bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improving a model of the hybrid photovoltaic system with a storage battery for local object’s self-consumption involving the setting of power consumed from the grid
Authors: Shavolkin Olexander , Shvedchykova Iryna , Lishchuk Victoria , Stanovskyi Yevhen 
Published: July 2023

The object of research is energy processes in a hybrid photovoltaic system with a storage battery for the needs of a local object involving the setting of power consumed from the network. The task addressed was to build a mathematical model of energy processes with the function of determining control parameters providing for the possibility of changing control scenarios. The mathematical model of the storage battery has been improved, taking into account the charge modes and discharge currents in terms of accuracy of reproduction of the manufacturer’s specification not worse than 3 %. A structure of the model was proposed with separation of module, which defines control parameters, as well as the schedule of power setting for selected scenarios. A variable is introduced into the model description, which determines the specified power value and ensures the construction of SoС(t) schedule. An additional mode to increase the energy use of the photovoltaic battery and restrictions on the measured value of load power were taken into account. Modeling with a change in time scale was proposed: first, control parameters are determined, followed by modeling in the daily cycle. This eliminates the need for preliminary calculations before modeling and provides the ability to verify the determination of system parameters with subsequent adjustment. A procedure for determining control parameters with power setting and adjusting the model under different control scenarios has been devised. When using archival generation data for the location of the facility, this makes it possible at the design stage to choose an option for implementing the power supply system with the desired indicators. For specific uses, it has been shown that underestimating the power of a photovoltaic battery by only 9 % increases energy costs by 1.72–1.39 times. Overstating power by 16.7 % impairs usage by 13.7 % while reducing costs by 1.4 % to 2.5 %
Identifying patterns of aerosols formation during contact butt fusion welding
Authors: Levchenko Oleg , Demetska Oleksandra , Polukarov Yury , Goncharova Olga , Bezushko Olga , Prakhovnik Nataliia , Andrusyshyna Iryna 
Published: July 2023

The object of research is the hygienic characteristics of harmful substances that pollute the air during contact butt welding with continuous and pulsating melting. The task to be solved is the lack of such information for devising appropriate measures to protect operators of contact welding of railroad rails. A description of the methods of researching the chemical composition of welding aerosols and gases, the dispersed composition of nano-sized fractions of aerosols and assessing their impact on the body of welders is given. It was established that contact butt welding by melting P65 rails is accompanied by the release of harmful substances into the air of the working zone in the form of aerosols at the nano range level, which are characterized by high biological activity. The research results showed that during continuous melting, the intensity of welding aerosol release is lower than during pulsating melting. It is shown that the toxicity of the aerosol during contact welding belongs to the moderately dangerous class. It was established that during contact butt welding by melting, an aerosol is formed, the composition of which contains nano-sized components of manganese and iron in concentrations that exceed the calculated approximately safe levels of human exposure. In the aerosol sample, particles ranging in size from 70.8 to 1071.8 nm were detected, and the average aerodynamic diameter of the aerosol particles was 295.2 nm. The studies have shown that melting butt welding is accompanied by the formation of such toxic gases as nitrogen dioxide and carbon monoxide in concentrations that exceed the maximum permissible. The results of a comprehensive hygienic assessment of aerosols during contact butt fusion welding provided comprehensive information about the level of harmful effects of these aerosols on the body of welders
Determination of the number of clusters on images from space optic-electronic observation systems using the k-means algorithm
Authors: Khudov Hennadii , Makoveichuk Oleksandr , Komarov Volodymyr , Khudov Vladyslav , Khizhnyak Irina , Bashynskyi Volodymyr , Stetsiv Stanislav , Dudar Yevhen , Rudiy Andrii , Buhera Mykhailo 
Published: July 2023

