bluuebunny/crossref_metadata_2025 huggingface dataset:
Consumo de polen por sírfidos (Diptera: Syrphidae) en una cuenca urbana altoandina con influencia antrópica
Authors: Angel Villarreal Sergio Leonardo , Montoya Giraldo Augusto León , Bogotá Ángel Raúl Giovanni
Published: March 2024

Las moscas de las flores son polinizadores fundamentales en hábitats de alta montaña como el bosque altoandino. Se evaluó la relación Sírfido-planta asociada al consumo de polen en tres coberturas vegetales de una microcuenca cercana a Bogotá. El polen consumido por 358 sírfidos fue extraido tras la disección de su tracto digestivo, y posteriormente acetolizado y montado. Se analizaron 300 granos de polen por sírfido y se categorizaron según su tamaño y ornamentación. Para caracterizar las relación Sírfido-planta se emplearon redes de interacción bipartitas que muestran el grado de especialización, conectancia y anidamiento de cada red-cobertura. Las relaciones de los Sírfidos en las coberturas estudiadas se mostraron generalistas, se encontró mayor vulnerabilidad y menor estabilidad de la red bipartita del Tejido Urbano discontinúo en contraste con respectiva del Bosque Ripario, lo que indica mayor resiliencia de coberturas antropizadas ante eventos de extinción.
GÖRSEL ZEKANIN SANAT VE TASARIMLA SINIRSIZ ETKİLEŞİMİ
Authors: KELEKCI OLGUN Merva
Published: March 2024

Sanatın işlevselliği ve sanat yoluyla öğrenme sürecinde görsel öğrenme duyusunun aktif hale gelmesi, gözlem yoluyla öğrenmenin bilişsel bir sürece dönüşmesine katkı sağlar. İnsanların deneyimlerden elde ettikleri bilgiyi kullanarak yeni yapısal formlar oluşturması, imgelerin ve imgelemin yeni yorumlar getirmesine olanak tanır. Bu çerçevede, sanat gerçekliğin sınırlarını aşarak yeni görsel imgelerin oluşumunda hayal gücünü ön plana çıkarır. Görsel oluşumların hayal gücüyle desteklenerek tasarlanması, yapıcı keşiflerin rasyonel sınırların ortadan kaldırılmasıyla serbest kalmasına olanak tanır. Bireyler, görsel bir görüntü yaratmak için farklı yöntemleri deneyimleyip keşfederken hayal güçlerinden yararlanır. Bir görseli manipüle ederek yeni bir estetik kazandırmak için nesneyi hayal gücüyle yeniden tanımlayarak ve tasarlamak mümkündür. Görsel zekanın tasarıma olan etkisi, kültürel değerlerle bağlantılıdır ve duyusal bilgiler dokunsal, işitsel, görsel ve koku gibi farklı duyular arasında bütünleşik bir şekilde ilişkilendirilebilir. Reklam alanında markaların tüketicilerin dikkatini çekmek için kullandığı sanal artırılmış gerçeklik uygulamaları, pazarlama stratejilerinde önemli bir rol oynamaktadır. Bu çalışmanın temel amacı, yenilikçi görsel tasarımın tüketici davranışları üzerindeki etkilerini incelemek ve bu tasarımların tüketicilerle etkileşim biçimini değiştirerek yaşamlarını kolaylaştırma potansiyelini araştırmaktır. Araştırma, teknolojik yeniliklerin sınırsız etkileşimini belirleyerek, bu etkileşimlerin tüketici yaşam tarzlarına olan etkilerini anlamayı hedeflemektedir. Ayrıca, bu çalışma pazarlamacılara, tasarımcılara ve iş stratejistlerine daha etkili ve kullanıcı dostu ürün ve hizmetler geliştirme konusunda rehberlik sağlamayı amaçlamaktadır. Nicel araştırmalara dayanan bir yöntem kullanılarak, literatür taraması, temel kavramların belirlenmesi ve analiz süreçlerini içeren bir araştırma yöntemi benimsenmiştir. Bu çalışmada, sanat ve tasarımın görsel zeka becerilerini kullanarak duygusal ve estetik bir etki yaratmak için farklı tasarım öğelerini bir araya getirerek hazırladığı etkileşimli alanların deneyimi incelenmiştir. Bu deneyimi yaşayanlar üzerinde arttırılmış gerçeklik uygulaması için sorular geliştirilmiştir. Ayrıca, görsel zekanın sanat ve tasarımla olan sınırsız etkileşimi ve gelişimine nasıl katkı sağladığı da incelenmiştir. Elde edilen veriler, görsel tasarımın tüketicilerle etkileşimde bulunma biçimini anlamak adına kapsamlı bir bakış sunacaktır.
BRITISH AIRWAYS’TEN NIKE’A: REKLAMDA YÜZ İMGESİ VE BİR DÜNYA YAPMAK
Authors: AYTEKİN Nihan
Published: March 2024

