bluuebunny/crossref_metadata_2025 huggingface dataset:
Metabolitos bioactivos y actividad antioxidante in vitro del aceite esencial extraído de dos especies del género Tagetes.
Authors: Huaraca Aparco Rosa , Delgado Laime María del Carmen , Tapia Tadeo Fidelia
Published: May 2023

Objetivo: este estudio investigó los metabolitos bioactivos y actividad antioxidante de aceites esenciales de dos especies del género Tagetes. Método: el aceite esencial se obtuvo por arrastre a vapor de agua, posteriormente se determinó su rendi-miento de extracción, densidad relativa, índice de refracción y su solubilidad en etanol (70 % v/v). La composición química fue evaluada mediante cromatografía de gases acoplada a espectrometría de masas (GC-MS). La actividad antioxidante fue determinada mediante el método del radical libre 2,2-difenil-1-picrilhidracilo (DPPH) y la capacidad de atrapamiento del catión radical ABTS*+. Resultados: en los aceites esenciales de las especies Tagetes se logró identificar 26 componentes químicos para la especie Tagetes elliptica Sm. y 16 para Tagetes minuta L., ambas especies presentaron como componentes principales a los monoterpenos (61 %) y sesquiterpenos (44 %). Los metabolitos bioactivos de aceites esenciales entre ambas especies de Tagetes fueron, β-trans-ocimeno (25,03 %), trans-tagetona (51,37 %), β-mirceno (2,78) y β-cariofileno (1,17 %). Los rendimientos de extrac-ción oscilaron entre 0,05 y 0,048 %, la densidad entre 0,90 y 0,88 (g/ml) con un índice de refracción de 1,493 y 1,482 y una solubilidad (v/v) positiva entre ambas especies. La actividad antioxidante del aceite esencial en ambas especies mostró una variación entre 1,77 y 2,56 mg/mL para el DPPH y 21,02 a 41,06 mg/mL para BTS*+. Conclusión: los aceites esenciales de las especies Tagetes elliptica Sm. y Tagetes minuta L. son una fuente de metabolitos bioactivos fomentan poten-cialidades antimicrobianas y antioxidantes con fines de su uso como conservantes alimentarios.
lado obscuro da antivacinação
Authors: Machado Vieira Larissa , Cordeiro Douglas Farias
Published: May 2023

Este artigo explora a desinformação no contexto da vacinação no Facebook por meio da realização de análises baseadas na utilização de ferramentas de mineração de dados. O objetivo é  identificar, a partir de um estudo de caso no grupo “O Lado Obscuro das Vacinas”, as temáticas relacionadas às (des)informações circulantes na rede, levando em conta a teorização de bolhas e pós-verdade. São apresentadas análises de todo o conjunto de publicações veiculadas no grupo para o período de 2015 a 2019. Utilizam-se soluções computacionais para a extração e processamento de dados, com vistas a identificação de grupos temáticos e grafos de similitude. Os resultados alcançados revelam um tecer de crenças e emoções, características de um cenário pós-verdade, assim como uma convergência recorrente dos termos “sarampo” e “autismo”, com referência a controvérsias motivadas por desinformações fomentadas ainda na década de 1990.
A terhességi intrahepaticus cholestasis és a gestatiós diabetes mellitus összefüggése
Authors: Ozsvári-Vidákovich Magdolna , Somogyi Anikó , Rosta Klára
Published: May 2023

A gestatiós diabetes mellitus az egyik leggyakrabban előforduló terhespatológiai
kórkép, mely a várandósságok 5–14%-ában jelenik meg. A terhességi intrahepaticus
cholestasis a várandósság alatt előforduló májbetegségek között foglalja el az
első helyet, 0,2–27%-os gyakorisággal. Irodalmi adatok alapján a két terhességi
kórállapot egymáshoz való viszonyát vizsgáltuk meg összefoglaló közleményünkben
abból a szempontból, hogy együttes jelenlétük hogyan befolyásolja a várandósság
kimenetelét. A rendelkezésre álló kutatások azt igazolták, hogy a terhességi
intrahepaticus cholestasis szoros összefüggést mutat a gestatiós diabetes
mellitusszal. Az összefüggés hátterében a szérumepesavak glükóz-, illetve
lipidhomeostasist moduláló szerepe húzódik, a farnezoid X-receptorhoz és a
Takeda G-fehérjéhez kapcsolt receptor-5 regulációja révén. Mind a gestatiós
diabetesnek, mind a terhességi cholestasisnak lehetséges magzati szövődménye a
koraszülés, az akut légzési distressz szindróma és a méhen belüli elhalás. A
terhességi intrahepaticus cholestasisban szenvedő betegek körében a gestatiós
diabetes mellitus előfordulása gyakoribb lehet, és a két kórkép együttes
jelenléte növelheti a magzati és az anyai szövődmények kockázatát, ezért ezek
megelőzésére és kezelésére kiemelt figyelmet kell, hogy fordítson a
várandósgondozást végző szakember. Orv Hetil. 2023; 164(21): 831–835.
PHENOMENOLOGICAL KINETIC EQUATION OF THE CONVERSION FOR A BINDER OF COMPOSITE MATERIALS BASED ON ISOTHERMAL TESTS
Authors: Kondyurin A. V. , Pestrenin V. M. , Pestrenina I. V. , Landik L. V.
Published: May 2023

