bluuebunny/crossref_metadata_2025_split huggingface dataset:
Chow rings of stacks of prestable curves II
Authors: Bae Younghan , Schmitt Johannes 
Published: April 2023

Abstract
We continue the study of the Chow ring of the moduli stack

𝔐

g
,
n

{\mathfrak{M}_{g,n}}

of prestable curves begun in [Y. Bae and J. Schmitt,
Chow rings of stacks of prestable curves I,
Forum Math. Sigma 10 2022, Paper No. e28]. In genus 0, we show that the Chow ring of

𝔐

0
,
n

{\mathfrak{M}_{0,n}}

coincides with the tautological ring and give a complete description in terms of (additive) generators and relations. This generalizes earlier results by Keel and by Kontsevich and Manin for the spaces of stable curves. Our argument uses the boundary stratification of the moduli stack together with the study of the first higher Chow groups of the strata, in particular providing a new proof of the results of Kontsevich and Manin.
Assessment of parental lines, F1 and F2 sunflower hybrids to Septoria leaf spot infection and some inheritance patterns
Authors: Levitskaya Kristina , Soroka Anatoliy , Lyakh Viktor 
Published: May 2023

Abstract
The foliar fungal disease Septoria leaf spot is economically important for sunflowers. It develops most intensively during the wet and warm season. However, the genetic nature of sunflower resistance to Septoria leaf spot is still not clear. The purpose of our work was to identify some inheritance patterns of sunflower resistance to this disease based on the assessment of lines and hybrids of the first and second generations. The studied material was sown in 2020 and 2021 and subsequently grown on a stationary artificial infectious plot enriched with Septoria helianthi pathogen. The frequency of infection and the severity of infection of each sample were taken into account. The two-factor variance analysis revealed a significant influence of genotype on the frequency of infection in six sunflower lines and confirmed the effect of individuality of the response of individual genotypes to disease damage. It was shown that about 65 % of the total variation of the trait is due to the genetic nature of the line, and only a little more than 20 % and about 11 % – to the influence of the environment and the “genotype × environment” interaction respectively. Based on disease damage data in 2020 and 2021, the lines were classified as susceptible, moderately susceptible, moderately resistant and resistant. Differentiation of lines according to sensitivity to Septoria leaf spot made it possible to obtain hybrids with different manifestations of the trait in their parents. The nature of inheritance of infection frequency in F1 sunflower hybrids was determined by the degree of dominance. As a result, it was revealed intermediate inheritance, as well as positive and negative overdominance of the trait. The severity of infection by S. helianthi pathogen in F1 hybrids was inherited according to the type of parental form with greater resistance to the disease. F2 populations were found to inherit infection frequency from the more resistant parent, showing a proportion of infected plants similar to that of the more resistant line from a given cross combination. It has been shown that the frequency of infection of the F2 population with Septoria leaf spot can be affected by the severity of infection of F1 plant with the pathogen S. helianthi.
Vibration Signal-Based Diagnosis of Wind Turbine Blade Conditions for Improving Energy Extraction Using Machine Learning Approach
Authors: Sethi Manas Ranjan , Sahoo Sudarsan , Dhanraj Joshuva Arockia , Sugumaran V. 
Published: April 2023

Abstract
Wind power capacity is rapidly expanding across the world. In many nations, however, wind energy profit margins are being reduced. As a result, many wind farm operators are looking for ways to save costs and reduce maintenance issues. This research provides a condition monitoring and predictive maintenance framework for wind turbines based on artificial intelligence. This paper aims to create a model that categorizes various blade defects using statistical attributes with acquired vibration signals. The fault classification uses machine learning approaches, including attribute extraction, selection, and classification. First, statistical characteristics or attributes are extracted from wind turbine quaver or vibration signals utilizing a data acquisition system, then feature selection is performed using a decision tree algorithm to choose the best attributes. Next, feature classification is performed with 15-fold cross-validations using different models of tree classifiers. Then, based on their accuracy percentage, the results of machine learning classifiers are compared to provide a good model of the turbine blade for the real-time monitoring system. The objective of this learning is to design a prototype that will work best for the fault classification of turbine blades with less computational time. The logistic model tree shows the best classification accuracy of 91.57 %, with 1.72 seconds of computation time.
A Texture Statistics Encoding Model Reveals Hierarchical Feature Selectivity across Human Visual Cortex
Authors: Henderson Margaret M. , Tarr Michael J. , Wehbe Leila 
Published: May 2023