British Airways'in 1989 tarihli Globe (Face) reklamı (HudsonFilmLtd, 2012) ve Nike’ın 2018 tarihli Dream Crazy reklamlarını (Franck, 2018; Kemp, 2022) örnek olarak seçerek bu reklamlar üzerinden bir anlatı analizi ve söylem çözümlemesi gerçekleştiren bu çalışma; reklamda yüz imgesinin ardına düşen estetik kaygılara politik, ekonomik, sosyal ve kültürel olarak eşlik eden anlamları ortaya koymaya odaklanmıştır. Bu iki tarihi kampanyada yüz, Goodman’dan (1978) yola çıkarak söylersek, bir dünya yapan yüz; birleştiren ve ayrıştıran, inşa eden ve bozan, sınırlardan taşarak özgürleşen ama aynı zamanda yersizyurtsuzlaşandır. Deleuze ve Guattari'nin yüzsellik ile ilişkili olarak bahsettiği beyaz duvar ve siyah delikler (Holland, 2013, s. 92); mal, hizmet ve paranın dünya üzerinde hızla dolaşımını kolaylaştıran ulaşım sektörünü temsilen British Airways markasının reklam anlatısı üzerinden değerlendirilebilir. Bu reklamda uçsuz bucaksız bir zemin üzerinde, doğanın içinde tek tek organlardan -ağız, kulak, burun- oluştuğunu yukarıdan geniş açı ile gördüğümüz, idaresi yukarıdan bakan bir göz ve güç gerektiren ancak tamamlandığında gülümser ifadesi ve göz kırpışıyla tekinsiz, iki boyutlu, adeta despotik bir yüz doğar. Black Lives Matters hareketini ardına alan Colin Kaepernick de Nike açıkhava reklamında, tek başına yüzüyle adeta ölüme meydan okuyan, siyahi bir Amerikan vatandaşı olarak, ifadesiz bir şekilde tam karşıya bakar. Bu bağlamda marka “öteki”ni sadece yüzü açıkta kalacak biçimde eritir, Miyazaki’nin No-Face karakteri gibi sadece yüzden kurulu, her şeyi yutsa da yüzü sabit kalan bir canlıya, işler halde bir makineye dönüştürür. Sonuç olarak her iki kampanya, birbirine yüz imgesi üzerinden teğet geçip farklı yörüngeleri izleyerek zamanın ruhuna uygun bir anlamlar bütünü oluşturma ve satış görevlerini başarıyla tamamlarlar.
STİLİZASYON TEKNİKLERİNİN YALINLAŞTIRMA ÜZERİNE ETKİLERİ VE UYGULAMA ÖRNEĞİ
Authors: DELEN Ali Aşur
Published: March 2024

Duygu, düşünce ve olayların çizgilerle ifadesi insanlık tarihi ile başlamıştır ve çizgisel ifadenin gücü, anlam yoğunluğundan kaynaklanmaktadır. Bir fikir ya da objenin ayrıntılarından arındırılarak yalın biçimde ortaya konması fikir ya da nesnenin algılanmasını kolaylaştırmasının yanı sıra hatırlanırlığına da katkıda bulunur. Bu nedenle grafik tasarım sanatında stilizasyondan sıklıkla yararlanılır. Stilizasyon, sanatçının deneyim ve birikimlerinden doğan fikirlerine yönelik tasarımların, yaratım süreci içinde sadeleştirilerek ortaya konmasını sağlayan teknik olarak tanımlanabilir. Stilizasyon ile amaçlanan objeyi gereksiz ayrıntılardan kurtarmak ve sadeleştirmektir. Bir obje stilize edilirken hangi ayrıntıların korunup hangilerinin kaldırılacağı sanatçının yorum gücü ile ilişkilidir. Buna bağlı olarak stilizasyon aynı zamanda bir üslüplaştırma biçimi olarak yorumlanmaktadır. Çalışma kapsamında; tam formun çıkarılması, kısmi formun çıkarılması ve aralıklı grafik sadeleştirme metotları uygulanarak bir objenin stilizasyonu gerçekleştirilmiş ve yöntemler arasındaki farklar irdelenmiştir. Stilize edilen obje orijinal hali ile kıyaslanarak yöntemlerin sadeleştirme etkinlikleri tartışmaya sunulmuştur.
Hacia el edificio de camas: análisis de la evolución de los hostels urbanos de Barcelona
Authors: De-Miguel-Pastor María , Sentieri-Omarrementería Carla
Published: March 2024

En el transcurso de las últimas décadas ha existido un crecimiento significativo de hostels turísticos en las ciudades principales del país, fenómeno que repercute a distintos niveles en las zonas en las que se instalan. El objetivo de la presente investigación es explorar y documentar el proceso de consolidación del hostel en el ámbito urbano, tanto cuantitativa como cualitativamente, a partir del análisis de una muestra de cien hostels vigentes en 2019 y localizados en el municipio de Barcelona. El artículo examina su evolución en el tiempo atendiendo a cuatro atributos: el número de establecimientos y de las plazas ofertadas, la localización, la variación de la capacidad de cada hostel y la forma de implantación en el estrato construido. Del estudio se extrae que en las últimas décadas el hostel ha pasado de ser inexistente en la ciudad a disponer de edificios específicos, lo que permite confirmar su introducción como una forma de alojamiento nueva en la ciudad, así como determinar posibles criterios de crecimiento futuro que permitan reflexionar sobre sus efectos y la necesidad de responder a la nueva situación.
Historia y evolución del entramado urbano en la época colonial, republicana y moderna en Ibagué
Authors: Guarnizo-Sanchez Néstor Andrés , Mosquera-Muñoz Sandy Angelina
Published: March 2024

El marco fundacional de la mayoría de las ciudades de Colombia tiene sus raíces en la organización territorial adoptada por la monarquía española. En el caso del municipio de Ibagué, se logran evidenciar los cambios en su estructura física que permitieron poner en contexto su leve desarrollo en la región Tolimense; desde la estructura urbana de la ciudad, se describen históricamente los periodos colonial y republicano, hasta la era moderna, destacando las diferentes argumentaciones encontradas en cada periodo. La exploración bibliográfica y cartográfica, nos permite describir temporalmente las condiciones urbanísticas de cada periodo. Para realizar este estudio del territorio se utilizó el método de análisis temporal con un enfoque cualitativo que permitió la obtención de datos descriptivos sobre el contexto urbano en los diferentes periodos históricos.
De la “Quesana” tradicional a un sistema modular de paneles aislantes de Totora
Authors: Jiménez-Dianderas Gloria Cecilia , Montoya Robles Teresa del Pilar , Loayza León Silvana
Published: March 2024