In the problems of technological mechanics: the manufacture of structures from composites, packaging and deployment of products from prepreg for space purposes, and others, it becomes necessary to calculate the current mechanical properties of a composite material with an incompletely cured binder. Such properties are determined primarily by the binder state, which may be described by the conversion kinetic equation. The parameters of the kinetic equation depend on many factors: temperature, diffusion, the presence of a catalytic system, modifiers, reagents, the formation of by-products of kinetic reactions, the evaporation of reagents, the effect of radiation, etc. Reliable consideration of the influence of each factor in the kinetic equation turns out to be practically impossible. Therefore, most authors use the phenomenological conversion equation based on experimental data, since these data reflect all the features of the kinetic process. We consider the first order conversion equation, which takes into account auto-acceleration and auto-deceleration. The equation parameters are determined on the basis of isothermal experimental data by the following method. The equation for the conversion rate is integrated, the integral is used to construct a system of equations containing experimental data and the desired approximation parameters, which are determined by standard mathematical methods. The dependence of the kinetic equation parameters on temperature is also constructed by approximation. Examples of constructing conversion equations for a two-component and industrial multicomponent Barnes mixture are given. It is shown that the parameters of the kinetic equation in both cases significantly depend on temperature, and for a multicomponent mixture this dependence is more complicated due to the simultaneous implementation of several reactions. Examples of using the obtained kinetic equation to calculate the curing degree of samples under a given temperature loading are given.
SPECTRAL DYNAMIC STIFFNESS METHOD FOR THE FLUTTER PROBLEM OF COMBINED PLATES
Authors: Papkov S. O. , Papkova Yu. I , Pasechnik V. A
Published: May 2023

At present time, the spectral dynamic stiffness method is being actively developed as an alternative to the finite element method for vibration and stability problems of composite structures from beams, rods, plates and shells. This approach, based on exact solutions of governing differential equations, makes it possible to more effectively study the problem in the medium and high frequency ranges, and gives analytical expressions for natural modes. It is proposed to use the advantages of this method to study the problems of dynamic stability and flutter of an orthotropic composite plate in a supersonic gas flow. Using the linear approximation of piston theory, solution of the problem is investigated according to the Galerkin method on the basis of the eigenforms of a composite plate in vacuum. According to this approach the boundary value problem is reduced to a homogeneous infinite linear algebraic system of equations with coefficients are depending from physical-mechanical and geometrical parameters of the problem. The frequency parameter is included in the system linearly, that allows us to reduce eigenproblem for infinite system to the problem of determining the eigenvalues and vectors of a matrix. The convergence of the Galerkin method depending on the number of basis functions is studied numerically. It is shown that the first 16 eigenforms provide the good convergence of the method. Examples of numerical implementation are given, obtained solution allow us to study the dependence of the critical velocity from the properties of the material and geometry of the combined plate.
REPRESENTATIVE VOLUME AND EFFECTIVE MATERIAL CHARACTERISTICS OF PERIODIC AND STATISTICALLY UNIFORMLY REINFORCED FIBER COMPOSITES
Authors: Pestrenin V. M. , Pestrenina I. V. , Landik L. V. , Fagalov A. R. , Pelevin A. G.
Published: May 2023

In the deformable solid mechanics, there are concepts associated with continuum points (displacements, relative elongations, shifts) and a set of continuum points – an elementary volume (mass, energy, stresses). The role of such volume in the mechanics of composite materials is played by the representative volume element (RVE).This concept was first introduced by R. Hill (1963). Modern authors use the W.J. Drugan, J.R. Willis (1996) formulation. Based on the analysis of the RVE concept, we formulated its essential features: RVE is the minimum possible sample for numerical tests to determine the effective material parameters of the composite; under any RVE loading, its macroscopic stress-strain state is uniform. Its significance for the mechanics of composite materials is revealed: the existence of RVE for a composite is a criterion for applying the effective modulus theory to the analysis of its stress-strain state; the dehomogenization of a stressed-state composite material at a point is a solution to the micromechanics problem of the RVE stress-strain state determination; the characteristic size of RVE limits the size of the sampling grid in the numerical study. An iterative algorithm for constructing a representative volume of a periodic structure composite and its effective material thermoelastic characteristics is proposed. It is shown that the geometric shape of such a composition is a rectangular parallelepiped. The RVE construction algorithm for periodic compositions is extended to the composites statistically uniformly reinforced with continuous fibers. A method for modeling such materials with a following regular structure is suggested described: in the section perpendicular to the fibers, fiber centers should be located at the vertices of regular triangles. Examples of constructing RVE and thermoelastic material characteristics of specific compositions are given. The calculation results are compared with the data obtained using certified software products.
NUMERICAL SIMULATION OF GAS-DYNAMIC AND STRENGTH CHARACTERISTICS OF A FAN FOR THE EXPERIMENTAL TEST RIG FOR INVESTIGATION OF ICE BREAKDOWN ON ROTATING WORKING BLADES
Authors: Kalyulin S. L. , Kalyulin N. A. , Modorskii V. Y. , Vladimirov N. V.
Published: May 2023