Midlevel features, such as contour and texture, provide a computational link between low- and high-level visual representations. Although the nature of midlevel representations in the brain is not fully understood, past work has suggested a texture statistics model, called the P–S model (Portilla and Simoncelli, 2000), is a candidate for predicting neural responses in areas V1–V4 as well as human behavioral data. However, it is not currently known how well this model accounts for the responses of higher visual cortex to natural scene images. To examine this, we constructed single-voxel encoding models based on P–S statistics and fit the models to fMRI data from human subjects (both sexes) from the Natural Scenes Dataset (Allen et al., 2022). We demonstrate that the texture statistics encoding model can predict the held-out responses of individual voxels in early retinotopic areas and higher-level category-selective areas. The ability of the model to reliably predict signal in higher visual cortex suggests that the representation of texture statistics features is widespread throughout the brain. Furthermore, using variance partitioning analyses, we identify which features are most uniquely predictive of brain responses and show that the contributions of higher-order texture features increase from early areas to higher areas on the ventral and lateral surfaces. We also demonstrate that patterns of sensitivity to texture statistics can be used to recover broad organizational axes within visual cortex, including dimensions that capture semantic image content. These results provide a key step forward in characterizing how midlevel feature representations emerge hierarchically across the visual system.SIGNIFICANCE STATEMENTIntermediate visual features, like texture, play an important role in cortical computations and may contribute to tasks like object and scene recognition. Here, we used a texture model proposed in past work to construct encoding models that predict the responses of neural populations in human visual cortex (measured with fMRI) to natural scene stimuli. We show that responses of neural populations at multiple levels of the visual system can be predicted by this model, and that the model is able to reveal an increase in the complexity of feature representations from early retinotopic cortex to higher areas of ventral and lateral visual cortex. These results support the idea that texture-like representations may play a broad underlying role in visual processing.
Providing Optimal Nutrition to Very Low Birthweight Infants in the NICU
Authors: Kim Jae H. 
Published: May 2023

AbstractMajor improvements in preterm nutrition have taken place in the past 2 decades that have resulted in the successful survival of extremely preterm infants. Nutrition management for preterm infants traverses several different epochs during hospitalization. More standardization of practice has been evaluated during the early epochs (parenteral nutrition and enteral feeding advancement), whereas later epochs are opportunities for enhanced research to further standardize nutrition practices.
Characteristics Associated With Serious Self-Harm Events in Children and Adolescents
Authors: Sekmen Mert , Grijalva Carlos G. , Zhu Yuwei , Williams Derek J. , Feinstein James A. , Stassun Justine C. , Johnson Jakobi A. , Tanguturi Yasas C. , Gay James C. , Antoon James W. 
Published: May 2023

OBJECTIVES
To identify patterns of psychiatric comorbidity among children and adolescents with a serious self-harm event.

METHODS
We studied children aged 5 to 18 years hospitalized with a neuropsychiatric event at 2 children’s hospitals from April 2016 to March 2020. We used Bayesian profile regression to identify distinct clinical profiles of risk for self-harm events from 32 covariates: age, sex, and 30 mental health diagnostic groups. Odds ratios (ORs) and 95% credible intervals (CIs) were calculated compared with a reference profile with the overall baseline risk of the cohort.

RESULTS
We included 1098 children hospitalized with a neuropsychiatric event (median age 14 years [interquartile range (IQR) 11–16]). Of these, 406 (37%) were diagnosed with a self-harm event. We identified 4 distinct profiles with varying risk for a self-harm diagnosis. The low-risk profile (median 0.035 [IQR 0.029–0.041]; OR 0.08, 95% CI 0.04–0.15) was composed primarily of children aged 5 to 9 years without a previous psychiatric diagnosis. The moderate-risk profile (median 0.30 [IQR 0.27–0.33]; reference profile) included psychiatric diagnoses without depressive disorders. Older female adolescents with a combination of anxiety, depression, substance, and trauma disorders characterized the high-risk profile (median 0.69 [IQR 0.67–0.70]; OR 5.09, 95% CI 3.11–8.38). Younger males with mood and developmental disorders represented the very high-risk profile (median 0.76 [IQR 0.73–0.79]; OR 7.21, 95% CI 3.69–15.20).

