bluuebunny/crossref_metadata_2025 huggingface dataset:
How STEAM is a Chemistry textbook for class XI of a public high school in Surakarta
Authors: Rahma Durrotunnisa Fathia , Ariani Sri Retno Dwi , Masykuri Mohammad
Published: March 2023

This study aims to analyze the content of the STEAM aspect in the chemistry textbook for class XI. The research method used is descriptive qualitative. Data collection in this study used content analysis techniques. The sampling technique used is purposive sampling. The data sources used are the Chemistry Book for SMA/MA Class XI Specialization in Mathematics and Natural Sciences published by Erlangga in 2016 as book A, Experiment-based Chemistry Student Book published by Tiga Serangkai in 2014 as book B, and Chemistry Student Books for SMA/MA Class XI publisher Intan Pariwara in 2016 as book C. Basic Competencies analyzed in the three books, namely Hydrocarbon Compounds and Petroleum represent KD which are conceptual-theoretical, Reaction Rate represents KD which is mathematical, and Chemical Equilibrium represents KD which is abstract-complex. The results showed that books A, B, and C already contained all aspects of STEAM in various basic competencies. The contents of STEAM aspects in book A are 80 statements, book B are 85 statements, and book C are 121 statements. In Books A and C, the aspects of STEAM that are mostly covered are the mathematical aspects, while the aspects that are mostly published in Book B are the science aspects. The aspects of STEAM that are least contained in books A and B are the artistic aspects, while in book C are the technical and artistic aspects. Thus, in books A, B, and C, the artistic aspect has a low amount of load. Research on the content of STEAM and HOTS aspects needs to be carried out in more depth with a different approach regarding the integration of STEAM and HOTS aspects, especially in textbooks and other learning resources.
Role of luteinizing and follicle-stimulating hormones in women diagnosed with polycystic ovary syndrome
Authors:   Department of Obstetrics and Gynecology, College of Medicine, King Khalid University Hospital, Riyadh, Saudi Arabia, Al-Mutawa Johara
Published: March 2023

The aim of this study was to investigate the relationship between luteinizing hormone (LH) and follicle-stimulating hormone (FSH) levels in women diagnosed with polycystic ovary syndrome (PCOS) in Saudi Arabia and to compare obesity levels. In this case-control study, 101 PCOS women and 54 control subjects were enrolled in King Khalid University Hospital. Based on Rotterdam criteria, PCOS women were enrolled. Anthropometric measurements were collected between PCOS and control women. ANOVA analysis was performed in PCOS women to measure the PCOS variables. The study results demonstrate that LH levels are significantly associated with PCOS women (p=0.06). ANOVA analysis indicated that age (p=0.001) and LH (p=0.05) were significantly related among the age groups. The weight, height, and BMI were significantly associated in PCOS women among PCOS subjects with obesity (p<0.05). This study concludes as LH and FSH levels were high in PCOS women with different forms of obesity and LH is correlated (p=0.06) between PCOS and control women. Additionally, elevated BMI levels were not associated with LH and FSH levels.
Влияние дислокационных диполей с разным плечом на деформационное поведение графена: молекулярная динамика
Authors: Ахунова А.Х. , Баимова Ю.А.
Published: March 2023

The molecular dynamics simulation is used to analyze the features of the deformation behavior and the process of fracture of graphene with dislocation dipoles with different arm. Moreover, the wrinkling of graphene during deformation is taken into account, which greatly reduces the strength of graphene. It has been established that an increase in temperature slightly affects the mechanical properties of graphene with dislocation dipoles, in contrast to defect-free graphene and graphene with a Stone–Wales defect. It is shown that a change in the distance between dislocations in a dipole does not significantly affect the elastic modulus and graphene strength. However, the presence of dislocation dipoles can affect graphene wrinkling during stretching.
Характеристики матричного катода из карбида кремния в предпробойных и пробойных условиях
Authors: Морозов В.А. , Егоров Н.В. , Трофимов В.В. , Никифоров К.А. , Закиров И.И. , Кац В.М. , Ильин В.А. , Иванов А.С.
Published: March 2023

This study assesses promising field electron sources based on silicon carbide monolithic field emission array (FEA). FEA is fabricated on single-crystal wafers of silicon carbide (0001C) 6H-SiC of n-type conductivity using the technology of two-stage reactive ion etching in SF6/O2/Ar atmosphere. To implement conditions close to breakdown, an experimental setup based on high-voltage narrow pulses generating device GKVI-300 was used. A series of nanosecond voltage pulses with amplitudes from 120 to 250 kV was generated. To study the characteristics of the FEA in the pre-breakdown state, the beam of field emitted electrons was separated from the ion torch or cathode plasma, formed in the following breakdown phases, by placing a 50-μm-thick titanium foil under zero potential into the interelectrode gap. Current-voltage characteristics of peak-currents vs. peak-voltages passing through the foil are close to rectilinear in the Fowler-Nordheim coordinates. The current-voltage characteristics plotted for each of the pulses along increasing and decreasing branches show a discrepancy (hysteresis). After the experiments, the silicon carbide cathode FEA was studied in a scanning electron microscope.
Departamento de Casanare: anexo 6
Authors: Galindo Yeimy Paola , Mateus Rodríguez Julián Fernando , Osorio Cardona Jairo Antonio , Rivero Espitia Tatiana , García Gómez Gustavo , Rincón N. Rubiela , Garnica Felipe , Barbosa Stella , Valencia Rubén Alfredo
Published: March 2023

El presente documento se preparó con el fin de proveer información básica sobre el desempeño de la cadena productiva, sus vínculos con la orientación de la ciencia, la tecnología y la innovación y las demandas del sector sobre conocimiento técnico, para superar problemas productivos, mejorar la competitividad, la sostenibilidad, aprovechar oportunidades de mercado, potenciar capacidades y focalizar la inversión pública. Esta información se consolidó a través del proceso de revisión y ajuste de la Agenda Dinámica Nacional de Investigación, Desarrollo Tecnológico e Innovación (Agenda I+D+i), como insumo para orientar las estrategias del PECTIA.
Departamento de Atlántico : anexo 6
Authors: Hernández Villamizar Anaís Cristina , Sánchez Germán David , Osorio Jairo Antonio , Moreno Valderrama María Nancy , Vila Flórez Otto , Alvarado Juan Rodrigo , Pérez Velásquez Juan Carlos
Published: March 2023

