Academic literature on the topic 'Masse accordate'
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Journal articles on the topic "Masse accordate"
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Xiang, Wei, Zihui Huang, Chenhu Tang, Bo Shen, Qun Yu, Xiaohong Niu, and Fanrong Meng. "Use of ultrasound combined with magnetic resonance imaging for diagnosis of breast masses and fibroids." Journal of International Medical Research 47, no. 7 (June 2, 2019): 3070–78. http://dx.doi.org/10.1177/0300060519848611.
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Objective To investigate the clinical value of ultrasound plus magnetic resonance imaging (MRI) for the diagnosis of breast masses and fibroids. Methods Clinical data for 357 patients with breast masses diagnosed at our hospital were analyzed retrospectively. The diagnostic performances were compared between 243 patients who underwent routine ultrasound examinations (control group) and 114 patients who underwent routine ultrasound plus MRI (test group). Results The overall accordance rates of routine ultrasound and routine ultrasound plus MRI for the diagnosis of breast masses, based on postoperative pathological diagnoses, were 70.78% (172/243) and 90.35% (103/114). The addition of MRI significantly improved the overall diagnostic performance of routine ultrasound for breast masses. The diagnostic accordance rate of routine ultrasound for the diagnosis of breast fibroids (fibroadenomas) was 74.12% (63/85 cases) compared with 93.94% (31/33 cases) for routine ultrasound plus MRI. The diagnostic performance of routine ultrasound plus MRI was therefore also significantly higher than routine ultrasound alone for diagnosing breast fibroids. Conclusions Routine ultrasound plus MRI can greatly improve the diagnostic accordance rates for breast masses and fibroadenomas.
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Barros, Nara Vanessa dos Anjos, Joana Carvalho Serra, Rosielle Alves de Moura, Paulo Víctor de Lima Sousa, and Regina Márcia Soares Cavalcante. "Desenvolvimento de Massa de Pizza Enriquecida com Hibisco." Ensaios e Ciência C Biológicas Agrárias e da Saúde 24, no. 5-esp. (February 18, 2021): 504–10. http://dx.doi.org/10.17921/1415-6938.2020v24n5-esp.p504-510.
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Atualmente, busca-se constantemente o desenvolvimento de novos produtos para atender as necessidades dos consumidores, sendo a utilização do hibisco (Hibiscus sabidariffa L.) na produção alimentícia uma forma simples e econômica de agregar sabor aos produtos e beneficiar a saúde de quem os consome. O presente trabalho teve como objetivo desenvolver uma massa de pizza enriquecida com farinha de folhas de hibisco (FFH). Adicionou-se diferentes concentrações da FFH às massas de pizza, as quais foram submetidas às análises sensoriais e físico-químicas. Não houve diferença estatística significativa entre a formulação I (massa de pizza enriquecida com 2% de FFH) e a formulação II (massa de pizza enriquecida com 4% de FFH) em relação à aceitação global. Para as análises físico-químicas, as formulações obtiveram teores baixos de umidade (F1 - 18,07 ± 1,07; F2 - 19,3 ± 0,31) e um bom conteúdo de cinzas (F1 - 1,45 ± 0,06; F2 - 1,57 ± 0,10). Para o pH e acidez, os resultados obtidos estão de acordo com o preconizado pela legislação vigente, com resultados que variaram de 5,0 a 6,0 para o pH, e de 1,7 a 2,8, para a acidez total titulável. Constatou-se que ambas amostras obtiveram boa aceitação por parte dos provadores, assim como uma intenção de compra satisfatória. Em relação às análises físico-químicas, verificou-se que os produtos desenvolvidos obtiveram características semelhantes a outras massas enriquecidas, estando de acordo com o preconizado nas legislações para este produto.
Palavras-chave: Desenvolvimento de Produtos. Hibiscus sabidariffa L. Produto de Panificação.
Abstract
Currently, there is a constant search for the development of new products to meet the consumer’s needs, and the use of hibiscus (Hibiscus sabidariffa L.) in food production is a simple and economical way to add flavor to products and benefit the health of those who consume them. The present work had as objective to develop pizza dough enriched with hibiscus leaf flour (HLF). Different concentrations of HLF were added to the pizza masses, which were submitted to the sensorial and physicochemical analyzes. There was no statistically significant difference between formulation I (2% HLF enriched pizza mass) and formulation II (4% HLF enriched pizza mass) in relation to the overall acceptance. For the physicochemical analysis, the formulations obtained low levels of humidity (F1 - 18.07 ± 1.07; F2 - 19.3 ± 0.31) and a good ash content (F1 - 1.45 ± 0, 06; F2 - 1.57 ± 0.10). For pH and acidity, the results obtained are in accordance with the recommendations of the current legislation, with results ranging from 5.0 to 6.0 for pH, and from 1.7 to 2.8, for total titratable acidity. It was found that both samples obtained good acceptance by the tasters, as well as a satisfactory purchase intention. Regarding the physical-chemical analysis, it was found that the products developed obtained characteristics similar to other enriched masses, being in accordance with the recommendations in the legislation for this product.
Keywords: Product Development. Hibiscus Sabidariffa L. Bakery Product.
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Ibad, Syahrul, and Musdalifah Musdalifah. "Partai Politik: Tinjauan Strategi Dalam Meraih Dukungan Massa." Publik (Jurnal Ilmu Administrasi) 8, no. 2 (February 24, 2020): 89. http://dx.doi.org/10.31314/pjia.8.2.89-100.2019.
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This study discusses political parties reviewing strategies in gaining mass support, the strategy carried out by political parties is to achieve predetermined goals which in this case are referred to as the vision and mission of political parties using techniques, tricks, methods and implementation of tasks by utilizing party structure, so that the work program is in accordance with the wishes of the community. Meanwhile, to uncover the strategy of political parties in gaining mass support, a library research method or approach is used. Literature study or literature can be interpreted as a series of activities related to library data collection methods, reading and recording and processing research materials. Research results show that strategy of political parties in gaining the support of the masses is always trying to fix the party from the party's internal and external parties, so that the party can provide a better change for the community through political party programs and through power struggles in general elections.Penelitian ini membahas tentang partai politik tinjauan strategi dalam meraih dukungan massa, strategi yang dilakukan partai politik ialah untuk mencapai tujuan yang sudah ditentukan sebelumnya yang dalam hal ini disebut sebagai dengan visi dan misi partai politik dengan menggunakan teknik, trik, cara maupun pelaksanaan tugas dengan memamfaatkan struktur partai, sehingga program kerja sesuai dengan keinginan masyarakat. Sedangkan untuk mengungkap strategi partai politik dalam meraih dukungan massa digunakan metode atau pendekatan kepustakaan, Studi pustaka atau kepustakaan dapat diartikan sebagai serangkaian kegiatan yang berkenaan dengan metode pengumpulan data pustaka, membaca dan mencatat serta mengolah bahan penelitian. Hasil Penelitian menunjukkan bahwa strategi partai politik dalam meraih dukungan massa adalah selalu berusaha membenahi partai dari internal partai maupun ekternal partai, sehingga partai bisa memberikan perubahan yang lebih baik bagi masyarakat melalui program partai politik maupun melalui perebutan kekuasaan dalam pemilihan umum.
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Taura, Joel John, and Oni Leke. "DERIVATION OF THE DYNAMICAL EQUATIONS OF MOTION OF THE R3BP WITH VARIABLE MASSES AND DISK." FUDMA JOURNAL OF SCIENCES 6, no. 4 (August 23, 2022): 125–33. http://dx.doi.org/10.33003/fjs-2022-0604-1025.
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This paper explores the dynamical equations of the restricted three-body problem with variable masses of the primaries which are enclosed by a disk, when the masses of the primary and the disk vary with time in accordance with the unified Mestschersky law and motion of the primaries is determined by the Gylden-Mestschersky equation. It is seen that the equations of motion differ from those of the restricted three-body problem with variable masses due to the disk mass
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Ritonga, Chacha Annisa. "Peran Media Massa Dalam Komikasi Politik." Jurnal Politik Pemerintahan, Majalah Ilmiah Program Studi Ilmu Politik 2, no. 1 (January 31, 2017): 101–13. http://dx.doi.org/10.55745/jpp.v2i1.17.
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The existence of mass media in the context of political communication has an important role. It.is in accordance with the process of the authoritative political tranformation to the reformation era which undoubtedly the expression freedom to be a basic of the formation of democratic citizen life. Mass media has an important role in delivering tje political message to the public significantly, because the mass media has some advantages such as mass media has a broad range to the public and directly also immediately affects to the message receiver. In addition, the mass media indeed cannot determine what to think, but affect what to think about. By choosing certain news and ignore others, media forms our world image as the media presents. Therefore, it is reasonable if the mass media involvement in the developing of certain political and democracy system is very crucial.
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Dietrich, Joan M., and R. B. Payne. "An Experimental Test of Inhibition and Consolidation Theories of Spaced Practice Effects." Perceptual and Motor Skills 63, no. 3 (December 1986): 1051–57. http://dx.doi.org/10.2466/pms.1986.63.3.1051.
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The relative merits of inhibition and consolidation theories of spaced-practice effects were examined in terms of the fidelity with which the theories were able to forecast the decremental consequences of massed practice following differentially spaced practice on a rotary pursuit task. In accordance with inhibition theory and contrary to consolidation theory, the longer the intertrial interval during the spaced-practice sequence, the more rapidly performance declined during the massed-practice sequence. Additional evidence supporting inhibition theory and negating consolidation theory was reviewed.
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Kaptay, G. "On the atomic masses (weights?) Of the elements." Journal of Mining and Metallurgy, Section B: Metallurgy 48, no. 1 (2012): 153–59. http://dx.doi.org/10.2298/jmmb111024014k.
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Atomic masses (weights?) is an essential information for mining and metallurgy. The paper discusses four subjects around this problem. First, the classification of all the elements is suggested into 4 classes, based on their isotope features, determining the accuracy of their known atomic masses. As part of that, the class of elements is discussed with uncertain atomic weights in accordance with the 2009 IUPAC recommendations. A better (easier to use) format of atomic weights is presented for this class of elements. Third, it is found not informative to leave empty spaces instead of approximate atomic weights for elements with unstable isotopes. Fourth, the term atomic weight vs the term atomic mass is discussed shortly, in agreement with the SI system of units and in contrary to the questionable IUPAC convection.
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Idris, Muhammad Ahnu. "UPAYA MENCIPATAKAN MEDIA MASSA DAKWAH (Sebuah Kajian Teoantroposentris)." Ulumuna: Jurnal Studi Keislaman 4, no. 2 (December 10, 2018): 134–50. http://dx.doi.org/10.36420/ju.v4i2.3499.
