bluuebunny/crossref_metadata_2025 huggingface dataset:
MATRIZES TEÓRICAS SOBRE O DESENHO DE CRIANÇAS E ADOLESCENTES: CONTRADIÇÕES À VISTA
Authors: Anversa Priscila , Eger Sawada Gustavo
Published: December 2021

Este texto pretende colocar em debate as matrizes teóricas do desenho de crianças e adolescentes a partir de uma experiência na disciplina de Desenho Infantil, do curso de Licenciatura em Artes Visuais da Universidade do Estado de Santa Catarina (UDESC). Objetivamos analisar desenhos a partir de estudo de caso, fruto da disciplina em questão, buscando problematizar o referencial teórico sobre a temática a partir dos autores presentes no plano de ensino, evidenciando também a necessidade de ampliar estudos na área. Para tecer a crítica, partiremos de Duarte (2001, 2010), Derisso (2010) e Mesquita (2010), enquanto para contextualizar o desenho infantil e o estudo de caso, utilizaremos Mèredieu (2006) e Lowenfeld e Brittain (1977).
EXPERIÊNCIAS EDUCATIVO-ARTÍSTICAS NA DOCÊNCIA: O QUE É POSSÍVEL PENSAR E PRODUZIR COM E A PARTIR DELAS?
Authors: Munhoz Angelica Vier , Fischer Deborah Vier , Kremer Margarita Santi
Published: December 2021

O presente texto deriva da aproximação do Grupo de Pesquisa Currículo, Espaço, Movimento (CEM/CNPq) com a Fundação Vera Chaves Barcellos (FVCB), realizada por meio de observações de exposições, visitas mediadas, seminário e análise de materiais educativos. Trata-se de, por uma via, pensar nos encontros produzidos com e a partir das experiências educativo-artísticas e, por outra, de dar visibilidade às práticas realizadas pela instituição. Dos argumentos que delineiam o presente texto, toma-se a noção de encontro com os signos da arte, a partir de Gilles Deleuze (2003). Por fim, busca-se afirmar que o encontro com as experiências educativo-artísticas colabora para provocar desassossego no pensamento, possibilitando, quem sabe, uma docência mais inventiva
Synthetic Zeolites Modified with Salts of Transition Metals in the Reaction of Chemisorption-catalytic Oxidation of Sulphur Dioxide by Air Oxygen
Authors: Rakitskaya Tatyana , Kiose Tatyana , Raskola Lyudmila
Published: December 2021

The effect of the nature and concentration of d-metal salts attached to synthetic zeolites NaA and KA on the kinetic and stoichiometric parameters of the chemisorption-catalytic oxidation of sulphur dioxide with air oxygen at ambient temperature was studied. It was found that the adsorption capacity of NaA zeolite relative to SO2 is 100 times higher than that of KA zeolite; the time of protective action of NaA and KA zeolites increases upon modification with transition metal salts and with an increase of their content in the compositions. It was shown that the formation of inner and outer sphere complexes and the relationship between them is determined by the nature and concentration of metal ions and by the nature of the carrier. It was proven that the chemisorption-catalytic process ends with the oxidation of SO2 to H2SO4.
Ekmeklik buğdayda (Triticum aestivum L.) Rus buğday afidine dayanıklılık geninin ayrıntılı genetik haritalaması
Authors: EVİRGAN Meltem , İŞTİPLİLER Deniz , TOSUN Muzaffer , YILMAZ TEMEL Hülya , TURANLI Ferit , AYKUT TONK Fatma
Published: December 2021

Amaç: Bu çalışmanın amacı Rus buğday afidine dayanıklılık sağlayan Dn100695 geninin bulunduğu 7D kromozomunu SSR markörleriyle ayrıntılı bir şekilde taramak ve dayanıklılık genini çevreleyen yeni SSR markörlerini belirlemektir.

Materyal ve Yöntem: Basribey x IG 100695 melezinin 190 bireyinden oluşan F2 populasyonu haritalama amacıyla kullanılmıştır. Haritalama populasyonu daha önceki markörlere ilave olarak 7D kromozomunda bulunan 20 yeni SSR markörleri ile taranmıştır. Zararlının populasyondaki kloroz, kıvrılma ve afit yoğunluğu özellikleri fenotipik veriler olarak ele alınmıştır.

Araştırma Bulguları ve Sonuç: Çalışma sonucunda 85 polimorfik markör içerisinden 46’sı toplamda 1226.9 cM’lık bir genom bölgesini haritalandırmış ve 14 farklı bağlantı grubu oluşturmuştur. 7D kromozomu üzerinde dayanıklılık genini çevreleyen özgün bir SSR markörü (GWM121) belirlenmiş ve Dn100695 genini her iki yönden çevreleyen markörler haritalanmıştır. Ayrıca markör regresyon analizi sonucunda Rus buğday afidi dayanıklılığına katkı sağlama potansiyeli bulunan SSR markörleri de saptanmıştır.
Eskişehir ili kabakgil ekim alanlarında görülen virüs hastalıklarının belirlenmesi
Authors: KARABIYIK Mustafa , YEŞİL Serkan
Published: December 2021

Amaç: Bu araştırma, Eskişehir ili kabakgil ekim alanlarında virüs enfeksiyonlarını ve bazı yerel çerezlik kabak genotiplerinin Zucchini yellow mosaic potyvirus (ZYMV) ve Watermelon mosaic potyvirus (WMV)’ye reaksiyonlarının belirlenmesi amacıyla yapılmıştır.