CONCLUSIONS
We describe 4 separate profiles of psychiatric comorbidity that can help identify children at elevated risk for a self-harm event and subsequent opportunities for intervention.
A life threatening secondary postpartum haemorrhage due to AV malformation of uterus: a missed diagnosis
Authors: Mathuriya Sanjay , Mathuriya Gayatri , Jaiswal Ayushi , Tiwari Devyani 
Published: April 2023

In current practice, the incidence of c section and other pelvic surgeries has been risen steadily worldwide, so is the complications of surgeries one such rare complication is "AV malformation". The classical presentation of uterine AVM is recurrent profuse vaginal bleeding. Presence of retained product of conception can cause diagnostic dilemma and clinical presentation could be similar. We presented a case report of 19 year old primigravida with secondary post-partum hemorrhage, 1 month following caesarean section. USG shows RPOC so patient was managed conservatively and discharge. Again she had massive bleeding per vaginum on Post LSCS day 57, was re-admitted, as the patient was hemodynamically unstable to save her life hysterectomy was performed, patient condition improved and was discharged successfully but at the cost of her fertility. HPR showed ‘vascular lesions in lower uterine segment’. Uterine AVM could present in a variety of ways from asymptomatic to periodic or episodic vaginal bleeding or secondary PPH to life threatening torrential vaginal bleeding. The proper diagnosis of AVM is crucial because the primary treatment modalities for the alternative diagnosis of RPOC is dilation and curettage that can worsen the condition. In past AVM were difficult to diagnose. However, availability of Doppler USG scanning has made diagnosis of AVM more feasible. Prompt resuscitation, a high index of suspicion and timely treatment is essential for avoiding a catastrophic outcome in this situation.
Characterisation of uropathogenic E.coli by detecting the virulence factors and its drug resistance pattern in a tertiary care hospital in India
Authors: Khelgi Amit , Ramesh Athira , Anandam Sathya , Sateesh K  
Published: May 2023

Urinary tract infections (UTIs) are among the most prevalent nosocomial and community-acquired bacterial diseases in humans, with E.coli being the most typical pathogen isolated. To detect the prevalence of virulence factors like haemolysin, haemagglutination of human erythrocytes with its effect of D-mannose, and cell surface hydrophobicity, the antibiotic sensitivity pattern and ESBL production in urinary isolates of E.coli obtained from clinical samples. We included the E.coli isolates obtained from a midstream urine sample for the study. Virulence factors like haemolysin, hemagglutination and salt aggregation were detected as per standard protocols. Antibiotic sensitivity testing was performed by the Kirby Bauer disc diffusion method. Extended-spectrum beta-lactamase (ESBL) production was seen by the combined disc diffusion method on Muller Hinton agar as per CLSI guidelines. A total of 103 E.coli isolates were tested, and among them, 24(23.30%) produced haemolysin, 65(63.10%) produced hemagglutination and 38(36.89%) had salt aggregation properties. Most isolates obtained were resistant to beta-lactam antibiotics but showed high sensitivity towards antibiotics like chloramphenicol, meropenem, amikacin, imipenem and nitrofurantoin. Around 48% of them were ESBL producers. The common virulence factors associated with UTI were P-fimbriae (MRHA), haemolysin production, cell surface hydrophobicity and type-1 fimbriae. Because of the emerging drug resistance among UPEC, therapy should be advocated as far as possible after obtaining the culture and sensitivity results to determine exact aetiology and susceptibility patterns. The sensitivity to nitrofurantoin is very high, suggesting that antibiotic recycling will help clinicians treat UPEC.
Influence of Traditional Food Processing Systems on Food Safety, Chemical Compositions, and Functional Properties of Pumpkin (Cucurbita pepo L) Seed Flour
Authors: O.G, Elechi Jasper , I, Sule Juliana 
Published: May 2023