El presente documento se preparó con el fin de proveer información básica departamental sobre el desempeño sectorial, sus vínculos con la orientación de la ciencia, la tecnología y la innovación y las demandas del sector sobre conocimiento técnico para focalizar la inversión pública, articular capacidades, superar problemas productivos, mejorar la competitividad y aprovechar oportunidades de mercado en las cadenas productivas priorizadas. Esta información se consolidó a través del proceso de revisión y ajuste de la Agenda Dinámica Nacional de Investigación, Desarrollo Tecnológico e Innovación (Agenda I+D+i), como insumo para orientar las estrategias del PECTIA en el ámbito departamental.
Actualización del Plan Estratégico de Ciencia, Tecnología, e Innovación del sector Agropecuario PECTIA 2017 - 2027 : Departamento de Córdoba 2022
Authors:   Ministerio de Agricultura y Desarrollo Rural, Bogotá (Colombia),   Gobernación de Córdoba (Colombia),   Secretaría de Desarrollo Económico y Agroindustrial, Córdoba (Colombia),   Corporación colombiana de investigación agropecuaria, Mosquera (Colombia)
Published: March 2023

La actualización del Plan Estratégico de Ciencia, Tecnología e Innovación del sector Agropecuario Colombiano – Pectia de Córdoba fue posible gracias al liderazgo de la Mesa de Ciencia, Tecnología e Innovación Agropecuaria (Mesa de CTIA) en cabeza de la Secretario de Desarrollo Económico y Agroindustrial, la Comisión Regional de Competitividad e Innovación (CRCI) de Córdoba; el direccionamiento del Ministerio de Agricultura y Desarrollo Rural (MADR); el apoyo del Ministerio de Ciencia, Tecnología e Innovación (MinCiencias); el acompañamiento metodológico de la Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA) y el trabajo colaborativo de instancias y actores como entidades de investigación, centros de investigación y desarrollo tecnológico agropecuario, universidades, gremios y productores agropecuarios, empresas, entidades de apoyo públicas y privadas, entre otras; que representan el Sistema Nacional de Innovación Agropecuaria (SNIA) en el departamento.
Actualización del Plan Estratégico de Ciencia, Tecnología, e Innovación del sector Agropecuario PECTIA 2017 - 2027 : Departamento de Sucre 2022
Authors:   Ministerio de Agricultura y Desarrollo Rural, Sucre (Colombia),   Gobernación del Sucre (Colombia),   Comisión Regional de Competitividad de Sucre (Colombia),   Corporación colombiana de investigación agropecuaria (Colombia)
Published: March 2023

Las principales actividades económicas que contribuyen al PIB en el departamento de Sucre son administración pública y defensa (32,7 %); comercio hoteles y reparación (18,5 %) y en tercer lugar la agricultura, ganadería y pesca (9,6 %) (DANE, 2022). La vocación se concentró en producción pecuaria con un 69,95 % (763.661 ha), seguido de los cuerpos de agua con un 14,17 % (154.702 ha), mientras que, para uso agrícola solamente se destina un 9,67 % (105.514 ha). Asimismo, se observa que el uso del suelo para fines pecuarios aumentó en un 0.62 % de 2016 a 2018 (6.745 ha), mientras que para uso agrícola disminuyó un 1,69 % de 2016 a 2018 (18.493 ha). Los bosques también han evidenciado disminución de un 0,38 % entre 2016 a 2018 (4.176 ha), mientras que los cuerpos de agua han incrementado un 1,89 % entre 2016 a 2018 (20.613 ha) (UPRA, 2022).
Manejo fitosanitario: Manejo de enfermedades
Authors: Aguilar Aguilar Paula Andrea , Velásquez Arroyo Carlos Enrique , Dominguez Pulgarín Cristian , Latorre Gonzalez Michael Ángel , Mira Herrera Rosa Helen
Published: March 2023

Recomendaciones para el control de las enfermedades
Early Triage of Critically Ill Adult Patients With Mushroom Poisoning: Machine Learning Approach
Authors: Liu Yuxuan , Lyu Xiaoguang , Yang Bo , Fang Zhixiang , Hu Dejun , Shi Lei , Wu Bisheng , Tian Yong , Zhang Enli , Yang YuanChao
Published: March 2023

Background

Early triage of patients with mushroom poisoning is essential for administering precise treatment and reducing mortality. To our knowledge, there has been no established method to triage patients with mushroom poisoning based on clinical data.

Objective

The purpose of this work was to construct a triage system to identify patients with mushroom poisoning based on clinical indicators using several machine learning approaches and to assess the prediction accuracy of these strategies.

Methods

In all, 567 patients were collected from 5 primary care hospitals and facilities in Enshi, Hubei Province, China, and divided into 2 groups; 322 patients from 2 hospitals were used as the training cohort, and 245 patients from 3 hospitals were used as the test cohort. Four machine learning algorithms were used to construct the triage model for patients with mushroom poisoning. Performance was assessed using the area under the receiver operating characteristic curve (AUC), decision curve, sensitivity, specificity, and other representative statistics. Feature contributions were evaluated using Shapley additive explanations.

Results

Among several machine learning algorithms, extreme gradient boosting (XGBoost) showed the best discriminative ability in 5-fold cross-validation (AUC=0.83, 95% CI 0.77-0.90) and the test set (AUC=0.90, 95% CI 0.83-0.96). In the test set, the XGBoost model had a sensitivity of 0.93 (95% CI 0.81-0.99) and a specificity of 0.79 (95% CI 0.73-0.85), whereas the physicians’ assessment had a sensitivity of 0.86 (95% CI 0.72-0.95) and a specificity of 0.66 (95% CI 0.59-0.73).

