bluuebunny/crossref_metadata_2025_split huggingface dataset:
SEPARATION OF MAGNETIC ANOMALIES USING FRACTAL METHOD IN THE ESFORDI REGION FOR IRON EXPLORATION, CENTRAL EAST OF IRAN
Authors: Калварзи Амин Карими , Ширази Ареф , Ширази Адель , Пур Амин Бейранванд , Хезархани Ардешир , Назерян Хамед , Тимкин Тимофей Васильевич , Ворошилов Валерий Гаврилович 
Published: March 2023

Link for citation: Amin Karimi Kalvarzi, Aref Shirazi, Adel Shirazy, Amin Beiranvand Pour, Ardeshir Hezarkhani, Hamed Nazerian, Timkin T.V., . Voroshilov V.G. Separation of magnetic anomalies using fractal method in the Esfordi region for iron exploration, central east of Iran. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 3, рр. 197-209. In Rus.
The relevance of research is determined by the possibilities of measuring the potential magnetic field, which has self-similar (fractal) properties, as well as a practical tool for prospecting and exploration of iron ores. In the Esfordi area, this method was used by us for the first time to identify, separate and interpret geophysical (magnetic) anomalies. The main aim of this thematic and practical study is the qualitative interpretation of geophysical data, the application of new methods in the prospecting and exploration of mineral deposits, modeling the geological environment and forecasting new promising areas. Object: Esfordi region, Yazd province, Iran. Methods. To obtain additional information about the subsurface, magnetometric data were used with their interpretation by the RTP (reduction to the north magnetic pole) method. For modeling purposes, an artificial sample was made, consisting of a sphere, a cube and a cuboid, and it was found that the fractal method can be used to separate anomalies for unipolar models (cube and cuboid). Results. The results of the study were applied to the Esfordi region, where it was found that at a survey scale of 1:100000, there is a direct relationship between the fractal method and the 3D model, which can be used to locate iron ore mineralization.
ИССЛЕДОВАНИЕ ПРОСТРАНСТВЕННОГО РАСПРЕДЕЛЕНИЯ МИКРОЭЛЕМЕНТОВ В ПОЧВАХ МЕТОДОМ МНОГОМЕРНОГО СТАТИСТИЧЕСКОГО АНАЛИЗА (НА ПРИМЕРЕ ТЕРРИТОРИИ ДАЛДЫНСКОГО КИМБЕРЛИТОВОГО ПОЛЯ, СЕВЕРО-ЗАПАДНАЯ ЯКУТИЯ)
Authors: Гололобова Анна Григорьевна 
Published: March 2023

Ссылка для цитирования: Гололобова А.Г. Исследование пространственного распределения микроэлементов в почвах методом многомерного статистического анализа (на примере территории Далдынского кимберлитового поля, Северо-Западная Якутия) // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 3. – С. 89-103.
Актуальностью. В настоящее время промышленная деятельность, процессы которой приводят к ухудшению условий окружающей среды, приобретает все большие масштабы. В связи с чем необходимы проекты и мероприятия для снижения ущерба окружающей среде и восстановления нарушенных земель, которые основаны на предварительных исследованиях свойств почв, содержания и распределения микроэлементов и тяжелых металлов в условиях техногенеза. Цель: определить закономерности пространственного распределения микроэлементов и источники их поступления в поверхностный слой почв на территории промышленной площадки Удачнинского горно-обогатительного комбината с помощью инструментов многомерного статистического анализа. Объекты: доминирующие типы почв северо-таежных ландшафтов Северо-Западной Якутии. Методы: потенциометрический, колориметрический, атомно-абсорбционный, статистические методы (описательный, анализ нормального распределения, факторный анализ – методом главных компонент, пространственный). Результаты. Коэффициенты вариации микроэлементов в верхнем слое почв исследуемой территории распределяются в следующем порядке убывания: Zn˃Ni˃Mn˃Cr˃Co˃Pb˃Cd˃As. Концентрации элементов Pb, Ni, Cd, Co, Cr, Zn и As в поверхностном слое почв исследуемой территории не имеют нормального распределения, за исключением Mn. Выявлены три фактора, объясняющих дисперсию содержания микроэлементов и тяжелых металлов в почвах территории северо-таежных ландшафтов Северо-Западной Якутии. Первый фактор заметно влияет на распределение Co, Cr, Ni и Zn, второй – на Cd, третий – на As и Mn. Определены основные источники и очаги загрязнения. На содержание Co, Cr и Ni в поверхностном слое почвы оказывают воздействие карьер кимберлитовой трубки «Удачный» и хвостохранилище № 1, на Zn – селитебная территория г. Удачный, на As – полигон высокоминерализованных рассолов.
ЧИСЛЕННЫЙ АНАЛИЗ ВЛИЯНИЯ КОНФИГУРАЦИИ СИСТЕМЫ ВОЗДУХООБМЕНА НА ТЕМПЕРАТУРНЫЙ РЕЖИМ ЛОКАЛЬНЫХ РАБОЧИХ ЗОН В ПОМЕЩЕНИИ С ГАЗОВЫМ ИНФРАКРАСНЫМ ИЗЛУЧАТЕЛЕМ
Authors: Борисов Борис Владимирович , Вяткин Александр Витальевич , Кузнецов Гений Владимирович , Максимов Вячеслав Иванович , Нагорнова Татьяна Александровна 
Published: March 2023