La “Totora” es una fibra natural disponible en el lago Titicaca, al sur del Perú, y de uso tradicional entre las comunidades circundantes. Actualmente existe un importante excedente, por lo que anualmente se quema una gran cantidad de totorales. Este estudio plantea el uso y la estandarización de la totora como material aislante térmico y de baja energía incorporada, para extender su uso a edificaciones en la fría región altoandina. Se realizó la exploración en campo de esta fibra natural y de cómo la trabajan las comunidades del lago, a través del intercambio tecnológico con pobladores locales. A partir de esta experiencia, y a través de pruebas básicas en gabinete, se desarrolló el panel doble cruzado y modular de totora. La transmisión térmica del panel se comprobó con pruebas de laboratorio. Se construyó un prototipo de vivienda con cerramiento de paneles de totora y estructura de madera, monitoreando su desempeño constructivo y térmico por tres meses. El resultado térmico fue mejor que el de una cabaña tradicional alto-andina. El panel de totora propuesto mantuvo su forma, rigidez y características aislantes, demostrando su potencial como material constructivo natural y de bajo impacto ambiental en su procesamiento.
Del binde al fogón industrial: arquitectura doméstica de comunidades afrodescendientes del Caribe colombiano
Authors: Cañola Hernan Darío
Published: March 2024

La conceptualización de lo que conocemos como arquitectura se origina en el descubrimiento del fuego, que resolvió la necesidad de cocinar e influyó en la evolución de las personas, incluso en su desarrollo intelectual y en el habitar en sociedad. Por tal motivo, esta investigación establece un estudio sobre la importancia del fogón y su transición como componente arquitectónico en comunidades afrodescendientes del Caribe colombiano, para lo cual hace un análisis etnográfico y ergonómico desde la adaptación del hombre a los fogones. Como resultados, se determina que el binde trasciende al fogón de banco como consecuencia de factores económicos y la mejora de posturas ligadas a la ergonomía de las antiguas cocineras, al igual que de la transición del fogón de banco al fogón industrial debido a los riesgos producidos por el uso de madera como biocombustible; todo lo cual está soportado en referentes y resultados del análisis etnográfico y entrevistas. Sin embargo, se establece que las tipologías de fogones a leña actualmente hacen parte de la tradición gastronómica, pese a los desarrollos tecnológicos ligados a los fogones industriales, presentes en comunidades rurales y urbanas de los municipios de Turbo y Necoclí.
Female in The Boardroom and Firm Performance: An Insight of Indonesia’s Firms
Authors: Ahmad Gatot Nazir , Iranto Dicky , Siregar Edo , Sebayang Dianta A.
Published: March 2024

The purpose of this research is to determine the impact of female board members on firm performance. This study employed a purposive sampling technique with a research sample comprised of 264 non-financial companies listed on the Indonesia Stock Exchange between 2013 and 2019. As proxies for the independent variable of females in the boardroom, this study examines female directors' presence, a dummy variable for female CEOs, the proportion of female directors, and female directors' business ability. The return on assets (ROA), return on equity (ROE), and Tobin's Q are all proxies for gauging corporate performance. This study's analysis technique is robust regression analysis. Female board members had the greatest influence on firm performance, according to the findings. Overall, the female CEO dummy serves as a proxy for the strength of the company's performance.
Influencia del género en el desempeño de las instituciones microfinancieras: el caso de América Latina y el Caribe
Authors: Paillacho Bolaños Lisbeth Cathiana , Palacín-Sánchez María-José , Irimia Diéguez Ana Isabel , Pérez López José Angel
Published: March 2024

El objetivo de esta investigación es determinar la influencia de la fuerza laboral femenina en el desempeño de las instituciones microfinancieras (IMF) de América Latina y el Caribe (ALCA). Partiendo de datos obtenidos en el MIX Market, se analizó la influencia de la mujer en puestos como oficiales de crédito, gerentes y consejeras, de 171 IMF en 18 países de la región durante el periodo 2010-2018, en la eficiencia, productividad, rendimiento financiero y alcance. Los resultados obtenidos muestran que las oficiales de crédito y las gerentes influyen de forma positiva en el desempeño en tanto que las consejeras lo hacen de forma negativa. No obstante, cuando se analiza la influencia de las consejeras en aquellos consejos donde tienen una participación mayoritaria, se observa un mejor desempeño. Se recomienda incrementar la presencia femenina en la fuerza laboral de las IMF, especialmente en niveles gerenciales.
Exogenous gibberellin improves the yield and quality of basil (Ocimum basilicum L.) and chervil (Anthriscus cerefolium L.) plants grown under salinity stress conditions
Authors: El haddaji Hamza , Akoudad Mustapha , Skalli Ali , Moumen Abdelmajid , Bellahcen Said , Maach Mostapha , Rahhou Abderrahmane , Baghour Mourad
Published: March 2024