Conclusions

The 14-factor XGBoost model for the early triage of mushroom poisoning can rapidly and accurately identify critically ill patients and will possibly serve as an important basis for the selection of treatment options and referral of patients, potentially reducing patient mortality and improving clinical outcomes.
Understanding Older Adults’ Experiences With Technologies for Health Self-management: Interview Study (Preprint)
Authors: Garcia Reyes Elsy Paola , Kelly Ryan , Buchanan George , Waycott Jenny
Published: March 2023

BACKGROUND

Many older adults now use technologies such as wearable devices and telehealth services to support their health and well-being while living independently at home. However, older adults vary in how they use these technologies, and there is a lack of knowledge regarding the motivations that influence their acceptance and use of health-related technologies in home environments.

OBJECTIVE

This study aimed to understand the types of technologies that older adults use to support their health and the factors that motivate them to use their chosen technologies to support their health. In addition, we aimed to understand the factors that enable the effective use of technologies for health self-management and to identify the barriers that can negatively affect the adoption of technologies.

METHODS

A total of 22 older adults participated in semistructured interviews regarding their experiences of using technologies for health self-management. Interview transcripts were analyzed through an in-depth thematic analysis.

RESULTS

The interviews revealed that a range of technologies, such as videoconferencing software, fitness trackers, and other devices, were being used by older adults to support their health. Interviews showed that participants were motivated to use technologies to monitor health issues, to stay active and connected, and to record and change their behavior in the light of foreseen risks related to their future health status. Enablers that facilitated the effective use of technologies include social and organizational influence, convenient access to health care and safety provided by the technology, and easy setup and low cost of the technology. Barriers include information overload and a sense of futility about future health decline; telehealth being an inadequate substitute for in-person consultation; concerns about trust related to privacy and accuracy; and technologies being stigmatizing, uncomfortable to use, expensive, and unfamiliar.

CONCLUSIONS

This study suggested that older adults were using a variety of technologies to prevent or prepare for future health decline, evidencing a resilient attitude toward health and aging. In addition, older adults were willing to continue using the technology when there was a perceived need. The enabler mentioned by most participants was the social and organizational influence that included health care staff, family, friends, and organizations. This analysis provides a better understanding of how older adults use technologies to support their health and can guide the provision of appropriate health technologies for them.
Вивчення розподілу напружень моделі заднього міжхребцевого спондилодезу поперекового відділу хребта (імплантат PEEK і дистракційний кейдж)
Authors: Stognii A.V. , Pyatikop V.O. , Yaresko O.V. , Popsuyshapka K.O. , Pidgayska O.O. , Karpinsky M.Yu.
Published: March 2023

Актуальність. Існує широкий спектр конструкцій і видів матеріалів кейджів для спинномозкових імплантатів, які можуть використовуватися при спондилодезі хребта, але імплантати часто викликають ушкодження замикальної пластини, що може призвести до травми й біомеханічної нестабільності. Існує чотири різних типи матеріалів, які використовують для виготовлення кейджа: металевий, керамічний, полімерний і композитний. Мета: проаналізувати напружено-деформований стан нового міжтілового опорного пристрою і порівняти його з міжтіловою опорою з матеріалу PEEK хребетного блоку L5-S1 і заднього спондилодезу. Матеріали та методи. Була використана інтактна модель таза з крижем і блоком хребців L3-L5. У модель були внесені наступні зміни: міжхребцевий диск L5-S1 був замінений стандартною міжтіловою опорою з матеріалу PEEK. Задній спондилодез L4-S1; міжхребцевий диск L5-S1 був замінений новою міжтіловою опорою. Задній спондилодез L4-S1. Без урахування ваги нижніх кінцівок на верхню поверхню тіла хребця L3 і його суглобові відростки прикладали силу в 422 Н. Результати. Напруження в хребцях L3 і L4 практично не відрізняються від показників моделі в нормі незалежно від типу міжтілової опори. У хребцях L5 і S1 рівень напружень значно перевищує показники моделі в нормі. Імплантат нової конструкції забезпечує значно нижчий рівень напружень на передній поверхні хребця S1 і навколо фіксуючих гвинтів у ньому. Міжтілова опора приймає на себе основне навантаження, про що свідчить величина напружень у ній, яка втричі перевищує максимальний рівень напружень в імплантаті з матеріалу PEEK. Це дозволяє розвантажити елементи транспедикулярної конструкції, що підтверджується низьким рівнем напружень на всіх фіксуючих гвинтах і по всій довжині опорного стрижня. Висновки. Характер розподілу напружень у блоці хребців L3-S1 не змінився порівняно з моделлю PEEK. У тілах хребців L4 і S1 рівень напруження незначно підвищився порівняно з моделлю PEEK, а в хребці L5 знизився. Використання більш жорсткої міжтілової опори дозволило знизити напружений стан на вході фіксуючих гвинтів до кістки хребця S1. Більш високий рівень напруження в самій міжтіловій опорі порівняно з моделлю PEEK не є критичним щодо міцності для металу.
How to Obtain Valid Generalized Modal Syllogisms from Valid Generalized Syllogisms
Authors: Xu Jing , Zhang Xiaojun
Published: March 2023

Making full use of the truth value definitions of sentences with quantification, possible world semantics and/or fuzzy logic, one can prove the validity of generalized modal syllogisms. This paper shows that the proof of the validity of a generalized modal syllogism can be transformed into that of its corresponding generalized syllogism, and that the generalized syllogism obtained by removing all modalities in any valid generalized modal syllogism is still valid. Therefore, the simplest way to screen out valid generalized modal syllogisms is to add modalities to valid generalized syllogisms, and then to delete all invalid syllogisms by means of the basic rules with which valid generalized modal syllogisms should meet. And then the remainders are valid. This paper illustrates how to obtain 12 valid generalized modal syllogisms by adding necessary modalities and/or possible modalities to any valid generalized syllogism. The two kinds of syllogisms discussed in this paper are composed of sentences with quantification which is the largest number of sentences in natural language. Hence, this innovative research can provide theoretical support for linguistics, logic, artificial intelligence, and among other fields.
Literature Study on comparative Analysis of Long Span PEB Industrial Shed
Authors: K Sharan. , P Prof. Dr. Eswaramoorthi. , P Asst. Prof. Mr. Nandhakumar.
Published: March 2023

