content (Student-generated content), in conducting teaching activities (Reciprocal peer teaching) as well as in their assessment (Peer assessment). Overall the process led to strongly revise traditional University teaching (lecture - individual study - final exam). The adopted approach has been evaluated by using the descriptive and inferential analysis. Based on results we can say that the course promoted meaningful learning for students and the development of specific skills related to the topics discussed. Coinvolgere gli studenti nell’insegnamento: analisi di un percorso di innovazione didattica all’Università L’articolo documenta il processo di innovazione didattica di un insegnamento universitario tramite l’adozione di un approccio metodologico ispirato al costruttivismo. Viene analizzato il processo che ha portato al progressivo superamento della didattica frontale in favore di pratiche di apprendimento attivo. Nello specifico gli studenti sono stati coinvolti nella co-costruzione dei contenuti (Student-generated content), nella conduzione delle attività didattiche (Reciprocal peer teaching) e nella loro valutazione (Peer assessment). Nell’insieme il processo ha portato a una profonda revisione dei momenti classici della didattica universitaria (lezione frontale - studio individuale - esame finale). L’approccio adottato è stato valutato con analisi di carattere descrittivo e inferenziale. I risultati consentono di ritenere che il Corso ha promosso negli studenti un apprendimento significativo e contribuito a far maturare specifiche competenze nell’ambito dei contenuti proposti.
description: Form@re - Open Journal per la formazione in rete, Vol. 18 No. 1 (2018): University education: quality, effectiveness, teacher training
Combustion Instabilities Induced by Multi-Stepped Hybrid Rocket Fuel Grains
Creators: name:  ARTUR ELIAS DE MORAIS BERTOLDI
name:   CHRISTOPHER GLASER
name:   JOUKE HIJLKEMA
name:   JEAN-YVES LESTRADE
name:   JEROME ANTHOINE
name:    PATRICK HENDRICK
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: COMBUSTION INSTABILITIES
HYBRID ROCKET

description: Previous research using Forward Facing Steps (FFS) and Backward Facing Steps (BFS) in the solid fuel grain demonstrated increased regression rates compared to a cylindrical single port. Nonetheless, it is important to assess the combustion instabilities induced by stepped geometries to anticipate (and solve) potential negative side effects. This paper addresses the preliminary experimental results for single and multi-step configurations and their combustion chamber pressure oscillations. Additionally, the impact of a stepped helix approach on the corn bustion behaviour is assessed. Pressure oscillations in hybrid rockets are not likely to be as limiting compared to their liquid and solid counterparts. However, the instabilities might significantly affect the performance and payload comfort of the propulsive system. In this study, we analyse the interaction between the pressure oscillations in the combustion chamber and the other parameters of the HYCAT (HYbrid with CATalyst) hybrid rocket motor at ONERA We show that although steps play a major role in pressure oscillations and significantly alter the combustion behaviour of the engine, none of the stepped cases exceeded the most instable no-step test; on the contrary, especially BFSs have the potential to decrease pressure oscillations. This remark is important because multi-stepped grains have significantly higher regression rates (26 % to 245 %) than the cylindrical reference cases.
Sonnenfleckenzeichnung Nr. 50.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.03.1987, 09:15, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 63.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 19.03.1987, 09:30, erstellt von Marco Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Fatores que influenciam o declínio da recarga de água em zonas úmidas: Uma análise bibliométrica
Creators: name: Saldaña-Escorcia, Rossember
Publisher: name: Zenodo
Year: 2023
Subjects: Atividades antropogênicas, análise bibliométrica, zonas úmidas, mapeamento, recursos hídricos