Gibberellins play a crucial role as plant hormones in the regulation of various aspects of plant growth and development. They are involved in processes such as seed germination, breaking plant and bud dormancy, and counteracting the effects of auxin. Additionally, gibberellins promote leaf expansion, stimulate stem elongation, and contribute to flower development and fruit set. The objective of this study was to investigate the effects of gibberellic acid (GA3) treatments (T0: 0 ppm, T1: 1 ppm, and T2: 10 ppm) on the growth regulation and physiological parameters of basil and chervil plants under salinity stress conditions (150 mM NaCl). The study explored various growth outcomes and biochemical parameters, including chlorophyll, proteins, soluble sugars, proline, and nitrate. The results indicate that the application of gibberellic acid alleviated the adverse effects of high salinity and resulted in enhanced biomass production. In comparison to the control treatment, foliar surface values for basil and chervil increased by 15% and 35%, respectively, in T2. Moreover, root lengths of basil and chervil reached their highest values in T2, showing a 16% increase for basil and a 33% increase for chervil. Carotenoid levels were positively influenced by GA3 treatments, reaching high concentrations in T2, exceeding T0 levels by 41% for basil and 83% for chervil. Additionally, under T2 treatment, protein and glucose levels increased by factors of 2.7 and 1.7, respectively, in basil plants and by factors of 2.1 and 1.7, respectively, in chervil plants. The application of gibberellic acid led to a 33% reduction in proline content for basil and a 27% reduction for chervil compared to the T0 treatment.
Unravelling Factors Influencing the Mutually Agreed Solution in International Trade Disputes: An Empirical Exploration Based on WTO Disputes
Authors: Tao Christina Siyu , Shen Qi
Published: March 2024

This study explores the factors influencing the achievement of a mutually agreed solution (MAS) in international trade disputes, drawing insights and patterns from the WTO dispute experience. Through an in-depth examination of prevailing literature and compliance theories, the research pinpoints various factors that impact the achievement of MAS in WTO disputes, including the dynamics of economic size, experience in WTO litigation, reputation as a respondent, and costs in time. The results, obtained through a probit model, reveal the significance of economic size in achieving MAS, where the complainant’s GDP surpasses that of the respondent but not the per capita GDP and trade ratio. Originally, this study discloses that experience in WTO litigation as a disputing party and reputation as the respondent also influence the willingness to settle amicably. While this research primarily centres on the WTO, its findings, derived from WTO data, have broader implications. The identified factors are not only pertinent to WTO members but also hold relevance for solving trade disputes between states. Recognizing these factors is crucial for policymakers across different trade platforms to devise strategies that bolster collaboration and elevate the efficacy of their respective dispute-resolution mechanisms. By illuminating the complexities of the decision-making processes in achieving MAS, this study offers invaluable insights. These insights are instrumental for all stakeholders involved in trade disputes, guiding them towards forging consensus-driven solutions that uphold the principles of just and balanced international trade.
Revisiting N waiting to happen: word, construction, and corpus choices in a collostructional analysis
Authors: Newman John
Published: March 2024

In undertaking any collostructional analysis, a researcher must make decisions concerning the properties of words, constructions, and corpora. Each of these crucial aspects of the analysis can be dealt with in alternative ways: words can be investigated as either lemmas or inflected forms; a construction can be characterized in alternative ways (reliance on semantics or syntax or some combination thereof, the span of the construction, etc.); the choice of corpus (or corpora) will be influenced by whether a researcher has an interest in different genres and varieties, whether the study is synchronic or diachronic, etc. I review various ways in which a researcher’s decisions about words, constructions, and corpora are relevant to a corpus-based study of N waiting to happen, referencing throughout the collostructional analysis of this construction by Stefanowitsch and Gries. The approach adopted here can be seen as supplementing Stefanowitsch and Gries’ original collostructional analysis. It illustrates how multifarious the results of a corpus-based study of constructions can be and serves as a reminder that no one corpus-based measure can possibly answer all the questions linguists might reasonably ask about a construction.
Corrosion characteristics of in situ hybrid (Al3Ni + Al2O3)/Al composites synthesized by the solid-state combustion
Authors: Xue Jing , Yu Xiaojie , Yao Mingxiao , Su Fei , Yang Jin , Gong Jianbao , Huang Haijun
Published: March 2024

In this study, in situ hybrid (Al3Ni + Al2O3)/Al composites were prepared successfully by the solid-state combustion via Al–NiO system. The effects of Al3Ni + Al2O3 on the corrosion features of composites were analyzed using potentiodynamic polarization, electrochemical impedance spectroscopy, and immersion corrosion in 3.5 wt% NaCl solution. The results show that with the increase of NiO addition, the corrosion resistance of composites is improved, and the corrosion resistance of 15 % NiO–Al composite is almost comparable to the Al matrix. The increased quantity and dispersive distribution of Al3Ni and Al2O3 particles can effectively prevent the occurrence of corrosion and the movement of free electrons. Besides, more fine Al2O3 particles distributed in grain boundaries can increase the impedance and hinder the electrochemical corrosion preferentially starting at the boundary. Also, in the composite with high NiO addition, a better and compact interface bonding can be formed due to reduction of large size Al3Ni particles and improvement in the dispersion of particles, thereby inhibiting interface damage. This study has advanced understanding of corrosion.
Beratung gegen Rassismus: Zwischen bewegungsorientiertem Antirassismus und Staatslogik
Authors: Pöggel Tanita Jill
Published: March 2024

Der Artikel analysiert die Transformation des Antirassismus im Kontext staatlicher (Förder-)Programme zur Rassismusbekämpfung und -prävention. Hierfür wird das Konzept einer „transitional public sphere“ mobilisiert, die als Schnittstelle zwischen staatlicher Politik und sozialen Bewegungskontexten fungiert. Als Beispiel dienen rassismuszentrierte Beratungsstrukturen, die seit den späten 1990er Jahren ein komplexes Netzwerk bilden und seit den 2000er Jahren verstärkt staatlich gefördert werden. Der Artikel beleuchtet die Bedingungen, Möglichkeiten und Grenzen dieser staatlich-zivilgesellschaftlichen Schnittstellenarbeit und diskutiert zwei Strukturprobleme dieser Entwicklung.
Sentiment analysis model for cryptocurrency tweets using different deep learning techniques
Authors: Nair Michael , Abd-Elmegid Laila A. , Marie Mohamed I.
Published: March 2024

