bluuebunny/crossref_metadata_2025 huggingface dataset:
Performance of the ferrofluid-spiral labyrinth combined seal for sealing liquid
Authors: Wang Hujun , Gao Zhongquan , Meng Yuan , Li Yan , Zhang Qiang
Published: February 2023

When the ferrofluid is used to seal liquid, the relative movement between the ferrofluid and the sealed liquid causes the stability problem of their interface, and the sealing performance is poor. However, the spiral and the spiral sleeve of the spiral labyrinth seal interact with the sealed liquid to make it reverse flow to prevent leakage when the shaft rotates. In order to improve the performance of rotary ferrofluid seal, the ferrofluid-spiral combined seal structure and the ferrofluid-spiral labyrinth combined seal structure are designed. A combined seal test-bench is built. The pressure resistance experiments and seal life experiments of ferrofluid seal and two type of combined seals are carried out. The theoretical and experimental results show that the sealing performance of the ferrofluid-spiral labyrinth combined seal is better than that of the ferrofluid-spiral combined seal ferrofluid seal. Ferrofluid-spiral labyrinth combined seal can not only solve the failure problem of ferrofluid seal at high speed, but also solve the leakage problem of spiral seal at shutdown and low speed, so as to achieve a more stable sealing effect at different speeds. The higher the speed is, the better its sealing performance is.
Coupling of PSO and FE methods for electrical conductivity identification of materials used in eddy current separator
Authors: Ouili Mehdi , Mehasni Rabia , Feliachi Mouloud , Latreche Mohamed El Hadi
Published: February 2023

In this work, an identification of the electrical conductivity of material σ was carried out. This is accomplished by formulating and solving an inverse problem based on the minimization of an objective function using the Particle Swarm Optimization (PSO) method. Such a function represents the difference between the experimentally measured final ejection position and that numerically computed by solving the material magnetic separation problem. For this, the coupled magnetic field and the material dynamic governing equations were numerically solved using the finite element (FE) and Runge–Kutta (RK4) methods. The strong correlation observed between the computed and measured final position of the separated material verifies the accuracy of the proposed identifying approach.
An improved intelligent water drops feature selection for finger vein recognition
Authors: Jayapriya P. , Umamaheswari K. , Kavitha A. , Ahilan A.
Published: February 2023

In recent years, finger vein recognition has gained a lot of attention and been considered as a possible biometric feature. Various feature selection techniques were investigated for intrinsic finger vein recognition on single feature extraction, but their computational cost remains undesirable. However, the retrieved features from the finger vein pattern are massive and include a lot of redundancy. By using fusion methods on feature extraction approaches involving weighted averages, the error rate is minimized to produce an ideal weight. In this research, a novel combinational model of intelligent water droplets is proposed along with hybrid PCA LDA feature extraction for improved finger vein pattern recognition. Initially, finger vein images are pre-processed to remove noise and improve image quality. For feature extraction, Linear Discriminant Analysis (LDA) and Principle Component Analysis (PCA) are employed to identify the most relevant characteristics. The PCA and LDA algorithms combine features to accomplish feature fusion. A global best selection method using intelligent water drops (GBS-IWD) is employed to find the ideal characteristics for vein recognition. The K Nearest Neighbour Classifier was used to recognize finger veins based on the selected optimum features. Based on empirical data, the proposed method decreases the equal error rate by 0.13% in comparison to existing CNN, 3DFM, and JAFVNet techniques. The overall accuracy of the proposed GBSPSO-KNN is 3.89% and 0.85% better than FFF and GWO, whereas, the proposed GBSIWD-KNN is 4.37% and 1.35% better than FFF and GWO respectively.
Hand pose estimation based on fish skeleton CNN: application in gesture recognition
Authors: Zhang Mingyue , Zhou Zhiheng , Tao Xiyuan , Zhang Na , Deng Ming
Published: February 2023

The modern world contains a significant number of applications based on computer vision, in which human-computer interaction plays a crucial role, pose estimation of the hand is a crucial approach in the field of human-computer interaction. However, previous approaches suffer from the inability to accurately measure position in real-world scenes, difficulty in obtaining targets of different sizes, the structure of complex network, and the lack of applications. In recent years, deep learning techniques have produced state-of-the-art outcomes but there are still challenges that need to be overcome to fully exploit this technology. In this research, a fish skeleton CNN (FS-HandNet) is proposed for hand posture estimation from a monocular RGB image. To obtain hand pose information, a fish skeleton network structure is used for the first time. Particularly, bidirectional pyramid structures (BiPS) can effectively reduce the loss of feature information during downsampling and can be used to extract features from targets of different sizes. It is more effective at solving problems of different sizes. Then a distribution-aware coordinate representation is employed to adjust the position information of the hand, and finally, a convex hull algorithm and hand pose information are applied to recognize multiple gestures. Extensive studies on three publicly available hand position benchmarks demonstrate that our method performs nearly as well as the state-of-the-art in hand pose estimation. Additionally, we have implemented hand pose estimation for the application of gesture recognition.
Psychometric properties of the English language version of the C-BiLLT evaluated in typically developing Canadian children
Authors: Bootsma Jael N. , Campbell Fiona , McCauley Dayle , Hopmans Sarah , Grahovac Danijela , Cunningham BJ , Phoenix Michelle , de Camargo Olaf Kraus , Geytenbeek Johanna , Gorter Jan Willem
Published: February 2023