description: As zonas úmidas são ecossistemas que fornecem múltiplos serviços ambientais à sociedade; entretanto, vários fatores como as variações climáticas, a expansão da fronteira agrícola e o crescimento populacional alteram o status ecológico e diminuem os serviços, incluindo a recarga de água, que desempenha um papel importante no ciclo hidrológico, pois mantém o equilíbrio do ecossistema. Este artigo apresenta uma análise bibliométrica para analisar as tendências dos fatores que afetam a recarga de água em áreas úmidas, com base em 150 artigos citados no banco de dados Scopus® entre 2000 e 2021. Para a análise, o software SciMAT foi utilizado para analisar a evolução dos conceitos através de diagramas estratégicos relacionados aos autores, instituições, periódicos, países e principais publicações; e o software VOSviewer foi utilizado para identificar e visualizar a relação entre os principais conceitos de pesquisa. Os resultados mostram um aumento nos estudos relacionados às zonas úmidas e aos fatores que alteram os serviços dos ecossistemas, como a recarga de água, no interesse da gestão sustentável dos ecossistemas e da governança dos recursos naturais. É também evidente que os países com maior produção são os EUA e a China.
A Green-Naghdi model in a 2D problem of a mode i crack in an isotropic thermoelastic plate
Creators: name: Abbas Ibrahim, A.
name: Alzahrani Faris, S.
Publisher: name: Физическая мезомеханика
Year: 2018
Subjects: GREEN AND NAGHDI MODELS
FINITE ELEMENT METHOD
MODE I CRACK
THERMOELASTICITY
МОДЕЛИ ГРИНА-НАГДИ
МЕТОД КОНЕЧНЫХ ЭЛЕМЕНТОВ
ТРЕЩИНА ОТРЫВА
ТЕРМОУПРУГОСТЬ

description: В статье в рамках теории обобщенной термоупругости на основе моделей Грина-Нагди рассмотрено термоупругое взаимодействие в изотропном материале, в объеме которого присутствует трещина конечной длины. Границы трещины определяются заданной температурой и распределением напряжений. Постановка задачи выполнена в рамках теории обобщенной термоупругости на основе моделей Грина-Нагди типа II и типа III с соответствующим выбором параметров. С помощью метода конечных элементов найдены значения компонент смещения, температуры и компонент напряжений. Выполнена численная верификация результатов. Проведено сравнение с результатами на основе моделей Грина-Нагди типа III и типа II.In this article, the generalized thermoelastic theory under Green and Naghdi models are used to study the thermoelastic interaction in an isotropic material containing a finite crack inside the material. The crack boundary is due to a prescribed temperature and stress distribution. Based on the Green-Naghdi type II and type III models, the formulation is applied to generalized thermoelasticity with an appropriate choice of parameters. Numerical solutions of the displacement components, temperature, and stress components are obtained using the finite element method. The results have been verified numerically and are represented graphically. Comparisons were made with expected results from Green and Naghdi model of type III and Green and Naghdi model of type II.
Fracture assessment of inclined double keyhole notches in isostatic graphite
Creators: name: Salavati Hadi
name: Alizadeh Yoness
name: Ayatollahi Majid, R.
Publisher: name: Физическая мезомеханика
Year: 2018
Subjects: BRITTLE FAILURE
KEYHOLE NOTCH
LOADING MODE RATIO
GRAPHITE
ХРУПКОЕ РАЗРУШЕНИЕ
КЛЮЧЕВИДНЫЙ ВЫРЕЗ
РЕЖИМ НАГРУЖЕНИЯ
ГРАФИТ

description: В статье экспериментально исследована статическая прочность образцов изостатического графита с ключевидным разрезом при нагружении смешанного типа. Рассмотрены различные режимы нагружения при изменении угла наклона разреза относительно направления приложенной нагрузки. Для оценки статической прочности образцов использован критерий средней плотности энергии деформации в контрольном объеме материала у вершины разреза. Экспериментальные данные хорошо согласуются с результатами, полученными с помощью критерия плотности энергии деформации.In the present contribution, the static strength of isostatic graphite using keyhole notch specimens under mixed mode loading is investigated. An experimental program was performed and in total, 18 new experimental data are provided. In addition, different loading mode ratios are considered by varying the inclination angle of the notch with respect to the direction of the applied load. The criterion based on the averaged value of the strain energy density over a control volume at the notch edge is applied to assess the static strength of specimens. A sound agreement is found between experimental data and the results obtained from strain energy density criterion.
Unsupervised Deep Learning for AC Optimal Power Flow via Lagrangian Duality
Creators: name: Chen, Kejun
name: Bose, Shourya
name: Zhang, Yu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Non-convex AC optimal power flow (AC-OPF) is a fundamental optimization problem in power system analysis. The computational complexity of conventional solvers is typically high and not suitable for large-scale networks in real-time operation. Hence, deep learning based approaches have gained intensive attention to conduct the time-consuming training process offline. Supervised learning methods may yield a feasible AC-OPF solution with a small optimality gap. However, they often need conventional solvers to generate the training dataset. This paper proposes an end-to-end unsupervised learning based framework for AC-OPF. We develop a deep neural network to output a partial set of decision variables while the remaining variables are recovered by solving AC power flow equations. The fast decoupled power flow solver is adopted to further reduce the computational time. In addition, we propose using a modified augmented Lagrangian function as the training loss. The multipliers are adjusted dynamically based on the degree of constraint violation. Extensive numerical test results corroborate the advantages of our proposed approach over some existing methods.
Fractional order theory in a semiconductor medium photogenerated by a focused laser beam
Creators: name: Alzahrani Faris, S.
name: Abbas Ibrahim, A.
Publisher: name: Физическая мезомеханика
Year: 2018
Subjects: FRACTIONAL ORDER THEORY
PHOTOTHERMOELASTIC WAVES
EIGENVALUE APPROACH
LASER BEAM
LAPLACE TRANSFORM
ДРОБНОЕ ИСЧИСЛЕНИЕ
ФОТОТЕРМОУПРУГИЕ ВОЛНЫ
ПОДХОД НА ОСНОВЕ СОБСТВЕННЫХ ЗНАЧЕНИЙ
ЛАЗЕРНЫЙ ЛУЧ
ПРЕОБРАЗОВАНИЕ ЛАПЛАСА