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This paper discusses the inculcation of religious values in the mass media, so that the news is preaching and can be an intermediary to build a society that is in accordance with the guidance of Islamic law. With qualitative analysis, the results of this paper are elaborated in the form of a translation based on existing literature and data based on the Theoantropocentric Theory. Media actors as a profession have taken shortcuts by referring to the principle of benefits prioritizing the principle of benefits in their coverage and reporting, which is at the same time paradoxical to the professional ethics they carry. Compounded by the lack of respect for the principle of presumption of innocence in the name of the public interest in obtaining information, will increasingly make mass media and media actors as dominant individuals in reconstructing and manipulating social reality.
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Roupas, Zacharias, and Demosthenes Kazanas. "Binary black hole growth by gas accretion in stellar clusters." Astronomy & Astrophysics 621 (January 2019): L1. http://dx.doi.org/10.1051/0004-6361/201834609.
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We show that binaries of stellar-mass black holes formed inside a young protoglobular cluster, can grow rapidly inside the cluster’s core by accretion of the intracluster gas, before the gas may be depleted from the core. A black hole with mass of the order of eight solar masses can grow to values of the order of thirty five solar masses in accordance with recent gravitational waves signals observed by LIGO. Due to the black hole mass increase, a binary may also harden. The growth of binary black holes in a dense protoglobular cluster through mass accretion indicates a potentially important formation and hardening channel.
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Umiyati, Annisa, Bagus Surya Pratama, Nur Aini, and Widya Ayu Kesumastuti. "AFIKS DERIVASIONAL BER- PADA MEDIA MASSA INDONESIA." Hasta Wiyata 4, no. 2 (July 1, 2021): 81–105. http://dx.doi.org/10.21776/ub.hastawiyata.2021.004.02.01.
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News is part of the mass media that is easily accessible to all people. News has the characteristics of language is short, concise and objective. The use of language in writing news must pay attention to the writing of word structures, word formation in accordance with PUEBI. One of the word formation that occurs is the result of affixation process. One of the productive affixes in Indonesian is the prefix ber-. This study discusses the derivational affixes contained in mass media coverage in Indonesia. Data sources came from national, regional, and local online mass media during the period of September 2020. Data were obtained using observation methods and note-taking techniques. Data were analyzed using the split method with direct element sharing techniques. The use of the affix on the Indonesian mass media in the form of Ber+N= V has the meaning (1) in the state; (2) obtain, produce; (3) have; and (4) reflexive. Whereas Ber+A= V means 'in a state'. Ber+Adv.= V means 'in a state'. Ber+N= Num. has the meaning of 'collection / collective', and Ber+bound morpheme= V has the meaning (1) 'in a state'; (2) 'have'. Variations in the use of affixes are mostly carried out in the national media and the affixes of ber- which are not yet available in the Kridalaksana book are Ber+Adv.= V, Ber+N= Num. , and Ber+bound morpheme= V.
Dissertations / Theses on the topic "Masse accordate"
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Poh'siè, Guillaume Hervè. "ANALISI DELLA DUTTILITÀ DI EDIFICI MULTIPIANO IN LEGNO E MITIGAZIONE DELLA RISPOSTA SISMICA MEDIANTE L'USO DI MASSE ACCORDATE." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11110.
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2013/2014Le tecniche di analisi numeriche in campo non lineare delle strutture in legno sulla base delle prove sperimentali su singoli componenti, elementi strutturali e interi edifici si sono molto evolute nell'ultimo decennio. Numerosi ricercatori si sono dedicati a sviluppare modelli per simulare il comportamento ciclico in campo non lineare (chiodi, hold down, viti e squadrette a taglio) e i risultati di numerosi modelli numerici sono stati confrontati con i risultati sperimentali in termini di forza massima, degrado di rigidezza ,resistenza, spostamento massimo e ultimo, energia dissipata. Questo lavoro di tesi segue la linea della progettazione basata sul Performance Based Design. Nella prima parte della stessa viene approfondita l’analisi statica non lineare per determinare la curva di capacità degli elementi e dei sistemi strutturali a telaio leggero e X-Lam. Nella seconda parte si analizza il problema del miglioramento delle performance delle strutture in X-Lam mediante l'uso delle masse accordate (Tuned Mass Dampers). Queste vengono progettate con tecniche di ottimizzazione, allo scopo di ridurre al meglio le accelerazioni massime che in genere accompagnano questa tipologia strutturale.
XXVII Ciclo
1979
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Allani, Anissa. "Conception et optimisation d'amortisseurs à masse accordée pour les structures du génie civil." Thesis, Paris Est, 2015. http://www.theses.fr/2015PESC1137/document.
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Le travail de thèse s’appuie sur un recueil exhaustif des travaux effectués dans le domaine du contrôle des vibrations auxquels sont soumis les ouvrages génie civil. Une contribution innovante et originale est apportée et permet de classifier, de généraliser et d’optimiser certains critères dans le but d’assurer une conception optimale de divers dispositifs d’atténuation des vibrations, et ce, selon leur application. L’un des objectifs de la thèse a donc consisté à traiter ces critères de manière originale. Après avoir résolu le problème dit « direct » s’appuyant sur la modélisation des systèmes dotés d’un ou de plusieurs AMAs, nous nous sommes intéressés au problème dit « indirect » en envisageant divers critères d’optimisation. Ainsi, plusieurs critères d’optimisation des paramètres mécaniques de plusieurs AMAs appliqués à un système principal comportant 1 ou plusieurs degrés de liberté peuvent être utilisés. L’excitation du système principal est envisagée de deux manières, soit à sa base (en vue d’une application à la sismique), soit au niveau de la structure (en vue d’une application aux effets du vent).Des simulations numériques sont réalisées dans le but d’étudier la performance de chaque modèle optimisé en se fondant sur des approches fréquentielles et temporelles. La robustesse de chaque critère d’optimisation face aux incertitudes liées au changement des paramètres physiques de la structure principale a été examinée. Nous avons également étudié la sensibilité des critères par rapport aux incertitudes des paramètres optimisés des AMAs. La conception et l’optimisation de p AMAs placés en parallèle pour un système principal à Nddl, a constitué une nouvelle contribution originale dans le cadre de cette thèse. Dans ce contexte, lors d’une sollicitation sismique, nous estimons la contribution de chaque mode dans la structure principale et nous conservons seulement les modes de vibrations qui ont un rapport de masses modales cumulées supérieur à 90%. Le choix du critère d’optimisation s’appuie seulement sur les étages les plus sensibles aux modes conservés et permet ainsi de tenir compte des modes élevés de la structure principale. Dans le but de limiter les dommages subis par les constructions du génie civil lors de sollicitations sismiques, nous cherchons à évaluer l’efficacité des AMAs afin d’atténuer les réponses temporelles sismiques. Ainsi une étude comparative est réalisée en appliquant quatre séismes réels sur les modèles optimisés. Afin d’illustrer les résultats obtenus, des tests de caractérisation d’un AMA utilisant un amortissement par courants de Foucault et un ajustement de la rigidité, ont été menés. Ils ont permis d’obtenir une validation expérimentale du modèle et du critère d’optimisation adoptéThe architectural demand and the desire to reduce costs permit the construction of light structures with innovating shapes. The great flexibility of these structures makes them increasingly sensitive to the external dynamic loads such as traffic, wind and earthquakes. Vibration control techniques allow to construct modern buildings increasingly slender, and, whether they are economic or architecturally audacious. Instead of modifying the geometrical and mechanical characteristics of a structure, vibration control consists in producing reaction forces which are opposed to the negative effects of the external excitations when they appear. This technological advance has the great advantage to not influencing planners and architects’ work and it provides them with additional creative options in both geometrical and mechanical characteristics of buildings. We restrict our focus to passive vibration control. Among available passive vibration absorber systems, Tuned Mass Dampers (TMDs) were selected for their simplicity and reliability. A TMD consists of a mass, a dashpot, and a spring, and is commonly attached to a vibrating primary system to suppress undesirable vibrations. The performance of TMDs is strongly affected by the adjustment of their parameters. The problem is the optimization of the mechanical parameters of TMD and their location in order to attenuate vibrations of the main structure. This thesis is based on understanding the dynamic characteristics of TMD. It aims to make an innovative and original contribution to classify, generalize and optimize some criteria in order to ensure an optimal design of TMDs, depending on their application. Our work consisted to treat these criteria in an original way. After solving the direct problem based on the modelling of systems with one or several TMD, we tackled the indirect problem by considering various optimization criteria. Thus, several optimization criteria of the mechanical parameters of TMDs applied to a main system (single (SDOF) or multiple degrees of freedom (MDOF)) are used. The excitation of the main system can be done in two different ways; either on the base (for seismic application) or on the structure (for wind effects).Numerical simulations based on a time and frequency approach are used to examine the performance of each optimized model. The robustness of each optimization criterion is assessed by taken into account the uncertainties related to the change of the physical parameters of the main structure. Such problems can be discussed by considering sensitivity analysis for criteria under uncertainty of the optimum TMD parameters. A new and original contribution of this thesis is the design and optimization of multiple TMDs in parallel with a MDOF main structure. In this context, during seismic loads, modes in the main structure with relatively high effective masses can be readily excited by base excitation. Afterwards, optimization criterion can be developed based on the most sensitive storeys to vibration modes which are a cumulative modal effective mass fraction exceeding 90%. To protect structures under earthquake loads, we seek to assess the effectiveness of TMDs in mitigating the response of structure under different real earthquakes. A comparative study is then achieved with four real earthquakes applied on systems with TMD optimized parameters. To illustrate the results obtained, characterization tests are conducted on a TMD with damping by eddy currents effect and adjustable stiffness. They allow the validation of the model and optimization criterion adopted
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Valgimigli, Francesca. "Studio della risposta dinamica di un Tuned Mass Damper (TMD) con sistema di amplificazione inerziale." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
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Il presente elaborato affronta lo studio dinamico di un dispositivo a massa accordata (TMD) innovativo che, accoppiato ad una struttura, migliora l’attenuazione delle vibrazioni rispetto ad un TMD classico. Questo dispositivo sfrutta l’amplificazione inerziale (IAM). È costituito da un oscillatore semplice, accoppiato a due masse laterali. Se progettato correttamente, le masse laterali sono capaci di amplificare l’inerzia effettiva del risonatore. In particolare, nel capitolo 1 verranno riassunte le nozioni fondamentali dell’isolamento sismico e della dissipazione. Si introdurrà lo smorzatore sismico a massa accordata con amplificazione della massa (IAM). Nel capitolo 2 verrà descritta la geometria e l’inerzia del dispositivo e verrà condotto uno studio parametrico per determinare il rapporto tra le masse in gioco e l’angolo di inclinazione delle masse laterali rispetto alla verticale che forniscono una maggiore amplificazione della massa del TMD. Verrà poi studiata la risposta dinamica del dispositivo senza e con smorzamento soggetto a spostamento alla base armonico, in termini di spostamento assoluto e relativo. Per validare i risultati ottenuti, un sistema IAM sarà modellato su Straus7. Nel capitolo 3 si applicherà lo smorzatore ad una struttura ad un grado di libertà. Si considererà la struttura soggetta a forzante armonica e si valuterà la risposta in termini di spostamento assoluto della struttura e dello smorzatore al variare dei parametri inerziali e geometrici di questo, senza e con smorzamento. Al fine di ridurre lo spostamento massimo di struttura e dispositivo, verrà condotto lo studio del design ottimale. Tale sistema sarà verificato con Strau7. Nel capitolo 4 si applicherà lo smorzatore ad un punto fisso della medesima struttura. Verrà studiato il design ottimale per il sistema struttura e dispositivo IAM-TMD. Tale sistema sarà verificato con Strau7. Infine, nel capitolo 5 saranno riportate le conclusioni degli studi condotti nei capitoli precedenti.