Bitcoin (BTC) is one of the most important cryptocurrencies widely used in various financial and commercial transactions due to the fluctuations in the price of this currency. Recent research in large data analytics and natural language processing has resulted in the development of automated techniques for assessing the sentiment in online communities, which has emerged as a crucial platform for users to express their thoughts and comments. Twitter, one of the most well-known social media platforms, provides many tweets about the BTC cryptocurrency. With this knowledge, we can apply deep learning (DL) to use these data to predict BTC price variations. The researchers are interested in studying and analyzing the reasons contributing to the BTC price’s erratic movement by analyzing Twitter sentiment. The main problem in this article is that no standard model with high accuracy can be relied upon in analyzing textual emotions, as it represents one of the factors affecting the rise and fall in the price of cryptocurrencies. This article aims to classify the sentiments of an expression into positive, negative, or neutral emotions. The methods that have been used are word embedding FastText model in addition to different DL methods that deal with time series, one-dimensional convolutional neural networks (CONV1D), long-short-term memory networks (LSTMs), recurrent neural networks, gated recurrent units, and a Bi-LSTM + CONV1D The main results revealed that the LSTM method, based on the DL technique, achieved the best results. The performance accuracy of the methods was 95.01, 95.95, 80.59, 95.82, and 95.67%, respectively. Thus, we conclude that the LSTM method achieved better results than other methods in analyzing the textual sentiment of BTC.
Ectopic lingual thyroid with subclinical hypothyroidism in children
Authors: An Se Jin , Cho Min Hyung , Shim Young Suk , Lee Hae Sang , Hwang Jin Soon
Published: March 2024

Objectives

Lingual thyroid is a rare condition that affects approximately 1 in 100,000 individuals. Although it is usually detected in the pediatric population through newborn screening tests or evaluation of congenital hypothyroidism, there are cases in which it remains undetected until adulthood or until symptoms arise because of glandular enlargement. The possible symptoms of lingual thyroid include foreign body sensation in the throat, dysphagia, dyspnea, and hemorrhage. Several cases of lingual thyroid are asymptomatic and accompanied by subclinical hypothyroidism. Herein, we present three cases of lingual thyroid treated with thyroid hormone suppressive therapy.

Case presentation

The three patients sought medical attention because of a sore throat or foreign body sensation in the throat. Their newborn screening tests and developmental histories were normal. These patients exhibited subclinical hypothyroidism and were treated with hormone suppression therapy.

Conclusions

Patients with lingual thyroid frequently exhibit subclinical hypothyroidism. Hormone treatment may help to reduce the size of the ectopic thyroid and improve symptoms. If an increase in size is noted during follow-up or symptoms do not improve, surgical treatments may be considered.
The crystal structure of 1-(2-chlorobenzyl)-3-(3-chlorophenyl)urea, C14H12Cl2N2O
Authors: Li Xiaohua , Yang Yang , Dang Xiaolin , Tang Wenqiang
Published: March 2024

C14H12Cl2N2O, orthorhombic, P212121 (no. 19), a = 8.5344(8) Å, b = 12.0204(16) Å, c = 13.4504(13) Å, V = 1379.8(3) Å3, Z = 4, R

gt
(F) = 0.0896, wR

ref
(F
2) = 0.2327, T = 293 K.
Utilization of zein nano-based system for promoting antibiofilm and anti-virulence activities of curcumin against Pseudomonas aeruginosa
Authors: Badr-Eldin Shaimaa M. , Aldawsari Hibah Mubarak , Ahmed Osama A. A. , Kotta Sabna , Abualsunun Walaa , Eshmawi Bayan A. , Khafagy El-Sayed , Elbaramawi Samar S. , Abbas Hisham A. , Hegazy Wael A. H. , Seleem Noura M.
Published: March 2024

Bacterial biofilms contribute to increased pathogenesis and bacterial resistance. Biofilms can enhance pathogenicity by shielding bacteria from the immune system and antibiotics, and they are associated with persistent infections. Additionally, the antibiotic resistance mechanisms within biofilms make them challenging to treat, emphasizing the need for strategies to be addressed. Mitigating bacterial virulence is a promising strategy that could ease their eradication by host immunity without stressing bacteria to induce resistance. The merits of this strategy are augmented when using safe anti-virulence candidates in proper formulations. The current study aimed to evaluate the antibiofilm and anti-virulence efficacy of curcumin–zein nanoparticles against Pseudomonas aeruginosa. In vitro investigations were performed to assess the effect of nanoparticles on biofilm formation, bacterial motility, and production of virulence factors, including proteases, hemolysins, and pyocyanin, in comparison to bulk curcumin. Furthermore, the effect on the expression of the genes that encode quorum sensing (QS) systems that regulate bacterial virulence was assessed. An in silico study was done to evaluate the affinity of curcumin to QS receptors. Additionally, an in vivo protection assay was performed to evaluate the inhibitory effect of our preparation on diminishing the P. aeruginosa’s capacity to induce pathogenesis. The results showed significant antibiofilm and anti-virulence activities of the curcumin–zein nanoparticles compared to bulk curcumin. These anti-virulence activities were attributed to the curcumin’s interfering with the P. aeruginosa QS systems that regulate its virulence. In conclusion, curcumin acquires significant anti-QS, anti-virulence, and antibiofilm activities that are vastly enhanced upon loading on zein nanoparticles.
Micelle-based nanoparticles with stimuli-responsive properties for drug delivery
Authors: Maboudi Amir Hosein , Lotfipour Mitra Hosseini , Rasouli Milad , Azhdari Mohammad H. , MacLoughlin Ronan , Bekeschus Sander , Doroudian Mohammad
Published: March 2024

