bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Prevalence and Correlative Factors of Depression Among Chinese Teachers During the COVID-19 Outbreak
Authors: Zhou Jiaojiao , Yuan Xiaofei , Huang Huanhuan , Li Yaqiong , Yu HongYe , Chen Xu , Luo Jia 
Published: June 2021

Background: Epidemiological data on outbreak-associated depression of Chinese teachers are not available. This study aimed to investigate the prevalence and correlates of depression among teachers during the coronavirus disease 2019 (COVID-19) outbreak in mainland China.Methods: A large cross-sectional online survey was conducted during the COVID-19 outbreak. Depression was assessed using the Patient Health Questionnaire-9 (PHQ-9). The Connor-Davidson Resilience Scale 25 (CD-RISC 25) and Perceived Stress Scale-10 (PSS-10) were used to measure the mental resilience and stress of participants. The correlative factors of depression were analyzed.Results: In this study, 1,096 teachers were analyzed with a median (range) age of 41 (20–65) years. Of them, 624 (56.9%) suffered from depression (PHQ-9 total score of &gt;4). The multivariate analyses showed that participants with aged ≥41 years (OR = 0.752, 95% CI:0.578–0.979, p = 0.034), participating in epidemic prevention and control (OR = 1.413, 95% CI:1.070–1.867, p = 0.015), thinking prolonged school closure have bad effect (OR = 1.385, 95% CI:1.017–1.885, p = 0.038), sleep duration/day of &lt;6 h (OR = 1.814, 95% CI:1.240–2.655, p &lt; 0.001), physical exercise duration/day of &lt;30 min (OR = 1.619, 95% CI:1.247–2.103, p &lt; 0.001), spending less time with family (OR = 1.729, 95% CI: 1.063–2.655, p = 0.002), being concerned about COVID-19 (OR = 0.609, 95% CI:0.434–0.856, p = 0.004), having poor mental resilience (OR = 6.570, 95% CI:3.533–12.22, p &lt; 0.001) and higher PSS-10 scores (OR = 9.058, 95% CI:3.817–21.50, p &lt; 0.001) were independently associated with depression.Conclusion: During the COVID-19 outbreak, depression was common among teachers. Age, participating in epidemic prevention and control, opinions toward distant teaching and prolonged school closure, sleep duration/day, physical exercise duration, spending time with family, attitude toward COVID-19, mental resilience and stress represented the independent factors for suffering from depression.
Internet Use, Life Satisfaction, and Subjective Well-Being Among the Elderly: Evidence From 2017 China General Social Survey
Authors: Yang Hua-lei , Wu Yuan-yang , Lin Xue-yu , Xie Lin , Zhang Shuo , Zhang Si-qing , Ti Shi-ming , Zheng Xiao-dong 
Published: June 2021

Purpose: The research objectives of this study are to test the scientific propositions of whether Internet use promotes life satisfaction among the elderly, whether there is variability in the effect of Internet use on the well-being of the elderly, and through what channels Internet use affects the elderly's life satisfaction.Method: Using data from the 2017 Chinese General Social Survey (CGSS), this paper employed linear regression, ordered logit model, and the propensity score matching (PSM) approach to investigate the association of Internet use with life satisfaction among the elderly in China.Results: The results show that Internet use was significantly and negatively associated with the life satisfaction of the Chinese elderly. Further analysis on group heterogeneity demonstrates that the negative association was more prominent among the participants who were males, at a lower age, had lower income and education, non-agricultural registered, and relatively healthy. Finally, the mediating effect indicates that Internet use may affect life satisfaction among the elderly through the channel of reducing their perceptions of social justice.Conclusions: In order to avoid the negative effects of using the Internet, the following policy suggestions are put forward: Improve the elderly's attitudes toward Internet use; pay attention to the sense of fairness of the elderly to improve life satisfaction; guide the elderly to reduce the time of using the Internet.
DIRECTIONS OF DEVELOPMENT OF DAIRY CATTLE BREEDING IN THE YAROSLAVL REGION
Authors: КОНОВАЛОВ А.В. , АЛЕКСЕЕВ А.А. , АБРАМОВА М.В. 
Published: June 2021