PURPOSE: This study aimed to 1) investigate the convergent and discriminant validity, internal consistency, and test-retest reliability of the Canadian English version of the Computer-Based instrument for Low motor Language Testing (C-BiLLT-CAN), and 2) explore feasibility of the C-BiLLT assessment for children with cerebral palsy (CP) and complex communication needs in the Canadian health care context. METHODS: Eighty typically developing children between 1.5 and 8.5 years of age completed the C-BiLLT-CAN, the Peabody Picture Vocabulary Test-IV (PPVT-4), the receptive language sub-test of the New Reynell Developmental Language Scales (NRDLS), and/or the Raven’s 2. Correlations between raw scores were calculated for estimates of convergent and discriminant validity. Internal consistency was calculated for all items and separately for items pertaining to vocabulary and grammar. To calculate the standard error of measurement (SEM) and intraclass correlation coefficient (ICC), 33 participants were re-tested with the C-BiLLT within three weeks. Feasibility was explored with nine participants with CP. RESULTS: C-BiLLT-CAN’s convergent validity was good to excellent (Spearman’s rho > 0.78) and discriminant validity was higher than hypothesized (Spearman’s rho > 0.8). Internal consistency (Cronbach’s alpha = 0.96), test-retest reliability (ICC > 0.9), and measurement error (SEM < 5%) were excellent. The feasibility study could not be fully completed due to the COVID-19 pandemic. Preliminary data demonstrated some technical and practical barriers for using the C-BiLLT in children with CP in Canada. CONCLUSION: The C-BiLLT-CAN showed good to excellent psychometric properties in a sample of typically developing children, indicating that it is an adequate test for measuring language comprehension in English-speaking Canadian children. Further research is needed to investigate the feasibility of the C-BiLLT-CAN in children with CP.
MODEL OF OPTIMIZATION OF TAX BURDEN ON THE ACTIVITIES OF AGRICULTURAL ENTERPRISES IN THE CONTEXT OF SUSTAINABLE DEVELOPMENT
Authors:   Cherkasy State Technological University, Odintsov Oleh M. , Bereziuk-Rybak Irina R. ,   Cherkasy State Technological University, Mann Ruslan V. ,   Cherkasy State Technological University, Slynko Mykola Yu. ,   Cherkasy State Technological University
Published: February 2023

The aim of the article is to develop an applied methodology for identifying promising areas of agricultural development in Ukraine, which is based on the optimization of the tax burden on the industry through the use of production and institutional function. The theoretical and methodological basis of the study is the concept of Laffer curve and methods of scientific knowledge (econometric methods of studying the impact of taxes on the economy, regression analysis). The study uses a methodological approach that allows to optimize the tax burden on agriculture, which increases the industry’s output at a significantly lower level of the tax burden. With the help of econometric modeling, the optimal values of the tax burden have been calculated; the main patterns of the impact of the tax burden on the economic growth of agricultural production have been determined. The modern development of agriculture within the framework of the concept of sustainable development should be aimed at achieving food security and slowing down global warming. In order to obtain opportunities for the real implementation of the declared sustainable development goals in practice, economic entities in the country’s agricultural sector must function effectively according to the criteria of socio-economic, environmental and financial efficiency. One of the most effective levers for achieving such components of efficiency in the current conditions of the development of agriculture in Ukraine is the optimization of the tax burden. It has been established that the indicators of the tax burden have a significant impact on the development trajectory of the industry and form opportunities for increasing the level of social protection of the population. To identify and model the impact of the tax burden on the development of agriculture and the possibility of achieving signs of sustainable development, it is proposed to use a four-factor production-institutional function. As econometric parameters of the functioning of the economic and production system of the agrarian sector, the level of wages, the volume of capital investments, land area, and taxes are chosen. The econometric parameters demonstrated by the elasticity coefficients of the selected factors made it possible to calculate the Laffer points of the first and second order, on the basis of which the level of the tax burden is justified, which contributes to the growth of agricultural production in the context of tax optimization. pressure on the industry. Further research should be aimed at developing a strategy for the development of agriculture in Ukraine
SRI AND ENERGY TRANSFORMATION ON THE WAY TO SUSTAINABLE COMPETITIVENESS
Authors:   Alfred Nobel University, Shkura Iryna S. , Fedulova Svitlana O. ,   Alfred Nobel University
Published: February 2023

Russian war against Ukraine turns to challenge for the whole world. The full scope of consequences is difficult to assess now, but some of them have been already clear. As a result, the world economy is under exposures of inflation, disruptions on GDP growth, food and energy crises and further supply-chain pressures. Energy prices volatility adds uncertainty to the whole system of socio-economic relations. Energy turns to weapon against the world stability. The paper concentrates on the idea that current situation in the energy sector calls for a prompt reaction on challenges, including war consequences. That, in turn, requires sustainable and responsible investment (SRI) and financial innovations for immediately energy transformation, which is an essential element for sustainable competitiveness of countries. It is also crucial not to lose a track for net zero emissions by 2050. Such investment which combines financial goals with ecological, social and governance issues are covered by umbrella term “sustainable investment”. Sustainable investment became a strong trend on global financial market, which is popular with institutional and private investors. Investment in renewable energy is a part of SRI and countries’ sustainable competitiveness depends on the SRI volumes. The research is aimed at studying interconnection between SRI and energy transformation on the way to sustainable competitiveness. The processes on the global energy market are investigated and main weak points which are sources of risks for the world economy are defined. Three significant energy-related weak points turned into risks for the world are highlighted: the level of dependency from imported gas (for European countries dependency from Russian gas in particular); energy prices volatility; energy structure (nonrenewable vs renewable). It is generalized governmental approaches in the sphere of energy transformation driven by a combination of energy security concerns and climate ambitions. The paper contains an assumption about correlation between SRI and countries’ sustainable competitiveness. This hypothesis is confirmed using correlation analysis (biserial correlation) for five countries (Germany, the USA, Canada, Australia and Japan). Strong relationship between these variables is shown. This allows to make conclusions that increasing of SRI volumes in general and clean energy projects in particular, are predominant conditions for the sustainable competitiveness of country, which is oriented to the long-term prospective and based on effective usage of all available sources, including energy, fast transformation of energy systems to the renewable sources.
PRIMEIRO REGISTRO DOCUMENTADO DO CAMARÃO-TIGRE-GIGANTE, Penaeus monodon (Fabricius, 1798), NO LITORAL DO CEARÁ, NORDESTE DO BRASIL
Authors: Dayse de Vasconcelos Silva Grasielle , Adayllana de Vasconcelos Silva Giselle , Camargo Maia Rafaela
Published: February 2023