Ссылка для цитирования: Численный анализ влияния конфигурации системы воздухообмена на температурный режим локальных рабочих зон в помещении с газовым инфракрасным излучателем / Б.В. Борисов, А.В. Вяткин, Г.В. Кузнецов, В.И. Максимов, Т.А. Нагорнова // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 2. – С. 7-16.
Актуальность. Наиболее перспективным вариантом энергоэффективной системы обеспечения регламентного теплового режима локальных рабочих мест, занимающих малую долю площадей больших по размерам цехов, являются системы так называемого «лучистого» отопления, основной частью которых являются газовые инфракрасные излучатели. Основную роль в формировании теплового режима локальной рабочей зоны играет процесс смешанной конвекции (движение воздуха вследствие его нагрева ограждающими конструкциями и потоками, которые формирует система воздухообмена). До настоящего времени анализ влияния месторасположения каналов системы воздухообмена на тепловой режим локальной рабочей зоны с использованием газового инфракрасного излучателя не выполнялся. Цель: анализ по результатам математического моделирования с использованием модели влияния положения отверстий каналов системы воздухообмена на температурные поля локальных рабочих зон вблизи макета оборудования. Объект: система отопления с использованием газового инфракрасного излучателя светлого типа и системы воздухообмена. Методы. Математическое моделирование проведено в рамках двумерной модели сопряженного теплопереноса с применением метода конечных элементов. Для численного анализа процессов теплопереноса использовались модули «The Heat Transfer in Fluids Interface», «Surface-to-Surface Radiation» и «The Turbulent Flow, k-ε Interface» программной среды COMSOL Multiphysics. Результаты. Приводятся результаты теоретических исследований, выполненных с целью определения влияния положения отверстий каналов системы воздухообмена на температурные поля и возможности управления процессом формирования регламентного теплового режима в локальных рабочих зонах при использовании газового инфракрасного излучателя. Представлены поля температур и скоростей, а также распределения температуры воздуха по высоте локальной рабочей зоны для различных вариантов расположения областей ввода и вывода системы воздухообмена. По результатам исследований выявлены основные закономерности процессов тепломассопереноса в рассматриваемых условиях, а также выявлена возможность управления процессами формирования теплового режима локальных рабочих зон, варьируя положения отверстий каналов системы воздухообмена, систем отопления на основе газового инфракрасного излучателя.
Variasi Jarak Titik Fokus Cahaya Foton Pada PV Yang di Hibrid dengan TEG Menggunakan Pemisah Spektrum jenis Hot Mirror
Authors: Mustofa Mustofa 
Published: March 2023

Titik fokus lensa Fresnel memiliki peranan penting untuk menangkap energi foton yang dihasilkan bohlam LED yang digunakan sebagai energi input pada PV yang di hibrid dengan TEG. Penelitian ini bertujuan untuk melihat jarak focus terbaik PV dengan sumber energy cahaya bohlam mengunakan lensa Fresnel. Variasi titik fokus ada 3 bagian; pada titik focus lensa Fresnel (LF) itu sendiri yang sesuai spesifikasinya (11 cm jarak antara lensa dan modul PV), 1 cm di bawah titik fokus LF dan 1 cm di atas titik focus LF. Hasilnya menunjukkan bahwa posisi menjauh dari spesifikasi titik fokus lensa memberikan energi foton yang lebih besar dibandingkan dengan pada posisi titik fokusnya, dan di atas titik fokusnya. Ini terlihat dari arus listrik PV yang dihasilkan terbesar pada posisi di bawah titik fokus tersebut (0.65 mA) dengan efisiensi hibrid pada titik ini sebesar 13.55%. Daya yang dihasilkan berpotensi diaplikasikan sebagai charging mobile phone, power bank dan sejenisnya.Kata Kunci — posisi PV, hibrid PV-TEG, LED, hot mirror.
AMC Femtocell untuk Komunikasi Drone Frekuensi 5 GHz menggunakan AWGN Metode Selection Combining pada Lingkungan Bergedung
Authors: Eska Andrita Ceriana 
Published: March 2023