Materyal ve Metod: 2019 yılı Ağustos-Eylül aylarında Eskişehir ili kabakgil ekim alanlarında gerçekleştirilen surveyler sonucunda toplanan 164 adet bitki örneği DAS-ELISA yöntemi ile ZYMV, WMV, Cucurbit aphid borne yellows polerovirus (CABYV), Cucumber mosaic cucumovirus (CMV), Papaya ringspot potyvirus-watermelon (PRSV-W), Cucurbit green mottle mosaic virus (CGMMV) ve Squash mosaic comovirus (SqMV) etmenlerine karşı testlenmişlerdir.

Bulgular: DAS-ELISA sonuçlarına göre, kabakgil bitkilerinde CABYV (%49.35), WMV (%44.87), ZYMV (%24.35), CMV (%17.30), PRSV-W (%1.28) ve SqMV (%1.92) ve yabancı ot örneklerinde ise ZYMV (%12.5) ve CABYV (%12.5) yaygın virüslerdir. Çerezlik kabak bitkilerinde mekanik inokulasyon çalışmalarının sonucuna göre, WMV’nin 5, 8 ve 9 numaralı genotipleri (%100) ve ZYMV’nin ise 9 (%95), 3 (%93) ve 7 (%91) numaralı genotipleri yüksek oranda hastalandırdığı belirlenmiştir. Eskişehir ilinde virüs hastalıklarının ortalama yaygınlık oranı %4.13 olarak belirlenmiştir.

Sonuç: Eskişehir ilinde yapılan bu çalışma ile kabakgil üretimi yapılan alanlarda sorun olan virüs etmenleri ilk kez DAS-ELISA ile ortaya konulmuştur.
Samsun ili tarım işletmelerinin sigortalanabilir risklerinin belirlenmesi ve tarım sigortası yaptırma durumu
Authors: CEYHAN Vedat , TÜRKTEN Hatice , YILDIRIM Çağatay , CANAN Selime
Published: December 2021

Amaç: Samsun ilindeki çiftçilerin riske karşı tutumlarını ortaya koymak, karşılaşılan riskleri belirlemek, karşılaşılan risklerin sigortalanabilir olup olmadığını ortaya koymak, işletme tipleri itibariyle sigortalılık oranını tespit etmek ve tarım sigortası yaptıran ve yaptırmayan işletmeleri sosyo-ekonomik özellikler açısından karşılaştırmak amaçlanmıştır.
Materyal ve Yöntem: Araştırma verileri 223 işletmeden anket yoluyla elde edilmiştir. Riske karşı tutumlarının belirlenmesinde von Neumann-Morgenstern (N-M) modelinden yararlanılmıştır. Riske karşı olma dereceleri Arrow-Pratt mutlak risk karşıtlığı katsayısı ile saptanmıştır. Riskin sigortalanabilirliği karşılaşma sıklıkları ve oluşan kayıp miktarları dikkate alınarak belirlenmiştir.
Araştırma Bulguları: Yöneticilerin %78’i riskten kaçınmaktadır. İhtisaslaşmış hayvancılık ve arıcılık işletmeleri en büyük işletme riskine sahiptir. İşletmelerin %72.6’sı sigortalanabilir riske sahiptir. Sigortalanabilir riske sahip olup, sigorta yaptırmayan hayvancılık, örtüaltı ve arıcılık işletmelerinin tarımsal geliri, sigorta yaptıranlara göre daha düşüktür. Sigortalanabilir riske sahip olan ve sigorta yaptırmayan işletmelerin sigorta yaptırabilecek düzeyde geliri elde edeceği yeterli işletme büyüklüğüne sahip olmadıkları saptanmıştır.
Sonuç: Tarım sigortası yaptırma oranını artırmak için kamu ve özel sektörün işletme büyüklüğünü ve geliri artırmak için ortak eylem planı oluşturması önerilmektedir. Ayrıca temel risk analizi konuları ile sigortalanabilir risk kavramına odaklanmış eğitimlerin düzenlenmesi ve sigorta şirketlerinde/kamuda çalışan uzmanlar ile karar alıcıların bu eğitimlere katılması yararlı olacaktır.
Çeltik (Oryza sativa L.) Tohumlarına Uygulanabilecek Vigor Test Yöntemlerinin Optimizasyonu
Authors: YİĞİT Ali , GÖKÇÖL Adem
Published: December 2021

Amaç: Çeltik yetiştiriciliğinde çimlenme gerçekleşinceye kadar birçok abiyotik ve biyotik stres koşulları meydana gelmektedir. Bu nedenle tohum gücü (vigor) değeri optimum bitki sıklığını ve birim alandan daha yüksek verimi elde edebilmek için en önemli etmen olmaktadır. Çalışmamızda farklı tohum gücü test yöntem ve koşullarının tarla çıkış testine göre optimizasyonu yapılarak uygun tohum gücü test koşullarının tohum test laboratuvarlarında kullanılması amaçlanmıştır.

Materyal ve Yöntem: Türkiye’de yaygın olarak yetiştirilen 14 adet çeltik çeşidi 6 farklı lokasyondan çiftçi ve tohumluk firmalarından elde edilmiştir. Bu tohumlara ait 38 adet tohum lotunda standart çimlenme, elektriksel iletkenlik (EC), 10 adet hızlandırılmış yaşlanma test koşulu (41ºC 48/72, 42ºC 48/72, 43ºC 48/72, 44ºC 48/72, 45ºC 48/72 s) ve tarla çıkış testleri uygulanarak vigor testleri ile tarla çıkış testi arasında korelasyon analizleri yapılmıştır.