This note records the first occurrence of the giant-tiger-shrimp, Penaeus monodon, in the coast of Ceará and compiles the current published reports of the species in Brazil.
Keywords: coastal area, exotic species, Penaeidae.
PRIMEIRO LEVANTAMENTO DA BIODIVERSIDADE DE ASCÍDIAS EM RECIFES DE ARENITO DA APA DELTA DO PARNAÍBA (BRASIL EQUATORIAL) E VARIAÇÕES DENTRO E ENTRE RECIFES
Authors: Aquino de Souza Rosana , Vieira Fortaleza Maria Tarciana , De Bastos Macêdo Carneiro Pedro , De Fátima da Silva Mororó Daiane , Ferreira Gomes José Gerardo
Published: February 2023

Este trabalho trata do primeiro levantamento das espécies de ascídias nos recifes de arenito do litoral do Piauí, na APA Delta do Parnaíba (APADP). O levantamento abrangeu três áreas de recifes, e as variações encontradas dentro de cada recife e entre recifes, no que tange à riqueza, biodiversidade e composição específica das assembleias, são descritas. Em cada área, foram amostrados dois transectos paralelos à linha de praia (um superior e um inferior), na zona de ocorrência de ascídias. Foram encontradas as seguintes espécies: Polysyncraton amethysteum, Botryllus sp., Botryllus tabori,Symplegma brakenhielmi, Euherdmania sp., Eudistoma vannamei, Ecteinascidia conklini, Didemnum duplicatum, Didemnum psammatodes e Didemnum perlucidum. Também foram encontradas espécies de Didemnum não identificadas a nível específico (Didemnum sp.1, Didemnum sp. 2, Didemnum spp.). Cinco espécies não puderam ser identificadas até gênero. As composições específicas revelam assembleias bem distintas por transecto, com poucas espécies comuns entre os transectos superior e inferior de uma mesma área e entre as áreas. Os fatores “área” e “altura” influenciaram significativamente a estrutura das assembleias (PERMANOVA, p < 0,05). O transecto inferior sempre apresentou maior diversidade que o superior. No entanto, Botryllus sp. foi muito frequente e exclusivo do transecto superior. A diversidade também variou entre as áreas amostradas e foi muito baixa na área próxima à desembocadura de um rio. Os dados são discutidos com vistas ao delineamento de um protocolo de monitoramento da fauna de ascídias, à condução de futuras pesquisas sobre a biodiversidade de ascídias no estado e à conservação dos recifes de arenito da APADP.
Palavras-chave: Ascidiacea, tunicados, litoral, Piauí, intertidal, fundo consolidado.
Tenurial Conflict Resolution Analysis of Indigenous People of Pandumaan - Sipituhuta in Humbang Hasundutan District, North Sumatera Province
Authors: OK Hasnanda Syahputra  , Anggraini Novita
Published: February 2023

The customary forest area of Tombak Haminjon (incense forest) located in Pandumaan-Sipituhuta Village has high economic value but has challenges related to overlapping land management. This research aims to determine the history, parties, causes, and conflict resolution in this customary forest. This study used a qualitative approach and purposive sampling of key respondents and in-depth interviews with the stakeholders involved. The results showed that the factors causing the conflict were tenure conflicts. On the one hand, the Pandumaan-Sipituhuta customary forest as incense producer belonged to the indigenous peoples. On the other hand, PT Toba Pulp Lestari (TPL) has also claimed its concession area. The parties interested in using this forest area consist of Key actors, the main stakeholders, and the supporting stakeholders. The determination of customary forest in Pandumaan-Sipituhuta Village has met the requirements to be designated as customary forest after going through a data verification and validation mechanism by a multistakeholder team formed by the Ministry of Environment and Forestry. The determination of the Pandumaan-Sipituhuta customary forest has met the requirements to be designated as a customary forest after going through a verification and data validation mechanism by a multi-stakeholder team formed by the Ministry of Environment and Forestry. Therefore, as a recommendation, it is necessary to accelerate the demarcation of boundaries and the confirmation of the forest area.
Some poorly known and rarely reported terrestrial arthropods (Insecta, Coleoptera, Carabidae) in Morocco
Authors: El Harche H. , Chavanon G. , El Yahyaoui O. , Dahmani J. , Fadli M.
Published: February 2023