Perkembangan jaringan komunikasi seluler semakin meningkat. Penelitian ini melakukan analisa tentang jaringan komunikasi yang digunakan untuk komunikasi drone disekitar gedung-gedung dengan cakupan femtocell. Frekuensi komunikasi yang digunakan adalah 5 GHz. AMC (Adaptive Modulation and Coding) yang digunakan memanfaatkan MCS (Modulation and Code Scheme) terdiri dari QPSK, 16QAM, dan 64QAM. Hasil penelitian menunjukkan dominasi persentase 64 QAM dengan coderate 4/5 pada SC sebesar 91%.
Pengaruh Model Case-Based Learning Terhadap Kemampuan Penalaran Matematis Peserta Didik SMA Negeri 03 Tambun Selatan
Authors: Andini Novita Dwi , Salsabila Ellis , Haeruman Leny Dhianti 
Published: March 2023

Penelitian ini bertujuan untuk mengetahui pengaruh model case-based learning terhadap kemampuan penalaran matematis peserta didik. Desain metode kuasi eksperimen yang digunakan yaitu post-test only control group design. Teknik pengambilan sampel pada penelitian ini adalah simple random sampling dan cluster random sampling. Sampel penelitian adalah peserta didik kelas X IPS 2 dan X IPS 3 di SMA Negeri 03 Tambun Selatan. Kemampuan penalaran matematis peserta didik diukur menggunakan instrument penelitian yang terdiri dari lima soal uraian pada materi sistem persamaan linier tiga variabel yang telah valid dan reliabel. Hasil pengujian hipotesis menggunakan uji-t dengan taraf signifikansi , diperoleh bahwa dan sehingga didapat , maka ditolak dengan nilai Cohen’s Effect Size yang diperoleh sebesar yang termasuk dalam kategori besar dengan presentase . Kesimpulan yang dapat diambil berdasarkan hasil perhitungan tersebut adalah rata-rata kemampuan penalaran matematis peserta didik yang menerapkan model case-based learning lebih tinggi daripada peserta didik yang menerapkan model konvensional.
The Mental Health of Syrian Refugees in the United States: Examining Critical Risk Factors and Major Barriers to Mental Health Care Access
Authors: Armstrong-Mensah Elizabeth , Mitha Niha , McNair Aireona 
Published: March 2023

Owing to the 2011 civil war, many Syrians have become displaced internally within the country, have fled to neighboring countries in the region, or have resettled as refugees in the United States (US) through the United States Resettlement Program (USRP). Few studies have been conducted on the mental health of adult Syrian refugees in the US. We conducted an ecological study on the relationship between the mental health status of Syrian refugees in the US, risk factors that negatively affect their mental health post-settlement, and the barriers that prevent them from seeking mental health care. We found that racialization, targeting, under-employment, and concerns about relatives still in Syria negatively affect the mental health of Syrian refugees post-settlement. Challenges with the English language, stigma, lack of access to adequate insurance and transportation, and poor health system acculturation were barriers to Syrian refugee mental health care-seeking behavior in the US. While the US is accepting and resettling Syrian refugees in various parts of the country, it is also important that it focuses on and invests in the mental health needs of the refugees, so as to improve their physical and mental well-being.