Cancer treatment often causes adverse effects and toxicity, as chemotherapy drugs affect both cancerous and healthy cells. Scientists seek to target tumor cells specifically and minimize harm to normal cells. Smart nanoparticles (NPs) are a modern technique that can release drugs when triggered by internal or external stimuli, such as temperature, pH, ultrasound, etc. This review covers stimuli-responsive micelle-based nanoparticles (SRM-NPs), a promising drug delivery platform that can enhance drug efficacy and reduce toxicity. It discusses the recent developments and applications of SRM-NPs, their responsiveness to different stimuli, and their potential to overcome drug resistance and adaptive responses. It also addresses the challenges and issues related to their stability, reproducibility, biocompatibility, safety, and optimization. The study concludes that SRM-NPs have great potential for drug delivery, but more research and development are needed to improve their clinical utility.
Textile-based strain sensors for fiber-reinforced composites under tension, compression and bending
Authors: Le Xuan Hung , Cherif Chokri
Published: March 2024

This research addresses the challenging task of monitoring the structural integrity of fiber-reinforced composite (FRC) components under complex loading conditions. Ensuring the safety and functionality of these components is critical but economically challenging. Therefore, this study presents an innovative approach using textile-based strain sensors that are cost-effective and structurally compatible with carbon fiber-reinforced plastic (CFRP) components. The investigation includes the systematic electromechanical characterization and comparison of four different sensor materials at the yarn and composite scale in various test scenarios. Cyclic tensile, compression, and bending tests of CFRP specimens are performed and show good reproducibility of sensor signals within the elastic range, with significant agreement observed with applied strain measurement methods, particularly in tensile tests. Although there are minor deviations in compression and bending evaluations, the signals are still meaningful for in-situ detection of complex loading patterns, crack initiation, and structural failure. The study demonstrates that the integration of textile-based sensor yarns allows for continuous structural health monitoring (SHM) of CFRP components under various loading scenarios, including tensile, bending, and especially compressive loads.
Untersuchung der Blasendynamik von Flüssigkeitskavitation im Schmierfilm eines hydrodynamischen Gleitlagers
Authors: Schmidt Marcus , Beckmann Tom
Published: March 2024

In hydrodynamischen Gleitlagern kann im Schmierfilm unter gewissen Betriebsbedingungen Flüssigkeitskavitation auftreten. Die Flüssigkeitskavitation lässt sich in drei Kavitationsformen unterscheiden: Pseudo-, Gas- und Dampfkavitation. Lediglich Dampfkavitation kann in Verbindung mit Werkstoffkavitation zum Schaden und später zum Ausfall eines Gleitlagers führen. Eine mögliche Ursache zur Entstehung von Dampfkavitation liegt in der Dynamik der Spaltweitenänderung einer Wellenverlagerungsbahn begründet. Die Autoren haben den erstmaligen Nachweis von implodierenden Dampfblasen im Schmierfilm eines Gleitlagers in Folge einer transienten Spaltweitenänderung vollumfänglich erbracht. Zum Erzeugen der schadensrelevanten Dampfkavitation muss eine kritische Spaltweitenänderungsgeschwindigkeit in Verbindung mit einer kritischen Exzentrizität erreicht werden. Für diese Untersuchungen steht ein Gleitlager-Modellexperiment zur Verfügung, welches kontinuierlich erweitert wurde und so dem Stand der Forschung entspricht. Es ist somit möglich, kavitierende Schmierspaltströmungen sowohl qualitativ als auch quantitativ zu untersuchen. Das Modellexperiment verfügt über eine Aktorik, die eine gezielte Steuerung der Spaltweitenänderungsgeschwindigkeit zulässt und so die Kavitationsbereiche einer realen Wellenverlagerungsbahn abbildet. Das Experiment beinhaltet ein speziell entwickeltes Fluid, dass die Reynolds- und Kavitationsähnlichkeit erfüllt. Bei der Untersuchung von Flüssigkeitskavitation muss sowohl das Verdampfen der Flüssigkeit (Dampfkavitation), das Ausgasen von Luft (Gaskavitation) sowie das Vorhandensein kleinster Luftblasen (Pseudokavitation) experimentell abgebildet werden. Dies wird u. a. durch die Verwendung von konditionierten Flüssigkeiten realisiert. Abhängig vom Betriebspunkt des Gleitlagers, treten die drei Kavitationsformen separat als auch in Verbindung miteinander auf. Das gleichzeitige Auftreten reduziert, je nach Anteil der Kavitationsformen, die Kavitationserosion, indem sie die schädigungsrelevante Dampfkavitation dämpft. Das übergeordnete Forschungsziel ist es einen Parameterbereich zu definieren, in dem eine kritische Spaltweitenänderung mit einer kritischen Exzentrizität zur „reinen“ Dampfkavitation führt. Damit soll der schadenskritische Parameterbereich eingegrenzt werden. Dies soll zukünftig bei der Auslegung und Parametrisierung von hydrodynamischen Gleitlagern helfen. Die gezeigten experimentellen Ergebnisse umfassen Hochgeschwindigkeitsaufnahmen, die eine detaillierte Analyse der Blasenbildung mit einer Geschwindigkeit von 10.000 Bildern pro Sekunde (fps) ermöglichen. Es lässt sich zusammenfassen, dass die Arbeit ein tieferes Verständnis für den Kavitationsprozess in dynamisch belasteten Gleitlagern erbringt. Das Forschungsvorhaben wurde gefördert durch die Deutsche Forschungsgemeinschaft (DFG) unter der Projektnummer 462581008.
Exploring optical and electrochemical studies on thulium selenite (TmSeO3)
Authors: Sundaram Ariponnammal Shanmuga , Nesam Gregory Basil Ralph , Sivakumar Shanmugha Soundare
Published: March 2024