The Carabidae play an increasing role in biodiversity conservation and ecological monitoring, making a faunistic update all the more necessary. Carabids, however, are poorly known considering their diversity in the world. Also known as ground beetles, they are the fourth most diverse group within the Coleoptera, but the amount of published data sets from Morocco is disproportionately small; many species and regions have yet to be well researched. In an effort to fill this gap, we studied the faunistic composition of the carabidae in the north-west of Morocco between spring 2019 and summer 2020 at three different habitat types using two types of traps. Here we present new data on some rare and poorly known Carabidae in Morocco: Pterostichus (Sterocorus) globosus ssp. globosus (Fabricius, 1792), Poecilus (Parapedius) decipiens ssp. decipiens (Waltl, 1835), Harpalus neglectus alluaudi (Antoine, 1922), Graniger cordicollis (Audinet Serville, 1821), Brachinus (Brachinus) efflans (Dejean, 1830), Brachinus (Brachinidius) angustatus (Dejean, 1831), Carabus (Macrothorax) rugosus ssp. rugosus (Fabricius, 1792) and Siagona dejeani (Rambur, 1838). Our results contribute to the knowledge of the Moroccan carabid fauna by introducing eight new localities of terrestrial insects that were poorly unknown and infrequently reported in Morocco over the past 20 years.

Dataset published through Zenodo (Doi: 10.5281/zenodo.7665486)
APLIKASI TIKTOK SEBAGAI LITERASI MEDIA : ANAK MUDA ANTI NARKOBA
Authors: Fadillah Siti Nurul , M.A Arifah
Published: February 2023

Drugs, a word that is already familiar to our ears, is still a complicated problem in Indonesia. Until now, Indonesia is still a country that is busy with the problem of eradicating, overcoming drugs. Based on data from the National Narcotics Agency (BNN) in Indonesia, in 2021 drug users will be 0.15 percent to 1.95 percent or around 3.66 million people. Drug abuse is not only experienced by young people but almost all levels of society, both officials and even artists. Drug addiction as a result of continuous consumption will have a negative impact both physically, psychologically, economically, socio-culturally and other impacts. Therefore, through this paper the author seeks to campaign for preventive measures from the bad influence of drugs through media literacy by utilizing the tiktok application. That by using the tiktok application, young people can go viral how dangerous drugs are by making short videos that are unique and interesting. This study uses a literature study that will collaborate with various literatures in the form of books, magazines, journals, and relevant literature.
PEMBERDAYAAN MAHASISWA JURUSAN SYARIAH SEIRING DENGAN PERKEMBANGAN IPTEK DALAM MENYONGSONG ERA REFORMASI
Authors: Wahyudi Wahyudi
Published: February 2023

Muslim students are expected to have ideals, commitment, and high integrity of religion and humanity. Therefore, to realize the Muslim’s personality as mentioned above, State Islamic College (STAIN) Kerinci has tried hard to make improvements and changes ranging from the very basic thing like formulate the vision and mission to the things that are physical development such as constructing of buildings, infrastructure facilities, and other facilities. There are many factors that can inhibit and disrupt the progress of learning, and often also the case of failure. These factors include endogen and exogenous factors. To resolve the learning problems, students’ empowerment is done to support the development of their learning Department of Syari'ah of State Islamic College (STAIN) Kerinci is empowering the students by doing the development of teaching materials, teaching, students affairs, and institutional. Mahasiswa muslim diharapkan mempunyai idealisme, komitmen dan integritas yang tinggi terhadap agama dan kemanusiaan. Karena itulah untuk mewujudkan pribadi muslim seperti yang disebutkan di atas, STAIN Kerinci telah berusaha keras dan melakukan upaya perbaikan dan perubahan mulai dari hal-hal yang sangat mendasar seperti merumuskan visi dan misi sampai pada hal-hal yang bersifat pembangunan fisik seperti pembangunan gedung, sarana prasarana dan fasilitas lainnya. Ada banyak faktor yang dapat menghambat dan mengganggu kemajuan belajar, bahkan sering juga terjadi suatu kegagalan. Faktor-faktor tersebut antara lain faktor indogen dan faktor eksogen. Dalam mengatasi masalah belajar dilakukan pemberdayaan terhdap mahasiswa untuk menunjang perkembangan belajar mahasiswa. Di Jurusan Syariah STAIN Kerinci dilakukan pengembangan bahan ajar, pembelajaran, kemahasiswaan dan kelembagaan untuk memberdayakan mahasiswa
Review of The Community College Library: Assessment
Authors: Barnett John
Published: February 2023

A review of the book, The Community College: Assessment (Association of College and Research Libraries, 2022), edited by Janet Pinkley (adjunct librarian, Evelyn and Howard Boroughs Library, Ventura College, and Head of Access Services, California State University, Channel Islands) and Kaela Casey (librarian, Evelyn and Howard Boroughs Library, Ventura College).
THE EFFECT OF PHYSICAL ACTIVITY ON BLOOD SUGAR AND CHOLESTEROL LEVELS AMONG PEOPLE WITH DIABETES MELLITUS
Authors: Suprayitna Marthilda , Fatmawati Baiq Ruli , Prihatin Kurniati
Published: February 2023