The paper is devoted to modern experimental and computational studies analysis on the point of asymmetric destruction of ice on the surfaces of the working blades of gas-turbine engine blades. A schematic diagram of an experimental setup has been developed, which consists of the following main elements: a wind tunnel, a cold chamber, a model fan, an electric motor, and a high-speed video camera. The experimental setup makes it possible to carry out laboratory studies of the ice formation and destruction processes. The choice of the experimental test rig parameters was made to allow assessing the icing of the blades of a rotating fan, which reproduces the processes occurring on gas turbine engines. Based on the results of three-dimensional gas-dynamic and strength calculations, the design and basic geometrical parameters of the flow path and the dummy fan were determined. The dependences of compression ratio Pk and the power consumption of a model fan Wcons on the value of the mass air flow Gair for a different number of rotor blades are presented. The choice of materials for the disk hub and blades of a dummy fan which experience tensile and bending loads at high rotation speeds up to 12.000 rpm was made, that satisfies the conditions of static and dynamic strength, also the allowable safety factors were evaluated, and pressure characteristics were obtained.
ГЕНЕРАЦИЯ ПОВЕРХНОСТНЫХ АКУСТИЧЕСКИХ ВОЛН СЕГНЕТОЭЛЕКТРИЧЕСКОЙ ПЛЕНКОЙ BST ПРИ ДЕЙСТВИИ ОДНООСНОЙ НАГРУЗКИ
Authors: Shirokov1 V. B. , Timoshenko P. E. , Kalinchuk V. V.
Published: May 2023

The electro-mechanical properties of a ferroelectric film of barium strontium titanate (BST) film located on a silicon substrate depend on applied external strain. A significant dependence is observed for concentrations close to values, where a phase transition for the ferroelectric film occurs. A model of single-crystal BST film near the phase transition under uniaxial strain is studied by the thermodynamic theory of phase transitions. The material properties of the film obtained by the model are used for numerical study of the excitation of Rayleigh’ acoustic waves on the surface of the film-substrate heterostructure. Shifting the extrema of S-parameters, characterizing the efficiency of excitation of surface acoustic waves, is shown under the applied strain. The change of S-parameters for the first three resonances determined principally by the geometry of the interdigital electrodes is presented. The largest shift of resonant frequency is observed in a case of the second resonance that corresponds to Sezava wave.
Test-Retest Reliability and Minimal Detectable Change of Timed Up and Go Test in Older Adults with Peripheral Vestibular Hypofunction
Authors: Jasper Amie Marie , Blackinton Mary , Gallichio Joann , Galgon Anne
Published: May 2023

The objective of this study is to establish test-retest reliability and minimal detectable change (MDC) of the timed up and go (TUG) test in older adults with peripheral vestibular hypofunction. A pragmatic descriptive design was used on the data collected on 16 patients. Inclusion criteria were age 65 years or older evaluated in physical therapy for symptoms
of dizziness and/or postural instability, able to walk without the physical help of another person, and able to follow commands and perform the examination instructions in English. Exclusion criteria were unstable medical issues, orthostatic hypotension, uncontrolled metabolic disease; history of falls from syncopal origin; dizziness of central origin, active benign paroxysmal positional vertigo, and inability to walk without physical assistance. After the patients gave informed consent and met the inclusion criteria, the patients performed one practice trial followed by two final performances of the TUG that were included in the data analysis. The TUG test measures the time it takes to stand up from a chair, walk three meters, turn around, get back to the chair, and sit down. The TUG showed excellent reliability. TUG has small values for both standard error of measurement (0.46 seconds) and MDC90 (1.07 seconds). The generalization of results of TUG test-retest is limited among the older adults with subacute and chronic peripheral vestibular hypofunction. The test-retest reliability of the TUG for older adults with peripheral vestibular hypofunction is equivalent to that of older adults with other conditions.
Centrifuge modelling of an energy pile group with groundwater flow
Authors: Ouzzine Badr , de Sauvage Jean , Madabhushi Gopal , Viggiani Giulia , Reiffsteck Philippe
Published: May 2023

For several decades, energy piles have been developed to extract heat from the ground by using foundation piles as heat exchangers. However, the thermal loading of these piles directly affects their mechanical behaviour. Centrifuge modelling of a thermally loaded pile group within a groundwater flow makes it possible to improve the understanding of the hydro-thermo-mechanical behaviour of this type of foundation. In this study, groundwater flow was established in a centrifuge model to study an energy pile group. The focus of this study was to enhance research findings on energy geo-structures such as foundations, which are very often located in soil with seepage. The groundwater flow allows reduction of thermomechanical effects and therefore plays the role as a stress and deformation stabiliser in addition to favouring the thermal recharge of the soil.
Corrosion testing of domestically produced baddeleyitecorundum and chromium-containing materials in borosilicate glass melts
Authors: Shaydullin S. M. , Remizov M. B. , Kozlov P. V. , Dubkov S. A. , Pechenkina М. V. , Kochkina G. V.
Published: May 2023

Practical importance of corrosion and erosion resistance of refractories was justified for the design of furnaces with direct electric heating that are used for vitrification of high-level waste (HLW). The main promising materials are listed, and the algorithm of assessment of their resistance to the effects of borosilicate melts is given for the operating conditions of electric furnaces. Corrosion testing of refractories was carried out under static and dynamic conditions in a low-melting borosilicate glass melt and in a borosilicate glass melt containing simulated liquid HLW. Refractory materials were selected that have the highest resistance in a glass melt under conditions of HLW immobilization. The testing results will be used for choosing lining material in the design of removable and small-scale melters. Ill. 5. Ref. 11. Tab. 3.
Formation and properties of block vanadium SiO2 nanomaterial catalyst for SO2 oxidation
Authors: Vanchurin V. I. , Belyakov A. V. , Petrov A. Yu.
Published: May 2023