The object of research is the process of clustering images from space optical-electronic surveillance systems. The main hypothesis of the study assumed that experimental studies would make it possible to determine the number of clusters on images from space optical-electronic surveillance systems when using the k-means algorithm.
The method of clustering images from space optical-electronic surveillance systems using the k-means algorithm, unlike the known ones, implies:
– splitting the source image into Red-Green-Blue brightness channels;
– determination of the Euclidean distance between pixels;
– distribution of the entire set of image pixels into clusters;
– recalculation of "centers" of each subset;
– reassignment of new "centers" of each cluster;
– minimization of the total intracluster variance.
Experimental studies were conducted on the clustering of the original image using the k-means method at different values of k. It was established that with an increase in the value of k, the visual quality of clustering improves, and it is possible to visually determine a larger number of clusters in the images.
To determine the number of clusters, the sum of clustering errors of type 1 and 2 at different values of k was evaluated. It was established that when the value of k increases, the sum of errors of the 1st and 2nd kind initially decreases exponentially. A further increase in the value of k does not lead to a significant decrease in errors of the 1st and 2nd kind. It was established that for a typical image from the space optical-electronic observation system, the value of k in the clustering method based on the k-means algorithm should be equal to 4. At the same time, the sum of errors of the 1st and 2nd kind is 31.3 %.
Further research is directed to the development of clustering methods that reduce the sum of errors of the 1st and 2nd kind
The Mindful Helping and Self-Care Model: Mindful Self-Care and Quality of Life Among a Racially Balanced Sample of Helping Professionals
Authors: Hotchkiss Jason T. , Cook-Cottone Catherine 
Published: July 2023

Abstract
This study explored the Mindful Helping and Self-Care model and validated the Mindful Self-Care Scale (MSCS) among three racially balanced samples of helping professionals (n = 1,534). The study employed a cross-sectional, self-report design. The racial representation of participants was American Indian (n = 68), Asian (n = 351), African American (n = 384), Latino (n = 325), White (n = 301), and other (n = 114). The MSCS (33 items) showed good internal structure and measurement invariance to support generalizability across the three groups studied. With parsimony for application development, the Brief-MSCS (24 items) had a stronger internal structure across the three groups. Mindful self-care and secondary traumatic stress mediated the relationship between burnout and compassion satisfaction, as the total effects were greater than the direct effects. Mindful self-care practices were associated with reduced burnout risk. Mediation analysis results supported the Mindful Helping and Self-Care model. The empirical foundation for the 33-item MSCS and 24-item Brief-MSCS is further supported in this study. Both are excellent instruments for measuring mindful self-care factors in helping professionals using a behavioral frequency approach in a weekly time context. The Brief-MSCS is a more concise measure, making it particularly useful for application development. The reliability, construct, and concurrent validity of the MSCS and Brief-MSCS were confirmed. Mind-body practice is self-care; expressions vary by racial group and are associated with overall wellness. Future research should focus on professionals and cultures outside North America.
Method of Extended Primary Microsurgical Treatment of Extensive Penetrating Scleral Wounds
Authors: Shamkin S. S. , Subbotina S. N. , Stepanyants A. B. 
Published: July 2023

Purpose: to expand and modernize the technology of primary microsurgical treatment of extensive scleral wounds due to simultaneous subtotal vitrectomy, primary treatment of retinal and choroid wounds, filling of tissue defects with autologous conditioned plasma (ACP), tamponade with silicone oil or C3F8 gas.Methods. 15 patients (15 eyes) with extensive penetrating scleral and corneoscleral wounds ranging from 8 to 15 mm in length, with concomitant complex injuries of various structures of the eye: traumatic cataract, wound of the ciliary body, injury or loss of the iris, subtotal/total hemophthalmos, retinal detachment were monitored. All patients underwent primary surgery according to the original extended technique.Results. The functional results of surgical treatment in patients, taking into account the severity of the injury, were high: in the early postoperative period, 1 month after primary surgery, visual acuity with correction ranged from 0.02 to 0.5. Signs of proliferative vitreoretinopathy were not observed in any case.Conclusion. The proposed method of extended primary microsurgical treatment for extensive penetrating scleral and corneoscleral wounds with severe concomitant damage to intraocular structures is effective and has a number of advantages: early prevention of severe complications in the form of proliferative vitreoretinopathy, shortening the rehabilitation period. The method allows to achieve high functional results in the most severe cases of penetrating eye injury.
Features of Damage to the Organ of Vision in Coronavirus Infection
Authors: Razumovsky M. I. , Razumovskaya A. M. , Korovyansky Yu. A. 
Published: July 2023