Background: Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia which can cause acute and chronic complications. Uncontrolled hyperglycemia can cause cholesterol that forms in fat metabolism to accumulate and threaten blood vessels. One of the pillars of diabetes mellitus management to reduce blood sugar and cholesterol levels is doing physical activity.
Objective: This research aimed to determine the effect of physical activity on blood sugar and cholesterol levels in diabetes mellitus patients in the working area of Cakranegara Public Health Center.
Methods: The type of this research is Quasi-experimental with one group pretest-posttest design without a control approach. The numbers of samples used in this research were 17 people, selected by purposive sampling technique. Data analysis used in this research were univariate and bivariate using Paired T-Test.
Result: Based on the Paired T-test analysis, it shows that physical activity was proven to have an effect in reducing blood sugar levels with a ρ-value of 0.000 (<0.05) and cholesterol with a ρ value of 0.000 (<0.05).
Conclusion: Based on the results, physical activity reduced blood sugar and cholesterol levels in patients with diabetes mellitus.
Translating energy balance research from the bench to the clinic to the community: Parallel animal‐human studies in cancer
Authors: Garcia Miriam B. , Schadler Keri L. , Chandra Joya , Clinton Steven K. , Courneya Kerry S. , Cruz‐Monserrate Zobeida , Daniel Carrie R. , Dannenberg Andrew J. , Demark‐Wahnefried Wendy , Dewhirst Mark W. , Fabian Carol J. , Hursting Stephen D. , Irwin Melinda L. , Iyengar Neil M. , McQuade Jennifer L. , Schmitz Kathryn H. , Basen‐Engquist Karen
Published: February 2023

Advances in energy balance and cancer research to date have largely occurred in siloed work in rodents or patients. However, substantial benefit can be derived from parallel studies in which animal models inform the design of clinical and population studies or in which clinical observations become the basis for animal studies. The conference Translating Energy Balance from Bench to Communities: Application of Parallel Animal‐Human Studies in Cancer, held in July 2021, convened investigators from basic, translational/clinical, and population science research to share knowledge, examples of successful parallel studies, and strong research to move the field of energy balance and cancer toward practice changes. This review summarizes key topics discussed to advance research on the role of energy balance, including physical activity, body composition, and dietary intake, on cancer development, cancer outcomes, and healthy survivorship.
Analisis Kemampuan Pemecahan Masalah Matematis Siswa dalam menyelesaikan Soal Cerita pada Materi Sistem Persamaan Linear Dua Variabel
Authors: Rusdi Budi , Hairun Yahya , Bani Asmar
Published: February 2023

Penelitian ini bertujuan untuk: untuk mendeskripsikan kemampuan pemecahan masalah matematis siswa dalam menyelesaikan soal cerita pada materi Sistem Persamaan Linear Dua Variabel. Jenis penelitian kualitatif ini menunjukan 17 siswa sebagai sampel dan 3 siswa dengan kategori kemampuan pemecahan masalah matematis tinggi, sedang, dan rendah sebagai subjek penelitian. Data kemampuan berpikir reflektif matematis siswa diperoleh melalui tes tertulis, observasi, dan dokumentasi. Hasil penelitian menunjukkan bahwa: 1) terdapat 8 siswa (47,05%), dengan kualifikasi kemampuan pemecahan masalah matematis dalam kategori rendah, 5 siswa (29,41%) dengan kategori sedang, dan terdapat 4 siswa (23,52%), dengan kategori tinggi; 2) siswa dengan kategori tinggi dapat memahami masalah, menyusun rencana, dan pelaksanaan rencana sebagai dasar tercapainya indikator kemampuan pemecahan masalah matematis; 3) mahasiswa dengan kategori sedang belum dapat melaksanakan rencana pada materi SPLDV sebagai dasar tercapainya indikator ketiga kemampuan pemecahan masalah matematis; 4) siswa dengan kategori rendah belum dapat memahami masalah dan melaksanakan rencana sebagai dasar tercapainya indikator kesatu dan ketiga kemampuan pemecahan masalahÂ  matematis. Hal ini menunjukan siswa MTs Muhammadiyah Pabos Kabupaten Halmahera Barat telah memiliki kemampuan pemecahan masalah matematis.
Напряженно-деформированное состояние железобетонных балок при смене знака усилия
Authors: КУРНАВИНА Софья Олеговна , ЦАЦУЛИН Илья Владимирович
Published: February 2023

В отечественных нормативных документах по сейсмостойкому строительству предполагается развитие пластических деформаций в конструкциях при сейсмическом воздействии. Их наличие оказывает существенное влияние на напряженно-деформированное состояние и несущую способность железобетонных элементов при смене знака усилия, что не учитывается в действующих нормах. Представлены результаты экспериментальных исследований работы железобетонных балок при смене знака усилия. Проведены испытания семи серий одинаковых образцов. На образцы первой серии воздействовали двумя монотонно возрастающими силами вплоть до разрушения. Их рассматривали в качестве эталонных. Образцы остальных серий испытывали двумя полуциклами нагружения. В первом полуцикле образцы нагружали до достижения заданного коэффициента пластичности. Затем их переворачивали и нагружали по той же схеме нагрузкой обратного знака вплоть до разрушения. Изучалось влияние пластических деформаций арматуры на напряженно-деформированное состояние изгибаемых железобетонных элементов при монотонном нагружении и смене знака усилия. По результатам эксперимента сделан вывод о том, что эпюры деформаций по высоте сечения как при монотонном нагружении, так и при разгрузке можно аппроксимировать билинейной зависимостью. Характер зависимости меняется в процессе нагружения. Установлено, что величина максимальных пластических деформаций в первом полуцикле нагружения значительно влияет на напряженно-деформированное состояние, несущую способность и механизм разрушения балок при смене знака усилия. В связи с этим возникает необходимость ограничения максимальных пластических деформаций в сейсмических расчетах железобетонных конструкций.
Hemşirelik Öğrencilerinin Algıladıkları Sosyal Destek Düzeyleri ile Stres ve Stresle Baş Etme Davranışları Arasındaki İlişki
Authors: ZENGİN Mürşide , TAŞ Rumeysa
Published: February 2023

Amaç: Bu çalışma hemşirelik öğrencilerinin algıladıkları sosyal destek düzeyleri ile stres ve stresle baş etme davranışları arasındaki ilişkinin belirlenmesi amacıyla gerçekleştirildi.