Copyright © 2023 Arsmtrong-Mensah et al. Published by Global Health and Education Projects, Inc. This is an open-access article distributed under the terms of the Creative Commons Attribution License CC BY 4.0.
Role of Indigenous and local knowledge in seasonal forecasts and climate adaptation: A case study of smallholder farmers in Chiredzi, Zimbabwe
Authors: Zvobgo Luckson , Johnston Peter , Olagbegi Oladapo M. , Simpson Nicholas P. , Trisos Christopher H. 
Published: March 2023

Abstract

Accessible, reliable, and diverse sources of climate information are needed to inform climate change adaptation at all levels of society, particularly for vulnerable sectors, such as smallholder farming. Globally, many smallholder farmers use Indigenous knowledge (IK) and local knowledge (LK) to forecast weather and climate; however, less is known about how the use of these forecasts connects to decisions and actions for reducing climate risks. We examined the role of IK and LK in seasonal forecasting and the broader climate adaptation decision-making of smallholder farmers in Chiredzi, Zimbabwe. The data were collected from a sample of 100 smallholder farmers. Seventy-three of the 100 interviewed farmers used IK and LK weather and climate forecasts, and 32% relied solely on IK and LK forecasts for climate adaptation decision-making. Observations of cuckoo birds, leaf-sprouting of Mopane trees, high summer temperatures, and Nimbus clouds are the main indicators used for IK and LK forecasts. The use of IK and LK climate forecasts was significantly positively associated with increasing farmer age and farmland size. Farmers using IK and LK forecasts implemented, on average, triple the number of adaptation measures compared with farmers not using IK and LK. These findings demonstrate the widespread reliance of farmers on IK and LK for seasonal forecasts, and the strong positive link between the use of IK and LK and the implementation of climate adaptation actions. This positive association between IK and LK usage and the implementation of adaptation actions may be widespread in smallholder farming communities throughout Africa and globally. Recognition and inclusion of IK and LK in climate services is important to ensure their continued potential for enhancing climate change adaptation.
All-optical closed-loop voltage clamp for precise control of muscles and neurons in live animals
Authors: Bergs Amelie , Liewald Jana , Rodriguez-Rozada Silvia , Liu Qiang , Wirt Christin , Bessel Artur , Zeitzschel Nadja , Durmaz Hilal , Nozownik Adrianna , Dill Holger , Jospin Maelle , Vierock Johannes , Bargmann Cornelia , Hegemann Peter , Wiegert J. Simon , Gottschalk Alexander 
Published: March 2023

Abstract
Excitable cells can be stimulated or inhibited by optogenetics. Since optogenetic actuation regimes are often static, neurons and circuits can quickly adapt, allowing perturbation, but not true control. Hence, we established an optogenetic voltage-clamp (OVC). The voltage-indicator QuasAr2 provides information for fast, closed-loop optical feedback to the bidirectional optogenetic actuator BiPOLES. Voltage-dependent fluorescence is held within tight margins, thus clamping the cell to distinct potentials. We established the OVC in muscles and neurons of Caenorhabditis elegans, and transferred it to rat hippocampal neurons in slice culture. Fluorescence signals were calibrated to electrically measured potentials, and wavelengths to currents, enabling to determine optical I/V-relationships. The OVC reports on homeostatically altered cellular physiology in mutants and on Ca2+-channel properties, and can dynamically clamp spiking in C. elegans. Combining non-invasive imaging with control capabilities of electrophysiology, the OVC facilitates high-throughput, contact-less electrophysiology in individual cells and paves the way for true optogenetic control in behaving animals.
Deep reinforcement learning identifies personalized intermittent androgen deprivation therapy for prostate cancer
Authors: Lu Yitao , Chu Qian , Li Zhen , Wang Mengdi , Gatenby Robert , Zhang Qingpeng 
Published: March 2023

Abstract
The evolution of drug resistance leads to treatment failure and tumor progression. Intermittent androgen deprivation therapy (IADT) helps responsive cancer cells compete with resistant cancer cells in intratumoral competition. However, conventional IADT is population-based and ignores the heterogeneous phenotypes of individual patients. To address this challenge, we developed a time-varied, mixed-effect, and generative Lotka-Volterra (tM-GLV) model to account for the heterogeneity of the evolution mechanism and the pharmacokinetics of individual patients. Then, we proposed a reinforcement learningenabled individualized IADT framework, namely, I2ADT, to learn the patient-specific tumor dynamics and derive the optimal drug administration policy. Experiments with clinical trial data demonstrated that the proposed I2ADT can significantly prolong the time to progression of prostate cancer patients with reduced cumulative drug dosage. This research elucidates the application of reinforcement learning techniques to identify personalized adaptive cancer therapy.
The association of feeding difficulties and ge­­neric health-related quality of life among children born with esophageal atresia
Authors: Ax Sofie Örnö , Dellenmark-Blom Michaela , Abrahamsson Kate , Jönsson Linus , Gatzinsky Vladimir 
Published: March 2023