Abstract: The concept of Pre-engineered buildings involves steel buildings that are pre-designed and prefabricated. Recent advances in the construction field mainly focus on aesthetic appearance, quality, less time consumption and minimising the cost. Pre- engineered steel buildings are a recent innovation which implements steel structures that ensures economical integrity. This paper elaborates the PEB concepts that help in reducing the cost and time of construction. This technology helps in construction of sustainable structures with an increased durability when compared to standard steel structures which involves more time and cost. Pre-engineered steel buildings are eco-friendly, recyclable and reusable
A Comparative Study on Job Satisfaction between Elementary School Teachers and Elementary Special Education Teachers
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Kim Mi-Kyong , Kim Sung-chul
Published: March 2023

Objectives This study aims to investigate intrinsic and extrinsic job satisfaction in elementary school teachers and elementary special education teachers and compare them in differences in each component. Methods The subjects include 150 elementary special education teachers teaching a special class and 150 elementary school teachers teaching a common class randomly sampled around the Jeonnam Province. A total of 300 questionnaires were distributed to them via a school visit under the permission of the principal and via mail, and 248 returned questionnaires were analyzed. For data treatments, the study conducted a t test to figure out differences in job satisfaction between the two groups of elementary special education teachers and elementary school teachers. Results There were significant differences in overall job satisfaction between the two groups(t=2.02, p=.05). While there were significant differences in intrinsic job satisfaction between elementary special education teachers and elementary school teachers(t=2.03, p=.05), there were no differences in extrinsic job satisfaction between them. Conclusions Elementary special education teachers had higher intrinsic job satisfaction than elementary school teachers with no differences in extrinsic job satisfaction between them. These findings might be used in diverse satisfaction and needs surveys with teachers in schools.
Сарниулагч керр орчин дахь гэрлийн стационар ТМ долгионы амплитуд тусгай функцээр илэрхийлэгдэх тохиол 1
Authors: Г Очирбат , О Нямсүрэн
Published: March 2023

Для зависимости диэлектрической функции от координаты в задаче распространения световых ТМ волн в дефокусирующей керр среде давно получено автором этой статьи формальное интегральное выражение, содержащее четыре параметры, которое до сих пop не удалось выразить через известные функции. В настоящей работе при произвольном фиксированном значении диэлектрической постоянной, в некоторои области значений константа рефракции, в одномерном много-образе значений оставщихся двух параметров интеграл брался в виде линейной комбинации эллиптических интегралов первого и третьего родов.
Мэдээллийн технологийн судалгаа
Authors: О Аварзэд , Л Дорж , Б Нэргүй
Published: March 2023

Монгол улсад физикийн шинжлэх ухааныг хөгжүүлэх үйлсэд ОХУ-ын Дубна хот дахь Цөмийн Шинжилгээний Нэгдсэн Институт(ЦШНИ) доривтой хувь нэмэр оруулсан билээ. Дэлхийд нэртэй энэ байгууллага манай улсын шинжлэх ухаан, боловсролын салбарын хооронд хамтын ажиллагаа тогтоож хөгжүүлэх, нарийн мэргэжлийн боловсон хүчин бэлтгэх, багаж төхөөрөмжөөр хангах үндсэн дээр судалгааны шинэ чиглэл, нэгжийг үүсгэн бэхжүүлэхэд академч Н. Содном агсан ихээхэн буянтай үйлс бүтээсэн.
Газрын татах хүчний орон дахь бөөмийн хөдөлгөөний квантлал
Authors: М Галбадрах , Г Лхагвасүрэн , Х Отгонмөнх , О Лхагва
Published: March 2023

Цөмийн шинжилгээний нэгдсэн институтийн нейтрон физикийн лабораторит хэт хөрсөн нейтрон гаргаж, "саванд" хоргоох арга олсон тухай нилээд дуулиантай хэлэлцэж байсан билээ. Нейтроны хөдөлгөөнийг тасралтгүй сааруулахын хамтаар савын хана руу нэвтрүүлэлгүй буцааж ойлгох аргыг олсон байжээ. Ийнхүү хэт хөрсөн нейтроныг "саванд" хадгалах боломжийг нээсэн юм. Тэр цагаас хэт хөрсөн нейтроныг судалгаанд хэрэглэх арга зүй ихэд нарийсан хөгжжээ.
Гамма цацрагийн үйлчлэлээр Усанболор (SiO2)-т үүсэх парасоронзон дефектийн судлагаа
Authors: Н Төвжаргал , Д Баатархүү , Ж Даваасамбуу , Г Шилагарди
Published: March 2023

Янз бүрийн үнэт болон хагас үнэт чулууны өнгийг өөрчилж хүссэн өнгө хэлбэрт оруулах асуудал үргэлд судлаачид төдийгүй хэрэглэгчидийн сонирхлыг татаж байдаг. Бид энэ ажлаар байгалийн хагас үнэт чулуу болох усанболор (SiO2)-ийн өнгийг гамма цацрагийн үйлчлэлээр өөрчилж, түүнд үүсэх парасоронзон дефекийг ЭПР спектрометрийн аргаар судлав. Судалгааны үр дүнгээс үзэхэд дээжийг гамма цацрагаар шарсны үр дүнд түүнд олон тооны парасоронзон төвүүд үүссэнээс усан болорын зоны бүтцэд өөрчлөлт орж материалын өнгө өөрчлөгдөж байгаагаас гадна дулааны боловсруулалтын горимоос хамааран парасоронзон дефектүүд тодорхой хэмжээгээр эдгэрч байгааг үзүүлэв.
Хөө, Үнсэнд Хийсэн Рентген Дифракцийн Фазын Судалгаа
Authors: Ж Ванчинхүү , Э Баянжаргал , Ж Даваасамбуу
Published: March 2023