Рассмотрена динамика производства молока в сельскохозяйственных организациях Ярославской области с 2015 по 2019 год. Проведено разделение на группы предприятий по надою молока от 1 коровы. Рассмотрены проблемы малых и средних ферм. Выявлен устойчивый рост валового надоя молока. В 2019 году он составил 292 тыс. т (+16,8% к уровню 2015 г.), что обусловлено увеличением среднегодового надоя на 1 корову до 6967 кг. Наибольший рост продуктивности отмечен в группе хозяйств с надоем от 6001 до 8000 кг (29,4%), что определено комплексным подходом к совершенствованию ведения молочного скотоводства и укреплением кормовой базы. Выявлена положительная тенденция увеличения доли вегетативных траншейных кормов I и II класса, которая в 2019 году составила 66% и возросла на 20 п.п. по сравнению с 2015 годом. Анализ породного состава молочного скота в регионе показал увеличение доли высокопродуктивных пород в племенных хозяйствах с 16,5% в 2015 году до 26,0% в 2019 году. Интенсивное использование животных приводит к ранней выбраковке коров в возрасте 3,07 отела и снижению среднего возраста стад до 2,43 отела. Дальнейший рост производства молока в регионе возможен при решении комплекса задач по оптимизации породного состава молочного скота, совершенствованию производственных систем в малых и средних сельскохозяйственных предприятиях, повышению уровня кормления и улучшению условий содержания скота.
The dynamics of milk production in agricultural organizations of the Yaroslavl region in the period from 2015 to 2019 is considered, the grouping of enterprises by milk yield is carried out, the problems of small and medium-sized farms are emphasized, a steady increase of milk production was revealed, which in 2019 amounted to 292 thousand tons (+16.8% compared to 2015), which is due to an increase in the average annual milk yield per cow to 6967 kg. The greatest increase in productivity was observed in the group of farms with milk yield from 6001 to 8000 kg (+29.37%). This is determined by a comprehensive approach to improving the management of dairy cattle and strengthening the feed base. During the study period, a positive trend was revealed to increase the share of vegetative feeds of class I and II quality, which in 2019 amounted to 66% and increased by 20 p.p. compared to 2015. Analysis of the breed composition of dairy cattle in the region showed an increase in the share of highly productive breeds in breeding farms from 16.5% in 2015 to 26.0% in 2019. At the same time, intensive use of animals leads to an earlier cull of cows at the age of 3.07 calving and a decrease in the average age of herds by 6.5%, which is 2.43 calving. Further growth of milk production in the region is possible when solving a set of tasks to optimize the breed composition of dairy cattle, improve production systems, in small and medium-sized agricultural enterprises, increase the level of feeding and improve the conditions of keeping livestock.
APPLICATION OF THE ENERGY-ANTIOXIDANT COMPLEX IN THE NUTRITION OF DAIRY COWS AND ITS EFFECT ON THE PRODUCTIVITY AND QUALITY OF MILK
Authors: ФОМИЧЕВ Ю.П. , ЕРМАКОВ И.Ю. 
Published: June 2021

Изучено влияние энергетика на основе пропиленгликоля в смеси с Spirulina platensis и дигидрокверцетином на молочную продуктивность, химический состав, физические и санитарно-гигиенические параметры молока при включении их в состав рациона коров черно-пестрой породы в транзитный период. В результате было получено от коров в среднем за 3 мес лактации по 2503 кг молока при среднесуточном удое 27,8 кг против 2361 кг и 26,2 кг в контроле при содержании в молоке массовой доли жира 3,78%, белка — 3,15%, в том числе казеина — 2,46% против 3,84, 3,14 и 2,43% соответственно, в молоке коров контрольной группы. По физическим и санитарно-гигиеническим параметрам молоко коров обеих групп соответствовало нормативным требованиям. Молоко животных, получавших энергетик, отличалось пониженной кислотностью и значительно меньшим, более чем в 1,5 раза, содержанием соматических клеток.
The influence of propylene glycol-based Energizer mixed with Spirulina platensis and dihydroquercetin on milk productivity, chemical composition, physical and sanitary parameters of milk was studied. when they are included in the diet of black-breed cows in the transit period. As a result, 2503 kg of milk was obtained from cows on average for 3 months of lactation with an average daily milk yield of 27.8 kg against 2361 and 26.2 kg in the control group cows with a mass fraction of fat 3.78, protein 3.15, including casein 2.46% vs. 3.84, 3.14 and 2.43 %, respectively, in the milk of control group cows. In terms of physical and sanitary parameters, the milk of both groups of cows met the regulatory requirements. At the same time, the milk of cows that received energy bioactive Supplement was characterized by low acidity and significantly lower, more than 1.5 times, the content of somatic cells
Clinical coding of long COVID in English primary care: a federated analysis of 58 million patient records in situ using OpenSAFELY
Authors: Walker Alex J , MacKenna Brian , Inglesby Peter , Tomlinson Laurie , Rentsch Christopher T , Curtis Helen J , Morton Caroline E , Morley Jessica , Mehrkar Amir , Bacon Seb , Hickman George , Bates Chris , Croker Richard , Evans David , Ward Tom , Cockburn Jonathan , Davy Simon , Bhaskaran Krishnan , Schultze Anna , Williamson Elizabeth J , Hulme William J , McDonald Helen I , Mathur Rohini , Eggo Rosalind M , Wing Kevin , Wong Angel YS , Forbes Harriet , Tazare John , Parry John , Hester Frank , Harper Sam , O’Hanlon Shaun , Eavis Alex , Jarvis Richard , Avramov Dima , Griffiths Paul , Fowles Aaron , Parkes Nasreen , Douglas Ian J , Evans Stephen JW , Smeeth Liam , Goldacre Ben ,   (The OpenSAFELY Collaborative)
Published: June 2021