A method for producing a block vanadium catalyst for the oxidation of sulfur dioxide has been studied, which includes the stage of preparing a honeycomb structure framework based on silica raw materials in the form of white soot, followed by applying a substrate in the form of amorphous silicon dioxide and an active component to the surface of the channels. Data on the structural and mechanical properties of the honeycomb catalyst paste have been obtained. A mode of heat treatment of molded products with the production of mechanically strong blocks as carriers of the vanadium catalyst is proposed. Information about the performance of a block vanadium catalyst in comparison with an industrial catalyst of a granular form is given. Ill. 4. Ref. 14. Tab. 1.
Material composition and microstructure of ceramic glass й hearth of blast furnace No. 6 of JSC EVRAZ NTMK after service. Refractory microstructure after service
Authors: Perepelitsyn V. A. , Zemlyanoi K. G. , Mironov K. V. , Forshev A. A. , Nikolaev F. P. , Sushnikov D. V.
Published: May 2023

The results of a comprehensive study of the material microstructure of refractory samples after service in the furnace of a blast furnace with a useful volume of 2200 m3 for 14 years are presented. Structural and genetic analysis established a characteristic sequence of processes of degeneration and wear of the ceramic furnace stack, including 6 stages: the formation of micro-and macro-cracks; condensation of vaporous zinc; zinc oxidation with the formation of fire-resistant ZnO zincite and the deposition of carbon black by the; chemical interaction of zinkite with mullite and corundum to form ZnAl2O4 ganite and 2ZnO·SiO2 willemite; partial oxidation of silicon carbide with the release of silica glass SiO2, eutectic melt of complex composition, and wellimite. Due to intensive accumulation of capillary pores, infiltration of the slag melt in the volume of refractories does not occur. Wear of refractories in the furnace has a complex, mainly thermochemical mechanism and a low speed due to the formation of a garnish containing refractory compounds. Ill. 5. Ref. 14.
Influence of pulsed laser mode on ablation and modification processes of Si3N4‒ТiC ceramics surface layer
Authors: Kuzin V. V.
Published: May 2023

The influence of pulsed laser treatment mode parameters on ablation and modification processes of Si3N4‒ТiС ceramics is determined. Using the revealed interrelations a mode of pulsed laser processing after diamond grinding of Si3N4‒TiC ceramic parts is established and recommended for practical use, which ensures the defective layer removal and defectfree structure formation in the surface layer. Ill. 5. Ref. 31.
High-temperature plastic deformation of MgO-products
Authors: Datsko I. A.
Published: May 2023

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The variant of using precipitation water treatment for the production of building and ceramic materials
Authors: Davidov S. Ya. , Apakashev R. A. , Oleynikova L. N.
Published: May 2023

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Assessment of reliability and technical risks in the operation of heat engineering units
Authors: Aripova N. M. , Nikiforov A. S. , Paramonov A. M. , Prikhod’ko A. M. , Kinzhibekova A. K. , Karmanov A. E.
Published: May 2023

Приведен способ оценки технических рисков, возникающих при работе теплотехнических агрегатов. Оценка рисков производится на основе данных об остаточном ресурсе футеровки агрегата и оценки степени тяжести последствий аварии. Для получения первичных данных при оценке остаточного ресурса применяется приборный метод, который позволяет вести непрерывный мониторинг теплового состояния футеровки. При этом определяющий фактор разрушения ― термомеханические напряжения, превышающие предел прочности материала, которые рассчитываются по разработанной схеме на основе численных методов.
The effect of nursing work environment on slow nursing among long-term care hospital nurses: A descriptive study
Authors: Woo Hyeon-mi
Published: May 2023

Purpose: This study aimed to examine the impact of the nursing work environment on slow nursing care by nurses in long-term care hospital. Methods: The participants in this study were 117 nurses who had worked for more than 6 months in long-term care hospitals in Daegu city or Gyeongbuk province. Data were collected from February 10 to 28, 2023, comprising general characteristics, slow nursing care, and nursing work environment. Data were analyzed using descriptive statistics, a t-test, one-way ANOVA, Pearson's correlation, and multiple regression analysis using the IBM SPSS 22.0 program. Results: A significant positive correlation was observed between slow nursing care and the nursing work environment (r=.42, p<.001). In a hierarchical regression analysis, the nursing work environment accounted for 33% (F=8.12, p<.001) of the variance in slow nursing care among nurses in long-term care hospitals. Conclusion: The findings suggest that an optimal nursing work environment is crucial to enhance the delivery of slow nursing care in long-term care hospitals. Hence, it is recommended to develop an educational program
An Analysis of the Effects of the Income Level of the Family Caregivers for the Recipients in Long-Term Care facilities on the Willingness to Pay for Use of Better Services: A cross-sectional study
Authors: Kwon Jinhee , Han Eun-Jeong , Kim Hyun Ki
Published: May 2023

Purpose: The purpose of this study is to confirm how the income level of the family caregivers for recipients in long-term care (LTC) facilities are related to family caregivers’ willingness to pay out-of-pocket payments for better LTC services. Methods: This study used the 2021 survey data on cost sharing in LTC facilities, which surveyed 1,111 family caregivers of recipients. To analyze the effect of the income level of family caregivers on the willingness to pay out-of-pocket payments for better LTC services, a chi-square test, a Cochran-Mantel-Haenszel test, and a logistic regression analysis were performed. Results: We found that 39.0% of respondents were willing to pay out-of-pocket payments if better services were available to recipients. Adjusted for recipient’s and family caregivers’ variables, characteristics of out-of-pocket payment, and LTC service use, the willingness to pay in the monthly household income level of 5 million won and more was 3.28 times higher than those in the monthly household income level of less than 1 million won (95% confidence level=1.93~5.55, p<.001). As monthly household income rises, the odds ratio of willingness to pay tended to increase (p<.001). Conclusion: Family caregivers who bear the out-of-pocket payments of LTC facilities are willing to pay more for better LTC services. In addition, the higher the income level of family caregivers, the higher their willingness to pay. A full-scale review of the system reform is needed to prevent out-of-pocket payments from becoming an economic barrier to service users and to contribute to service quality improvement and financial stability.
Practice and improvement plans of the tailored dementia case management in local dementia centers: A qualitative study using focus group
Authors: Kim Jiyeon , Song Jun-Ah , Jung Sua , Kim Jiyeon , Kim Sunhee
Published: May 2023