Araştırma Bulguları: Türkiye’de yaygın olarak kullanılan çeltik çeşitlerinde tohum depolama ve tarla çıkış potansiyelinin belirlenmesinde hızlandırılmış yaşlanma testinin vigor testi olarak kullanılabileceği ve 44ºC 72 s koşulunun tarla çıkış testi ile yüksek korelasyon (r=0.984**) gösterdiği belirlenmiştir.

Sonuç: Tohum test laboratuvarlarında çeltik tohumları için standart çimlenme testinin yanı sıra vigor testi olarak hızlandırılmış yaşlanma testinin 44ºC 72 s koşulunda yapılabileceği tespit edilmiştir.
THE log(ft) VALUES IN SPHERICAL AND DEFORMED NUCLEI FOR SOME ODD-A GERMANIUM ISOTOPES
Authors: ÇAKMAK Şadiye
Published: December 2021

The log(ft) values of the allowed 𝛽± decay between odd-A spherical and deformed nuclei are studied for germanium isotopes in this paper. The Pyatov Method (PM) and the Schematic Model (SM)) are used to the GT strength distributions, including the schematic residual spin-isospin interaction between nucleons in the particle-hole and particle-particle channels. Particle-hole and particle-particle interaction parameters are calculated respectively with X_ph^GT= 5.2 A^(0.7 ) MeV and X_pp^GT= 0.58 A^(0.7 ) MeV. Deformed Woods-Saxon potential is used in calculations of single-particle energies and wave functions. The results are also compared with previous experiment values wherever available.
AN APPLICATION OF CLIFFORD ALGEBRA ON THE SEMI-SYMMETRICAL ARCHIMEDEAN SOLID TRUNCATED ICOSAHEDRON
Authors: ÇAKMAK Şadiye
Published: December 2021

Mathematical systems are needed to explain and prove the concepts in physics. This could be in algebra. Various algebras have been introduced and discussed by physicists and mathematicians throughout history. In this work, one of them, Clifford algebra, or in other words geometric algebra, is discussed and its application in physics is examined. Today, Clifford algebra provides convenience in many fields. It is frequently used in application areas such as robotics, quantum mechanics, and crystallography. After presenting Clifford algebra and quaternions, symmetry operations with Clifford algebra and quaternions are defined in molecular physics. Here, these symmetry operations are also applied to the fourth Archimedean solid, the truncated icosahedron. Also, the vertices of this solid presented in Cartesian coordinates are calculated.
THE IMPORTANCE OF THE DATA TAKEN FROM THE NO, NO2, AND CO SENSORS IN THE VENTILATION PROCESS IN THE RAILWAY TUNNELS
Authors: KABADAYI Uğur , BAŞARAN Murat
Published: December 2021

In railway tunnels, ventilation is carried out to prevent NO, NO2, and CO gas pollution caused by exhaust gases due to the diesel locomotives on the railway. Some ventilation calculations are used during ventilation. In these calculations, factors like the location and the structure of the tunnel and the pressure belts that may occur should be considered one by one. After these calculations, control scenarios are prepared based on the locations and dimensions of the ventilation equipment to be used. Programmable logic controllers (PLC) control these control scenarios. In this system, data is needed for the devices to work efficiently and correctly. These data are obtained in real-time through sensors. These are NO, NO2, and CO sensors that measure toxic gases. The information received from the sensors provides the necessary information to start, continue, stop or switch to other scenarios. These sensors are needed to provide data required to operate jet fans and axial fans to ventilate the tunnels. This article describes the location of sensors and programmable logic controllers in the ventilation process in railway tunnels.
Les religions de l’Afrique du Nord antique dans la littérature classique
Authors: Coltelloni-Trannoy Michèle
Published: December 2021

Les informations sur les piétés africaines livrées par les sources classiques pâtissent de plusieurs handicaps : le point de vue externe (grec ou romain) des témoignages puisque nous ne disposons d’aucun récit émanant d’un auteur de culture africaine ; les projets d’écriture, qui ne sont jamais centrés sur le sujet des religions ; enfin les récits sont marqués par deux biais, qui déforment les realia ou les inventent : le topos de la barbarie, particulièrement à l’encontre de Carthage punique, et la pratique de l’ interpretatio graeca et latina.
Les religions antiques en Afrique du Nord d’après les sources arabes médiévales
Authors: Benabbès Mohamed
Published: December 2021

Bien que les informations fournies par les sources arabes médiévales concernant le passé pré-islamique de l’Afrique du Nord sont souvent fort maigres et pleines de confusions et d’amalgames, l’image qu’elles fournissent de la situation religieuse de l’Afrique du Nord au VIIe siècle n’est pas assez éloignée de celle que nous donne la documentation classique gréco-latine. Si la majorité absolue de la population africo-romaine était christianisée, le monde tribal africain était, quant à lui, partagé entre ceux qui ont adopté la religion chrétienne et ceux qui ont conservé leur polythéisme traditionnel. Au moment de leur invasion au VIIe siècle, les Musulmans ne semblent pas avoir accordé une grande importance aux attitudes religieuses des peuples conquis. La ligne de démarcation était entre ceux qui acceptent de se soumettre aux nouveaux maitres et ceux qui s’en opposent. Les tribus christianisées, liées par des traités d’alliances avec le pouvoir romain, ont brandi l’étendard de la résistance. Les tribus païennes, déjà en lutte ouverte contre le régime en place, n’avaient pas un seul mot d’ordre. Ceux qui se sont soumis, comme les Lawāta et bien d’autres, correspondent mal au cadrage juridique tardif conçu par les fuqaha du IXe siècle pour le statut des dhimmi. C’est seulement pour les y ajuster, qu’on leur appliqua l’épithète maǧūs, dénudé de toutes ces connotations primitives en rapport avec le zoroastrisme perse.
À propos des aṣnām au Maghreb médiéval
Authors: Mkacher Anis
Published: December 2021