Background: Plant foods contain almost all of the essential mineral and organic nutrients for human, as well as several unique organic phytochemicals that have been linked to the promotion of good health. This study investigated the influence of traditional food processing systems on the food safety, chemical compositions, and functional properties of pumpkin (Cucurbita pepo L) seed flour.
Methods: Fresh mature pumpkin fruits were procured from the laboratory. The pumpkin seed was divided into three different portions and subjected to traditional sand toasting, germination, and processing into flour. The samples were analyzed for proximate composition, minerals, heavy metals, vitamins, functional properties, and microbial safety.
Results: The result of proximate composition analyses revealed that raw and traditionally processed pumpkin seed flour had 33.75-39.63% protein, 43.65-36.36% fat, 7.38-5.89% moisture, 4.85-6.04% ash, 1.89-2.25% fiber, and 5.94-14.49% carbohydrate. The mineral and heavy metal content were in the range of 7.17-4.13 mg/100 Iron, 117.88-221.55 mg/100 g Potassium, 7.41-9.01 mg/100 g Calcium, 45.67-55.65 mg/100 g Phosphorus, 0.89-4.67 mg/100 g Iodine, and 7.39-6.33 mg/100 g Zinc. The toxic/deleterious elements values for Hg, Pb, As, and Cd were 0.018-0.004 mg/100 g; 0.021–0.062 mg/100 g, 0.013–0.092 mg/100 g, and 0.0011-0.0051 mg/100 g, respectively. Cyanide, Nitrate, Phytate, and Oxalate contents of the pumpkin seed flour were 0.72-0.32 mg/100 g, 2.77–1.00 mg/100 g, 35.56–14.56 mg/100 g, and 0.073–0.030 mg/100 g, respectively. An appreciable amount of vitamins (Beta-carotene, vitamin C, and thiamine) were recorded with excellent functional properties. The microbial count was within the limit of national and international standards showing the processed pumpkin seed flour to be safe.
Conclusion: It can be concluded that subjecting pumpkin seeds to traditional processing methods enhanced their nutritional properties and food safety quality. Therefore, adopting this traditional processing approach can be used in rural community nutrition and nutrition in emergency feeding programs in developing countries.
Food Security Status and Its Determinants among Inland Fishing and Non-Fishing Rural Households in Sekhukhune District Municipality, Limpopo Province
Authors: Potsiso Mokhaukhau Jenny , Abenet Belete , Johannes Hlongwane Jan 
Published: May 2023

Background: Inland fisheries are considered to have the potential to reduce food insecurity and malnutrition globally. However, its contribution has been unrecognized. The study aimed to analyze the determinants of food security status among households involved and uninvolved in inland fisheries in Sekhukhune District Municipality (SDM), Limpopo Province.
Methods: A total of 115 households were interviewed following snowball, purposive, and simple random sampling techniques. Descriptive statistics, Household Food Insecurity Access Scale (HFIAS), and Multinomial Logistic Regression (MLR) were used as data analysis tools. These tools were used to obtain the socio-economic characteristics of households and the determinants of food security status.
Results: A total of 72 households were identified as fishers, while 43 households were not fishers. Moreover, the results confirm that there was no significant difference in the food security status of households involved in inland fisheries and those who were not involved; however, most of them were mildly food insecure. Additionally, total household income, marital status, level of education and type of agricultural activity determine the food security status of households involved in inland fisheries and those who were not involved.
Conclusion: The integration of inland fisheries and other sectors is necessary to address household food insecurity related issues.
ОЦЕНКА ВОЗМОЖНОСТИ РАЗВИТИЯ ГАЗОДИНАМИЧЕСКИХ ЯВЛЕНИЙ НА II КАЛИЙНОМ ГОРИЗОНТЕ СТАРОБИНСКОГО МЕСТОРОЖДЕНИЯ КАЛИЙНЫХ СОЛЕЙ
Authors: Андрейко Сергей Семенович , Литвиновская Наталья Александровна , Папулов Артем Сергеевич 
Published: April 2023