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Berzanti, Alessandro. "Meccanismi ad amplificazione inerziale per la riduzione delle vibrazioni strutturali." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
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L’uso degli smorzatori a massa accordata è ancora una pratica limitata nell’ingegneria civile, ma presenta degli innegabili vantaggi per la riduzione degli spostamenti all’atto sia di eventi sismici che per azioni dinamiche di minore entità; nel presente lavoro è stato studiato il comportamento di un sistema telaio-smorzatore, focalizzando l’attenzione sull’influenza che il tipo di oscillazione della massa aggiunta può avere rispetto al modello classico di mass damper; a questo proposito è stata applicata la teoria dei meccanismi ad amplificazione inerziale (IAM), valutando l’effetto dinamico sulla struttura e stimandone i benefici pratici e teorici. A livello di procedura, in riferimento ad un classico smorzatore TMD accordato secondo il metodo di Den Hartog, è stato ricavato un oscillatore IAM equivalente, ed al variare delle sue caratteristiche geometriche e di calibrazione in massa è stata valutata la risposta per eccitazione armonica alla base relativa alla frequenza di risonanza della struttura principale. Da quanto emerge dai risultati del calcolo agli elementi finiti, esiste effettivamente una distribuzione di masse che ottimizza il comportamento dinamico del dispositivo, questo in termini di una significativa riduzione della massa utile contro modesti incrementi di rigidezza rispetto al classico TMD. Questo è stato valutato sia per un sistema singolo che per sistemi accoppiati in parallelo, ed i risultati suggeriscono l’esistenza di una correlazione di progetto per i coefficienti di distribuzione delle varie masse oscillanti, questo in funzione della configurazione iniziale dell’oscillatore studiato e del rapporto in massa con la struttura principale. In definitiva, questo studio mostra come lo stesso effetto dinamico raggiunto dai classici smorzatori sia ottenibile impiegando masse minori, il che rappresenta un vantaggio sia pratico che economico.
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Blackwell, Breyanna Marie. ""To Share or Not to Share:" A Study of an Individual's Self-Representation on Instagram in Accordance with Impression Management Theory." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etd/3257.
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This research study examined what the motivations and consequences of self-disclosure on Instagram were as well as its correlation with Impression Management Theory. The research used a 37 question survey which was distributed on social media, through the Department of Media and Communication at ETSU as well as a public speaking class. There were 232 participants in this study who were 18 or older and used Instagram. Research found that individuals’ self disclose using levels of relationship management, showing off, information sharing and habitual behavior. Future research includes the opportunity to incorporate a sample of participants across different cultures to analyze the differences in self-disclosure styles on Instagram.
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Mrabet, Elyes. "Optimisation de la fiabilité des structures contrôlées." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEC011/document.
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Le présent travail traite l’optimisation des paramètres des amortisseurs à masses accordées (AMA) accrochés sur des structures, linéaires. Les AMAs sont des dispositifs de contrôle passif utilisés pour atténuer les vibrations induites par des chargements dynamiques (en particulier stochastiques) appliqués sur des structures. L’efficacité de tels dispositifs est étroitement liée aux caractéristiques dynamiques qu’on doit imposer à ces systèmes. Dans ce cadre, plusieurs stratégies d’optimisation peuvent être utilisées dans des contextes déterministes et non déterministes, où les paramètres de la structure à contrôler sont incertains. Parmi les différentes approches qu’on peut trouver dans la littérature, l’optimisation structurale stochastique (OSS) et l’optimisation basée sur la fiabilité (OBF) étaient particulièrement traitées dans le présent travail.Dans la première partie de ce travail, en plus de la nature stochastique des chargements extérieurs appliqués à la structure linéaire à contrôler, la présence de paramètres structuraux de type incertains mais bornés (IMB) est prise en considération et les bornes optimales des paramètres AMA ont été calculées. Le calcul de ces bornes a été fait en utilisant une technique basée sur un développement de Taylor suivi d’une extension aux intervalles. La technique, permettant l’obtention d’une approximation des bornes optimales, a été appliquée dans les cas d’un système à un degré de liberté (1DDL) et un autre à plusieurs degrés de libertés (nDDL). Les résultats obtenus ont montrés que la technique utilisée était bien adaptée pour la stratégie OSS et elle l’est moins pour l’approche OBF.Comme suite logique aux résultats de la première partie, la seconde partie de la présente dissertation est consacrée à la présentation de deux méthodes permettant l’obtention des bornes exactes et des bornes approximées des paramètres optimaux de l’AMA et ce, en présence de paramètres structuraux de type IMB. La première méthode est celle de la boucle d’optimisation continue imbriquée, la seconde est celle des extensions aux intervalles basées sur la monotonie. Les méthodes présentées, qui ont été appliquées avec l’approche OBF, sont valables pour n’importe quel problème d’optimisation faisant intervenir des paramètres de type IMB. Mis à part le calcul de bornes optimisées du dispositif AMA, la question de la robustesse, vis-à-vis des incertitudes structurales, a été également traitée et il a été prouvé que la solution optimale correspondante au contexte déterministe était la plus robuste.L’introduction d’une nouvelle stratégie OBF des paramètres AMA a fait l’objet de la troisième partie de cette dissertation. En effet, un problème OBF est toujours relié à un mode de défaillance caractérisé par le franchissement d’une certaine réponse, de la structure à contrôler, d’un certain seuil limite pendant une certaine durée de temps. Le nouveau mode de défaillance, correspondant à la nouvelle stratégie OBF, consiste à considérer qu’une défaillance ait lieu lorsque la puissance dissipée au niveau de la structure à contrôler, pendant une période de temps, excède une certaine valeur. Faisant intervenir l’approche par franchissement ainsi que la formule de Rice, la nouvelle stratégie a été appliquée dans le cas d’un système 1DDL et l’expression exacte de la probabilité de défaillance est calculée. En se basant sur une approximation mettant en œuvre la technique du minimum d’entropie croisé, la nouvelle stratégie a été, également, appliquée dans le cas d’un système à nDDL et les résultats obtenus ont montrés la supériorité de cette stratégie par rapports à deux autres tirées de la bibliographieThe present work deals with the parameters optimization of tuned mass dampers (TMD) used in the control of vibrating linear structures under stochastic loadings. The performance of the TMD device is deeply affected by its parameters that should be carefully chosen. In this context, several optimization strategies can be found in the literature and among them the stochastic structural optimization (SSO) and the reliability based optimization (RBO) are particularly addressed in this dissertation.The first part of this work in dedicated to the calculation of the optimal bounds solutions of the TMD parameters in presence of uncertain but bounded (UBB) structural parameters. The bounds of the optimal TMD parameters are obtained using an approximation technique based on Taylor expansion followed by interval extension. The numerical investigations applied with one degree of freedom (1DOF) and with multi-degree of freedom (multi-DOF) systems showed that the studied technique is suitable for the SSO strategy and that it’s less appropriate for the RBO strategy.As immediate consequence of the obtained results in the first part of this work, in the second part a method, called the continuous-optimization nested loop method (CONLM), providing the exact range of the optimal TMD parameters is presented and validated. The numerical studies demonstrated that the CONLM is time consuming and to overcome this disadvantage, a second method is also presented. The second method is called the monotonicity based extension method (MBEM) with box splitting. Both methods have been applied in the context of the RBO strategy with 1DOF and multi-DOF systems. The issue of effectiveness and robustness of the presented optimum bounds of the TMD parameters is also addressed and it has been demonstrated that the optimum solution corresponding to the deterministic context (deterministic structural parameters) provide good effectiveness and robustness.Another aspect of RBO approach is dealt in the third part of the present work. Indeed, a new RBO strategy of TMD parameters based on energetic criterion is presented and validated. The new RBO approach is linked to a new failure mode characterized by the exceedance of the power dissipated into the controlled structure over a certain threshold during some interval time. Based on the outcrossing approach and the Rice’s formula, the new strategy is firstly applied to 1DOF system and exact expression of the failure probability is calculated. After that, a multi-DOF system is considered and the minimum cross entropy method has been used providing an approximation to the failure probability and then the optimization is carried out. The numerical investigations showed the superiority of the presented strategy when compared with other from the literature
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Zhou, Shaoyi. "Advances in passive and active damping techniques." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI066.