L’intégration de la région nord-africaine au sein de l’Empire musulman fut l’occasion pour de nombreux historiens, géographes et autres spécialistes de s’intéresser à la contrée, de recréer une histoire de sa conquête et par la suite de dresser un tableau plus large, qui englobe divers aspects comme la société ou l’économie de la région. Leurs écrits constituent donc des sources majeures pour mieux comprendre le contexte de la conquête. Dans le présent travail, nous avons rassemblé des témoignages issus des récits arabes sur la présence matérielle du paganisme dans la région nord-africaine. Ainsi, à partir de l’étude de la notion de «ṣanam / aṣnām», deux grands axes sont développés, d’une part les vestiges matériels et d’autre part la toponymie comme souvenir d’un passé païen.
La religion de l’Afrique ancienne vue par les voyageurs européens d’époque moderne
Authors: González Bordas Hernán
Published: December 2021

Cette étude se consacre à l’histoire de l’intérêt pour la religion ancienne d’Afrique dans l’époque moderne. À travers l’analyse d’auteurs choisis, répartis en trois périodes – la première et la deuxième moitié du XVIIe siècle, ainsi que la première moitié du XVIIIe – nous avons suivi l’évolution des aproches en matière d’Antiquité, en général, et de religión antique, en particulier. Les mises en contexte de la conjoncture politique et intellectuelle de chaque période, ainsi que les circonstances particulières propres à chaque voyageur permettent de comprendre les curiosités qu’ils ont relevées, leurs omissions, ainsi que leurs usages de la religion Antique d’Afrique.
Aux origines de l’histoire des religions en Afrique du Nord ancienne
Authors: Kaabia Ridha
Published: December 2021

Médecin de formation converti à l’anthropologie physique, Lucien Bertholon est le premier auteur d’un essai sur les religions des Libyens anciens. Agent actif de la colonisation de la Tunisie et adepte du courant diffusionniste, il attribue à une bonne partie des Libyens anciens, à leur culture et à leurs cultes une origine extra africaine ; tous ces éléments seraient une importation provenant d’un foyer d’origine, la région égéenne. L’arrivée en terre libyenne était, pour ces immigrés, synonyme de stagnation et d’immobilisme. C’est la colonisation française du Maghreb qui a permis à la fois de découvrir ‘l’archaïsme prolongé’ de ces populations et d’établir une analogie entre certaines de leurs pratiques culturelles contemporaines et des croyances de leurs ancêtres. Son recours à l’anthropologie physique et à l’ethnologie, sa méthode analogique et son approche diffusionniste lui ont permis de parvenir à des conclusions qui ne manquent certes pas d’originalité, mais qui n’ont toutefois pas trouvé d’écho dans les travaux des historiens des religions de l’Afrique ancienne.
Paul Gauckler et les recherches sur la religion de la Tunisie antique
Authors: Ben Romdhane Hamden
Published: December 2021

Paul Gauckler est l’initiateur des premiers et grands projets d’inventaire et de recherche qui ont marqué le passage de la recherche de l’oeuvre d’art à la documentation scientifique rigoureuse. Son projet sur les monuments historiques, et notamment le volume publié sur les temples «païens», témoigne de cette prise de conscience. Ses études personnelles sur les basiliques chrétiennes, couronnées par une publication posthume, constituent l’aboutissement de sa carrière brillante d’archéologue qui a posé les bases solides du Service des Antiquités et des Arts de Tunisie.
EVALUATION OF VOICE TRANSMISSION QUALITY IN THE LTE NETWORKS
Authors: Vetoshko Ivan , Noskov Vyacheslav
Published: December 2021

Background. LTE mobile networks combine packet network technology and radio technology. Parameters of packet and radio subsystems significantly affects the quality of all traffic types transmission, especially telephone traffic, as the most demanding to such parameters of network transmission as delay, jitter and packet loss rate. The recommendations of the International Telecommunication Union and the documents of the partner organization of telecommunications operators (3GPP) contain hypothetical reference models, targets for end-to-end connection quality, and lists the factors that affect the quality (QoS) of VoLTE services. In addition, the network points are shown where you need to measure the quality of telephone traffic and tools for quality assessment. The quality of telephony services is assessed according to the E-model using the method of determining the mean opinion score (MOS). However, this technique is intended primarily to determine the MOS during the network planning. To calculate the MOS in a working network, you have to measure such network performance first such as voice delay and packet loss rate. This article presents the method of calculating MOS in the LTE network based on the E-model and presents the results of practical quality studies.

Objective. The purpose of this article is research the impact of delay and packet loss ratio and voice codec characteristics in the real LTE network on quality of telephone services.

Methods. Analysis of factors affecting on telephone services quality and analysis MOS assessment methods. Practical studies of the delay and packet loss ratio affect the MOS level in various conditions of radio coverage and network load.

Results. Practical results of delay and packet loss ratio influence on the telephone services quality in the LTE network. Calculated MOS based on the practically measured delay and packet loss ratio.