description: С использованием дробного исчисления для описания тепловых, упругих и плазменных волн определены концентрация носителей заряда, смещения, температура и напряжения в материале полупроводника. Проведен анализ распространения тепловых, плазменных и упругих волн в полубесконечной среде при воздействии сфокусированного лазерного луча. Методом преобразования Лапласа найдено определяющее соотношение, которое решено аналитически на основе собственного значения в данной области. Исследование проведено для материала полупроводника со свойствами кремния. Результаты исследования показали, что дробный параметр порядка и время тепловой релаксации могут сильно влиять на изменение всех физических величин.In this paper, the fractional order theory has been applied for thermal, elastic and plasma waves to determine the carrier density, displacement, temperature and stress in a semiconductor medium. The thermal, elastic and plasma waves in a semi-infinite medium photogenerated by a focused laser beam were analyzed. The Laplace transformation is used to express the governing equation and solved analytically by applying eigenvalue approach methodology in that domain. A semiconducting material like as silicon was considered. According to the numerical results and graphics, the fractional order parameter and thermal relaxation time may play an important role in the behavior of all physical quantities.
Deep reinforcement learning based integrated guidance and control for a longitudinal missile system
Creators: name:  JEONGSU AHN
name:   JONGHO SHIN
name:   HYEONG-GEUN KIM
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: GUIDANCE LAW
NEURAL NETWORKS
DEEP REINFORCEMENT LEARNING
SOFT ACTOR-CRITIC

description: In this paper, we propose deep reinforcement learning (DRL)-based robust integrated guidance and control (JGC) law for longitudinal missile dynamics corrupted with noise. The longitudinal missile model is defined as the Markov decision process (MDP) and the JGC law is described as a policy network. The actor networks are trained using soft actor-critic (SAC) method and the output of the proposed method is determined as the normalized action. Then, the action multiplied by a scale factor becomes tail fin deflection command of the missile. Finally, numerical simulations are performed in learning and evaluation phases, and the results are analyzed and compared with those of sliding mode guidance control (SMGC)-based simulations.
Augmented Pursuit Guidance for Flight Trajectory Shaping
Creators: name:  MIN-JEA TAHK
name:   JONG-CHAN PARK
name:   BOSEOK KIM
name:   HEEKUN ROH
name:   CHANG-HUN LEE
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: MIDCOURSE GUIDANCE
PURSUIT GUIDANCE
REAL-TIME OPTIMAL GUIDANCE
TRAJECTORY OPTIMIZATION