Full textAbstract:
Les systèmes mécaniques (e.g. structures flexibles) sont généralement peu amortis, et par conséquent des vibrations de fortes amplitudes peuvent apparaitre. Il apparait nécessaire de développer des stratégies de contrôle vibratoire pour atténuer ces vibrations mécaniques. Cette thèse a pour objectif de développer plusieurs techniques d'amortissement de vibration passives ou actives. La première partie porte sur l'utilisation d'un “inerter” pour améliorer les performances de contrôle vibratoire de deux dispositifs existants, l'amortisseur à masse accordée (TMD) et deux TMDs placés en série (SDTMD). Dans le cas avec un TMD, on considère un système mécanique avec incertitudes ainsi que son optimisation H-infinity (worst-case optimization) en adoptant une approche purement algébrique. Dans le cas de SDTMD, on vise à contrôler la vibration d'un système déterministe. Son optimisation H-infinity s'effectue ici en utilisant une version étendue de la théorie de points fixes (FPT). Dans une seconde partie, on cherche à améliorer les performances de ce type de dispositif en positionnant un élément linéaire de raideur négative entre la base et la masse accordée. Deux cas d'étude sont menés: le TMD seul et celui basé sur l'inerter (IDVA). Les deux dispositifs ont une configuration non-traditionnelle, dont la masse accordée est liée à la base par l'intermédiaire d'un amortisseur visqueux ou un réseau mécanique basé sur l'inerter. La réalisation de ces dispositifs non-traditionnelles avec ou sans raideur négative et leurs shunts piézoélectriques sont étudiés et une analogie électromécanique est établie. Cette analogie permet d'étendre l'applicabilité des amortisseurs mécaniques et de faciliter les réglages. Dans la dernière partie, deux techniques d'amortissement actif et semi-actif sont développées. La première stratégie concerne une loi de contrôle hybride applicable au TMD et à l'IDVA. Le contrôleur proposé est composé d'un seul ou plusieurs compensateurs identiques, qui est caractérisé par un pôle à l'origine et deux zéros coïncidents réels. Les expressions analytiques sont développées dans les deux cas. La seconde technique de contrôle s'appuie sur l'atténuation de vibration par shunt électromagnétique (EMSD), pour laquelle aucun capteur est requis. Une inductance négative (NI) est employée dans les shunts électromagnétiques afin d'améliorer l'amortissement. Trois architectures possibles de NI dans un EMSD sont évaluées à travers le facteur de couplage électromécanique, qui quantifie l'efficacité de conversion énergétique entre les domaines mécanique et électrique. Finalement, six shunts électromagnétiques utilisant des NIs sont optimisés et analysésMechanical systems (e.g. flexible structures) are usually lightly damped so that they vibrate severally in response to dynamic loads. Therefore, vibration control strategies should be adopted in order to reduce the undesired vibration of mechanical systems. The objective of this thesis is to develop multiple vibration control techniques, which are either passive or active. The first part focuses on the application of inerter to enhance the vibration control performance of two existing control devices, the tuned mass damper (TMD) and the series double TMD (SDTMD). The inerter is employed to relate the tuned mass to the ground. In the case of TMD, a mechanical system under stiffness uncertainty is considered and the worst-case H-infinity optimization is addressed by means of an entirely algebraic approach. In the case of SDTMD, the vibration of a deterministic mechanical system is to be controlled and the H-infinity optimal design is carried out via an extended version of fixed points theory (FPT). Instead of using the inerter, the second part consists in improving the control effect by incorporating a linear negative stiffness between the ground and the tuned mass. Two case studies are conducted based on the non-traditional TMD and inerter-based dynamic vibration absorber (IDVA), whose tuned mass is related to the ground by a viscous damper or an inerter-based mechanical network, respectively. Later, the exact electrical realization of non-traditional configurations with or without negative stiffness is proposed, which is based on the piezoelectric transducer enclosed by a particular shunt circuit. This electromechanical analogy enables to extend the applicability of mechanical control devices and to facilitate the precise tuning. In the last part, active and semi-active vibration control techniques are developed. The first strategy consists in enhancing the control capability of passive TMD and IDVA by feeding back the displacement signal of mechanical system to the electromagnetic actuator. The proposed controller can be regarded as one or multiple basic units arranged in series, which is featured by one pole at the origin and two coalesced zeros on the real axis. Distinguished from the previous strategy, the semi-active control technique is based on electromagnetic shunt damping (EMSD), therefore, no additional sensor is required to measure the information of mechanical system. In order to artificially increase the shunt damping performance, the employment of negative inductance (NI) in the shunt circuit is considered. Three possible layouts of NI in the EMSD are assessed in terms of the electromechanical coupling factor, which quantifies the energy conversion efficiency between mechanical and electrical domains. Finally, six types of shunt circuits are optimally tuned according to the FPT and the beneficial effect of NI and the influence of its layout can be underlined
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MORELLI, LAURA. "Studio di un assorbitore isteretico per la mitigazione delle vibrazioni strutturali." Doctoral thesis, 2020. http://hdl.handle.net/11573/1357259.
Full textAbstract:
La mitigazione delle vibrazioni rappresenta uno dei problemi di principale interesse nel campo dell’ingegneria
civile e meccanica. Dopo il contributo di Den Hartog, sui tuned mass dampers viscoelastici, negli ultimi anni
sono state proposte differenti soluzioni, in particolare l’impiego di un collegamento nonlineare tra il sistema
principale e la massa aggiunta. Questa nonlinearità, che si manifesta con la rigidezza e lo smorzamento
dipendenti dall’ampiezza dell’oscillazione, può essere realizzata, ad esempio, mediante isteresi della forza di
richiamo del dispositivo. Come recentemente mostrato da diversi autori, l’isteresi può favorire l’insorgere di
particolari fenomeni nonlineari, che producono effetti vantaggiosi nel campo della mitigazione delle
vibrazioni. Focalizzando l’attenzione su tale aspetto, nella Tesi ci si propone di indagare, attraverso indagini
numeriche e sperimentali, l’efficacia di un assorbitore isteretico di vibrazioni (Hysteretic Vibration Absorber
- HVA) ottimizzato per mitigare le vibrazioni delle barriere antirumore su linee ferroviarie dell’alta velocità.
Queste strutture, soggette a problemi di fatica, causati dal continuo transito ferroviario, potrebbero, dunque,
beneficiare di un intervento di mitigazione. La strategia proposta prevede l’impiego di un assorbitore isteretico,
in condizioni di risonanza interna (1:1), modellato attraverso il legame di Bouc-Wen. I parametri ottimali
impiegati nella progettazione sono quelli di un assorbitore viscoelastico (VTMD) determinati attraverso la
metodologia di Den Hartog. A causa della natura nonlineare del collegamento, la progettazione ha tenuto conto
del livello di intensità della forzante, calibrando i parametri al fine di garantire il raggiungimento di prestazioni
ottimali nel campo di spostamenti atteso sotto la forzante del treno. La realizzazione dell'assorbitore ha previsto
l’impiego di diverse tipologie di dispositivi isteretici (gomma o cavi), caratterizzati attraverso test di
laboratorio; sulla base dei dati sperimentali si identificano i parametri ottimali del modello di Bouc-Wen.
L’efficacia del dispositivo realizzato è valutata attraverso analisi numeriche e sperimentali su un prototipo,
rappresentativo della barriera, con la forzante del treno e le oscillazioni libere.
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Ingraham, Patrick. "Détection et caractérisation de naines brunes et exoplanètes avec un filtre accordable pour applications dans l'espace." Thèse, 2013. http://hdl.handle.net/1866/9194.
Full textAbstract:
Cette thèse porte sur la capacité à détecter des compagnons de faible intensité en présence de bruit de tavelures dans le contexte de l’imagerie à haute gamme dynamique pour l’astronomie spatiale. On s’intéressera plus particulièrement à l’imagerie spectrale différentielle (ISD) obtenue en utilisant un étalon Fabry-Pérot comme filtre accordable. Les performances d’un tel filtre accordable sont présentées dans le cadre du Tunable Filter Imager (TFI), instrument conçu pour le télescope spatial James Webb (JWST).
La capacité de l’étalon à supprimer les tavelures avec ISD est démontrée expérimentalement grâce à un prototype de l’étalon installé sur un banc de laboratoire. Les améliorations de contraste varient en fonction de la séparation, s’étendant d’un facteur 10 pour les séparations supérieures à 11 lambda/D jusqu’à un facteur 60 à 5 lambda/D. Ces résultats sont cohérents avec une étude théorique qui utilise un modèle basé sur la propagation de Fresnel pour montrer que les performances de suppression de tavelures sont limitées par le banc optique et non pas par l’étalon. De plus, il est démontré qu’un filtre accordable est une option séduisante pour l’imagerie à haute gamme dynamique combinée à la technique ISD. Une seconde étude basée sur la propagation de Fresnel de l’instrument TFI et du télescope, a permis de définir les performances de la technique ISD combinée avec un étalon pour l’astronomie spatiale. Les résultats prévoient une amélioration de contraste de l’ordre de 7 jusqu’à 100, selon la configuration de l’instrument. Une comparaison entre ISD et la soustraction par rotation a également été simulée. Enfin, la dernière partie de ce chapitre porte sur les performances de la technique ISD dans le cadre de l’instrument Near-Infrared Imager and Slitless Spectrograph (NIRISS), conçu pour remplacer TFI comme module scientifique à bord du Fine Guidance Sensor du JWST.
Cent quatre objets localisés vers la région centrale de la nébuleuse d’Orion ont été caractérisés grâce à un spectrographe multi-objet, de basse résolution et multi-bande (0.85-2.4 um). Cette étude a relevé 7 nouvelles naines brunes et 4 nouveaux candidats de masse planétaire. Ces objets sont utiles pour déterminer la fonction de masse initiale sous-stellaire et pour évaluer les modèles atmosphériques et évolutifs futurs des jeunes objets stellaires et sous-stellaires. Combinant les magnitudes en bande H mesurées et les valeurs d’extinction, les objets classifiés sont utilisés pour créer un diagramme de Hertzsprung-Russell de cet amas stellaire. En accord avec des études antérieures, nos résultats montrent qu’il existe une seule époque de formation d’étoiles qui a débuté il y a environ 1 million d’années. La fonction de masse initiale qui en dérive est en accord avec des études antérieures portant sur d’autres amas jeunes et sur le disque galactique.This thesis determines the capability of detecting faint companions in the presence of speckle noise when performing space-based high-contrast imaging through spectral differential imagery (SDI) using a low-order Fabry-Perot etalon as a tunable filter. The performance of such a tunable filter is illustrated through the Tunable Filter Imager (TFI), an instrument designed for the James Webb Space Telescope (JWST). Using a TFI prototype etalon and a custom designed test bed, the etalon’s ability to perform speckle-suppression through SDI is demonstrated experimentally. Improvements in contrast vary with separation, ranging from a factor of 10 at working angles greater than 11 lambda/D and increasing up to a factor of 60 at 5 lambda/D. These measurements are consistent with a Fresnel optical propagation model which shows the speckle suppression capability is limited by the test bed and not the etalon. This result demonstrates that a tunable filter is an attractive option to perform high-contrast imaging through SDI. To explore the capability of space-based SDI using an etalon, we perform an end-to-end Fresnel propagation of JWST and TFI. Using this simulation, a contrast improvement ranging from a factor of 7 to 100 is predicted, depending on the instrument’s configuration. The performance of roll-subtraction is simulated and compared to that of SDI. The SDI capability of the Near-Infrared Imager and Slitless Spectrograph (NIRISS), the science instrument module to replace TFI in the JWST Fine Guidance Sensor is also determined. Using low resolution, multi-band (0.85-2.4 um) multi-object spectroscopy, 104 objects towards the central region of the Orion Nebular Cluster have been assigned spectral types including 7 new brown dwarfs, and 4 new planetary mass candidates. These objects are useful for determining the substellar initial mass function and for testing evolutionary and atmospheric models of young stellar and substellar objects. Using the measured H band magnitudes, combined with our determined extinction values, the classified objects are used to create an Hertzsprung-Russell diagram for the cluster. Our results indicate a single epoch of star formation beginning 1 Myr ago. The initial mass function of the cluster is derived and found to be consistent with the values determined for other young clusters and the galactic disk.