Нүүрсний шаталтаас ялгарах хөө, үнсийг инерцийн болон конвекцийн суулт ашиглан цуглуулж гарган авсан дээжүүдэд рентген дифракцийн судалгааны арга ашиглан бүтцийнанализ хийсний дүнд хөө, үнсний доторхи талст болон аморф фазын агуулгыг тогтоов. Хөөнд талст тогтоцтой нүүрстөрөгчийн графит бүтцээс гадна шатаасан нүүрсэнд агуулагдах элементүүд шаталтын явцад бий болсон нэгдэл хэлбэрээр талст бүтэц үүсгэн агуулагдаж байдаг байна.
Микротроны ФНСС дээр резонансны нейтроноор идэвхжүүлж алт тодорхойлоход нейтроны урсгалын зөрөө, сулралыг тооцох
Authors: Д Баатархүү , Н Ганбаатар
Published: March 2023

Резонансны энергитэй нейтроны идэвхжилээр дээж дэх алтны агуулгыг тодорхойлоход шарлагын суваг дахь нейтроны нэгэн төрөл бус урсгалын нөлөө болон дээж дэх нейтроны урсгалын сулралыг тооцож шинжилгээний нарийвчлалыг дээшлүүлж болохыг үзүүлсэн.
Цөмийн өгөгдлийн JENDL-3.3 болон JENDL-4.0 санг ашигласан үр дүнгийн харьцуулалт
Authors: Т Жамъянсүрэн , С Одмаа
Published: March 2023

Судалгааны ажлаар Дорнод аймагт байрлах Улааны полиметаллын ордын цөөн дээжид нейтрон идэвхжлийн болон рентгенфлуоресценцийн шинжилгээгээр үндсэн элементээс гадна ховор шорооны, мөн үнэт металл тодорхойлох зорилго тавин ажиллав. Нейтрон идэвхжлийн шинжилгээний туршилт хэмжилтийг ОХУ-д байрлах ЦШНИ-ийн Цөмийн урвалын лабораторийн электроны хурдасгуур МТ-25 микротрон, гамма спектрометрийн системийг ашиглан хийсэн ба рентенфлуоресценцийн шинжилгээг МУИС-ийн ЦФСТ - ийн рентген спектрометр дээр хийж гүйцэтгэв. Хэмжилтээр полиметаллын хүдрийн дээжид үндсэн элементээс гадна Sc, Y, La, Ce, Eu, Nd зэрэг ховор шорооны элемент, алт 0.05 - 1 ppm, уран 200 - 500 ppm, тори 10 - 90 ppm агуулгатай гарсан нь сонирхол татахуйц үр дүн юм. Судалгааг цааш үргэлжлүүлэн шинжилгээний бусад аргаар элементийн агуулгыг нарийвчлан тогтоох, бүтээгдэхүүний өртгийг нэмэгдүүлэх боломжтой харагдав. Энэхүү судалгааны ажлыг "Цөмийн цацрагийн хэрэглээ" сэдэвт ажлын хүрээнд хийж гүйцэтгэв.
SU(2) ба SU(3) бүлэгт суурилсан латтис гэйж онолуудаас гарах физик үр дүнгүүдийн ялгаа
Authors: Г Энхтуяа , Ч Содбилэг , П Баттогтох
Published: March 2023

Энэ ажлаар бид кварк хоорондын өнгөний харилцан үйлчлэлийг илэрхийлдэг SU(2) ба SU(3) бүлэгт суурилсан онолууд, тэдгээрийн ялгаатай болон адил талуудыг судлав. Мөн эдгээр онолуудаас гарах физик үр дүнгүүдийн ялгааг өмнө нь хийгдсэн ажлуудыг харьцуулах замаар тодорхойллоо. Ингэхдээ урсгалын хоолойн өргөн, таталцлын коэффициент, кварк хоорондын потенциал зэрэг хэмжигдэхүүнүүдийг харьцуулсан. Харьцуулсан бүх хэмжигдэхүүнүүдийн хувьд SU(3) онолоос гарсан үр дүн нь SU(2) онолоос гарсан үр дүнгээс тоон утгаараа их байгааг олж тогтоолоо.
Максвеллийн тэгшитгэлийн, өөрөө цуглуулагч оптик керр орчинд асимптот бөхөх гэрлийн соронзон долгио шийд. Түүний зарим хялбар хэрэглээ.
Authors: Г Очирбат , О Нямсүрэн , Д Улам-Оргих
Published: March 2023

Оптик холбооны багаж бүтээх зорилттой холбогдуулан шугаман биш үе бүхий долгио хөтлөгчөөр гэрлийн долгио тарах асуудлыг судлаачид аль эртнээс сонирхсоор иржээ. Бид харин шугаман биш үе буюу илтсээр гэрлийн соронзон ба цахилгаан долгио тарах бодлого бодоход зориулан нилээд өвөрмөгц арга зүй боловсруулсан билээ
Физик сургалт ба загвар лаборатори, түүний ач холбогдол судалгаа
Authors: П. Энхцэцэг  , О. Лхагва  , Т. Уламбаяр
Published: March 2023