Gereç ve Yöntem: Araştırma tanımlayıcı ve ilişki arayıcı desende yürütüldü. Araştırmanın verileri bir üniversitenin hemşirelik bölümünde 2021-2022 bahar yarıyılında öğrenim gören 254 öğrenci aracılığıyla yüz yüze görüşme tekniği kullanılarak toplandı. Verilerin toplanmasında tanımlayıcı bilgi formu, Çok Boyutlu Algılanan Sosyal Destek Ölçeği (ÇBASDÖ), Hemşirelik Öğrencileri İçin Algılanan Stres Ölçeği (HÖASÖ) ve Hemşirelik Öğrencileri İçin Stresle Baş Etme Davranışları Ölçeği (HÖSBDÖ) kullanıldı. Verilerin değerlendirilmesinde tanımlayıcı istatistikler ile ölçek puan ortalamalarının karşılaştırılmasında korelasyon analiz testleri uygulandı.

Bulgular: Araştırmaya katılan öğrencilerinin yaş ortalamasının 20.72±1.85, %68.9’unun kadın, %55.1’inin gelir düzeyinin gidere eşit olduğu belirlendi. Çalışmaya katılan öğrencilerin %69.3’ü akademik başarı durumlarının orta olduğunu bildirdi. Araştırmada ölçek puan ortalamaları ÇBASDÖ, HÖASÖ ve HÖSBDÖ için sırasıyla 50.75±17.75, 59.59±24.35 ve 39.74±9.77 olarak saptandı. ÇBASDÖ ile HÖSBDÖ toplam puanları arasında pozitif yönde r=.207 düzeyinde ve istatistiksel olarak anlamlı bir ilişki tespit edildi (p=0-001). HÖASÖ ile HÖSBDÖ toplam puanları arasında pozitif yönde r=.233 düzeyinde ve istatistiksel olarak anlamlı bir ilişki tespit edildi (p=0.000).

Sonuç: Araştırmanın sonucunda öğrencilerin algıladıkları sosyal destek düzeyleri ile stresle baş etme davranışları arasında pozitif yönlü anlamlı bir ilişki olduğu bulundu. Hemşirelik öğrencilerinin algıladıkları yüksek stresle etkin baş etme stratejilerini kullanabilmeleri adına desteklenmeleri gerektiği düşünülmektedir.
Screening Inspiration
Authors: Roy Carole , McVicar Lindsay
Published: February 2023

Documentaries and film festivals embody in a concrete way Paulo Freire’s pedagogy of indignation, of denouncing injustice while also announcing possibilities. This article examines a study on the learning potential of documentary films for nine incarcerated women in a carceral setting who participated in a documentary film and discussion series. The impetus for this project came from a larger study of three documentary film festivals rooted in community development, activism, and social change. Like many attendees at these festivals, participants suggested that they gained information and new perspectives on themselves, others, and social issues. They reported being inspired by stories of adversity and appreciated the films as a form of informal learning. This article also discusses the unique challenges of adapting film showings to a carceral setting, including logistics and access, participant selection, and film selection.
Introduction
Authors: Cheyroux Emilie
Published: February 2023

No abstract.
New insights into the Lck-NF-κB signaling pathway
Authors: Zhang Jing , Wu Yu-Jing , Hu Xiao-Xi , Wei Wei
Published: February 2023

Lck is essential for the development, activity, and proliferation of T cells, which may contribute to pathological progression and development of human diseases, such as autoimmune disorders and cancers when functioning aberrantly. Nuclear factor-κB (NF-κB) was initially discovered as a factor bound to the κ light-chain immunoglobulin enhancer in the nuclei of activated B lymphocytes. Activation of the nuclear factor-κB pathway controls expression of several genes that are related to cell survival, apoptosis, and inflammation. Abnormal expression of Lck and nuclear factor-κB has been found in autoimmune diseases and malignancies, including rheumatoid arthritis, systemic lupus erythematosus, acute T cell lymphocytic leukemia, and human chronic lymphocytic leukemia, etc. Nuclear factor-κB inhibition is effective against autoimmune diseases and malignancies through blocking inflammatory responses, although it may lead to serious adverse reactions that are unexpected and unwanted. Further investigation of the biochemical and functional interactions between nuclear factor-κB and other signaling pathways may be helpful to prevent side-effects. This review aims to clarify the Lck-nuclear factor-κB signaling pathway, and provide a basis for identification of new targets and therapeutic approaches against autoimmune diseases and malignancies.
Anti-Kekulé number of the {(3, 4), 4}-fullerene*
Authors: Yang Rui , Jia Huimin
Published: February 2023