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Liu, William, and 劉克湘. "A Study of Key Success Factor for Mass Rapid Transit System Maintenance Outsourcing: In accordance with enterprise requirement." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/80494058497181323242.
Full textAbstract:
碩士國立臺北大學
企業管理學系
92
Outsourcing strategy has been operated by enterprises for years. Along with global business keen competition and management modification, outsourcing plays a key role not only for developed countries to accumulate competition, but also for many developing nations. Outsourcing strategy in today’s economy of knowledge era represents kind of completely different tactic. Traditional outsourcing mode primarily takes Economics of Scale, Time Cost and external professional for consideration, nevertheless today’s enterprises use outsourcing not just for purpose of cost saving, but more important is to enable enterprises clearly and definitely command market orientation, management strategy and clients to concentrate resources to develop core competitive advantages, and also to enlarge its added value by relying on external professional. Consequently this research is to study Mass Transit System Maintenance Outsourcing Key Success Factor in accordance with enterprise requirement as analysis axis. Under phases of enterprise outsourcing requirements factor, service supplier factor, outsourcing execution situation, this research carries out analysis in scope of local Railway companies by ways of related analysis, ANOVA, related statistic analysis etc. In conclusion found out that within enterprise requirement factor phase, (i.e. management, R&D, finance, organization, production, human resource, policy) “provided with definite outsourcing goal and items”, “promotion of staff quality”, “reduction of software/hardware update and maintenance cost”, “reduction of staff organization”, “acceleration of maintenance work”, “frequency and time reduction of professionals cultivation”, and “encouraging non-governmental companies to join and mobilize relate industries” are primary key factors. Within service supplier phase, (i.e. information obtainment and sharing, financial and technological ability, experience and performance) “interaction with equipment supplier”, “high current ratio”, “provided with similar maintenance experience” are primary key factors. This research studies base on aspects of enterprise requirement and what acquired from it could be reference for those MRT Maintenance companies executing or evaluation outsourcing and expects to introduce proper and efficient maintenance outsourcing mode for enterprises clearly and definitely to command market orientation, management strategy and clients to concentrate resources to develop core competitive advantages, and also to enlarge its added value.
Books on the topic "Masse accordate"
1
King, John N. Religious Change in the Mid-Tudor Period. Edited by Andrew Hiscock and Helen Wilcox. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199672806.013.4.
Full textAbstract:
Mid-sixteenth-century England witnessed unprecedented religio-political turmoil. Following the death of Henry VIII in 1547, the government of Edward VI fostered a controversial programme of Protestant reform by instituting public worship in the vernacular based upon Bible readings, officially authorized sermons, and rejection of transubstantiation and replacement of the Mass with celebration of Holy Communion in the form of a communal meal in accordance with the second Book of Common Prayer (1552). The government relaxed restraints on Protestant propaganda at the same time that it blocked publication of Roman Catholic books. Following King Edward’s death in 1553, Mary I reversed changes in the state religion introduced under her late father and brother. Book publication underwent contraction as the government encouraged renewed publication of Roman Catholic books. Following the accession of Elizabeth I in 1558, her government restored Protestant doctrine and worship in line with the 1552 prayer book.
2
Nardini, Luisa. Chants, Hypertext, and Prosulas. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197514139.001.0001.
Full textAbstract:
The liturgical chant that was sung in the churches of southern Italy between the ninth and the thirteenth centuries reflects the multiculturalism of a territory in which Roman, Franks, Lombards, Byzantines, Normans, Jews, and Muslims were present at various times and with different political roles. This book examines a specific genre, the prosulas that were composed to embellish and expand preexisting liturgical chants of the liturgy of mass. Widespread in medieval Europe, prosulas were highly cultivated in southern Italy, especially by the nuns, monks, and clerics in the city of Benevento. They shed light on the creativity of local cantors to provide new meanings to the liturgy in accordance with contemporary waves of religious spirituality and to experiment with a novel musical style in which a syllabic setting is paired with the free-flowing melody of the parent chant. In their representing an epistemological “beyond” and because of their interconnectedness with the parent chant, they can be likened to modern hypertexts. The emphasis on universal saints of ancient lineage stressed the perceived links with the cradles of Christianity, Africa and West Asia, and the center of the papal power, Rome, while the high number of Christological prosulas in manuscripts used in nunneries might be tied to the devotion to Jesus as “spiritual spouse” that was typical of female religiosity. Full editions of texts, melodies, and manuscript facsimiles in the companion website enrich the study of the stylistic features and the cultural components of this fascinating genre.
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Zydroń, Tymoteusz. Wpływ systemów korzeniowych wybranych gatunków drzew na przyrost wytrzymałości gruntu na ścinanie. Publishing House of the University of Agriculture in Krakow, 2019. http://dx.doi.org/10.15576/978-83-66602-46-5.
Full textAbstract:
The aim of the paper was to determine the influence of root systems of chosen tree species found in the Polish Flysch Carpathians on the increase of soil shear strength (root cohesion) in terms of slope stability. The paper's goal was achieved through comprehensive tests on root systems of eight relatively common in the Polish Flysch Carpathians tree species. The tests that were carried out included field work, laboratory work and analytical calculations. As part of the field work, the root area ratio (A IA) of the roots was determined using the method of profiling the walls of the trench at a distance of about 1.0 m from the tree trunk. The width of the. trenches was about 1.0 m, and their depth depended on the ground conditions and ranged from 0.6 to 1.0 m below the ground level. After preparing the walls of the trench, the profile was divided into vertical layers with a height of 0.1 m, within which root diameters were measured. Roots with diameters from 1 to 10 mm were taken into consideration in root area ratio calculations in accordance with the generally accepted methodology for this type of tests. These measurements were made in Biegnik (silver fir), Ropica Polska (silver birch, black locust) and Szymbark (silver birch, European beech, European hornbeam, silver fir, sycamore maple, Scots pine, European spruce) located near Gorlice (The Low Beskids) in areas with unplanned forest management. In case of each tested tree species the samples of roots were taken, transported to the laboratory and then saturated with water for at least one day. Before testing the samples were obtained from the water and stretched in a. tensile testing machine in order to determine their tensile strength and flexibility. In general, over 2200 root samples were tested. The results of tests on root area ratio of root systems and their tensile strength were used to determine the value of increase in shear strength of the soils, called root cohesion. To this purpose a classic Wu-Waldron calculation model was used as well as two types of bundle models, the so called static model (Fiber Bundle Model — FIRM, FBM2, FBM3) and the deformation model (Root Bundle Model— RBM1, RBM2, mRBM1) that differ in terms of the assumptions concerning the way the tensile force is distributed to the roots as well as the range of parameters taken into account during calculations. The stability analysis of 8 landslides in forest areas of Cicikowicleie and Wignickie Foothills was a form of verification of relevance of the obtained calculation results. The results of tests on root area ratio in the profile showed that, as expected, the number of roots in the soil profile and their ApIA values are very variable. It was shown that the values of the root area ratio of the tested tree species with a diameter 1-10 ram are a maximum of 0.8% close to the surface of the ground and they decrease along with the depth reaching the values at least one order of magnitude lower than close to the surface at the depth 0.5-1.0 m below the ground level. Average values of the root area ratio within the soil profile were from 0.05 to 0.13% adequately for Scots pine and European beech. The measured values of the root area ratio are relatively low in relation to the values of this parameter given in literature, which is probably connected with great cohesiveness of the soils and the fact that there were a lot of rock fragments in the soil, where the tests were carried out. Calculation results of the Gale-Grigal function indicate that a distribution of roots in the soil profile is similar for the tested species, apart from the silver fir from Bie§nik and European hornbeam. Considering the number of roots, their distribution in the soil profile and the root area ratio it appears that — considering slope stability — the root systems of European beech and black locust are the most optimal, which coincides with tests results given in literature. The results of tensile strength tests showed that the roots of the tested tree species have different tensile strength. The roots of European beech and European hornbeam had high tensile strength, whereas the roots of conifers and silver birch in deciduous trees — low. The analysis of test results also showed that the roots of the studied tree species are characterized by high variability of mechanical properties. The values Of shear strength increase are mainly related to the number and size (diameter) of the roots in the soil profile as well as their tensile strength and pullout resistance, although they can also result from the used calculation method (calculation model). The tests showed that the distribution of roots in the soil and their tensile strength are characterized by large variability, which allows the conclusion that using typical geotechnical calculations, which take into consideration the role of root systems is exposed to a high risk of overestimating their influence on the soil reinforcement. hence, while determining or assuming the increase in shear strength of soil reinforced with roots (root cohesion) for design calculations, a conservative (careful) approach that includes the most unfavourable values of this parameter should be used. Tests showed that the values of shear strength increase of the soil reinforced with roots calculated using Wu-Waldron model in extreme cases are three times higher than the values calculated using bundle models. In general, the most conservative calculation results of the shear strength increase were obtained using deformation bundle models: RBM2 (RBMw) or mRBM1. RBM2 model considers the variability of strength characteristics of soils described by Weibull survival function and in most cases gives the lowest values of the shear strength increase, which usually constitute 50% of the values of shear strength increase determined using classic Wu-Waldron model. Whereas the second model (mRBM1.) considers averaged values of roots strength parameters as well as the possibility that two main mechanism of destruction of a root bundle - rupture and pulling out - can occur at the same. time. The values of shear strength increase calculated using this model were the lowest in case of beech and hornbeam roots, which had high tensile strength. It indicates that in the surface part of the profile (down to 0.2 m below the ground level), primarily in case of deciduous trees, the main mechanism of failure of the root bundle will be pulling out. However, this model requires the knowledge of a much greater number of geometrical parameters of roots and geotechnical parameters of soil, and additionally it is very sensitive to input data. Therefore, it seems practical to use the RBM2 model to assess the influence of roots on the soil shear strength increase, and in order to obtain safe results of calculations in the surface part of the profile, the Weibull shape coefficient equal to 1.0 can be assumed. On the other hand, the Wu-Waldron model can be used for the initial assessment of the shear strength increase of soil reinforced with roots in the situation, where the deformation properties of the root system and its interaction with the soil are not considered, although the values of the shear strength increase calculated using this model should be corrected and reduced by half. Test results indicate that in terms of slope stability the root systems of beech and hornbeam have the most favourable properties - their maximum effect of soil reinforcement in the profile to the depth of 0.5 m does not usually exceed 30 kPa, and to the depth of 1 m - 20 kPa. The root systems of conifers have the least impact on the slope reinforcement, usually increasing the soil shear strength by less than 5 kPa. These values coincide to a large extent with the range of shear strength increase obtained from the direct shear test as well as results of stability analysis given in literature and carried out as part of this work. The analysis of the literature indicates that the methods of measuring tree's root systems as well as their interpretation are very different, which often limits the possibilities of comparing test results. This indicates the need to systematize this type of tests and for this purpose a root distribution model (RDM) can be used, which can be integrated with any deformation bundle model (RBM). A combination of these two calculation models allows the range of soil reinforcement around trees to be determined and this information might be used in practice, while planning bioengineering procedures in areas exposed to surface mass movements. The functionality of this solution can be increased by considering the dynamics of plant develop¬ment in the calculations. This, however, requires conducting this type of research in order to obtain more data.