Introduction. Recently, there have been a number of reports of damage to the posterior segment of the eyeball (retina and vascular tract) as a complication of coronavirus infection. Moreover, such lesions occur in the long term (after a few weeks or more). We also observed similar changes, sometimes with the development of a second wave of the disease. At the same time, early diagnosis of damage to the microcirculatory bed and phenomena — precursors of thrombosis (blood clotting disorders) is very important.The aim of the study was to determine the types of complications of coronovirus infection on the part of the organ of vision and their clinical form. Creation of methods for early diagnosis of the progression of possible thrombogenic processes in the anterior and posterior segments of the eyeball.Methods. The object of the study were patients with various types of complications due to coronavirus infection. The state of the bulbar microcirculation and the diagnosis of thrombotic symptoms caused by complications of coronavirus infection (COVID-19) were studied.Results. The types of complications of coronovirus infection on the part of the organ of vision and their clinical forms were determined. Methods for early diagnosis of the progression of possible thrombogenic processes in the anterior and posterior segments of the eyeball have been developed.Conclusion. As a result of a survey of 75 patients who had a coronavirus infection, it was revealed that the most common eye complications are anterior and posterior blepharitis, in addition, in some cases, damage to the microcirculatory bed of the bulbar conjunctiva was found in the form of arteriolar and venular angiitis and damage to the vessels of the posterior segment of the eyeball.
Out-of-Pocket Expenditures of Myocardial Infarction Patients in Pondicherry, South India
Authors: Sahanaa Chandar , Purty Anil Jacob , Prabakaran Stalin , Arokiaraj Mark Christopher , C H Manjunatha 
Published: July 2023

Background: Myocardial infarction (MI) is a leading cause of morbidity and mortality worldwide. In India, incidence of MI is rapidly increasing due to lifestyle changes, ageing and rising healthcare costs. The out-of-pocket expenditure (OOPE) for MI care in India can be substantial, as majority of healthcare costs are paid by patients or their families. However, little is known about the actual OOPE incurred by MI patients in tertiary care centres in Pondicherry, South India. This study aims at estimating the OPPE by MI patients attending the tertiary care centre in Pondicherry. The findings can inform policymakers and healthcare providers in developing interventions to reduce the financial burden of MI care in patients and their families.
Methods: This was a hospital-based, cross–sectional study conducted on patients attending Cardiology's outpatient department OPD, who had myocardial infarction in the past for about 3 months to 3 years at the time of enrolment in the study. A pre-designed and validated questionnaire was used to collect information regarding socio-demographic details and cost of health expenditures (direct medical and non-medical costs and indirect cost for both the participants and caregivers). Data analysis was done using SPSS24 Software. The median and inter-quartile range was used for assessing the cost of health expenditures.
Results: Study participants underwent invasive and non-invasive procedure as part of their management. More than 93% underwent invasive, and the cost ranges from 1,694.03 USD to 2470.00 USD (1,20,000 INR to 1,75,000 INR). They spent 10.58 USD to 21.17 USD (750 INR to 1,500 INR) for their monthly medication. The travel expenses for each follow-up visit were between 5.64 USD to 70.57 USD (400 INR and 5000 INR). The majority of participants received health insurance or reimbursement of 1834 USD (1,30,000 INR) from their firm, 12.7% of the participants lost a payment of 162 USD to 776.28 USD (11,500 INR – 55,000 INR).
Conclusion: The cost of the invasive procedure for myocardial infarction patients was 1694.03 USD to 2470.00 USD, which was the major share from the out-of-pocket expenditure compared with the other direct and indirect costs.
Evaluasi Kurikulum Pembelajaran Bahasa Arab di SMA Islam Al Azhar 24 Boarding School
Authors: Rahmanudin Ii , Anwar M. Syahrul , Ahmad Bakri Mohammad Bkhet , Qomari Nur 
Published: July 2023

Abstrak
Seiring berjalannya waktu, kurikulum di Indonesia terus berubah-ubah, khususnya kurikulum ranah Kemendikbud. Hal ini berpengaruh terhadap kebijakan sekolah dalam penerapan proses pembelajaran. Seperti halnya kurikulum pembelajaran bahasa Arab yang diterapkan di SMA Islam Al Azhar 24 Baording School yang masih menerapkan kurikulum 2019 sebagai acuannya khususnya dalam pelajaran Bahasa Arab. Namun berbanding terbalik dengan pelaksanaannya dilapangan. Setiap sekolah tentunya mempunyai evaluasi yang berbeda serta menarik untuk dibahas. Oleh karena itu peneliti mencoba membahas bagaimana pengimplementasian kurikulum 2019 dalam pembelajaran bahasa Arab di SMA Islam Al Azhar 24 Baording, serta mengetahui evaluasi dalam pengimplementasian tersebut. Penelitian ini menggunakan metode kualitatif deskriftif dengan pendekatan studi kasus. Hasil penelitian ini menyatakan bahwa antara evaluasi pemahaman guru terhadap implemnetasi kurikulum 2019 masih sangatlah kurang, sehingga pengaruhnya terhadap proses pembelajaran dan hasil penilaian yang mengalami kesenjangan. Oleh karena itu dengan sekolah berbasis boarding atau berasrama kiranya perlu pengembangan kurikulum pembelajaran bahasa Arab di SMA Islam Al Azhar sehingga keempat kompetensi berbahasa dapat tercapai.
Kata Kunci: Evaluasi Kurikulum, Pembelajaran Bahasa Arab
Faktor yang Mempengaruhi Tingkat Fertilitas di Indonesia: Review Literatur
Authors: Darki Ni Wayan Yustika Agustin , Wibowo Arief 
Published: July 2023