description: This paper proposes a novel approach for trajectory shaping based on pursuit guidance. The relationship between the trajectory shape and the lead angle is derived for a class of trajectories expressed as polynomials of the downrange. Then pursuit guidance is augmented to control the lead angle by treating the lead-angle command as a bias signal in the lead-angle feedback loop. Approximations of the leadangle command are also suggested for simple implementation and the lead-angle tracking error and the miss distance are analysed for quadratic trajectory. Numerical examples are provided to show that the proposed method is useful for finding a suboptimal trajectory for terminal speed maximization.
Cold flow test of pintle injector for variable thrust combustion chamber with servo-valve method
Creators: name:  SEONGMIN JOO
name:   DOKEUN HWANG
name:   DONGHYUK KANG
name:   SEONGCHAN HEO
name:   SANGHOON HAN
name:   BYEONGYOUNG LEE
name:   WONJU JE
name:   JONGGYU KIM
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: COLD FLOW TEST
PINTLE INJECTOR
SERVO-VALVE
VARIABLE THRUST

description: From the Apollo lunar lander to SpaceX\'s recent Falcon 9 rocket, the pintle injector has proven its utility in a variable thrust combustion chamber. This paper presents the results of a cold flow test conducted on the pintle injector using a servo-valve method for a variable thrust combustion chamber. The pistonsleeve was designed and manufactured to move with a total stroke of 16.75 mm, employing hydraulic pressure from a servo-valve to actuate the double-acting cylinder located at the top/bottom of the pistonsleeve. The pintle core and piston-sleeve are fabricated from UNS S31603 and aluminium, respectively, while the head-part casing is composed of transparent polycarbonate to allow for visual observation of the piston-sleeve\'s movement. The servo-valve and power amplifier utilized were the 550-0610 model from STAR\'s (UK) and the SV-200 model from W.E.S.T.\'s (Germany), respectively. For the control and data acquisition system, the USB-6211 model from Ni\'s (USA), capable ofboth analog input and output, was employed. A custom in-house program, developed based on the commercial program LabVIEW, served as the software. Prior to the cold flow test, the functionality and operability of the servo-valve and piston-sleeve were verified by supplying a working fluid (kerosene) to the servo-valve and the double-acting cylinder at the head part. Additionally, a preliminary test was conducted to determine the pressurization conditions for each flow rate ( or each piston-sleeve stroke). The cold flow test was carried out using water in a miniature rocket engine test facility (mRETF) in Daejeon. After supplying water under the previously determined pressurization conditions starting from the fully open state of the pistonsleeve, the piston-sleeve was moved to positions corresponding to different flow rates, and the mass flow rate and pressure drop of the pintle and annulus ring orifice were measured. It was confirmed that the mass flow rates matched well with the fully open state (piston-sleeve position: 16.75 mm, total mass flow rate of water: 8.36 kg/s) under conditions of 20% to 90% opening position. Furthermore, it was observed that the pressure drop could be maintained over a wide flow rate range, particularly at lower flow rates.
Two dimensional magnetic correlation in the unconventional corrugated layered oxides (Ba,Sr)$_4$Mn$_3$O$_{10}$
Creators: name: Sannigrahi, J.
name: Chattopadhyay, S.
name: Bhattacharyya, A.
name: Giri, S.
name: Majumdar, S.
name: Venkateshwarlu, D.
name: Ganesan, V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Both Ba$_4$Mn$_3$O$_{10}$ and Sr$_4$Mn$_3$O$_{10}$ crystallize in an orthorhombic crystal structure consisting of corrugated layers containing Mn$_3$O$_{12}$ polydedra. The thermal variation of magnetic susceptibility of the compositions consists of a broad hump like feature indicating the presence of low dimensional magnetic correlation. We have systematically investigated the magnetic data of these compounds and found that the experimental results match quite well with the two dimensional Heisenberg model of spin-spin interaction. The two dimensional nature of the magnetic spin-spin interaction is supported by the low temperature heat capacity data of Ba$_4$Mn$_3$O$_{10}$. Interestingly, both the samples show dielectric anomaly near the magnetic ordering temperature indicating multiferroic behavior.
description: 7 pages, 4 figures
Narratives of brain injury and self-management after hospital discharge
Creators: name: Makela, Petra
Publisher: name: University of Westminster
Year: 2019