Мэдээлэл харилцааны технологи нь аливаа үзэгдлийг математикт шингээн компьютер загвараар илэрхийлсэнээр физикийн тулгуур хуулийг тооцоот туршилтаар нээх боломж бүрэлдэж байна. Физик дэх мэдээллийн технологийн голсудас нь физикийн 2D, 3D загвар лаборатори бүтээх ажил юм. Дэлхийн өндөр хөгжилтэй орнуудад хичээл сургалтанд загвар лаборатори, тооцоот туршилтыг техникт туршилтын нэгэн адил хэрэглэдэг болсон байна. Математик загварчлал нь байгаль нийгмийн аливаа үзэгдлийг математикаар илэрхийлсэн үзэгдэл хувьсалд түүнийг илэрхийлэх математик тэгшитгэлд оноож болно. Загварчлал гэдэг бол математик, тооцоолох арга, тоон мэдээлэлд шилжүүлэх тооцоо туршилтаар байгаль нийгмийн шинэ зүй тогтол илэрвэл нэн даруй технологийн туршилт хийдэг болжээ. Хэрэгжих арга зүй. Анхан шатны сургалтанд бол эл лабораторийг хөдөлгөөнт үзүүлэн байдлаар ашиглаж болно. Ахлах ангид сурагчид физик үзэгдэл, хуулийг “нээх” зорилго тавьж тооцоо-дүрслэлт туршилт үйлдээд хэмжилтийн дүнг “КАMTASIA” програмаар хөдөлгөөнт мэдээлэлд хувиргана. Дараа нь туршилтын эл ший-зураг баримтыг тойруулан ухааныг уралдуулан ном хаялцах замаар асуудлын шийд рүү хамтаар тэмүүлнэ. Ургуулан сэдэж сэтгэх амин үйлийг өрнүүлэн мэтгэсээр шийдэлд хүрээд сурагчид тулгуур хуулийг өөрснөө “нээгээд”, математик томъёог гаргана. Тооцоо-дүрслэлт туршилтыг үйлдэх, утга тайллыг хийхэд багш эрдмийн удирдагчийн өндөрлөгт байж сурагчдыг “хол” төөрүүлэхгүй чиглүүлэхийг чанд эрхэмлэнэ.
Metal-fullerene on materials for electronics
Authors: M E.M.Shpilevsky , P. Tuvshintur  , S.A.Filatov  , G. Shilagardi  , D.Tumurbaatar
Published: March 2023

The results of studying the physical properties of film materials containing metals and fullerenes are presented. It is shown that the use of these materials in electronics, optoelectronics, biomedicine significantly increases the capabilities of tools and mechanisms.
Графенаар хольцолсон катализатор гарган авах, түүний шинж чанарын судалгаа
Authors: M Б.Бумаа , Э.Уянга  , Г.Сэвжидсүрэн  , П.Алтанцог
Published: March 2023

Энэхүү ажилд катализаторт ашиглах полианилины цахилгаан дамжуулах болон каталитик шинж чанарыг сайжруулах зорилгоор графен нэмж хольцлох туршилтыг явуулж бүтэц, шинж чанарын судалгааг авч үзлээ. Графенаар хольцолсон полианилин нано-файберын хориотой бүсийн өргөн 2.7 эВ, гадаргуун талбай 84 м2/г байв. Түүнчлэн графенаар хольцолсон полианилинд цагаан алт (Pt) суулгаж катализатор бэлтгэв.
Исследование бифуркаций периодических режимов при ламинарно- турбулентном переходе
Authors: M Т.Г. Дармаев
Published: March 2023

В данной работе метод инвариантной конечномерной проекции уравнений Навье-Стокса применяется для исследования плоскопараллельного течении вязкой несжимаемой жидкости над плоской полубесконечной пластиной. При этом,нелинейная начально-краевая задача для периодических возмущений основного течения сводится к конечномерной рекуррентной системе линейных краевых задач для обыкновенных дифференциальных уравнений. Предложенный универсальный алгоритм позволяет численно находить амплитудные поверхности устойчивых инеустойчивых режимов и точки тангенциальных бифуркаций периодических режимов для произвольных частот и чисел Рейнольдса.
Өндөр температурын хийн реакторын голомтын нейтроник анализд “SERPENT”кодыг ашиглах нь
Authors: Т Жамъянсүрэн , С Одмаа , Б Мөнхбат , Н Норов
Published: March 2023

Энэ ажилд Финландын Техникийн Судалгааны төвийн хөгжүүлсэн Монте Карлоаргыг ашиглан нейтроникийн тооцоолол хийдэг SERPENT2.1.30 кодыг ашиглан 20%-ийн баяжуулалттай ураны исэл (UO2) бүхий TRISO түлштэй, 100 МВт-ийн дулааны чадалтай, 927°С температурт ажиллах төвдөө ойлгогчтой, өндөр температурын хийн реакторын голомтын дизайныг хийж, анхан шатны нейтроник тооцооллыг гүйцэтгэв. Энэхүү тооцоололд цөмийн урвалын өгөгдлийн сан ENDF/B-VI.8-ийг ашиглав. Бид өмнө нь ийм голомтын нейтроник тооцооллыг Японы Атомын Энергийн Агентлагийн хөгжүүлсэн Монте Карло аргаар тооцоолдог MVP/GMVP 2.0 комьпютерийн кодыг ашиглан нейтроник тооцооллуудыг гүйцэтгэж, анализ хийсэн. Энэ ажлаар ижил аргаар тооцоолол хийдэг өөр кодууд ашиглан нейтроник тооцооллыг гүйцэтгэн, гарган авсан үр дүнгүүдийн харьцуулан, ялгааг тайлбарлав.
Структура и электрические свойства на переменном токе титанфуллереновых пленок
Authors: Э.М. Шпилевский , С.А Филатов , О.С. Филатова , А.Д Замковец , Г Шилагарди , Д Улам-Оргих , Д Тимур-Батор , С Мунхцецег , Д Эрдэнэбатор , П Тувшинтур
Published: March 2023

Фуллерены благодаря способности структурировать прилегающие к ним молекулы, обеспечивают многообразие возможных конструкций элементов структуры, выступают инструментом формирования новых материалов [1]. Перспективы использования фуллеренсодержащих материалов в микро- и наноэлектронике выдвигают задачи всестороннего исследования свойств сплавов фуллеренов с широко применяемыми материалами. Более двух третей всех химических элементов являются металлами. Согласно [1-3], взаимодействие молекул С60 с атомами металлов приводитк высокой дисперсности структуры, в некоторых случаях к образованию новых фаз. Это сопровождается существенным изменением свойств исходных материалов, в том числе концентрационной зависимости удельного сопротивления. Поскольку многие устройства микроэлектроники работают на переменном токе, то понимание процессов переноса электрического заряда на разных частотах является важным как с теоретической, так и с практической позиций.Целью настоящей работы являлось исследование структуры и полного электрического сопротивления пленок титан-фуллерен, содержащих разное соотношение компонентов пленок титан-фуллерен.
The Current State and Future of Plasma Cell-Free DNA Analysis in Urologic Malignancies
Authors: Akamatsu Shusuke , Mizuno Kei , Sumiyoshi Takayuki , Goto Takayuki , Kobayashi Takashi
Published: March 2023