Latar Belakang: Total Fertility Rate Indonesia tahun 2017 yaitu sebesar 2,4 yang artinya seorang wanita selama masa usia suburnya melahirkan adalah 2 sampai 3 anak. Namun angka tersebut belum memenuhi target RPJMN pada tahun 2015 yaitu 2,1. Tingginya tingkat fertilitas di suatu wilayah memiliki dampak negatif seperti terjadinya ledakan penduduk, lahan yang semakin berkurang, bahkan menyebabkan kekurangan bahan makanan, meningkatnya angka kriminalitas.
Tujuan: Untuk mengidentifikasi faktor yang mempengaruhi ffertilitas di Indonesia.
Metode: Penelitian ini menggunakan metode literature review dengan menelaah 11artikel yang sesuai dengan topik dan tema yang telah ditentukan. Adapun database yang digunakan yaitu Google Scholar, ScienceDirect, Pubmed, dan DOAJ.
Ulasan: Dari keseluruhan didapatkan bahwa faktor yang mempengaruhi fertilitas adalah umur, tingkat pendidikan, umur kawin pertama (UKP), pendapatan, alat kontrasepsi yang digunakan, status bekerja ibu, dll. Jumlah anak yan dilahirkan semakin besar seiring dengan peningkatan umur ibu. Namun berbanding terbalik dengan umur, semakin muda usia kawin pertama maka akan meningkatkan jumlah anak yang dilahirkan. Sedangkan pendidikan yang tinggi akan menurunkan jumlah anak yang dilahirkan.
Kesimpulan: faktor yang berpengaruh pada tingkat fertilitas yaitu umur, tingkat pendidikan, umur kawin pertama, pendapatan, jumlah anggota keluarga, dan penggunaan alat kontrasepsi. Hal ini berkaitan dengan faktor lainnya seperti norma dan kepercayaan, sosial ekonomi, lingkungan, dan juga faktor demografi.
Pelaksanaan Asuhan Gizi Terstandar melalui Pemberian Diet Tinggi Kalori Tinggi Protein pada Pasien dengan Kejadian Dengue Fever (DF): Laporan Magang Kasus Dietetik Demam Berdarah (Studi di RS X Kota Sidoarjo)
Authors: Sabrina Hasna Nur , Rachmah Qonita , Adila Yulia 
Published: July 2023