BackgroundLong COVID describes new or persistent symptoms at least 4 weeks after onset of acute COVID-19. Clinical codes to describe this phenomenon were recently created.AimTo describe the use of long-COVID codes, and variation of use by general practice, demographic variables, and over time.Design and settingPopulation-based cohort study in English primary care.MethodWorking on behalf of NHS England, OpenSAFELY data were used encompassing 96% of the English population between 1 February 2020 and 25 May 2021. The proportion of people with a recorded code for long COVID was measured overall and by demographic factors, electronic health record software system (EMIS or TPP), and week.ResultsLong COVID was recorded for 23 273 people. Coding was unevenly distributed among practices, with 26.7% of practices having never used the codes. Regional variation ranged between 20.3 per 100 000 people for East of England (95% confidence interval [CI] = 19.3 to 21.4) and 55.6 per 100 000 people in London (95% CI = 54.1 to 57.1). Coding was higher among females (52.1, 95% CI = 51.3 to 52.9) than males (28.1, 95% CI = 27.5 to 28.7), and higher among practices using EMIS (53.7, 95% CI = 52.9 to 54.4) than those using TPP (20.9, 95% CI = 20.3 to 21.4).ConclusionCurrent recording of long COVID in primary care is very low, and variable between practices. This may reflect patients not presenting; clinicians and patients holding different diagnostic thresholds; or challenges with the design and communication of diagnostic codes. Increased awareness of diagnostic codes is recommended to facilitate research and planning of services, and also surveys with qualitative work to better evaluate clinicians’ understanding of the diagnosis.
PERBEDAAN PEMBERIAN LARUTAN VITAMIN B KOMPLEKS PADA TELUR TETAS TERHADAP HASIL TETAS AYAM KAMPUNG
Authors: Arisandy Aprilianto Bayu , Widyasworo Agustina , Sudani Eddy Trijana 
Published: June 2021

ABSTRACT
The research was conducted at Mrs. Sripurwanti's farm in Rejotangan Village, Rejotangan Sub-district, Tulung Agung Regency. The research was conducted from 1 March to 1 April 2017. The aim of the research to determine the difference in the solution of Vitamin B Complex to the results of domestic chicken include hatchability, mortality and hatching weight. Research material using selected 225 eggs of chicken eggs and Vitamin B Complex as many as 30 grains. The research method used is experiments with Completely Randomized Design (RAL). The study was divided into 5 treatments and 5 replications per repeat consisting of 9 eggs. Treatment consists of the addition of Vitamin B complex as much as 0, 45 mg, 90 mg, 135 mg, and 180 mg The results are expected can provide information about alternative moisture enhancer ingredients namely Vitamin B Komplek. The results showed that vitamin B complex was not significant (P> 0.05) to hatchability, live eggs and die 2nd candling , mortality, and hatching weight. Vitamin B complex has significant effect (P <0,05) on hatchability and mortality based on candling to 2. Result of the research can be concluded that giving Vitamin B Complex as much as 45 mg deserves to be additive addition of humidity because it can increase the percentage of hatchability by 15%
PERBEDAAN JARAK TANAM TERHADAP PRODUKTIVITAS RATOON RUMPUT GAJAH (Pennisetum purpureum Cv. Mott)
Authors: Lestari Dewi , Ari kustanti Nita opi , Moeis Edya Moelia 
Published: June 2021