Conclusions. The combination of packet technologies, modern AMR-WB codecs and QoS support mechanisms in the LTE networks provides high quality perception of voice messages at the level of not less than 4 on the MOS scale. With a delay not exceeding 180 ms, a sufficiently high quality of voice transmission is ensured (MOS ≈ 4). VoLTE technology using the AMR-WB codec is quite resistant to packet loss and provides high quality perception of voice messages at a packet loss ratio of up to 1%.
DEVELOPMENT OF METHODS OF POSITIONING, LOCALIZATION AND DATA COLLECTION FROM NODES OF A FREE MOBILE SENSOR NETWORK USING INTELLIGENT ADAPTIVE TELECOMMUNICATION AEROPLATFORMS
Authors: Romaniuk Valery , Lysenko Olexandr , Novikov Valery , Sushyn Ihor
Published: December 2021

Background. The article presents the results of a study of methods of positioning, localization and data collection from nodes of a mobile wireless sensor network using intelligent adaptive telecommunication air platforms. To implement the study of this research topic, an analysis of literary sources on this topic was carried out. Based on a fairly rich bibliographic material, this work has the main task of examining, analyzing and systematizing already known approaches to positioning objects in wireless sensor networks using intelligent adaptive telecommunication air platforms and suggesting options for their development.

Objective. The aim of the work is to improve the methods of direct data collection of TA from the nodes of BSM, the general directions of synthesis of which are defined in the work.

Methods. Methods of cluster analysis (network clustering), graph theory (research of analytical models of BSM with TA functioning, construction of cluster topology), theory of telecommunication networks (when calculating bandwidth in BSM with TA radio channels) and theory were used to solve the formulated problem. (when developing a positioning model for telecommunications air platforms)

Results. A technique for evaluating the effectiveness of methods for collecting data from wireless sensor networks using intelligent adaptive telecommunication air platforms is proposed.

Conclusions. The method of collecting TA monitoring data from the main nodes of clustered BSM has been improved. The method of estimation of efficiency of methods of data collection with BSM by telecommunication air platforms is offered.
Control the Frequency Response of a Loudspeaker by Changing Its Enclosure
Authors: Riabokon Pavlo Olehovych
Published: December 2021

This article analyzes how to control frequency response of a loudspeaker by changing the volume of its closed-box enclosure. The calculation is performed by the method of  Thiele-Small on the basic of a pre-calculated loudspeaker, the parameters of which are given in third section. This became possible because of the simplification of the circuit on figure 1 to the form of circuit on figure 2. This allowed us to consider it as a second order filter (presence of two reactive elements). Obtained results are compared with corresponding characteristics of open-box enclosure of the same loudspeaker, that was pre-calculated by the author too. Results are presented graphically in figure 3 and 4. As can be seen from them, the resonant frequency of the loudspeaker in the closed-box enclosure is higher than the resonant frequency of the loudspeaker in the open box. The result in the form of a ratio  is listed in table 2. Analyzing the obtained data, it can be noticed that with the change of the internal volume of the closed box (and hence its total quality factor), it is possible to affect both the resonance frequency and the peak amplitude values in these frequencies by changing the FR. The result shown in figure 3 and 4 is achieved by taking into account effect of radiation only on the one side of the driver (in the case of open-box enclosure). Closed box was calculating by taking into account both sides radiation of the driver.
Shifting the resonance frequency of the system towards higher frequencies and increasing the sound pressure on the resonance generally worsens the FR of the loudspeaker (reduces the reproduction of low-frequency components of sound and increases the unevenness of the frequency). However, certain variants of this group of frequency characteristics may be useful depending on the reproducible frequency range and need of emphasize the low-frequency components (for example, in rock music). If you need a smoothed low-frequency sound, it is appropriate to use systems with low overall quality and increased internal volume or open-box enclosure.
Therefore, the volume of the closed-box enclosure significantly affects the resonant frequency and the shape of the frequency response of the loudspeaker. Reducing the volume of the enclosure of the loudspeaker leads to a decrease in its frequency range due to low frequencies and at the same time increase in the unevenness of the frequency response. The change in the resonant frequency of the system as the volume of the closed-box enclosure decreases, the less the volume of the closed-box.
Analysis of Directional Properties of Angular Horn Antenna
Authors: Shyshkova Kateryna Andriivma
Published: December 2021

In this paper, horn antennas are considered to belong to the class of aperture antennas which usually include a sound wave reflector and an electroacoustic transducer. For the variant of technical implementation of the electroacoustic transducer in the form of a corner antenna, the problem of sound emission by such an antenna is solved . taking into account the repeated reflection of emitted sound waves from the antenna design elements. The study of the acoustic properties of such an antenna was carried out taking into account a number of assumptions. 'what material, the thickness of the walls of the mouthpiece is infinitesimal. These conditions are supplemented by the known conditions of radiation at infinity. All the above assumptions make it possible to greatly simplify the solution of the problem of sound radiation by an angular horn antenna.
To do this, the Helmholtz equation under boundary conditions was solved by the method of connected fields in multiconnected domains, corresponding to the physical model of the antenna. The radiation field of such an antenna is presented in the form of three partial regions, which in turn, according to the method of partial regions - in the form of Fourier series expansions, the coefficients of which are determined by solving differential equations describing piezoceramic transducer oscillations and wave processes. in acoustic environments in contact with it. The solution of the Helmholtz equation is reduced to the solution of an infinite system of linear algebraic equations taking into account the above assumptions, as well as the conditions of field continuity at the boundary of partial domains, we obtain an infinite system of linear algebraic equations. Based on the system, an approximate expression for the normalized radiation pattern is obtained.
Studying the features of the directional properties of the angular antenna by direct analysis of the expression is not possible. Therefore, such a study was carried out on the basis of calculated directivity diagrams obtained using a computer for a wide range of wave sizes and geometrical characteristics of the angular antenna. cylindrical electroacoustic transducers. In all calculations, a uniform distribution of the oscillating velocity on the surface of the emitter was chosen
Analyzing the obtained data, there is a pronounced dependence of the shape of the pattern on the magnitude of the wave size of the speaker. This is manifested in the fact that the main petal splits into two or even three petals, as well as in increasing the overall sharpness of the pattern.
A Literary Exploration of Existential Feminism in the Novella The Moon Opera Through the Application of Intertextuality Theory
Authors: Yan Ruixi
Published: December 2021