Genomic medicine based on comprehensive genomic profiling (CGP) has revolutionized cancer treatment. However, there are certain limitations to CGP based on tissue analysis. Liquid biopsy, particularly plasma cell-free DNA (cfDNA), has emerged as a less invasive source of information to complement tissue-based analysis. To use cfDNA analysis effectively in the clinical setting, it is important to know the characteristics and specific limitations of cfDNA analysis. Moreover, the utility of cfDNA testing differs between cancer types, which is not widely recognized. Furthermore, in addition to its use in CGP, there are broader applications for cfDNA testing, including its use in detecting minimal residual disease or even epigenomic profiling. In this review, we first describe the detailed characteristics of cfDNA and the limitations of cfDNA analysis, and then focus on the utility of cfDNA analysis in urologic malignancies.
Epidemiology of Urologic Cancer in Korea: Nationwide Trends in the Last 2 Decades
Authors: Han Sang Heon , Yuk Hyeong Dong
Published: March 2023

Purpose: This study assessed recent trends in the incidence of urologic cancer and patient survival in Korea.Materials and Methods: The incidence of urologic cancer in Korea was calculated based on the Korea National Cancer Incidence Database and the South Korean Statistical Information Service Database. Data from 2000 to 2020 were used to determine the incidence, death, prevalence, and survival rates of urologic cancer.Results: Urologic cancer was diagnosed in 27,514 cases, accounting for 11.1% of the total cancer incidence. In 2020, there were 16,815 prostate cancer cases, 5,946 kidney cancer cases, and 4,753 bladder cancer cases. The age-standardized rate (ASR) for the incidence of prostate, kidney, and bladder cancer increased from 2000 to 2020. The overall ASR was 56 per 100,000 in 2020. In 2000, the ASRs for prostate, kidney, and bladder cancer were 2.9, 3.1, and 4.8 per 100,000, respectively, whereas they were 32.7, 11.6, and 9.3 per 100,000, respectively, in 2020. Urologic cancer has also seen a steady increase in the death rate, prevalence rate, and relative survival rate over the past 20 years. The 5-year relative survival rates for patients diagnosed with prostate cancer, kidney cancer, and bladder cancer during the 5-year period from 2015 to 2019 were 94.4%, 84.7%, and 76.5%, respectively. Among urologic cancers, prostate cancer had the highest survival rate, and bladder cancer had the lowest.Conclusions: The survival rate for urologic cancer is increasing; however, the incidence and prevalence rates continue to rise.
A Comparative Study on Leisure Constraints between the Seniors and Preschoolers
Authors:   The Convergence Tourism Contents Society, Song Hwasung , Lee Yoon Jung
Published: March 2023

Purpose: The purpose of this study was to compare and analyze the leisure constraints of seniors and preschoolers as vulnerable tourism groups. Numerous studies have been conducted on the vulnerable groups of the disabled and seniors, but there have been insufficient studies on the preschool age group. With the end of the COVID-19 pandemic, leisure conditions are returning to pre-pandemic levels, necessitating research on tourism constraints for tourism-vulnerable groups.
Methods: To determine the specific leisure constraints of senior citizens and preschoolers, in-depth interviews with 4 senior citizens and 4 preschoolers' caregivers were conducted and analyzed according to Crawford & Godbey's categories of leisure constraints(1987).
Results: As a result of analyzing the seniors' and preschoolers' tourism constraints, unlike previous studies, there were no clear intrapersonal constraints in both groups, and both groups had a “negative perception of others” in terms of interpersonal constraints. Lack of customized leisure programs and lack of barrier-free facilities were cited as structural constraints for both seniors and preschoolers. Particularly, specific and detailed facility requirements were confirmed for the preschoolers compared to the seniors.
Conclusion: This study was able to confirm the similarities and differences between the two groups by identifying the understudied tourism constraints of preschoolers and comparing them to those of seniors. Through this, it will serve as a foundation for providing a system that can be complemented in common by the two groups, as well as providing tourism constraints that can be tailored to each group.
The Effect of SNS Marketing Communication of Local Governments on the Image, Trust, and Behavioral Intention of Tourist Destinations
Authors:   The Convergence Tourism Contents Society, Lee Eun Min
Published: March 2023

Purpose: In the tourism industry, research is being conducted on SNS marketing communication, tourist destination image, trust, and behavioral intention, but research on SNS marketing communication by local governments is insufficient. Based on this research background, the impact of local governments' SNS marketing communication on tourist attraction image, trust, and behavioral intention is empirically verified to derive implications.
Methods: A total of 350 copies of the questionnaire were distributed, and a total of 339 copies were used for the final statistical analysis, excluding 11 people due to insincere or inaccurate responses. As an analysis method of the study, simple and multiple regression analysis was performed using SPSS 24.0 to verify the reliability, validity, and hypothesis of variables.
Results: It was confirmed that SNS word of mouth and SNS publicity are important factors in SNS marketing communication of local governments. In addition, it was found that the image of a tourist destination had a significant effect on the behavioral intention if the image of a tourist destination and the trust were high.
Conclusion: SNS managers of local governments should be aware of the importance of SNS word of mouth and SNS publicity, and it may be important to upload detailed tourism information on SNS posted by local governments so that tourists can provide good local information when uploading tourism information on SNS.
Test-Retest and Inter-Rater Reliability of the 20-Meter Ambulation Test in Patients with Parkinson's Disease
Authors: Hutin Emilie , Ghédira Mouna , Mardale Valentina , Boutou Mina , Santiago Tharaga , Joudoux Sandrine , Gault-Colas Caroline , Gracies Jean-Michel , Bayle Nicolas
Published: March 2023