Latar Belakang: Pasien DF memerlukan asuhan gizi khusus untuk percepatan pemulihan dan mencukupkan asupan gizi. DF merupakan kondisi infeks akibat virus dengue disertai gejala prodromal nyeri kepala, nyeri berbagai bagian tubuh, anoreksia, menggigil dan malaise. Asuhan gizi terstandar dilakukan dengan pemberian diet tinggi kalori dan tinggi protein untuk memenuhi kebutuhan gizi pasien, menecgah kerusakan jaringan tubuh, menormalkan kadar sel darah putih akibat infeksi serta mengontrol berat badan.
Tujuan: Mengetahui implementasi proses asugan gizi terstandar dan pemberian diet tinggi kalori tinggi protein pada pasien DF.
Metode: Studi kasus dilakukan bulan November 2021 pada pasien rawat inap RS X di Sidoarjo. Pengambilan sampel penelitian dilakukan dengan memilih pasien sesuai kriteria kasus besar yang sudah ditentukan sebelumnya oleh ahli gizi rumah sakit dan pembimbing magang. Pengambilan sampel penelitian dengan melihat rekam medis pasien atas persetujuan perawat jaga dan didampingi oleh ahli gizi rumah sakit. Metode yang dilakukan adalah observasi selama 3 hari pada aspek asupan yang dilihat dari 8 kali makan food recall 24H dan visual comstock, aspek fisik dengan wawancara, dan aspek biokimia dilihat dari rekam medis pasien. Peneliti juga melakukan studi literature untuk melengkapi data yang dibutuhkan.
Hasil: Setelah dilakukan intervensi gizi, kondisi fisik pasien mulai membaik ditandai dengan nafsu makan yang sudah mulai normal dan keluhan mual muntah yang sudah tidak ada. Asupan makan pasien yang sudah mulai membaik dari hari ke hari ditandai dengan sudah mencapai target (>70%). Namun pada hari terakhir intervensi asupan tidak mencapai target (<70%) dikarenakan pasien sudah diijinkan pulang oleh dokter yang bertanggung jawab.
Kesimpulan: Pada kasus ini pemulihan kondisi pasien berjalan cukup cepat. Sistem pencernaan pasien mulai membaik ditandai dengan hilangnya keluhan mual muntah sehingga asupan pasien juga ikut membaik.
Determination of Concentration-Dependent Effective Diffusivity of Each Gas Component of a Binary Mixture in Porous Media Saturated with Heavy Oil under Reservoir Conditions
Authors: Zhao Wenyu , Jang Hyun Woong , Yang Daoyong 
Published: July 2023

Summary
One frequently used enhanced heavy oil recovery technique is gas injection, during which heavy oil viscosity is reduced due to diffusion of gaseous components and heavy oil swelling in porous media. Effective diffusivities of gas components are generally assumed to be constants, while no attempts have been made to determine both the concentration-dependent effective diffusivity in porous media saturated with heavy oil and the preferential contribution of each component in a binary/ternary gas mixture. In this study, a pragmatic and robust technique has been proposed to determine the concentration-dependent effective diffusivity of each gas component by reproducing the experimental measurements during pressure decay tests for CO2-C3H8-heavy oil systems in porous media. Experimentally, CO2 and C3H8 are utilized to diffuse into sandpacks fully saturated with heavy oil. Under a constant temperature within a thermostatic chamber, the pressures of the aforementioned gas(es)-heavy oil systems are consistently tracked and saved while gas samples are taken at the start and end of the diffusion tests for gas chromatography analyses. Theoretically, a mass transfer model is formulated to determine effective gas diffusivity in heavy oil as a concentration-dependent function by incorporating Fick’s second law and the modified Peng-Robinson equation of state (PR EOS). The concentration-dependent effective diffusivity for each gas component is ascertained when the measured pressure profiles and gas compositions are matched well to their correspondingly calculated values with minimum deviations. Compared to either a constant assumption or a linear concentration-dependent relation with respect to diffusivity, an exponential concentration-dependent relation leads to more accurately reproducing the measured pressure profiles. Compared with pure CO2, its effective diffusivity in a binary (i.e., CO2 and C3H8) gas system is found to be larger, indicating that C3H8 accelerates the CO2 mass transfer into heavy oil under the same circumstances. Furthermore, this study confirms that a larger tortuosity of a porous medium leads to a longer diffusion path with less contact between gas and liquid phases and that a lower concentration of a gaseous component yields a lower effective diffusivity.
Smallest Self-cleaving Ribozyme class revealed by deep mutational scanning
Authors: Zhou Yaoqi , Zhang Zhe , Hong Xu , Xiong Peng , Wang Junfeng , Zhan Jian 
Published: July 2023

Abstract

Despite their importance in a wide range of living organisms, self-cleaving ribozymes in human genome are few and poorly studied. Here, we performed deep mutational scanning and covariance analysis of two previously proposed self-cleaving ribozymes (LINE-1 and OR4K15). We found that the functional regions for both ribozymes are made of two short segments, connected by a non-functional loop with a total of 46 and 47 contiguous nucleotides only. The discovery makes them the shortest known self-cleaving ribozymes. Moreover, the above functional regions are circular permutated with two nearly identical catalytic internal loops, supported by two stems of different lengths. This new self-cleaving ribozyme class, named as lantern ribozyme for their shape, is similar to the catalytic region of the twister sister ribozymes in term of sequence and secondary structure. However, the nucleotides at the cleavage sites have shown that mutational effects on lantern ribozymes are different from twister sister ribozymes. The discovery of lantern ribozymes reveals a new ribozyme class with the simplest and, perhaps, the most primitive structure needed for self-cleavage.