Second-wave feminism was a period of feminist activity that began in the early 1960s in the western world, which focused on criticizing the patriarchal institutions or cultural practices throughout the society. Originating several centuries earlier, Chinese opera culture has been ahead of its time in demonstrating the male-dominated society’s oppression against women. As one of the principal founders of second-wave feminism, Simone de Beauvoir’s classical feminist theory in her book, The Second Sex, mainly introduced the sex-gender distinction. In this article, the author aims to reveal how Bi Feiyu, the writer of The Moon Opera, successfully conveyed existential feminist ideas, especially Beauvoir’s famous assertion that "one is not born but becomes a woman", through his careful selection of the art type Qing Yi (Qingyi is the main woman role in Peking Opera and often plays dignified, serious, and decent characters, which are mostly wives or mothers undergoing severe ordeal) and the portrayal of two generations of Qing Yi performers. In the process of analysis, the author not only examined Bi Feiyu’s application of intertextuality theory, but also derived conclusions from other mainstream feminist thoughts such as the feminist theory of the dressed female body and the transactional sex theory.
Keefektifan Model Problem Based Learning Berbantuan Video dalam Liveworksheets Terhadap Kemampuan Pemecahan Masalah Matematis Siswa
Authors: Haqiqi Arghob Khofya , Syarifa Sabila Nurus
Published: December 2021

Penelitian ini dilatarbelakangi karena rendahnya kemampuan siswa dalam memecahkan masalah dalam pembelajaran matematika. Oleh karena itu, untuk mengatasi masalah tersebut dilakukan penelitian dengan model Problem-Based Learning (PBL) berbantuan video dalam liveworksheets. Penelitian ini menggunakan metode eksperimen kuasi dengan desain penelitian pretest-posttest control group design. Populasi dalam penelitian ini terdiri dari kelas X TKR 1 - X TKR 3 pada salah satu Sekolah Menengah Kejuruan (SMK) di Kudus. Pemilihan sampel menggunakan teknik cluster random sampling didapatkan kelas X TKR 2 sebagai kelas eksperimen dan X TKR 3 sebagai kelas kontrol. Hasil pelaksanaan pembelajaran kelas eksperimen yang dimulai dengan pemberian masalah menunjukkan adanya peningkatan kemampuan pemecahan masalah matematis. Selain itu uji N gain menunjukkan peningkatan skor kelas eksperimen sebesar 63%, sedang kelas kontrol sebesar 49%. Berdasarkan pelaksanaan dan hasil analisis maka dapat disimpulkan model problem-based learning berbantuan video dalam liveworksheets efektif dengan kategori sedang.Temuan ini mengindikasikan bahwa model PBL berbantuan video dalam liveworksheets dapat dijadikan alternatif model pembelajaran untuk mengembangkan kemampuan pemecahan masalah matematis siswa.

 

This research is motivated by the low ability of students to solve problems in learning mathematics. Therefore, to overcome this problem, research was carried out using a video-assisted Problem-Based Learning (PBL) model in live worksheets. This study uses a quasi-experimental method with a pretest-posttest control group design. The population in this study consisted of class X TKR 1 - X TKR 3 at one of the Vocational High Schools in Kudus. The sample selection using cluster random sampling technique obtained class X TKR 2 as the experimental class and X TKR 3 as the control class. The results of the implementation of the experimental class learning which began with giving problems showed an increase in mathematical problem-solving abilities. In addition, the N-gain test showed an increase in the score of the experimental class by 63% while the control class was 49%. Based on the results of the implementation and analysis, it can be concluded that the video-assisted problem-based learning model on student worksheets is effective in the medium category. These findings indicate that the video-assisted PBL model in live worksheets can be used as an alternative learning model to develop students' mathematical problem-solving abilities.
Prioritizing COVID-19 Contact Tracing During a Surge Using Chatbot Technology
Authors: Johnson Brady D. , Shui Meg Wall , Said Kiana , Chavez Alejandro , Sachdev Darpun D.
Published: December 2021

When COVID-19 cases surge, identifying ways to improve the efficiency of contact tracing and prioritize vulnerable communities for isolation and quarantine support services is critical. During a fall 2020 COVID-19 resurgence in San Francisco, California, prioritization of telephone-based case investigation by zip code and using a chatbot to screen for case participants who needed isolation support reduced the number of case participants who would have been assigned for a telephone interview by 31.5% and likely contributed to 87.5% of Latinx case participants being successfully interviewed. (Am J Public Health. 2022;112(1):43–47. https://doi.org/10.2105/AJPH.2021.306563 )
Adherence to Social-Distancing and Personal Hygiene Behavior Guidelines and Risk of COVID-19 Diagnosis: Evidence From the Understanding America Study
Authors: Andrasfay Theresa , Wu Qiao , Lee Haena , Crimmins Eileen M.
Published: December 2021

Objectives. To assess the association between individual-level adherence to social-distancing and personal hygiene behaviors recommended by public health experts and subsequent risk of COVID-19 diagnosis in the United States.

Methods. Data are from waves 7 through 26 (June 10, 2020–April 26, 2021) of the Understanding America Study COVID-19 survey. We used Cox models to assess the relationship between engaging in behaviors considered high risk and risk of COVID-19 diagnosis.