Book chapters on the topic "Masse accordate"
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Vessal, Saeedeh Rezaee, Pierre Valette-Florence, and Haithem Guizani. "Customer’s Higher Willingness to Pay in Accordance with Mass Customization." In Rediscovering the Essentiality of Marketing, 535–36. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29877-1_109.
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"Genetic Algorithms." In Advances in Civil and Industrial Engineering, 63–89. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-8958-7.ch004.
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This chapter includes the second phase of the Re-Coding Homes Project, which has been conducted as a TUBITAK (The Scientific and Technological Research Council of Turkey) research project with the title “A User-Centered Model Research Towards a Flexible Interior Spatial Design for Mass Housing Units: Urban Renewal Housing.” In this phase, which will be presented in this chapter, the design model and an expert system have been developed with the aim of improving the interior spaces of mass housing projects in accordance with different user needs and providing solutions that will increase the flexibility of apartment interiors. The expert system that can operate the flexible modular system proposed in the housing units has made it possible to achieve a large number of spatial variations by means of “multi-parameter layout design.” “Mass-customization” approach was used in order to generate satisfactory results for users' spatial needs and life styles.
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Barbato, Matteo. "The Discursive Parameters Of Athenian Democratic Institutions." In The Ideology of Democratic Athens, 57–81. Edinburgh University Press, 2020. http://dx.doi.org/10.3366/edinburgh/9781474466424.003.0003.
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This chapter argues that Athenian democratic institutions were characterised by discursive parameters which conditioned the behaviour of political actors and the construction of democratic ideology. The state funeral for the war dead led orators to produce an idealised image of the city to construct an imagined community. The litigants in the lawcourts were bound by the Heliastic Oath to couch their arguments in accordance with justice and specific legal charges. The speakers in the Assembly were expected to address issues of advantage and discuss the best policy for the city, while in the Council the focus on justice and advantage coexisted in accordance with the Bouleutic Oath. The dramatic festivals enabled the tragedians to pose questions on and reaffirm shared values and beliefs. The discussion of the discursive parameters of Athenian institution in this chapter also illuminates some characteristics of Athenian democratic ideology, most notably its constructive (rather than negative) function, its normative value, and its bidirectional nature which actively involved both the elite (as orators, playwrights, or chorēgoi) and the mass (through participation in ritual, voting, clamouring, providing councillors, or manning choruses).
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Garip, S. Banu, Nilufer Saglar Onay, and Ervin Garip. "Re-Coding Homes as a Flexible Design Approach for Living Environments." In Advances in Media, Entertainment, and the Arts, 284–306. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2823-5.ch013.
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This chapter discusses the results of the “Recoding Homes Project,” which has been conducted as a TUBITAK (The Scientific and Technological Research Council of Turkey) research project with the title “A User-Centered Model Research Towards a Flexible Interior Spatial Design for Mass Housing Units: Urban Renewal Housing.” The project aims to improve the interior spaces of mass housing projects in accordance with user needs and to provide solutions that will increase the flexibility of interior spaces. The design model outlined in this chapter has the potential to change the traditional ways of housing supply as it gives the possibility to produce complete living environments with all their necessary components. It investigates how an interior design model can transform existing spaces into more flexible and more functional housing units. This way of housing supply can eliminate the non-compatibility between the architectural features and interior components often chosen randomly without evaluating actual conditions and needs.
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Heleno, Nadine, Filipa Brandão, and Zélia Breda. "Community-Based Tourism and the Sustainable Development of Rural Territories." In Handbook of Research on the Role of Tourism in Achieving Sustainable Development Goals, 193–213. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-5691-7.ch011.
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Nowadays, trends in the tourism sector are changing, and tourists are increasingly looking for an authentic experience. They wish to escape from mass tourism and urban spaces, as well as their awareness for sustainability is increasing. In response to this trend, community-based tourism in rural settings has the potential to meet the demand requirements, while ensuring benefits to the territory and community of rural destinations. The present chapter aims to present the dynamics of community-based tourism and how it can promote regional development in rural, low-density regions, in accordance to the Sustainable Development Goals, and with high participation of residents in the several areas of the tourism industry.
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Kumar, Satish, Vikas Kumar, Rakesh Sharma, Anna Aleena Paul, Priyanka Suthar, and Rajni Saini. "Plant Proteins as Healthy, Sustainable and Integrative Meat Alternates." In Vegetarianism and Veganism [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94094.
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Vegetarian protein diet based food industry have emerged as one of the fastest growing industries with largest than ever shelf space it has created in today’s market. The rapid growth of plant protein industry is attributed to increased health awareness, economic and environmental sustainability issues of animal proteins and their nutritious, economical, and healthy food image among masses. Technological interventions like extrusion texturization has enabled the food engineers to create the imitation meat which approximates the esthetic attributes (texture, flavor, and appearance, binding ability, chewiness, firmness or softness) and/or chemical nature of meat. These texturized plant proteins are healthier and economical meat substitutes with sufficient opportunity to manage modify or change their functional properties in accordance to specific consumer demands.
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Moore, Bob. "Scandinavia and the Low Countries." In Prisoners of War, 90–113. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780198840398.003.0004.
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Often overlooked in the wider history of the Second World War, the German handling of prisoners taken in the Norwegian and Low Countries campaigns was ostensibly in accordance with the terms of the Geneva Convention to which all parties had been signatories. However, political considerations also played a role in the process, with the Germans deciding not to maintain the internment of the majority of Norwegian, Dutch, or Flemish prisoners who were regarded as racially compatible with the future Greater German Reich. While partly a hearts-and-minds operation, it also served to free up space for the huge numbers of prisoners taken during the campaign against France. This mass demobilization left only francophone Belgians and some intransigent Norwegian and Dutch officers in captivity whose stories have come to have a disproportionate influence on their respective national historiographies.
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Asakitikpi, Aretha Oluwakemi, and Samuel Oluwafemi Adeyeye. "Discourse and Multimodal Analysis of Netizens' Reactions to the Nigerian 2015 Presidential Elections." In Advances in Electronic Government, Digital Divide, and Regional Development, 90–105. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1859-4.ch006.
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Words and images are channels through which identities and realities are created. In the traditional mass media the power to do this is controlled by management in accordance to prescribed rules and stakeholder desires. This concept shifts with newer media forms like Facebook which transforms the power into the hands of the netizens. This is considered in relation to postings on the Facebook pages of the Osun Political Parrot with regards the Nigerian Presidential Election. The chapter builds its analysis on the liberty netizens have through the internet and the limited monopoly the encoder has over their uploaded comments. It examines the quality of comments netizens make based on their application of intertextually derived knowledge from other media texts. Using Discourse Analysis and Multimodal Methods, examinations of word and image associations in uploaded posts and comments made on March 22-28, a week to the Nigerian 2015 Presidential Elections is done.
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Harris, Roger W., Doug Vogel, and Lars H. Bestle. "E-Community-Based Tourism for Asia's Indigenous People." In Information Technology and Indigenous People, 245–56. IGI Global, 2007. http://dx.doi.org/10.4018/978-1-59904-298-5.ch032.
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Indigenous peoples are good for national tourism development in Asia because they present an exotic image that helps to differentiate countries from each other. However, tourism is far from being good for indigenous peoples, as they are often excluded from the revenues that tourism generates and are subjected to the environmental degradation and cultural pollution that mass tourism inflicts upon them. information and communication technologies (ICTs) in the hands of such people can help alleviate some of this imbalance. By catering to the rising demand for authentic travel experiences that do not damage the environment, and in a manner that is under the control of the indigenous peoples themselves, ICTs empower local communities to operate small-scale tourism on their own terms. Once familiar with the ICTs, such people can go on to apply them to their special needs, in accordance with international conventions concerning the well-being of indigenous peoples.
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Ozgen, Ozlen, and Kamile Elmasoglu. "A Film Analysis Related to Globalization and Capitalist Consumer Culture and Its Reflections on Advertising Industry." In Advances in Media, Entertainment, and the Arts, 212–29. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8491-9.ch013.
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In this chapter, the changes in consumer culture and advertising industry are analyzed within the frame of globalization and capitalism through a French film 99 Francs, released in 2007. In the first section of this study the headlines of globalization and capitalist network, the effect of globalization on the consumer, advertisement and advertising industry, and the functions of advertising agencies as the head actors in advertising industry are dealt with. In the second phase of the study, the French film called 99 Francs is semiologically analyzed. Within this context, firstly general information and formal expression of the film; secondly, inspired by Barthes' semiological approach, an analysis on “denotation and connotation” is addressed. Human, object, and setting images in the film are handled in accordance with the progress in the field of consumer culture and advertisement in the globalization period. Consequently, the advertisement industry has an effective long-term role on providing a circulation of mass consumers.
Conference papers on the topic "Masse accordate"
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Hu, Yexun, Tai-Xiang Jiang, and Xi-Le Zhao. "Degradation Accordant Plug-and-Play for Low-Rank Tensor Completion." In Thirty-First International Joint Conference on Artificial Intelligence {IJCAI-22}. California: International Joint Conferences on Artificial Intelligence Organization, 2022. http://dx.doi.org/10.24963/ijcai.2022/256.
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Tensor completion aims at estimating missing values from an incomplete observation, playing a fundamental role for many applications. This work proposes a novel low-rank tensor completion model, in which the inherent low-rank prior and external degradation accordant data-driven prior are simultaneously utilized. Specifically, the tensor nuclear norm (TNN) is adopted to characterize the overall low-dimensionality of the tensor data. Meanwhile, an implicit regularizer is formulated and its related subproblem is solved via a deep convolutional neural network (CNN) under the plug-and-play framework. This CNN, pretrained for the inpainting task on a mass of natural images, is expected to express the external data-driven prior and this plugged inpainter is consistent with the original degradation process. Then, an efficient alternating direction method of multipliers (ADMM) is designed to solve the proposed optimization model. Extensive experiments are conducted on different types of tensor imaging data with the comparison with state-of-the-art methods, illustrating the effectiveness and the remarkable generalization ability of our method.
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Langenstein, Magnus. "Power Recapture and Power Uprate in NPPs With Process Data Reconciliation in Accordance With VDI 2048." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89025.