A {(3,4),4}-fullerene graphG is a 4-regular plane graph with exactly eight triangular faces and other quadrangular faces. An edge subset S of G is called an anti-Kekulé set, if G − S is a connected subgraph without perfect matchings. The anti-Kekulé number of G is the smallest cardinality of anti-Kekulé sets and is denoted by akG. In this paper, we show that 4≤akG≤5; at the same time, we determine that the {(3, 4), 4}-fullerene graph with anti-Kekulé number 4 consists of two kinds of graphs: one of which is the graph H1 consisting of the tubular graph Qnn≥0, where Qn is composed of nn≥0 concentric layers of quadrangles, capped on each end by a cap formed by four triangles which share a common vertex (see Figure 2 for the graph Qn); and the other is the graph H2, which contains four diamonds D1, D2, D3, and D4, where each diamond Di1≤i≤4 consists of two adjacent triangles with a common edge ei1≤i≤4 such that four edges e1, e2, e3, and e4 form a matching (see Figure 7D for the four diamonds D1 − D4). As a consequence, we prove that if G∈H1, then akG=4; moreover, if G∈H2, we give the condition to judge that the anti-Kekulé number of graph G is 4 or 5.
The gastrointestinal antibiotic resistome in pediatric leukemia and lymphoma patients
Authors: MacDonald Tamara , Dunn Katherine A. , MacDonald Jane , Langille Morgan G.I. , Van Limbergen Johan E. , Bielawski Joseph P. , Kulkarni Ketan
Published: February 2023

Introduction

Most children with leukemia and lymphoma experience febrile neutropenia. These are treated with empiric antibiotics that include β-lactams and/or vancomycin. These are often administered for extended periods, and the effect on the resistome is unknown.

Methods

We examined the impact of repeated courses and duration of antibiotic use on the resistome of 39 pediatric leukemia and lymphoma patients. Shotgun metagenome sequences from 127 stool samples of pediatric oncology patients were examined for abundance of antibiotic resistance genes (ARGs) in each sample. Abundances were grouped by repeated courses (no antibiotics, 1-2 courses, 3+ courses) and duration (no use, short duration, long and/or mixed durationg) of β-lactams, vancomycin and “any antibiotic” use. We assessed changes in both taxonomic composition and prevalence of ARGs among these groups.

Results

We found that Bacteroidetes taxa and β-lactam resistance genes decreased, while opportunistic Firmicutes and Proteobacteria taxa, along with multidrug resistance genes, increased with repeated courses and/or duration of antibiotics. Efflux pump related genes predominated (92%) among the increased multidrug genes. While we found β-lactam ARGs present in the resistome, the taxa that appear to contain them were kept in check by antibiotic treatment. Multidrug ARGs, mostly efflux pumps or regulators of efflux pump genes, were associated with opportunistic pathogens, and both increased in the resistome with repeated antibiotic use and/or increased duration.

Conclusions

Given the strong association between opportunistic pathogens and multidrug-related efflux pumps, we suggest that drug efflux capacity might allow the opportunistic pathogens to persist or increase despite repeated courses and/or duration of antibiotics. While drug efflux is the most direct explanation, other mechanisms that enhance the ability of opportunistic pathogens to handle environmental stress, or other aspects of the treatment environment, could also contribute to their ability to flourish within the gut during treatment. Persistence of opportunistic pathogens in an already dysbiotic and weakened gastrointestinal tract could increase the likelihood of life-threatening blood borne infections. Of the 39 patients, 59% experienced at least one gastrointestinal or blood infection and 60% of bacteremia’s were bacteria found in stool samples. Antimicrobial stewardship and appropriate use and duration of antibiotics could help reduce morbidity and mortality in this vulnerable population.
Characteristics of the fecal microbiome and metabolome in older patients with heart failure and sarcopenia
Authors: Peng Jieting , Gong Hui , Lyu Xing , Liu Yang , Li Shizhen , Tan Shengyu , Dong Lini , Zhang Xiangyu
Published: February 2023

Background

Increasing evidence supports that gut microbiota plays an important role in the development of cardiovascular diseases. The prevalence of sarcopenia is increasing in patients with heart failure. Muscle wasting is an independent predictor of death in heart failure patients.

Aims

In this study, we aimed to explore the characteristics of gut microbiota and metabolites in heart failure patients with or without sarcopenia.

Methods

Fecal samples of 33 heart failure patients without sarcopenia, 29 heart failure patients with sarcopenia, and 15 controls were collected. The intestinal microbiota was analyzed using 16S rRNA sequencing and the metabolites were detected using the gas chromatography-mass spectrometry method.

Results

There were significant differences in the overall microbial community structure and diversity between control and heart failure patients with or without sarcopenia. However, no clear clustering of samples was observed in heart failure with and without sarcopenia patients. Several bacterial, particularly Nocardiaceae, Pseudonocardiaceae, Alphaproteobacteria, and Slackia were significantly enriched in the heart failure patients without sarcopenia, while Synergistetes was more abundant in the heart failure patients with sarcopenia. Isobutyric acid, isovaleric acid, and valeric acid were lower in heart failure patients with sarcopenia than that without sarcopenia but lacked significance.

Conclusions

This study demonstrates that there are differences in the gut microbiota between control individuals and heart failure patients with or without sarcopenia. Modulating the gut microbiota may be a new target for the prevention and treatment of sarcopenia in heart failure patients.
Gut microbiota dysbiosis in polycystic ovary syndrome: Mechanisms of progression and clinical applications
Authors: Sun Yan , Gao Shouyang , Ye Cong , Zhao Weiliang
Published: February 2023

Polycystic ovary syndrome (PCOS) is the most common endocrine diseases in women of childbearing age that leads to menstrual disorders and infertility. The pathogenesis of PCOS is complex and has not yet been fully clarified. Gut microbiota is associated with disorders of lipid, glucose, and steroid hormone metabolish. A large body of studies demonstrated that gut microbiota could regulate the synthesis and secretion of insulin, and affect androgen metabolism and follicle development, providing us a novel idea for unravelling the pathogenesis of PCOS. The relationship between gut microbiota and the pathogenesis of PCOS is particularly important. This study reviewed recent research advances in the roles of gut microbiota in the occurrence and development of PCOS. It is expected to provide a new direction for the treatment of PCOS based on gut microbiota.
Machine learning-based ozone and PM2.5 forecasting: Application to multiple AQS sites in the Pacific Northwest
Authors: Fan Kai , Dhammapala Ranil , Harrington Kyle , Lamb Brian , Lee Yunha
Published: February 2023