Purpose: With the nationwide expansion of local dementia centers (LDCs) after the National Responsibility for Dementia System, the number of tailored dementia case management (TDCM) programs increased significantly, but qualitative improvement in TDCM is still a remaining task. The purpose of this study was to explore the current practice of the TDCM in LDCs and suggest directions for future program improvement. Methods: A focus group interview was conducted with seven hands-on workers who had experience in TDCM at the LDCs. Participants (mean age=40 years old) were nurses, social workers, and occupational therapists with an average of 9.1 years of working experience in TDCM. Data were analyzed using qualitative content analysis. Results: The results were summarized into three core themes and fourteen sub-themes. The three core themes were ‘Job Characteristics of TDCM’, ‘Barriers to the effective operation of TDCM’, and ‘Improvement plans for successful TDCM’. Conclusion: To establish the function and role of TDCM within the domestic dementia management system, we propose five areas for improvement: 1) Developing a standardized TDCM manual; 2) Quantitative and qualitative expansion of case manager working capacity; 3) Activating a multidisciplinary team approach; 4) Forming a collaborative network between related organizations and local community councils; 5) Active promotion of TDCM.
Influence of cognitive function and social support on health-related quality of life of elderly men in partial medically underserved rural areas: A cross-sectional study
Authors: Hwang Min Hye , Lee Hye Kyung
Published: May 2023

Purpose: This study aimed to identify factors influencing the health-related quality of life of elderly men in partial medically underserved rural areas. Methods: The subjects included 182 elderly men aged 65 or older living in the jurisdictions of the Health Care Centers in G, I, and J Myeon, which were medically underserved rural areas in Gongju City, South Korea. Data were collected on October 31 to November 1, 2020, and were analyzed with descriptive statistics, t-test, ANOVA, Scheffé test, Pearson’s correlation coefficient, and hierarchical linear regression. Results: The subjects’ scored mean 24.20±3.29 points out of 30 in cognitive functions and mean 17.08±9.40 out of 60 in social support. The influential factors included three chronic diseases (β=-.50, p<.001), two chronic diseases (β=-.30, p<.001), one chronic disease (β=-.21, p<.001); fair subjective health status (β=.24, p<.001); good subjective health status (β=.25, p<.001); cognitive functions (β=.17, p=.004); aged 80 or older (β=-.16, p=.006); and brushing teeth three times per day or more (β=.14, p=.009) with an explanatory power of 53.8%. Conclusion: It is necessary to develop chronic disease management and cognitive function enhancement programs to identify factors influencing the health-related quality of life of elderly men in partial medically underserved rural areas and thus improve their health-related quality of life.
Family caregivers’ perceived value of caring for older patient: A hybrid model of concept analysis
Authors: Heo Seon-Hye , Kim Hye-Ryoung
Published: May 2023

Purpose: The purpose of this study was to define and clarify the concept of the family caregivers’ perceived value of caring for older patients. Methods: The hybrid model of Schwartz-Barcott and Kim was used to perform the concept analysis of perceived value of caring. Concept analysis was conducted in three phases: the theoretical phase, fieldwork phase, and final analysis phase. Results: The perceived value of caring was found to have four dimensions and nine attributes. The providing care dimension consisted of two attributes—care behavior and care attitude—and the goals and expectation dimension included three attributes—social norms, family norms, and personal norms. The other two dimensions consisted of two attributes each: a belief in usefulness and a belief in meaning in the building beliefs dimension and life expansion and insight into the future in the suffering sublimation dimension. Finally, perceived value of caring can be defined as the personal belief that behavior or attitude of providing physical, mental, and social services to those in need of care is usefulness and important based on one’s goals and criteria, and with the personal effort of sublimating suffering that arises from care. Conclusion: Based on the study findings, it is suggested that the use of the perceived value of caring should expand in nursing phenomena.
Factors influencing cognitive decline in living alone by the residence characteristics: A longitudinal study
Authors: Lee Yun Hee , Hong Gwi-Ryung Son
Published: May 2023

Purpose: This study aimed to identify the risk factors of cognitive decline in older adults living alone in local communities and to find cognitive nursing methods by the area of residence. Methods: The participants were 164 people living alone for 12 years. The data were analyzed using a generalized estimating equations method. Results: The following factors were identified as statistically significant predictors that increased cognitive decline in older adults living alone: 1) rural areas: age (odds ratio [OR]=1.02, 95% confidence interval [CI]=1.01~1.02), low education (OR=1.53, 95% CI=1.13~2.07), number of diseases (OR=1.07, 95% CI=1.01~1.14), 2) urban areas: women (OR=1.27, 95% CI=1.09~1.49), age (OR=1.02, 95% CI=1.01~1.03), low education (OR=1.26, 95% CI=1.14~1.40), body mass index (OR=0.98, 95% CI=0.96~0.99), instrumental activities of daily living (OR=1.02, 95% CI=1.00~1.04), depressive symptom (OR=1.14, 95% CI=1.03~1.25). Conclusion: The older adults who lived alone had different risk factors for cognitive decline depending on their areas of residence. Preventive management for cognitive decline should be presented according to the areas of residence among older adults living alone.
Herbage yield and quality of 12 Urochloa cultivars and lines in Northeast Thailand
Authors: Hare Michael D.
Published: May 2023