Thulium selenite (TmSeO3) has been synthesized by precipitation method. It shows interesting smooth surface with nearly non-symmetric texture similar to water droplets spreading on hydrophobic surface. TmSeO3 is found to be monoclinic structure with lattice parameters a = 5.919±0.01 Å, b = 12.422±0.01 Å, c = 8.717±0.01 Å, α = γ = 90°, β = 106.01° and V = 616.1 Å3. Fourier transform infrared spectroscopy confirms the presence of Tm–Se bonding. X-ray photo emission spectrum confirmed the presence of thulium, selenium and oxygen in the samples in oxide form. Magnetic study between 300 and 20 K, shows decrease of magnetic moment with temperature, then reaches saturation and aligns all thulium spins. This results cooperative interaction of thulium spins. M–H curve at 300 K confirms the paramagnetic nature of sample. Cyclic voltammogram of three electrode system, manifests electric double layer capacitance with a potential window of 0.55 V. Specific capacitance is 102 F/g. Chronopotentiometry analysis shows 75 F/g specific capacitance, 11 Wh kg−1 energy density, and 275 W kg−1 power density. Impedance analysis confirms electric double layer capacitor behavior. Hence, TmSeO3 electrode based symmetric supercapacitor device was successfully fabricated and tested by two electrode configuration in aqueous electrolyte of KOH. A specific capacitance of 64.60 F/g at 1 A/g within a potential window of 1.85 V was achieved. Impedance analysis also confirms electric double layer capacitor nature with low series resistance of 0.2596 Ω and charge transfer resistance of 1.6352 Ω. The improved cycling performance after 4000 cycles is 51.5 % specific capacitance retention. Thus, symmetric supercapacitor electrodes based TmSeO3 materials are expected to have good electrochemical properties and good stability for energy storage and conversion applications. Furthur, optical parameters 5.28 eV energy gap, 0.4924 eV Urbach energy value and 1.959 refractive index are determined.
Influence of doping concentrations on the structural, optical, and magnetic properties of Ba-doped LaCoO3 nanostructure
Authors: Sahadevan Jhelai , Madavan Mugesh , Sankaran Esakki Muthu , Kim Ikhyun , Venkatesan Rajesh , Alharbi Naiyf S. , Khaled Jamal M. , Paramasivam Sivaprakash
Published: March 2024

In this article we report the structural, morphology, vibrational, optical and magnetic properties of Ba
x
La1−x
CoO3 (x = 0, 0.05, and 0.1) (LBCO) samples. The X-ray diffraction shows that samples are in single rhombohedral phase. The Raman signals of LCO were quite small in comparison to LBCO, which exhibited a Raman peak above 675 cm−1. The band seen with a wavenumber of 484 cm−1 corresponds to the vibrational modes of E
g bending and Ba–O stretching. UV–DRS and photoluminescence spectra indicated broad absorption over the ultraviolet, visible, and near-infrared spectrums. Surface morphology and EDAX spectra corroborated the materials homogeneous size distribution and homogenous microstructure, with Ba indicating a more stable structure. XPS was used to study chemical states of LBCO and found Co (2p), La (3d), O (1s), and C (1s) elements in perovskite compounds. A peak beneath 300 eV indicated adventitious carbon on surface materials. XPS survey spectrum elements La, Ba, Co, and O had their own binding energies. The magnetization-field dependency of LBCO at 300 K showed that Ba insertion into the LCO switched it from paramagnetic to weak ferromagnetic. Ba considerably decreased magnetic saturation and coercivity, influencing magneto-crystallites’ anisotropy and coercive field.
Acute Aromatase Inhibition Impairs Neural and Behavioral Auditory Scene Analysis in Zebra Finches
Authors: Fernández-Vargas Marcela , Macedo-Lima Matheus , Remage-Healey Luke
Published: March 2024

Auditory perception can be significantly disrupted by noise. To discriminate sounds from noise, auditory scene analysis (ASA) extracts the functionally relevant sounds from acoustic input. The zebra finch communicates in noisy environments. Neurons in their secondary auditory pallial cortex (caudomedial nidopallium, NCM) can encode song from background chorus, or scenes, and this capacity may aid behavioral ASA. Furthermore, song processing is modulated by the rapid synthesis of neuroestrogens when hearing conspecific song. To examine whether neuroestrogens support neural and behavioral ASA in both sexes, we retrodialyzed fadrozole (aromatase inhibitor, FAD) and recorded in vivo awake extracellular NCM responses to songs and scenes. We found that FAD affected neural encoding of songs by decreasing responsiveness and timing reliability in inhibitory (narrow-spiking), but not in excitatory (broad-spiking) neurons. Congruently, FAD decreased neural encoding of songs in scenes for both cell types, particularly in females. Behaviorally, we trained birds using operant conditioning and tested their ability to detect songs in scenes after administering FAD orally or injected bilaterally into NCM. Oral FAD increased response bias and decreased correct rejections in females, but not in males. FAD in NCM did not affect performance. Thus, FAD in the NCM impaired neuronal ASA but that did not lead to behavioral disruption suggesting the existence of resilience or compensatory responses. Moreover, impaired performance after systemic FAD suggests involvement of other aromatase-rich networks outside the auditory pathway in ASA. This work highlights how transient estrogen synthesis disruption can modulate higher-order processing in an animal model of vocal communication.
Human Prosocial Preferences Are Related to Slow-Wave Activity in Sleep
Authors: Studler Mirjam , Gianotti Lorena R. R. , Lobmaier Janek , Maric Angelina , Knoch Daria
Published: March 2024