This study was to determine the effect of plant spacing on ratoon productivity elephant grass (Pennisetum purpureum Cv. Mott). The experiment method was conducted experimentally by experiment with diffent spacing on Ratoon Elephant Grass (Pennisetum purpureum Cv. Mott).The desigh used was a complete randomized design (RAL) with 4 treatments and 6 replications, ie P0 (50 x 100) cm, P1 (75 x 100) cm, P2 (100 x 100) cm and P3 ( 125 x 100) cm. From result showed that P0 (50 x 100) cm yielded the highest number of tillers, which was 15.78 piece and followed by P1 (75 x100) cm yielding plant height of 86.37 cm, P2 (100 x 100) cm of 679.11 gr in fresh weight and P3 (125 x 100) cm of 156.96 piece on the number of leaves. According to the results of the study can be concluded that the spacing is not significant (P>0.05) on Ratoon Elephant Grass. Need further research on the influence of devoliation, weed control and high influence of low area of Raton Elephat Grass (Pennisetum purpureum Cv. Mott).
ANALISA TINGKAT KEPUASAN PETANI PETERNAK KAMBING POTONG TERHADAP ASPEK AGRIBISNIS GAPOKTAN AGRO MANDIRI DI KECAMATAN PONGGOK KABUPATEN BLITAR
Authors: Hananditya Oryza Septian , Moeis Edya Moelia , Widyasworo Agustina 
Published: June 2021

The main reasons of this observations is to know how much satisfied beef goat farmers can got about combined farmer groups agricultural aspect that their settle on to fulfil their needed. This observations did on Ponggok Sub-District. Selecting the responden using surfeited sampling. Analysis method using method called IPA (Importance Performance Analysis) cartesius diagram and scoring system using likert scale method, and using index calculating or interval scoring from likert method to put final category in the end of analysis
The answer from satisfied agricultural aspect analysis using likert method and IPA method cartesius diagram is. Using index calculating Ponggok Sub-District got 379 Point which means got standart high category. IPA method Ponggok Sub-District got 1 variable to work with that is affiliations mediators in farming service with outside group authority and 6 other variable can be increased or just stay still. The conclusions from the observations is, Ponggok Sub-District got standart high category and needed to increasing the affiliations in farming service with outside group authority variables
ANALISIS KELAYAKAN USAHA SAPI PERAH (STUDI LAPANG DI PETERNAKAN BAPAK KHOIRI DESA GLEDUG KECAMATAN SANANKULON KABUPATEN BLITAR)
Authors: Asperinche Shela , Widyasworo Agustina , Ari kustanti Nita opi 
Published: June 2021

The research was carried out at Mr. Khoiri’s farm in Gledug Village, Sanankulon District, Blitar Regency. This study aims to determine the feasibility of the dairy cattle business in Mr. Khoiri’s farm, Gledug Village, Sanankulon District, Blitar Regency. This research material used 30 cows owned by Mr. Khoiri. The method used in this research is a field study, by collecting data, interviewing with a list of questions and observations (observations).
The feasibility of Mr. Khoiri’s dairy farming business for three years obtained an B/C value of 0,64 and R/C 1,6. NPV value of Rp. 377.044.328 and IRR of 6,16%. The conclusion that can be drawn based on research is that Mr. Khoiri’s dairy farm bussines is feasible to be developed because the NPV value is > 1 (positive). Value Benefit Cost Rasio, Return Cost Rasio, and Internal Rate Return > 1 (positive).
AS CONSEQUÊNCIAS DA REFORMA DA PREVIDÊNCIA DO BRASIL PARA A DESIGUALDADE DE GÊNERO: A VULNERABILIDADE DAS MULHERES PARA RECEBIMENTO DE BENEFÍCIOS PREVIDENCIÁRIOS A PARTIR DA EMENDA CONSTITUCIONAL Nº103/2019
Authors: Catrine Cadja Indio do Brasil da Mata  , Udenilson Batista do Carmo  , Patrícia Alves da Silva  , Mariana Farias Batista  , Vidal Borges de Oliveira  , Telma Costa dos Reis  , Poliana da Silva Carvalho Santos  , Valnei Aquino de Oliveira  , Isabela Lima da Silva  , Rebeca Vicente Cardoso Miranda  , José Wilson Soares Atanásio  
Published: June 2021