Forage accumulation yields and nutritive value of 12 Urochloa cultivars and pre-commercial lines (Mulato II, Cayman, Cobra, Marandu, Toledo, BRS Piatã, BRS Paiaguás, Ruzi, Humidicola, BRO4/3025, BRO4/3207 and BRO4/2515) were evaluated in a field trial in Northeast Thailand during 2015–2018. Total herbage yields for cultivars and lines over 3 years ranged from 15,800 kg DM/ha (Ruzi) to 33,800 kg DM/ha (Toledo). Toledo produced the highest total biomass across the 3 wet and dry seasons. BRS Piatã and BRS Paiaguás showed good performance, out-yielding Ruzi and Mulato II in total DM in both wet and dry seasons. The 6 hybrid Urochloa cultivars/lines (Mulato II, Cayman, Cobra, BRO4/3025, BRO4/3207 and BRO4/2515) all accumulated similar total DM yields over 3 years, outyielding Ruzi (P<0.05). Crude protein concentrations in forage were higher (P<0.05) in the dry season than wet season and in leaf than stem. In the second and third dry seasons, Ruzi had higher CP concentrations in both leaf and stem than all other cultivars and lines. ADF and NDF concentrations were lower in the dry season than the wet season. This trial has shown that BRS Piatá and BRS Paiaguãs would be ideal replacements for Mulato II and Ruzi in Northeast Thailand because of their superior dry season production for smallholder farmers for either cut-and-carry forage or grazing.
Efecto a largo plazo del pastoreo rotacional en Urochloa brizantha cv. Marandú sobre indicadores de calidad del suelo
Authors: Florida Rofner Nelino , Abad Principe Rober Miler , Rengifo-Rojas Alex , Nazar Cipriano Javier
Published: May 2023

La crianza de ganado bovino es una actividad importante en Perú, con sistemas de producción diferenciados por el propósito, condiciones edafoclimáticas y prácticas de manejo de las pasturas. En la finca Ruiz, distrito Codo del Pozuzo (Huánuco, Perú), se evaluó el efecto del pastoreo por varios años sobre la calidad del suelo a través de indicadores físicos (textura y resistencia a la penetración), y químicos (pH, MO, N, P, K+, Ca2+, Mg2+, Al3+, CIC, saturación de bases, acidez cambiable y saturación de aluminio), en potreros de pasto Urochloa (syn. Brachiaria) brizantha cv. Marandú manejados por 10 (PU10), 20 (PU20), 30 (PU30) y 40 años (PU40), y en un bosque secundario (BS) contiguo como referencia. Los datos se analizaron con estadística descriptiva, multivariada y a través de modelos de regresión lineal múltiple. La resistencia a la penetración en el suelo tendió a incrementar en el tiempo, y se detectaron diferencias para todos los indicadores químicos, excepto el pH y Al3+. La transformación del bosque en áreas de pasturas afectó negativamente los niveles de pH, K+, Ca2+, Mg2+, y CIC y elevó el contenido de Al3+. Los resultados sugieren que el sistema de manejo del pastoreo aplicado hasta por 40 años en la finca bajo estudio resultó en compactación, pérdida de bases cambiables y toxicidad por aluminio en el suelo. Se requiere estudios adicionales para determinar cuál sería el efecto del manejo racional del pastoreo considerando la capacidad de carga, así como el tratamiento con arado y fertilización, para mitigar el efecto del pisoteo, revertir la compactación, mejorar la disponibilidad de nutrientes y reducir la concentración de Al3+ en el suelo.
Palatabilidad relativa de leñosas forrajeras representativas del bosque seco tropical utilizando un método de cafetería
Authors: Pérez-Almario Nelson , Mora-Delgado Jairo , Criollo-Cruz Dagoberto , Carvajal-Bazurto Christian Thomas , Moreno-Turriago Jorge Mario , Orjuela-Franco Oscar Eduardo
Published: May 2023

Para la selección de las especies leñosas forrajeras a ser consideradas en sistemas de ganadería practicados en el ecosistema de bosque seco tropical de Colombia, se propuso utilizar como criterio la palatabilidad relativa del forraje. Para ese fin se evaluaron 20 especies que poseen características nutricionales distintas. Las especies seleccionadas se manejaron bajo podas en parcelas establecidas en el Centro de Investigación Nataima de Agrosavia. Los forrajes de esas especies fueron ofrecidos durante 19 días a cinco bovinos Blanco Orejinegro (BON) adultos, utilizando un método de cafetería con pruebas cortas de tres minutos de duración. Las especies se asignaron en pares, con un total de 190 combinaciones por animal, producto de la combinación de 20 especies tomando dos a la vez, sin repetición. La palatabilidad relativa de los forrajes se definió en función del grado de ingesta por los animales. Los resultados de las pruebas de palatabilidad identificaron nueve especies de palatabilidad muy alta y alta, las que se ordenaron así en orden descendente: Albizia niopoides, Leucaena leucocephala, Erythrina fusca, Guazuma ulmifolia, Gliricidia sepium, Tithonia diversifolia, Clitoria fairchildiana, Spondias purpurea y Spondias mombin. El par de especies que mostró la palatabilidad más alta fue la combinación A. niopoides-L. leucocephala, y la especie que se mostró con mayor frecuencia en combinaciones con ingesta alta fue A. niopoides. Se concluye que existen varias especies nativas con alta palatabilidad relativa, cuyo potencial forrajero era desconocido por técnicos y ganaderos hasta ahora, y se ratificó la palatabilidad alta para algunas especies ya conocidas.
Data sharing: A Long COVID perspective, challenges, and road map for the future
Authors: Oladejo Sunday O. , Watson Liam R. , Watson Bruce W. , Rajaratnam Kanshukan , Kotze Maritha J. , Kell Douglas B. , Pretorius Etheresia
Published: May 2023