Abstract
Background: Children born with esophageal atresia experience feeding difficulties. This study investigates the association of feeding difficulties and generic health-related quality of life among children aged 2-7 and 8-17 years, born with esophageal atresia.
Methods 108 families (n=36 aged 2-7 years; n=72 aged 8-17) answered questions about difficulties in their child’s mealtimes and a validated generic health-related quality of life instrument(PedsQL 4.0). Clinical data was collected from hospital records. The association of feeding difficulties and health-related quality of life was analysed trough Mann-Whitney U-test. Linear regression determined whether the number of concurrent feeding difficulties in the child decreased the health-related quality of life scores. P<0.05 was considered significant.
Results: In children aged 2-7 and 8-17 years, to have a gastrostomy, to use a food infusion pump, need for energy-enriched food and eating small portions were respectively significantly associated with lower total health-related quality of life scores in the parent-reports (p<0.05). Most of the feeding difficulties had a negative significant relationship with the domains of physical and social functioning. Additionally, in the older age group, long mealtimes and adult mealtime supervision were associated with lower scores in both child and parent reports. In both age groups, an increased number of feeding difficulties in the child decreased the total generic health-related quality of life scores (p<0.01).
Conclusion: Parent-reported feeding difficulties are associated with low health-related quality of life among children with esophageal atresia. A high number of feeding difficulties is associated to lower health-related quality of life. Further research is needed to understand these associations.
Genome-wide identification and characterization of the sweet potato (Ipomoea batatas (L.) Lam.) ARF, Aux/IAA, GH3 and SAUR gene families reveal their putative role in tuberization
Authors: Mathura Sarah , Sutton Fedora , Bowrin Valerie 
Published: March 2023

Abstract
Background Auxins are known to have roles in the tuberization process in sweet potato (Ipomoea batatas (L.) Lam.) and these effects are mediated by various auxin signalling gene families. In this study, an analysis of the sweet potato genome was performed to identify the ARF, Aux/IAA, GH3 and SAUR auxin signalling gene family members in this crop.
Results A total of 29 ARF, 39 Aux/IAA, 13 GH3 and 200 SAUR sequences were obtained, and their biochemical properties and gene expression profiles were analysed. The sequences were relatively conserved based on exon-intron structure, motif analysis and phylogenetic tree construction. In silico expression analyses of the genes in fibrous and storage roots indicated that many sequences were not differentially expressed in tuberizing and non-tuberizing roots. However, some ARF, Aux/IAA and SAUR genes were upregulated in tuberizing storage roots compared to non-tuberizing fibrous roots while many GH3genes were downregulated. Additionally, these genes were expressed in a variety of plant parts, with some genes being highly expressed in shoots, leaves and stems while others had higher expression in the roots. Quantitative RT-PCR confirmation of gene expression was also conducted, and the results were concordant with the in silicoanalyses. A protein-protein interaction network was predicted for the differentially expressed genes, suggesting that these genes likely form part of a complex regulatory network that controls tuberization.
Conclusion This study provides useful information on the auxin signalling gene families in Ipomoea batatas and suggests putative candidates for further studies on the role of auxin signalling in tuberization.
MAP4K4 promotes chlamydial infectivity and genital tract inflammatory injury by negatively regulating protective immunity in Chlamydia infection
Authors: Luo Fangzhen , Li Zhongyu 
Published: March 2023

Abstract
Persistent Chlamydia trachomatis infection is a risk factor for tubal infertility, and the pathology is largely due to the inflammatory response; however, the underlying molecular mechanism remains to be elucidated. MAP4K4, which has been implicated in inflammation, was upregulated in Chlamydia persistent infection in our previous study. Here, we employed both in vitro and in vivo models to evaluate the role of MAP4K4 in Chlamydia infection. We demonstrated that MAP4K4 promoted Chlamydia infectivity and increased survival in the genital tract of mice and had a palliative effect on acute inflammation. Additionally, it was beneficial to the development of chronic oviduct lesions. Mechanistically, MAP4K4 downregulated cytokine secretion, regulating the bactericidal effect of the inflammatory response. In addition, MAP4K4 negatively regulates T cell immunity by reducing the proportion of CD8+ T cells and the secretion of IFN-γ and TNF-α by T cells. Thus, these data suggest that MAP4K4 is essential in regulating the host immune response that controls Chlamydia replication, driving the inflammation that causes complications such as infertility. This work provides a novel target for adjuvant therapy of Chlamydia infection.