Results. Individuals engaging in behaviors indicating lack of adherence to social-distancing guidelines, especially those related to large gatherings or public interactions, had a significantly higher risk of COVID-19 diagnosis than did those who did not engage in these behaviors. Each additional risk behavior was associated with a 9% higher risk of COVID-19 diagnosis (hazard ratio [HR] = 1.09; 95% confidence interval [CI] = 1.05, 1.13). Results were similar after adjustment for sociodemographic characteristics and local infection rates.

Conclusions. Personal mitigation behaviors appear to influence the risk of COVID-19, even in the presence of social factors related to infection risk.

Public Health Implications. Our findings emphasize the importance of individual behaviors for preventing COVID-19, which may be relevant in contexts with low vaccination. (Am J Public Health. 2022;112(1):169–178. https://doi.org/10.2105/AJPH.2021.306565 )
El comercio del carbón vegetal y su transitar hacia la bioeconomía en México
Authors: Castellanos-Potenciano Blanca Patricia , Carrillo Ávila Noel , Hernández Hernández Adán
Published: December 2021

El consumo de carbón vegetal a nivel global se ha incrementado entre un 3 y 4% de forma anual en los últimos años. Su uso en México, es un factor socio-cultural por lo que su consumo podría llegar hasta las 700 mil toneladas cada año, con una perspectiva de crecimiento de 360 mil toneladas al 2030, lo que implicaría disponer de más de dos millones de metros cúbicos de madera para tal fin. En general, no existe un proceso estandarizado para la producción de carbón vegetal para una calidad homogénea, su elaboración se realiza de manera artesanal con diferentes especies forestales y en hornos de tierra rudimentarios, con técnicas que no brindan altos rendimientos. Además, su comercialización está llena de opacidades que limitan cuantificar los verdaderos volúmenes que se comercializan. Así, la elaboración y comercialización del carbón podría constituir una amenaza para el futuro de los recursos maderables. Dada esta problemática, el objetivo del texto es plantear la situación problemática que se observa entorno al comercio del carbón en México y expone la necesidad de investigación que permita transitar en la economía circular a través del manejo sustentable, por medio de una conversión energética alta (más carbón con menos madera), plantaciones exprofeso y el uso eficiente de residuos para fines energéticos, con estrategias tecnológicas que mitiguen los impactos ambientales negativos.
FACTORS AFFECTING THE HELP-SEEKING BEHAVIOUR OF BLACK ASIAN MINORITY ETHNIC (BAME) GROUPS FOR MENTAL HEALTH SERVICES IN THE UK: A LITERATURE REVIEW
Authors: Jacobs Lucy , Pentaris Panagiotis
Published: December 2021

Background: There are numerous reports from government publications, mental health charities, the World Health Organisation and array of journal articles all writing about mental health issues in relation to Black, Asian, and Minority Ethnic (BAME). It appears to have become common knowledge that there are disparities in the treatment received by BAME individuals from mental health services. It also commonly reported that BAME individuals are more likely to access mental services via adverse routes, this prognosis is said to worsen in the case of Black males. Aims: This review aims to explore what factors influence BAME individuals’ help-seeking behaviour for mental health services in the UK. It also explores why BAME individuals access mental health services at certain entry points. Methodology: This is a systematic literature review of 16 peer-reviewed journal articles reporting on data from UK-based studies, with a critical analysis in a thematic style. Findings: The help-seeking behaviours of participants in the studies are strongly determined by the values and beliefs they hold, which are deeply steeped in their culture. BAME individuals report that mental health professionals do not understand nor seek to understand their religious and cultural views on mental illnesses. Also, the impact of internalised and external stigma instigates secrecy whereby individuals hide their symptoms from professional mental health services and even from their extended family members. Conclusion: Culture plays a major role and impacts directly on peoples’ help-seeking behaviours. Individuals from BAME background tend to seek support from extended family members for physical illnesses but often hide their mental symptoms.
Child Neglect: Statutes, Rates, and a Neglect Diversion Model
Authors: DeGuerre Kristcha , Strolin-Goltzman Jessica , Briar-Lawson Katharine , Gooley Brenda
Published: December 2021

Introduction: Poverty is a correlate if not a cause of child neglect in the US and worldwide (Slack, 2017; WHO & UNICEF,2021,UN 2021). Definitions of child neglect vary widely and include parental omissions and commissions. The purpose of this manuscript is to examine the extent to which poverty exemptions in state statutes (N=15) actually are correlated with “screened out” neglect cases. We then undertake a case study of Vermont, the state in the U.S. with the lowest rate of screened in neglect cases, to explore the extent that the state of Vermont can be seen as a “positive outlier.” Methods: Using a multi-phase analysis, this article examines US state statutes (2019). Focusing on the 14 states that use poverty and service access qualifiers in their neglect statutes, we compare their neglect rates with states that do not include such qualifiers. We hypothesized that states with poverty exemptions in their statutes would have proportionately fewer neglect cases. The second phase of analysis built off of key informant interviews to help explain findings from phase 1. Findings: The findings expose the wide variation in neglect percentages across the nation, ranging from 92.2% to 1.5%. Using Vermont as a case study, with the lowest reported neglect rate and only 18 cases screened in for investigation in 2019, we examine explanations for the wide discrepancies nationally. These include the use of an economic firewall with poverty related cases in Vermont being referred to economic support services instead of a CPS investigation, Family Resource Centers, and Differential Response Systems. Implications and Conclusions: Differentiating child neglect from poverty, creating a national if not a globally standardized definition of neglect could help to better contextualize neglect rates, create poverty related diversion programs, and address race equity agendas. Finally, we offer recommendations to create more innovative practices to address and divert neglect cases to other systems and services that can more appropriately aid children, parents, and whole families.
Finite Volume Simulations of Particle-laden Viscoelastic Fluid Flows: Application To Hydraulic Fracture Processes
Authors: Fernandes C. , Faroughi S. A. , Ribeiro R. , Isabel A. , McKinley G. H.
Published: December 2021