Prosocial behavior is crucial for the smooth functioning of the society. Yet, individuals differ vastly in the propensity to behave prosocially. Here, we try to explain these individual differences under normal sleep conditions without any experimental modulation of sleep. Using a portable high-density EEG, we measured the sleep data in 54 healthy adults (28 females) during a normal night's sleep at the participants' homes. To capture prosocial preferences, participants played an incentivized public goods game in which they faced real monetary consequences. The whole-brain analyses showed that a higher relative slow-wave activity (SWA, an indicator of sleep depth) in a cluster of electrodes over the right temporoparietal junction (TPJ) was associated with increased prosocial preferences. Source localization and current source density analyses further support these findings. Recent sleep deprivation studies imply that sleeping enough makes us more prosocial; the present findings suggest that it is not only sleep duration, but particularly sufficient sleep depth in the TPJ that is positively related to prosociality. Because the TPJ plays a central role in social cognitive functions, we speculate that sleep depth in the TPJ, as reflected by relative SWA, might serve as a dispositional indicator of social cognition ability, which is reflected in prosocial preferences. These findings contribute to the emerging framework explaining the link between sleep and prosocial behavior by shedding light on the underlying mechanisms.
Successful Practices in the Formation and Development of Management Competencies of the Head of an Educational Organization
Authors:   Novosibirsk State Pedagogical University, Kokhan Natalya V. , Eremina Anastasiya P. ,   Novosibirsk State Pedagogical University, Ganaeva Elena A. ,   Novosibirsk State Pedagogical University
Published: March 2024

Introduction. In modern conditions of development of educational systems, managerial competencies of a leader play a key role in the productive development of organizations. Theoretical analysis of scientific publications, empirical analysis of management practices of participants in additional professional education programs, professional skills competitions, carried out by the authors of the article, allowed us to formulate the research problem: the search for such directions, forms of implementation of the formation and development of management competencies of the head of an educational organization, which are examples of learning in action and stimulate the development of professional subjectivity. The purpose of the article is to update modern guidelines, successful ways of forming and developing management competencies in the practice of pedagogical universities. Methodology. The methodological basis of the study was the andragogical and competency-based approaches, the principle of learning in action. To achieve the goal of the study, the authors used theoretical (analysis, synthesis, generalization and systematization of scientific publications) and empirical (analysis of continuing professional education programs, survey, observation) methods. Applied research was carried out on the basis of the Novosibirsk State Pedagogical University and the Orenburg State Pedagogical University. Results. It has been revealed that the unifying principle of the formation and development of management competencies is learning by doing. The process of formation and development of management competencies is objectively connected with the actual practice of management and is characterized by the manifestation of activity and proactivity of the teaching worker (as the ability to show conscious volitional efforts between influencing factors and reaction to them). The specifics of modern education determine the reboot of the process of formation and development of management competencies. Conclusion. Based on an analysis of the practices of forming and developing managerial competencies of the head of an educational organization, the importance of professional subjectivity is substantiated, and examples of its manifestation are given. The methodological foundations and semantic grounds for the implementation of master’s programs in the direction of “Management in Education” are revealed. Criteria for the successful implementation of current strategies, methods for the formation and development of management competencies are proposed.
Practical Development of Artistic and Creative Activity of Students: from Work Experience
Authors:   Novosibirsk State Pedagogical University, Pavlenko Tatyana V.
Published: March 2024

Introduction. In this study, the author addresses the problem of the development of modern innovative educational technologies in the context of artistic and creative activity. The purpose of the study is to reveal the features of the implementation of modern innovative pedagogical approaches in pedagogical artistic and creative practice. Methodology. Artistic and creative activity is studied from the perspective of a personal activity approach as a leading type of pedagogical activity. From the point of view of the competence approach, the main competencies of students are determined within the framework of continuous multi-level specialized education (artistic, aesthetic and socio-pedagogical). The Childrenʼs Academy of Artistic Creativity and Design became a research site. Results. The study shows that the project method is currently in demand in the context of the development of modern innovative educational technologies. The importance for pedagogical artistic and creative practice is particularly noted. It is shown that during the implementation of the project, the student acquires certain artistic and creative competencies necessary for further training in professional artistic and creative activities. Conclusion. In conclusion, the main aspects of the application of the project method in pedagogical artistic and creative practice are shown.
Deviant Behavior of Schoolchildren: Problems and Solutions
Authors:   Secondary school no. 1 named after Admiral Kholostyakov, Feshkova Elena V. , Grebenkina Anna A. ,   Novosibirsk State University of Architecture, Design and Arts named after A. D. Kryachkov, Grebenkin Evgeny V. ,   Branch of the Southern Federal University
Published: March 2024

Introduction. The authors investigate the problem of deviant behavior of schoolchildren, which is still relevant at the present time, which is associated with new approaches to studying the factors of social adaptation and development of a child’s personality through education, since in a certain sense it creates this space and affects his social activity. Methodology. Deviant behavior of schoolchildren is studied from the perspective of a personal approach in the context of psychological and pedagogical aspects of the prevention of destructive behavior. Results. The authors note that currently schools are gradually moving beyond the exclusively educational paradigm, so there is an increased interest in reviving the idea of education with an emphasis on traditional values and patriotism. It is extremely difficult to reintegrate underachieving, problematic students into the school environment, for this it is necessary to change the mentality of teachers and the school education system as a whole, focused not only on leaders, but also outsiders. Within the framework of this article, an attempt is made to describe in a detailed form the whole range of problems that accumulate among minors in family and school settings. Conclusion. In order to successfully combat various kinds of deviations of schoolchildren, it is necessary to know the real causes of maladaptation in order to improve the quality of psychological and pedagogical impact on child development.