Objective: In patients with Parkinson’s disease, limited sit-to-stand, walk and turn contribute to decreased independence and quality of life. The 20-meter Ambulation Test (AT20) evaluates walking a total of 20 m, over a 10-m distance, back and forth between 2 chairs, starting and ending in a seated position. The aim of this study was to evaluate test-retest and inter-rater reliability of the AT20 in patients with Parkinson’s disease.Methods: Patients with idiopathic Parkinson’s disease performed the AT20 in 3 conditions: free speed, fast speed, and with large steps, twice 1 week apart. The total number of steps and the time to complete the task were recorded manually by 4 independent raters. The main outcome criteria were the test-retest and inter-rater intraclass correlation coefficients and coefficients of variation for speed, step length and cadence in the 3 conditions.Results: Twenty participants completed the 2 visits. Across all conditions, test-retest and inter-rater intraclass correlation coefficients for step length and speed were > 95%. Test-retest and inter-rater coefficients of variation were < 0.08.Conclusion: The AT20 is a reliable ambulation test in Parkinson’s disease, with excellent test-retest and inter-rater reliability for step length and speed in all 3 conditions: at free speed, fast speed, and with large steps. The AT20 might be useful to assess ambulation in parkinsonism in clinical practice.
LAY ABSTRACTIn patients with Parkinson’s disease, limited sit-tostand, walk and turn contribute to decreased autonomy and quality of life. The 20-meter Ambulation Test (AT20) evaluates walking for a total of 20 m, over a 10 m distance, back and forth between 2 chairs, starting and ending in a seated position. The aim of the current study was to evaluate test-retest and inter-rater reliability for speed, step length and cadence measurement using the AT20 in subjects with Parkinson’s disease. Twenty patients with idiopathic Parkinson’s disease performed the AT20 in 3 conditions: free speed, fast speed, and with large steps, twice 1 week apart. The total number of steps and the time to complete the task were recorded manually by 4 independent raters. The AT20 is a reliable ambulation test in Parkinson’s disease, with excellent reliability between tests and between raters in all 3 conditions: free speed, fast speed, and with large steps. The AT20 might be useful in clinical practice to assess ambulation disorders in patients with parkinsonism.
Steering-by-leaning: Feasibility of Utilising Dynamic Backrests to Control Steering in Manual Wheelchairs
Authors: Togni Reto , Disch Karin , Plüss Michael , Lerch Irina , Zemp Roland , Taylor William R.
Published: March 2023

Objective: Steering-by-leaning is a promising innovation for manual wheelchairs. It may enable improved energy efficiency, one-handed manoeuvrability, and increased trunk activity during wheelchair use in daily life. To explore the feasibility of this concept, the lateral trunk function of active wheelchair users was assessed before comparing 3 preliminary dynamic backrest designs in a virtual steering exercise.Design: Repeated measures, cross-over study.Subjects: A convenience sample of 15 individuals who had been full-time users of manual wheelchair for at least 1 year.Methods: Active core strength and lateral leaning range of motion were captured while sitting freely. Participants subsequently tested 3 dynamic wheelchair backrest designs on an individually adjusted laboratory wheelchair prototype by performing a virtual steering exercise. Deviations from a target movement path were analysed using repeated measures analysis of variance and Pearson correlation coefficients.Results: Functional leaning range of motion ranged from below 10° to almost 70°, but increased significantly with use of the simplest backrest design based on a 2-dimensional hinge joint. No correlation was found between functional levels and performance parameters in the virtual steering exercise.Conclusion: Using an individually fitted and calibrated design, upper body-actuated wheelchair steering using a laterally tilting backrest is accessible to wheelchair users across a wide spectrum of physical abilities.
LAY ABSTRACTManual wheelchairs not only enable mobility, but also provide postural support to users through passive seating elements. The consequences of static sitting, however, include pain, deformities, and pressure injuries. The concept of backrest steering in manual wheelchairs may improve overall energy efficiency while promoting active trunk movement, but its applicability is questionable given the varying levels of trunk control among users. In this study, active trunk function of 15 full-time users of manual wheelchairs was measured prior to testing 3 prototype dynamic backrest designs in a virtual steering exercise. The results highlight the broad spectrum of abilities in this population, but suggest that active movement can be supported by simple mechanisms. No meaningful relationship was found between trunk abilities and performance in the virtual steering exercise, indicating that upper body-actuated steering of manual wheelchairs is accessible to users across a wide spectrum of physical abilities.
PHENOMENON OF DEMIKHOV. Achievements and prospects of heart transplantation in the USSR in the early 1970s
Authors: Glyantsev S. P.
Published: March 2023

The paper presents the analysis of two publications written by two pioneers of heart transplantation in the USSR, A.A. Vishnevsky with co-authors and G.M. Solovyov, which covered the state of the organ transplantation issue in 1971–1973 and gave predictions for its future development. It is shown that the authors of those publications saw and formulated the main trends in the development of the problem in one and the same way. Meanwhile, G.M. Solovyov, being the Director of the specialized Institute of Organ and Tissue Transplantation of the USSR Academy of Medical Sciences saw the issues of organ transplantation more in depth than A.A. Vishnevsky who headed the A.V. Vishnevsky Institute of Surgery of the USSR Academy of Medical Sciences. In particular, this concerned immunological studies. Shortly after its establishment in 1969, the Institute of Organ and Tissue Transplantation arranged a powerful laboratory of immunogenetics on its base. The staff of that laboratory (L.V. Smirnova, Yu.M. Zaretskaya, L.P. Alekseev, V.I. Shkurko, A.M. Sochneva, I.V. Petrova, etc.) conducted world-class immunological studies, which results inspired certain optimism among surgeons. A more complicated situation was with the clinical issues of organ transplantation, with the solution of organizational, moral and ethical issues, where, in addition to doctors, the active participation of legislators, economists, and healthcare organizers was required. This paper presents comparative data on the state of political, economic, and organizational issues of organ transplantation in the Russian Federation between the 2010s and early 2020s. It is shown that the planned in the 2020s tendency of their positive solution and further development inspires certain optimism.