description: Specific processes for supporting self-management, as prioritised in contemporary Western healthcare policy, generally focus on biomedical aspects of managing a condition that is constructed as a separate entity from the rest of a person’s life. However, uncertainties in supporting self-management for long term conditions like traumatic brain injury (TBI) persist, including a mismatch between patient and professional contexts, and under-theorisation of the concepts ‘self’ and ‘agency’. To better grasp these issues, I gathered accounts of TBI-related experiences since hospital discharge, using a qualitative longitudinal design. I specifically relied on narrative interviews with ten dyads, consisting of one person who had recently sustained a TBI and their chosen ‘significant other’ person, at two time intervals. I undertook iterative narrative analyses, initially identifying discourses portrayed by participants and tensions, conflicts or emotional connections across our interactions. I drew upon insights from Michael Bamberg’s positioning analysis of the self in brief moments of talk-in-interaction, and Judith Butler’s work on performativity, to explore how people are bound by positions or create possibilities within socially instituted and maintained norms and expectations. The findings illustrate how the subject position ‘you are your brain injury’ brings an agentive gap. The self is made and remade through co-constructed narrative scaffolds that shift in collaborative storytelling, enabling the (re)claiming of a desired sense of self. This research offers insights into dynamics of consistency and change, rather than the assumed disruption to the self, when cognitive and communicative functions alter following TBI. In conclusion, I suggest implications for healthcare professionals’ conceptualisation of supported self-management interactions. Rather than ‘having’ individualistic agency that is bolstered by the clinical intervention, agency is understood as a relational co-construction, offering a shift away from positioning of the ‘clinician as expert’ and opening possibilities to reaffirm a sense of self.
Mid-Course Trajectory Optimization of VFDR Missiles via Pseudospectral Sequential Convex Programming
Creators: name:  BOSEOK KIM
name:   CHANG-HUN LEE
name:   MIN-JEA TAHK
name:   YONGKUN LEE
name:   HONG-GYE SUNG
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: MID-COURSE PHASE
TRAJECTORY OPTIMIZATION
VARIABLE-FLOW DUCTED ROCKET (VFDR)
SEQUENTIAL CONVEX PROGRAMMING

description: This paper presents amid-course trajectory optimization method for variable-flow ductedrocket(VFDR) missiles. The minimum-final time problem is defined by reflecting the dynamics and flight constraints. We representthe air mass flow rate as an analytic function of the state variables and construct an artificial neural network (ANN) for the thrust. The systemequationis established by selecting the angle-of-attack and air-to-fuel ratio as control variables. Then, pseudospectralsequentialconvex programming (PSCP) is utilized to solve the problem Numerical optimization results are provided to demonstrate the performance of the proposed method and examine the optimal trajectory pattern of the VFDR missiles.
An Exploration of Relocation Decision-making and Experience: Wellbeing and Chronic Stress Outcomes for Older Under- Occupying Homeowners
Creators: name: Lincoln, Gail
Publisher: name: University of Westminster
Year: 2020

description: This largely qualitative research used thematic analysis and some contextual quantitative data to supplement qualitative findings. It explored the decisions, experience and efficacy of 39 female homeowners, living alone in or near London, around downsizing to retirement housing. The focus was on wellbeing and chronic stress for participants who moved or did not. The timespan was: (1) ‘decision-making’ five months before the move, (2) just after moving, (3) ‘settling-in’ five months later. ‘Mover’ and ‘Non Mover’ cohorts were in two age groups 60-75; 76 and over. Structured interviews explored person-environment fit, quality of life, support networks and personal views and characteristics at Times (2) and (3) together with hair samples, for hair cortisol concentration (HCC) analysis of chronic stress. Depression, anxiety and stress measures were also taken retrospectively for Time (1). Two from each cohort had semi-structured interviews at Time (3). There were three ‘Overarching Themes’ and thirteen sub themes. Impediments and motivators to move were reported as either functional (practical) matters or ‘meaningful’ (emotional) matters, which had more influence for those disinclined to move. The inclination to move was dependent upon lifetime characteristics, beliefs, experience and self–efficacy, not age per se. Older Movers struggled with cognitive aspects and pressure to move from family, which was uncomfortably high in the research. Role diminishment within the community or family, and levels of autonomy, affected desire to move, the acceptance of help and time taken to settle-in. HCC results for chronic stress were interpreted using contextualised biographical material. This qualitative approach was essential in revealing individual delayed reactivity and different lengths/levels of response, depending on perception of ‘stressors’. Future research, policy and practice have been recommended, using richer than previous relocation research, for this growing social group.
Sonnenfleckenzeichnung Nr. 38.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 21.02.1987, 09:30, erstellt von Marco Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Numerical evaluation of T-stress under mixed mode loading through the use of coarse meshes
Creators: name: Acanfora Maria
name: Pasquale, Gallo
name: Javad Seyed, M.
name: Ayatollahi Majid, R.
name: Filippo, Berto
Publisher: name: Физическая мезомеханика
Year: 2018
Subjects: T-STRESS
DISPLACEMENT METHOD
COARSE MESH
MIXED MODE LOADING
Т-НАПРЯЖЕНИЕ
МЕТОД ПЕРЕМЕЩЕНИЙ
ГРУБАЯ СЕТКА
НАГРУЖЕНИЕ СМЕШАННОГО ТИПА