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The determination of the thermal reactor power is traditionally done by establishing the heat balance: • for a boiling water reactor (BWR) at the interface of reactor control volume and heat cycle; • for a pressurized water reactor (PWR) at the interface of the steam generator control volume and turbine island on the secondary side. The uncertainty of these traditional methods is not easy to determine and it can be in the range of several percent. Technical and legal regulations (e.g. 10CFR50) cover an estimated instrumentation error of up to 2% by increasing the design thermal reactor power for emergency analysis to 102% of the licensed thermal reactor power. Basically, the licensee has the duty to warrant at any time operation inside the analysed region for thermal reactor power. This is normally done by keeping the indicated reactor power at the licensed 100% value. A better way is to use a method which allows a continuous warranty evaluation. The quantification of the level of fulfilment of this warranty is only achievable by a method which: • is independent of single measurements accuracies; • results in a certified quality of single process values and for the total heat cycle analysis; • leads to complete results including 2-sigma deviation especially for thermal reactor power. This method, which is called ‘process data reconciliation based on VDI 2048 guideline’, is presented here [1, 2]. The method allows to determine the true process parameters with a statistical probability of 95%, by considering closed material, mass- and energy balances following the Gaussian correction principle. The amount of redundant process information and complexity of the process improves the final results. This represents the most probable state of the process with minimized uncertainty according to VDI 2048. Hence, calibration and control of the thermal reactor power are possible with low effort but high accuracy and independent of single measurement accuracies. Furthermore, VDI 2048 describes the quality control of important process parameters. Applied to the thermal reactor power, the statistical certainty of warranting the allowable value can be quantified. This quantification allows keeping a safety margin in agreement with the authority. This paper presents the operational application of this method at an operating plant and describes the additional use of process data reconciliation for acceptance tests, power recapture and system and component diagnosis.
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Li, Xin, Wenhua Wang, Zuxing Pan, and Bin Wang. "Vibration Control of a Jacket Offshore Wind Turbine Under Earthquake Wind and Wave Loads by Tuned Mass Damper." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18380.
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Abstract The fully coupled analysis model of a jacket offshore wind turbine (OWT) is established based on the governing equation of motion of the structure which is derived in accordance with the blade element momentum theory (BEM), Morison formula and theories of structural dynamics. The dynamic characteristics and structural responses of the jacket OWT under the different combined seismic cases are analyzed. It can be seen that the interactions of the wind and wave loads are non-negligible in the seismic analysis of an OWT, and the abundant dominant frequencies of the responses of the support system under the combined seismic cases are discovered. Meanwhile, the passive control method of tuned mass dampers (TMD) is applied to the support system of the OWT under the earthquakes, and the influence of the TMD parameters on the reduction of the responses of the support system are investigated. Furthermore, according to the reduction of the structural responses, the suggestions for the design of a TMD under the combined seismic cases for the bottom fixed OWT are summarized.
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Audard, F., P. Fede, O. Simonin, and E. Belut. "Numerical Analysis of Dust Emission by Powder Discharge and Jet Expansion." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-32120.
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The paper deals with the Euler-Euler numerical simulation of an experimental study (Ansart et al., 2009 [1]) of freely falling granular jet for investigating the dispersion of dust. The configuration is a bunker, where quasi-static particulate flow takes place, and a free-fall chamber. As a first step, a frictional viscosity model developed by Srivastava and Sundaresan (2003) [2] is implemented to take into account the frictional effects occurring in the quasi-static particulate flows. Without the frictional model for the viscosity, the numerical simulations overpredict the solid mass flow rate at the outlet of the bunker. When using the frictional viscosity, the solid mass flow rate is in better accordance with the experimental value. However, the solid velocity is overestimated in numerical simulations.
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Busarev, V. V. "Active asteroids of the Main Belt as probable relics of the formation processes of giant planets." In ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021. Crossref, 2022. http://dx.doi.org/10.51194/vak2021.2022.1.1.076.
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The discovery and study of cometary activity of some bodies in the Main-Belt of asteroids (MBA) over the past decadeallowed us suggest that the most common cause of this phenomenon is a significant content of water ice in the subsurfacelayers of primitive asteroids. Accordingly, this may be a sign of the formation of such asteroids (or their parent bodies)behind the snowline. As demonstrated analytical calculations performed more than 50 years ago [1], a sharp increase inthe number and total mass of stone-ice bodies behind the snowline let possible the runaway growth of giant planets there,especially Jupiter. As follows from predominately hydrogen content of Jupiter’s atmosphere, its core probably formed overa few first million years due to the accretion of smaller bodies. However, should keep in mind that this process graduallychanged into its opposite. When the core of a giant planet is reaching several masses of the Earth, the capture and absorptionby it of smaller bodies is replacing by their gravitational ejection far beyond the zone of formation. Thus, all giant planetsmight have alternately turned (starting with Jupiter and ending with the most distant Neptune in accordance with thechronology of their formation) into “transporters” of small bodies of rock-ice composition from their zones of formation toother regions of the early Solar System including the MBA, where they now could be observed as active asteroids.
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Cheng, Ling, and Hanzhong Tao. "Thermal Image Analysis on the Axial Temperature Distribution of an AGHP (Axial Grooved Heat Pipe)." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18105.
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The wall temperature field on the condenser section of an AGHP (Axial Grooved Heat Pipe) is measured by infrared thermal imaging technology, and the temperature field information on condenser wall is obtained in the horizontal and vertical working conditions and different temperature conditions. In accordance with the temperature field, Combination of the interaction characteristics between vapor-liquid two-phase annular flow, and by calculating, the accuracy to predict the outcome on non-condensable gas region is verified. Based on the distance to evaporator outlet, the condenser of the AGHP is divided into four regions for analysis. The zone I is closest to evaporator outlet and zone IV is located at the end of condenser. There are different characteristics in 4 zones for the AGHP with different vacuum degree and working conditions. On the conditions of horizontal working status, for the high vacuum AGHP, steadily working region, small fluctuations region, large fluctuations region and temperature recovery region will appear in turn. However for the low vacuum one, the single temperature fluctuation region and a linear decline region come forth followed by the abnormal increase region and steadily working region. Recurring to the analysis of wall temperature information, the characteristics of two-phase vapor-liquid phase change heat transfer and capillary driven flow inner the AGHPs can be discerned qualitatively or semi-quantitatively and some of the laws, Such as vacuum degree, two-phase flow instability are conjectured. The research content in this paper will redound to understanding inner working mechanism for an AGHP or a small heat pipe, and at the same time, provide theory evidences for heat pipe testing in the service of mass production.
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Mačkić, Milica, Vojislava Bursić, Gorica Vuković, Tijana Stojanović, Dušan Marinković, Aleksandra Petrović, Nikola Puvača, and Snežana Tanasković. "DEVELOPMENT AND VALIDATION OF A RELIABLE LC-MS/MS METHOD FOR THE QUANTITATIVE ANALYSIS OF PESTICIDE RESIDUES IN SOIL." In XXVII savetovanje o biotehnologiji. University of Kragujevac, Faculty of Agronomy, 2022. http://dx.doi.org/10.46793/sbt27.339m.
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n order to carry out the multi-residue determination of the pesticides in the soil the liquid chromatography coupled with tandem mass spectrometry with a triple quadrupole analyzer was applied. The basis of the method is the modified version of the environmentally friendly QuEChERS extraction. The validation parameters (linearity, recovery, precision, matrix effects, limit of detection and limit of quantification) were set in accordance with the SANTE/12682/2019. The obtained results show that the applied method represents the safe and reliable determination method for the cyprodinil, fenpropimorph, prochloraz and tebuconazole residues in the soil.
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Solaas, Frøydis, Fredrik Mentzoni, Mia Abrahamsen-Prsic, and Trygve Kristiansen. "An Experimental and Numerical Study of Added Mass and Damping for Side by Side Plates in Oscillating Flow." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96008.
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Abstract Forced harmonic oscillations of seven configurations consisting of horizontal side by side plate elements are performed experimentally and numerically. The configurations are oscillated in vertical direction and represent generalized mudmats of subsea structures. The tests are performed for Keulegan-Carpenter (KC) numbers relevant for force estimation during lifting operations. Hydrodynamic added mass and damping coefficients are presented. The coefficients are found to be amplitude dependent for all configurations tested. The interaction effects between the plates increase with increasing amplitude and decreasing distance between the plates. For oscillation amplitudes small compared with the gap between the plates, the plates behave approximately like individual plates. A study of the relation between the damping force and the added mass force for the tested structures illustrates the importance of applying representative damping coefficients in numerical analysis of marine operations. Numerical results are obtained using a potential flow solver (BEM) and a viscous flow solver (CFD). Low-KC added mass coefficients predicted with the BEM are in accordance with the experiments. There is acceptable agreement between the CFD and the experiments. Best agreement is obtained for small KC numbers. For increasing KC numbers, the differences are, in general, larger. This is possibly due to the CFD being based on two-dimensional laminar flow.
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Mehrle, Andreas, Philipp Gittler, Mirko Javurek, and Andreas Osterkorn. "Numerical, Experimental and Analytical Investigation of the Mass Outflow From a Pickling Tank." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-3136.
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The process of pickling is an important intermediate step in the production line of steel processing. The strip surface is cleaned from grease and scales before further processing by immersion into an acid bath. Problems arising at higher process speeds with increasing inclination of the free surface are reduced strip immersion length and increased mass outflow. In this paper a differential equation is derived describing the influence of the bath depth on the local surface inclination for a simplified two-dimensional case. Since it can only be solved analytically for trivial boundary conditions a numerical solution has been computed giving an estimation for the order of growth of the bath inclination and mass outflow with the strip velocity. Further, a series of CFD simulations of the complete three-dimensional geometry at different strip velocities have been carried out calibrating the formulas of mass outflow. In the course of the CFD simulations the deformation of the free surface was calculated by a VOF model with explicit reconstruction of the interface. A standard κ–ε turbulence model was applied and special considerations have been made regarding the boundary conditions. Finally the resulting formula has been verified making use of data from a small scale model. It was found that the overflow at the far end of the tank is the dominant mass transfer mechanism at process velocities of the current generation of pickling tanks. Still, due to the superior order of growth, mass drag-out via the upper side of the strip becomes important for process velocities of 8 to 10 m/s. The good accordance of the analytical solution, CFD simulation and experiment indicate that the formula derived in the first part of the paper is a good estimation for the mass outflow from the pickling tank, hence making time and resource consuming CFD simulations obsolete for the design layout. Further the validity of geometrically non similar small scale models could be showed.
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Sung, C. K., and S. S. Shyl. "An Optimal Design of Composite Robot Arms." In ASME 1989 Design Technical Conferences. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/detc1989-0121.