O presente artigo analisa a reforma da previdência aprovada no ano de 2019 e as desvantagens da mulher no mercado de trabalho, visto que mesmo após a reforma se faz necessário uma análise quase que cotidiana em relação a várias questões tocante previdência social brasileira. A mulher sempre foi colocada à margem da sociedade como objeto e em alguns momentos a prole, no que tange a luta pela igualdade, pela liberdade e agora pela equidade, em que se vislumbram condições iguais de salários trabalho. Emenda constitucional 103/2019 infelizmente veio corroborar com essa desigualdade, nela é possível detectar a controvérsia, elas agora contribuirão mais se quiserem se aposentar onde era 60 anos passou a ser 62 anos, no quesito pensão também houve uma alteração para que mulheres viúvas possam receber as pensões, já que são maioria. Infelizmente essa desigualdade entre gênero masculino, feminino e afins é uma questão social, fundada no patriarcado pelo qual ainda persiste na modernidade de que " mulheres não deveriam trabalhar, então poder-se-ia afirmar o motivo pelo qual acontece tamanha diferença, mas infere-se que pode ser baseado em pensamentos e atitudes machistas, onde homens e até entre elas antagonicamente, enxergarem as "mulheres" como como classe diminuída preconceituosamente em razão de ser mulher. Note que as regras vigentes na reforma da previdência foram alteradas para delongar o momento da aposentadoria dos trabalhadores brasileiros, bem como realizar a ampliação do tempo de contribuição e consequentemente reduzir os valores dos rendimentos previdenciários.
Experimental investigation of structural and operational factor effects on speed performance of wave cleaving catamarans
Authors: Сверчков А.В. , Крыжевич Г.Б. , Правдин А.Ю. 
Published: June 2021

В статье приводятся результаты экспериментального исследования влияния конструктивных факторов на ходовые качества перспективного волнорассекающего пассажирского катамарана. Цель работы – поиск принципиальных технических решений по облику катамарана, обеспечивающих повышенные ходовые качества на тихой воде, в условиях волнения и экономическую эффективность. Оценено влияние скорости хода на ходовую посадку, гидродинамическое сопротивление, буксировочную и потребную мощность волнорассекающего катамарана. Выявлена эффективность применения транцевого интерцептора на волнорассекающем катамаране. Обсуждается рациональный выбор перемещения (выдвига) транцевого интерцептора при заданных значениях водоизмещения и эксплуатационной скорости. Выявлена целесообразность перехода от двулапых кронштейнов гребных валов к однолапым. Определено изменение потребной мощности при переходе от двулапого кронштейна к однолапому. Дана количественная оценка влияния выступающих частей (рулей и кронштейнов) на буксировочное сопротивление модели. Оценено взаимное влияние выдвига интерцептора и угла статического дифферента на характеристики ходкости при движении катамарана со скоростью экономического хода и эксплуатационной скоростью. Выявлена зависимость дополнительного буксировочного сопротивления модели на волнении от формы соединительного моста катамарана. Результаты исследований использованы при проектировании современного экологичного пассажирского катамарана проекта «Ecocruiser».
The paper presents results of experimental study of structural factor effects on speed performance of a promising wave-cleaving passenger catamaran. The work purpose consists in searching for basic engineering solutions on the catamaran appearance that provide increased speed performance in still water and in seas, as well as economical efficiency. Effects of travel speed on operating trim, flow resistance, towrope power and power requirements of a wave-cleaving catamaran are evaluated. Effectiveness of using a transom intercepter in a wave-cleaving catamaran was identified. Rational selection of transom intercepter movement (advance) at specified displacement and operational speed values are discussed. Expedience of transition from two-leg propeller struts to single-leg ones is shown. Change of the power requirements at transition from two-leg propeller struts to single-leg ones is evaluated. Effects of projecting parts (rudders and propeller struts) on the model towrope resistance are evaluated quantitatively. Mutual effects of intercepter advance and static trim angle on the propulsion qualities under catamaran operation at economical and service speeds are evaluated. Dependence of the model additional towrope resistance in seas on the catamaran cross-deck structure shape are derived. The investigation results were used for design of a state-of-art ecological passenger catamaran “Ecocruiser”.