Ссылка для цитирования: Андрейко С.С., Литвиновская Н.А., Папулов А.С. Оценка возможности развития газодинамических явлений на II калийном горизонте Старобинского месторождения калийных солей// Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 4. – С.126-134.
Актуальность исследования продиктована необходимостью обеспечить безопасность ведения горных работ и в то же время минимизировать денежные и временны затраты на дегазацию пород почвы и кровли. Оценив возможность развития газодинамического явления в зависимости от различных условий проведения горных выработок, можно выявить те участки, где действительно требуются специальные мероприятия по предотвращению газодинамических явлений. Такое деление разрабатываемого пласта на участки по опасности развития газодинамических явлений позволяет дифференцированно подходить к обеспечению безопасности горных работ без лишних финансовых затрат. Цель: провести оценку возможности развития газодинамических явлений из почвы и кровли горных выработок в различных горнотехнологических условиях при отработке запасов II калийного горизонта, дать рекомендации для ведения горных работ в местах, где возможно развития газодинамических явлений. Объект: свободные газы глинистых контактов II калийного горизонта. Метод исследования заключается в сравнении давления свободного газа в массиве пород с несущей способностью слоя пород между очагом газодинамического явления и кровлей/почвой горной выработки. В методике учитывается ширина выработки, расстояние от кровли/почвы до скопления свободного газа, давление свободного газа, прочностные свойства пород, геостатическая составляющая. Результаты. Проведена оценка возможности развития газодинамических явлений в разных условиях как в выработке с пролетом кровли 3,2 м, так и в местах расширений, где пролет кровли достигал 6,0 м. При оценке учитывалось, подработан ли рассматриваемый участок или нет. Оценка проводилась для разных газонасыщенных слоев. В результате проведенного анализа выяснено, что для пород почвы не прогнозируются газодинамические явления вне зависимости от геотехнологической ситуации и ширины выработки. Дегазация пород почвы подготовительных выработок II калийного горизонта не требуется. Результат оценки возможности развития газодинамических явлений из пород кровли выработки шириной 3,2 м показал, что газодинамические явления из пород кровли не ожидаются и профилактические мероприятия по дегазации не требуются. Оценка возможности развития газодинамических явлений из кровли камер разворота автотранспорта показала, что в местах сопряжений, в расширениях выработок возможно запоздалое газодинамическое явление из кровли горной выработки. В этих местах необходима дегазация пород кровли. Глубина дегазационных шпуров должна составлять не менее 2,0 м.
ОБЗОР МИРОВОГО РЫНКА ВОЛЬФРАМА. ЧАСТЬ 1. МИНЕРАЛЬНО-СЫРЬЕВАЯ БАЗА И ДОБЫЧА
Authors: Боярко Григорий Юрьевич 
Published: April 2023

Ссылка для цитирования: Боярко Г.Ю. Обзор мирового рынка вольфрама. Часть 1. Минерально-сырьевая база и добыча // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 4. – С.43-52.
Актуальность работы обусловлена необходимостью изучения проблем весьма изменчивого мирового рынка вольфрамового сырья. Цель: изучение состояния мировой минерально-сырьевой базы вольфрама и его добычи, оценка критичности мирового предложения вольфрамового сырья. Методы: контент-анализ информации по динамике добычи вольфрамового сырья, а также по сведениям о его запасах и ресурсах, собранных из открытых источников. Результаты. За период с 1913 по 2020 гг. в мире было добыто 3,9 млн т вольфрама. Объемы мировой добычи увеличились с 4–7 тыс. т/год в 1913–1915 гг. до 75–90 тыс. т/год в 2011–2020 гг. Лидирует в производстве вольфрамовой продукции Китай, поставлявший до 1980-х годов 25–35 % от мирового производства вольфрамового сырья, а с 1983 г. занявший главенствующее положение в предложении вольфрамовых продуктов (75–85 %). Россия поставляет 5–10 % мирового предложения вольфрамовых концентратов. Появились новые страны-поставщики вольфрамового сырья: Вьетнам (до 6,5 % от мирового предложения), Монголия, Руанда, Зимбабве. В XXI в. в условиях высоких цен на вольфрамовые продукты наметилась тенденция реанимации старых производств добычи вольфрама в Британии, Испании, Боливии, Австралии, Канаде, Мьянме, рассматривается проект возобновления работы Тырнаузского ГОКа в России. Имеющихся в мире подготовленных запасов (3,66 млн т W) и прогнозных ресурсов (10,92 млн т W) вольфрамового сырья хватит более чем на 70 лет при текущем уровне потребления. Из них 32,7 % запасов и 57,5 % потенциальных ресурсов приходятся на Китай. В нем находятся пять из десяти крупнейших в мире месторождений вольфрама. Значительными запасами и прогнозными ресурсами вольфрама обладают Россия, Казахстан, Канада и Боливия. Возможны открытия новых месторождений на малоизученных территориях Мьянмы, Монголии и Индии в Азии, Конго, Руанды, Бурунди и Зимбабве в Африке. Ввиду значительной доли мирового производства вольфрамового сырья и весьма высокой доли мировой торговли вольфрамовыми продуктами от их производства в одной стране – Китае, и вольфрамовое сырье, и другие товарные продукты вольфрама в обозримом будущем будут продолжать оставаться критическими товарами в промышленно развитых странах.