description: В настоящей работе исследуется применение грубых расчетных сеток для оценки Т-напряжения методом перемещений. Проведена серия расчетов методом конечных элементов с разным размером и точностью сетки. Методом конечных элементов смоделированы два режима нагружения: нагружение типа I и нагружение смешанного типа I/II. Нагружение типа I использовали для образцов с простым и двусторонним надрезом, нагружение смешанного типа для пластины с центральной трещиной. Проведено сравнение результатов анализа с результатами, полученными в рамках известного подхода на основе напряжений. Показана возможность оценки Т-напряжения методом перемещений при использовании грубых сеток. Однако использование грубых и очень грубых сеток требует учета ряда факторов.The present paper investigates the employment of coarse meshes in evaluating the T-stress with the displacement method. Several finite element analyses have been carried out with different mesh refinements and accuracies. Mode I and mixed mode I/II loadings have been considered in finite element analyses. Under mode I loading, single and double edge notched geometries have been considered, while plate with central crack has been considerd for mixed mode loading condition. The analyses are compared with the results by the well-nown stress based approach, and showed that the displacement method permits the evaluation of the T-stress with the employment of coarse meshes. By the way, several precautions must be taken when dealing with coarse and very coarse meshes.
Sonnenfleckenzeichnung Nr. 198.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 19.08.1987, 07:30, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 278.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.12.1987, 11:00, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 7.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 07.01.1987, 09:15, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 152.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 03.07.1987, 11:30, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
A mode i crack problem for a thermoelastic fibre-reinforced anisotropic material using finite element method
Creators: name: Abbas Ibrahim, A.
name: Razavi Seyed, M.J.
Publisher: name: Физическая мезомеханика
Year: 2018
Subjects: FINITE ELEMENT METHOD
FIBER-REINFORCED MATERIAL
MODE I CRACK
МЕТОД КОНЕЧНЫХ ЭЛЕМЕНТОВ
УПРОЧНЕННЫЙ ВОЛОКНОМ МАТЕРИАЛ
ТРЕЩИНА ОТРЫВА

description: В рамках теории обобщенной термоупругости с одним временем релаксации рассмотрен термоупругий упрочненный волокном анизотропный материал, в объеме которого присутствует конечная линейная трещина. Границы трещины определяются заданной температурой и распределением напряжений. Методом конечных элементов получены численные решения для компонент смещений, температуры и напряжений. Проведено сравнение результатов для неупрочненного и упрочненного материала.In this article, the theory of generalized thermoelasticity with one relaxation time is used to investigate the thermoelastic fiber-reinforced anisotropic material with a finite linear crack. The crack boundary is due to a prescribed temperature and stress distribution. By using the finite element method, the numerical solutions of the components of displacement, temperature and the stress components have been obtained. Comparisons of the results in the absence and presence of reinforcement have been presented.
Sonnenfleckenzeichnung Nr. 164.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 15.07.1987, 09:00, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Tilt Angle Control Planning for eVTOL using Trim Analysis
Creators: name:  JEONGSEOK HYUN
name:   MINSEOK JANG
name:   TUAN ANH NGUYEN
name:   JAE-WOO LEE
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: TRANSITION
EVTOL
TRIM ANALYSIS
TILT CORRIDOR

description: This study proposed a tilt angle control planning methodology for e VTOL tiltrotor vehicle strictly considering the requirements of UAM flight operations in a transition flight. Previous studies often disregard human-oriented comfortability in transition and consider pitching behaviors as usual UAV s. Our approach adopts trim analysis for the generation of a tilt angle control plan in the elaboration of the angle of attack schedule upon flight speed. As a result, the study helps to generate the tilt angle control plan by the tile angle. This work contributes to the development of UAM vehicle control and operations for passenger comfortability and safety.