‘Long COVID’ is the term used to describe the phenomenon in which patients who have survived a COVID-19 infection continue to experience prolonged SARS-CoV-2 symptoms. Millions of people across the globe are affected by Long COVID. Solving the Long COVID conundrum will require drawing upon the lessons of the COVID-19 pandemic, during which thousands of experts across diverse disciplines such as epidemiology, genomics, medicine, data science, and computer science collaborated, sharing data and pooling resources to attack the problem from multiple angles. Thus far, there has been no global consensus on the definition, diagnosis, and most effective treatment of Long COVID. In this work, we examine the possible applications of data sharing and data science in general with a view to, ultimately, understand Long COVID in greater detail and hasten relief for the millions of people experiencing it. We examine the literature and investigate the current state, challenges, and opportunities of data sharing in Long COVID research.
Significance:
Although millions of people across the globe have been diagnosed with Long COVID, there still exist many research gaps in our understanding of the condition and its underlying causes. This work aims to elevate the discussion surrounding data sharing and data science in the research community and to engage data sharing as an enabler to fast-track the process of finding effective treatment for Long COVID.
Sur la phrase existentielle en có en vietnamien parlé
Authors: DAO Huy Linh , DO Nguyet Tu
Published: May 2023

Cette contribution se propose de regarder de plus près l’usage de la construction existentielle à base de có ‘avoir’ en vietnamien moderne à travers un corpus oral. Elle tente d’identifier et de décrire les éventuelles extensions structurelles dont peut s’enrichir la configuration minimale có + GN. Outre des cas d’ambiguïté catégorielle et fonctionnelle au sein de celle-ci, il a été observé que des expansions propositionnelles sont susceptibles de s’y greffer sur des modes allant de la subordination (relative et complétive) à la juxtaposition paratactique, en passant par une mise en relation médiatisée par l’élément copulatif là. Des emplois collocationnels et des phénomènes de pragmaticalisation de la construction existentielle ont été également abordés, suggérant une réévaluation du statut de cette dernière dans le répertoire grammatical de l’apprenant allophone de VLE.
STUDY OF DROPLET TRANSFER CHARACTERISTICS AND WELD FORMATION WITH ER430LNb FERRITIC STAINLESS STEEL DURING GAS METAL ARC WELDING
Authors: Liu Feng , Gu Yu , Xu Fanghong , Zhang Han , Xu Shaowei , Yan Zhihang , Yan Zhifeng , Wang Wenxian
Published: May 2023

An ER430LNb ferritic stainless steel wire was used for a gas metal arc welding (GMAW) test. The characteristics of droplet transfer and its corresponding voltage and current waveforms were investigated using a high-speed camera and synchronous acquisition of electrical signals. The weld formation, droplet transfer patterns and corresponding microstructures under different welding parameters were observed, and the effect of the current level on the droplet transfer frequency was discussed. As the results show, there were three typical metal transfer patterns during the GMAW using the ER430LNb ferritic stainless steel wire, namely short circuit transfer, mix transfer and spray transfer. With an increase in the welding current, the weld formation is changing constantly, and the droplet transfer frequency increases exponentially. With the change in the transfer pattern, the columnar ferrite structure of the weld is continuously coarsening. In addition, hardness measurements were taken on joints welded at different welding currents for comparison.
EFFECT OF ALKALINE SOLUTION CONCENTRATION ON THE PASSIVATION FILM OF Cu-Ni ALLOY
Authors: Li Yue , Zhao Shuyan , Zhang Xinyu , Zhang Shuo , Wu Xiaoliang , Wu Nianchu
Published: May 2023

Passive films formed on a Cu-Ni alloy in various concentrations of alkaline environment were investigated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy and the Mott–Schottky approach. The wide passivation range of the copper-nickel alloy was tested in alkaline solutions of three concentrations. The oxide film on the specimen has a p-type semiconductor property, while the flat band potential (EFB) decreased with increasing solution concentration. The film resistance of the passive films increased with increasing solution concentration. The pAassive films showed a duplex structure, including an inner layer of oxide (Cu2O, NiO) and an outer layer of hydroxide (Cu(OH)2, Ni(OH)2).
Performance characteristics and digestion of growing rabbits fed Corn Gluten Residue Meal (CGRM), Soybean Gluten Residue Meal (SGRM), and Sorghum Brewer Dry Grain (SBDG)
Authors: SK Ayandiran , I Adekunle
Published: May 2023