Air quality in the Pacific Northwest (PNW) of the U.S has generally been good in recent years, but unhealthy events were observed due to wildfires in summer or wood burning in winter. The current air quality forecasting system, which uses chemical transport models (CTMs), has had difficulty forecasting these unhealthy air quality events in the PNW. We developed a machine learning (ML) based forecasting system, which consists of two components, ML1 (random forecast classifiers and multiple linear regression models) and ML2 (two-phase random forest regression model). Our previous study showed that the ML system provides reliable forecasts of O3 at a single monitoring site in Kennewick, WA. In this paper, we expand the ML forecasting system to predict both O3 in the wildfire season and PM2.5 in wildfire and cold seasons at all available monitoring sites in the PNW during 2017–2020, and evaluate our ML forecasts against the existing operational CTM-based forecasts. For O3, both ML1 and ML2 are used to achieve the best forecasts, which was the case in our previous study: ML2 performs better overall (R2 = 0.79), especially for low-O3 events, while ML1 correctly captures more high-O3 events. Compared to the CTM-based forecast, our O3 ML forecasts reduce the normalized mean bias (NMB) from 7.6 to 2.6% and normalized mean error (NME) from 18 to 12% when evaluating against the observation. For PM2.5, ML2 performs the best and thus is used for the final forecasts. Compared to the CTM-based PM2.5, ML2 clearly improves PM2.5 forecasts for both wildfire season (May to September) and cold season (November to February): ML2 reduces NMB (−27 to 7.9% for wildfire season; 3.4 to 2.2% for cold season) and NME (59 to 41% for wildfires season; 67 to 28% for cold season) significantly and captures more high-PM2.5 events correctly. Our ML air quality forecast system requires fewer computing resources and fewer input datasets, yet it provides more reliable forecasts than (if not, comparable to) the CTM-based forecast. It demonstrates that our ML system is a low-cost, reliable air quality forecasting system that can support regional/local air quality management.
Laser-activated irrigation: Cavitation and streaming effects from dental lasers
Authors: Anton y Otero Clara Isabel , Marger Laurine , Di Bella Enrico , Feilzer Albert , Krejci Ivo
Published: February 2023

Introduction

The aim of the present study was to assess the generation of laser-activated irrigation (LAI) with a 9,300-nm CO2 laser, a 455- and 970-nm diode laser, as well as an 810- and 980-nm diode laser with and without carbon-coated “hot tips” for improved irrigation in endodontics. Therefore, the formation of cavitation bubbles at the laser tip ends in different liquids was evaluated and compared with the traditionally applied Er:YAG laser.

Methods

The CO2 laser was applied at different power settings at a repetition rate of 14 Hz, SIROLASE for each wavelength at 10% Duty Cycle, and WISER with both wavelengths at different power settings and wavelengths. The LAI was videotaped with a high-speed camera. To measure the streaming velocity due to cavitation, all lasers were loosely coated with carbon particles and activated in pure water. Then, due to LAI, moving particles were videotaped with the same high-speed camera setup. To determine the streaming velocities, the movement of one carbon particle was tracked with the help of a measuring tool in ImageJP software and streaming velocities were calculated.

Results

With both diode laser devices at four wavelengths, it was only possible to introduce clear cavitation bubbles with low-power parameters (180 mW for the SIROLASE and 200 mW average power for the WISER laser), with the black coating of the laser tips. The 9,300-nm CO2 laser produced clear cavitation bubbles with all tested parameters. Consequently, all tested lasers produced streaming of the liquid, with decreasing velocities at increasing distances from the laser tip: Er:YAG laser 6.4 m/s, CO2 laser up to 5 m/s, and diode lasers in the range of 0.01–0.09 m/s. LIA with the Er:YAG and 9,300-nm CO2 lasers generated high and similar streaming velocities. The diode lasers tested generated significantly lower streaming velocities.
Study on the electric resistance method in crack depth measurements
Authors: Gu Jiahui , Chen Liang , Wan Yu , Teng Yaozong , Yan Shufa , Hu Liang , Wang Jiahao , Luo Hanxuan
Published: February 2023

Obtaining geometric parameters, especially depth, and describing the morphological characteristics of cracks are of great significance to control engineering disasters and accidents caused by cracks. The electric resistance method is based on the principle of differences in electrical properties between cracks and soil, which could be used to measure the single crack depth at project sites. There exists an Rmin value corresponding to a specific electrode distance d value at each Rf-d value obtained by laboratory experiments. Furthermore, a two-dimensional finite element model of soil with a single crack is established to carry out numerical simulation analysis considering the crack width W, crack depth D and complex crack conditions. The results reveal dynamic variation rules of soil resistance after crack development, and for each Rf-d value, the electrode distance d value corresponding to the Rmin value is approximately equal to the crack depth D. In the range of the electric field, the offset and rotation of the crack have little effect, while the measurement results have a strong dependence on relocation movement. The regulation gives guidance to the inversion analysis of crack depth D at project sites and has been applied in crack depth measurements of an expansive soil slope. The electric resistance method as a proposed integrated approach is of great significance and brings new perspectives into the study of crack depth measurements for field applications.