Accurately resolving the coupled momentum transfer between the liquid and solid phases of complex fluids is a fundamental problem in multiphase transport processes, such as hydraulic fracture operations. Specifically we need to characterize the dependence of the normalized average fluid-particle force < F > on the volume fraction of the dispersed solid phase and on the rheology of the complex fluid matrix, parameterized through the Weissenberg number Wi measuring the relative magnitude of elastic to viscous stresses in the fluid. Here we use direct numerical simulations (DNS) to study the creeping flow (Re << 1) of viscoelastic fluids through static random arrays of monodisperse spherical particles using a finite volume Navier-Stokes/Cauchy momentum solver. The numerical study consists of N = 150 different systems, in which the normalized average fluid-particle force  is obtained as a function of the volume fraction φ (0 < φ ≤ 0.2) of the dispersed solid phase and the Weissenberg number Wi (0 ≤ Wi ≤ 4). From these predictions a closure law < F >( Wi,φ ) for the drag force is derived for the quasi-linear Oldroyd-B viscoelastic fluid model (with fixed retardation ratio β = 0.5) which is, on average, within 5.7% of the DNS results. Additionally, a flow solver able to couple Eulerian and Lagrangian phases (in which the particulate phase is modeled by the discrete particle method (DPM)) is developed, which incorporates the viscoelastic nature of the continuum phase and the closed-form drag law. Two case studies were simulated using this solver, in order to assess the accuracy and robustness of the newly-developed approach for handling particle-laden viscoelastic flow configurations with O (10 5 − 10 6 ) rigid spheres that are representative of hydraulic fracture operations. Three-dimensional settling processes in a Newtonian fluid and in a quasi-linear Oldroyd-B viscoelastic fluid are both investigated using a rectangular channel and an annular pipe domain. Good agreement is obtained for the particle distribution measured in a Newtonian fluid, when comparing numerical results with experimental data. For the cases in which the continuous fluid phase is viscoelastic we compute the evolution in the velocity fields and predicted particle distributions are presented at different elasticity numbers 0 ≤ El ≤ 30 (where El = Wi/Re ) and for different suspension particle volume fractions.
Development and Validation of a Competency-Based Education Model Suitable for Undergraduate Human Nutrition and Dietetics Training in Uganda: A Modified Delphi Process
Authors: Kikomeko Peterson Kato , Ochola Sophie , Kaaya Archileo N. , Ogada Irene , Birungi Tracy Lukiya , Nakitto Peace
Published: December 2021

Background

Competency-based education (CBE) equips health professionals with the requisite competencies for health systems performance. This study aimed to develop and validate a CBE model suitable for teaching Human Nutrition/Human Nutrition and Dietetics (HN/HND) at the undergraduate level in Uganda.
Methods

The study was undertaken in two main phases, (1) competency needs assessment and (2) model development and content validation. The later had three iterative stages: a needs assessment results validation workshop; an expert focus group discussion to develop a draft CBE model framework; and consensus development-itself undertaken in two modified Delphi rounds to ascertain participant consensus on the relevance and suitability of the competency domains, subdomains, and statements comprised in the developed draft CBE framework for undergraduate HN/HND training in Uganda. In the modified Delphi process, participants indicated the degree to which they agreed or disagreed with each of the given statements on five-point Likert-type items of strongly disagree, disagree, neither agree nor disagree, agree, and strongly agree as well as the level of training they recommended the given competency statement to be learned. The workshop had 31 participants, the focus group eight, while the first and second Delphi rounds had 70 and 55 participants respectively.
Results

In total, seven competency domains, 24 subdomains, and 190 competency statements were developed. Content analysis and analysis of percentage responses for each competency statement were done with participant consensus set at ≥80%. All the seven domains (100%); 22 (91.7%) of the 24 subdomains; and 153 (87.9%) of the 174 analysed competency statements were evaluated as both relevant and suitable for undergraduate HN/HND training and hence included in the validated CBE model.
Conclusion

This study evaluated the relevancy and suitability of seven competency domains prevention and management of malnutrition; nutrition in the lifecycle; food security, food safety, agriculture, and livelihoods promotion; ethics and professionalism in nutrition and dietetics; research and data analysis; policy, advocacy, and social and behaviour change communication; and nutrition leadership and management for undergraduate HN/HND training in Uganda. The study recommends translating the developed CBE model into a standard curriculum that can be taught and evaluated.
MPPT Based On Artificial Neural Networks (ANN) For a Photovoltaic System Under Unstable Environmental Conditions
Authors: Nkounhawa Pascal Kuate , Ndapeu Dieunedort , Kenmeugne Bienvenu
Published: December 2021

In this article, an artificial neural networks (ANN) based maximum power point tracking controller (MPPT) was developed to improve the performance of the FL-M-160W solar panel under unstable environmental conditions. To develop and configure the neural controller, a database resulting from experimental tests was built for the training of the proposed model. Then the model was tested and validated under the Matlab / Simulink environment. The optimum voltage obtained at the output of the neural controller is compared to the voltage of the photovoltaic generator and the error is used to modify the duty cycle of the DC-DC boost converter. It is shown after simulations that unlike conventional controllers which are very slow, the neural MPPT controller offers more stable, more accurate output characteristics with very low response time and very low oscillations around the operating point both in transient and steady state, even under varying environmental conditions.