Context: Grain by-products are nonconventional feed resources that can be used as supplemental diets for rabbits, especially during the dry season when native forages are scarce and limiting in essential nutrients. Hence, this present study is to determine the inclusion of residue, Corn Gluten Residue Meal (CGRM), Soybean Gluten Residue Meal (SGRM), and Sorghum Brewer Dry Grain (SBDG) as a replacement for maize on the performance and digestion coefficient of growing rabbits. Methods: Forty mixed breeds of rabbits (4 - 6 weeks old) were allotted into four experimental treatments in a completely randomized design. Four experimental diets were then compounded by replacing maize (40% inclusion level) with CGRM, SGRM, and SBDG then fed to the growing rabbits at 3% of their body weight. Results: The crude protein contents of diets containing grain by-products (19.06% – 20.87%) were better than maize (12.96%). Evidently, the maize diet (55.56%) was higher in carbohydrate fraction than these grain by-product-containing diets (42.20 – 49.98). Rabbits fed diets containing grain by-products had significantly higher (p < 0.05) feed intake and final weight compared to rabbits fed maize. Rabbits-fed diets containing CGRM (87.41%) and SGRM (92.09%) were significantly higher (p < 0.05) in digestible crude protein than maize (76.79%) and SBDG (74.29%) diets. Also, diets containing maize and SGRM were significantly higher (p < 0.05) in the digestible carbohydrate fraction than diets. Whereas, rabbits fed diets CGRM and SBDG had significantly better (p < 0.05) nitrogen balance and retention compared to rabbits fed diet SGRM and maize. Conclusion: It could be concluded that the inclusion of CGRM, SGRM, and SBDG led to better performances and digestion but with inferior carbohydrate fractions and digestion percentages compared to the maize diet.
Dynamic Glucose-Stimulated Insulin Secretion using Biorep Perifusion Machine (ver peri4.2) - Human or Mouse Islets v1
Authors: F Spigelman Aliya
Published: May 2023

General protocol for Dynamic Glucose-Stimulated Insulin Secretion using Biorep Perifusion Machine - Human or Mouse Islets.
Prime Editing in Physcomitrium patens v1
Authors: Pierre-François Perroud not provided
Published: May 2023

PEG-mediated naked DNA protoplast transfection has been the standard transformation approach for more than thirty years in the moss Physcomitrium patens. The advent of the CRISPR-Cas technology has given a new opportunity for this approach in moss and other plants. Recently, the Prime Editing, a CRISPR-Cas9 based approach combining the efficiency of genome searching of the nCas9, its association with a Reverse Transcriptase and the encoding of desired edit in 3' of the guide RNA has allowed the specific edition of any base-pair in the vicinity of the Streptococcus pyogenes Cas9 PAM –NGG . We present here a complete procedure of Prime Editing in P. patens starting from the production of the optimal tissue to obtain protoplasts, followed by generation of protoplasts, their transfection using PEG-mediated naked DNA and their subsequent regeneration. Finally we describe two modes of selection based on the choice of edited gene target. The direct selection mode is dedicated to the selection of edits generating a loss of function of the PpAPT gene that can be selected directly after regeneration on 2-Fluoroadenine-containing medium. The indirect selection mode allows for the pre-selection of transfected protoplast with an antibiotic independently of the targeted gene, the screen for the proper edit being identified after genotyping of the selected plants.
The Application of The Word "Lembaga" Method In Improving The Articulation Ability of Hearing Impairment in Second Grade of Elementary Special School Sumbersari
Authors: Rusyani Endang , Sabrina Fika Annisa , Ragadhita Risti
Published: May 2023

The purpose of this study was to determine the effect of the application of the word method for the "LEMBAGA" word on improving the articulation ability to hear impairment students in the second grade of elementary special school. This study uses the Single Subject Research (SSR) method with an A-B-A design on one elementary special school student with a hearing impairment student. The learning method begins with the introduction of a particular word. This word is then broken down into syllables, syllables into letters. Next, letters are the process of arranging letters into syllables and syllables into words. The results showed that there was an increase in the child's articulation ability before and after the intervention was given. The application of the word "Lembaga" method is used by showing children how to write a word and a picture of the word, thus children are more interested in participating in learning.
Impact of Gardening on Physical and Mental Health in The Midst of Covid-19 Pandemic
Authors: Coyoca Merrychelle Bebs P. , Rosario May-Ann B. Del , Lazo Jean Rose L. , Jr. Vivencio L. Calixtro , Edaño Lilibeth B.
Published: May 2023

The study aimed to determine the impact of gardening on the physical and mental health amidst pandemics. The study employed a descriptive design and the survey questionnaire was used for gathering data. There were 60 respondents with ages of 18 to 65 years old who are residing in Barangay Maibo, Tantangan South Cotabato. The gathered data were treated using a statistical tool such as mean, frequency, and percentage. The study revealed that the impact of gardening on physical health strongly agreed with the grand mean of 4.22 and the mental health was agreed with the grand mean of 4.10. Based on the findings, it is concluded that gardening has an impact on physical and mental health. The researchers highly recommend conducting programs for people to avoid anxiety and depression. The students are also encouraged to engage themselves in gardening to boost their physical and mental health.
Psychological Study of Stress Levels among Secondary School Students with Albinism in Tanzania
Authors: Mwala George , Lyakurwa Suitbert
Published: May 2023

This study investigated the psychological situation of secondary school students with albinism in Tanzania. Particularly, the study focuses on the levels of stress among students with albinism. The study was approached quantitatively and a sample of 80 students with albinism in the Shinyanga region in Tanzania was surveyed. Data were collected using questionnaires and analyzed by frequencies and percentages. Further, a t-test was used to test the hypothesis. The results indicated that 52.6% had the highest, 37.53% had moderate and 21.48% had the lowest level of stress. However, in terms of sex, male students demonstrated a bit higher level of stress than female students and differed significantly. It is concluded that in general, secondary school students with albinism had a moderate level of stress. The findings inform education stakeholders to incorporate training and counseling services to assist students in addressing the levels of stress.