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Abstract A design methodology considering the issue of manufacturability, in particular, is presented for synthesizing high-performance articulating robotic systems fabricated with optimally-tailored composite laminates. By optimally specifying the types of fiber, matrix, stacking sequence, fiber volume fraction, fiber layups, etc., the synthesized composite material may possess significantly superior characteristics such as high damping, high stiffness, high strength and low mass. In accordance with the design requirements, the minimum deflection during articulating motion or the fast settling time after the power stopped, the design objectives and constraint conditions were specified. As an illustrative example, a two-link robot manipulator fabricated with aforementioned composite laminates is employed for demonstrating the proposed design methodology.
Reports on the topic "Masse accordate"
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Zinenko, Olena. THE SPECIFICITY OF INTERACTION OF JOURNALISTS WITH THE PUBLIC IN COVERAGE OF PUBLIC EVENTS ON SOCIAL TOPICS. Ivan Franko National University of Lviv, February 2021. http://dx.doi.org/10.30970/vjo.2021.49.11056.
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Consideration of aspects of the functioning of mass media in society requires a comprehensive approach based on universal media theory. The article presents an attempt to consider public events in terms of a functional approach to understanding the media, proposed by media theorist Dennis McQuayl in the theory of mass communication. Public events are analyzed, on the one hand, as a complex object of journalistic reflection and, on the other hand, as a situational media that examines the relationship of agents of the social and media fields in the space of communication interaction. Taking into account philosophical approaches to the interpretation of the concept of event, considering its semantic spectrum, specificity of use and synonyms in the Ukrainian language, a working definition of the concept of public event is given. Based on case-analysis of public events, In accordance with the functions of the media the functions of public events are outlined. This is is promising for the development of study on typology of public events in the context of mass communication theory. The realization of the functions of public events as situational media is illustrated with such vivid examples of cultural events as «Gogolfest» and «Book Forum in Lviv». The author shows that a functional approach to understanding public events in society and their place in the space of mass communication, opens prospects for studying the role of media in reflecting the phenomena of social reality, clarifying the presence and quality of communication between media producers and media consumers.
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Савосько, Василь Миколайович, Юлія Віліївна Бєлик, Юрій Васильович Лихолат, Герман Хайльмейер, Іван Панасович Григорюк, Ніна Олександрівна Хромих, and Тетяна Юріївна Лихолат. The Total Content of Macronutrients and Heavy Metals in the Soil on Devastated Lands at Kryvyi Rih Iron Mining & Metallurgical District (Ukraine). Geology-dnu-dp.ua, 2021. http://dx.doi.org/10.31812/123456789/4286.
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The relevance of the research is due to the need to develop technologies for phytoremediation of the devastated lands in the mining and metallurgical regions of Ukraine and the world. In this regard, the creation of tree plantations adapted to the ecological conditions of such territories is considered by many experts as the most promising option for innovative technologies. However, the development of artificial woodlands requires knowledge of the pedogeochemical character- istics of devastated lands. The aim of the work was to carry out a comparative analysis of the macronutrients and heavy metals gross forms content in the soils of the devastated lands of the Kryvyi Rih mining and metallurgical region. The field studies focused on five contrasting monitoring sites of the Petrovsky dump (Central Kryvorizhzhya), which has a typical age and composition of rocks for the region. Soil sampling, drying, sieving, and sample preparation (sintering in a muffle furnace) were done in accordance with classical techniques. The concentrations of macronutrients (potassium, sodium, calcium, magnesium, sulfur, and phosphorus) and heavy metals (iron, manganese, zinc, copper, lead, and cadmium) were determined using an Inductively Coupled Plasma Mass Spectrometry (ICP- MS) X-Series 2 (Thermo Fisher Scientific, USA). The analytical part of our research was carried out on the basis of the laboratory of the Institute of Biosciences, Freiberg University of Technology and Mining Academy (Freiberg, Germany). At monitoring sites, significant differences were found in the content of macronutrients gross forms, and their variation relative to the control values as well. Potassium and sodium concentrations generally differed slightly or were close to control levels. The results of determining the content of calcium, magnesium and phosphorus indicate a significant deficiency or excess of these macronutrients in the soils of the devastated lands. An increased sulfur content was found in the soils of all monitoring sites, in some cases 4 times higher than the control level. The measured content of gross forms of iron, manganese, copper, cadmium and, partially, zinc in the soils of different monitoring sites exceeded the control values by 5.5 – 5.9 times. Thus, the analysis of the research results made it possible to establish that the soils of the devastated lands of the Petrovsky dump are characterized by unfavorable properties for the growth of most species of woody plants.
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Keshav, Dr Geetha, Dr Suwaibah Fatima Samer, Dr Salman Haroon, and Dr Mohammed Abrar Hassan. TO STUDY THE CORRELATION OF BMI WITH ABO BLOOD GROUP AND CARDIOVASCULAR RISK AMONG MEDICAL STUDENTS. World Wide Journals, February 2023. http://dx.doi.org/10.36106/ijar/2405523.
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Introduction: Advancements and increase in access to healthcare have increased the life expectancy in India from 32 years in 1947 to almost 70 years currently. Due to robust vaccination and basic health programs, most of the communicable diseases are kept under control. The disease burden is now skewed towards non-communicable diseases. It is an established fact that body mass index (BMI) is a reliable predictor of cardiovascular disease (CVD) later in life. Early prediction can decrease the disease load and enable early preventative measures. A more novel approach of connecting it with blood groups would yield profound results in predictability and subsequent management. This study was done to see correlation between BMI and known blood groups in order to predict the potential incidence of CVDs in medical students. Material and Method - A cross-sectional descriptive study was conducted in Bhaskar Medical College from September 2022 - November 2022. The sample population included 150- 1st year medical students chosen by Randomized sampling method. BMI was calculated based as weight in kilograms divided by the square of the height in meters (kg/m2). Discussion - Many studies conducted on the association of Blood groups with BMI yielded mixed and inconclusive results. On analysis of the data obtained from this study, O- positive blood group showed the highest inclination towards obesity i.e. 30 of the total participants. A-positive and B- positive blood groups were shown to have a lesser association with obesity i.e. 11 participants of the 150. These results were in accordance with a study done among female students by Shireen Javad et.al, nding blood group O to be the most prone to obesity.8 Incompatible to our results, a study conducted by Samuel Smith Isaac Okai et.al. found no signicant association between blood groups and BMI.10 Another study conducted by Christina Ravillo et.al. found that blood group O had the highest and blood group AB with lowest prevalence of obesity9. These ndings were similar to the results obtained in our study. To study the correlation of BMI with ABO blood group and Cardiovascula AIMS and OBJECTIVES Aim: - r risk among medical students. 1. Calculate and segregate the participants according to BM Objectives: - I using the standard formula provided by the WHO. 1. Determine Blood group using antisera 2. Evaluation of Lipid prole in obese individuals
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Engel, Bernard, Yael Edan, James Simon, Hanoch Pasternak, and Shimon Edelman. Neural Networks for Quality Sorting of Agricultural Produce. United States Department of Agriculture, July 1996. http://dx.doi.org/10.32747/1996.7613033.bard.
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The objectives of this project were to develop procedures and models, based on neural networks, for quality sorting of agricultural produce. Two research teams, one in Purdue University and the other in Israel, coordinated their research efforts on different aspects of each objective utilizing both melons and tomatoes as case studies. At Purdue: An expert system was developed to measure variances in human grading. Data were acquired from eight sensors: vision, two firmness sensors (destructive and nondestructive), chlorophyll from fluorescence, color sensor, electronic sniffer for odor detection, refractometer and a scale (mass). Data were analyzed and provided input for five classification models. Chlorophyll from fluorescence was found to give the best estimation for ripeness stage while the combination of machine vision and firmness from impact performed best for quality sorting. A new algorithm was developed to estimate and minimize training size for supervised classification. A new criteria was established to choose a training set such that a recurrent auto-associative memory neural network is stabilized. Moreover, this method provides for rapid and accurate updating of the classifier over growing seasons, production environments and cultivars. Different classification approaches (parametric and non-parametric) for grading were examined. Statistical methods were found to be as accurate as neural networks in grading. Classification models by voting did not enhance the classification significantly. A hybrid model that incorporated heuristic rules and either a numerical classifier or neural network was found to be superior in classification accuracy with half the required processing of solely the numerical classifier or neural network. In Israel: A multi-sensing approach utilizing non-destructive sensors was developed. Shape, color, stem identification, surface defects and bruises were measured using a color image processing system. Flavor parameters (sugar, acidity, volatiles) and ripeness were measured using a near-infrared system and an electronic sniffer. Mechanical properties were measured using three sensors: drop impact, resonance frequency and cyclic deformation. Classification algorithms for quality sorting of fruit based on multi-sensory data were developed and implemented. The algorithms included a dynamic artificial neural network, a back propagation neural network and multiple linear regression. Results indicated that classification based on multiple sensors may be applied in real-time sorting and can improve overall classification. Advanced image processing algorithms were developed for shape determination, bruise and stem identification and general color and color homogeneity. An unsupervised method was developed to extract necessary vision features. The primary advantage of the algorithms developed is their ability to learn to determine the visual quality of almost any fruit or vegetable with no need for specific modification and no a-priori knowledge. Moreover, since there is no assumption as to the type of blemish to be characterized, the algorithm is capable of distinguishing between stems and bruises. This enables sorting of fruit without knowing the fruits' orientation. A new algorithm for on-line clustering of data was developed. The algorithm's adaptability is designed to overcome some of the difficulties encountered when incrementally clustering sparse data and preserves information even with memory constraints. Large quantities of data (many images) of high dimensionality (due to multiple sensors) and new information arriving incrementally (a function of the temporal dynamics of any natural process) can now be processed. Furhermore, since the learning is done on-line, it can be implemented in real-time. The methodology developed was tested to determine external quality of tomatoes based on visual information. An improved model for color sorting which is stable and does not require recalibration for each season was developed for color determination. Excellent classification results were obtained for both color and firmness classification. Results indicted that maturity classification can be obtained using a drop-impact and a vision sensor in order to predict the storability and marketing of harvested fruits. In conclusion: We have been able to define quantitatively the critical parameters in the quality sorting and grading of both fresh market cantaloupes and tomatoes. We have been able to accomplish this using nondestructive measurements and in a manner consistent with expert human grading and in accordance with market acceptance. This research constructed and used large databases of both commodities, for comparative evaluation and optimization of expert system, statistical and/or neural network models. The models developed in this research were successfully tested, and should be applicable to a wide range of other fruits and vegetables. These findings are valuable for the development of on-line grading and sorting of agricultural produce through the incorporation of multiple measurement inputs that rapidly define quality in an automated manner, and in a manner consistent with the human graders and inspectors.