bluuebunny/crossref_metadata_2025 huggingface dataset:
PERLUNYA PENINGKATAN KINERJA PELAYANAN ANGKUTAN KOTA DIKABUPATEN SERANG ( Studi Kasus: Trayek Cilegon-Bojonegara)
Authors: Rosdiyani Telly , Abadi Ma'ulfi Kharis , Purwasih Devi
Published: February 2022

Pertumbuhan penduduk di kota Cilegon setiap tahunnya meningkat, tentunya menuntut kebutuhan moda untuk dapat melayani transportasi di wilayah tersebut, Dengan demikian kinerja pelayanan angkutan sangatlah berperan penting. Kinerja pelayanan dimaksudkan prilaku yang nyata yang ditampilkan sebagai hasil kerjanya. Kondisi angkutan kota dikabupaten Serang pada trayek Cilegon-Bojonegara secara visual angkutan kendaraan yang sudah tua, waktu tunggu yang lama, serta pengalaman driver yang minim dalam berkendara. Sehingga faktor-faktor tersebut mengakibatkan kurang nyaman bagi pengguna angkutan dengan demikian bertujuan dapat  menganalisa kinerja angkutan kota dikabupaten Serang pada trayek Cilegon-Bojonegara. Metode penelitian menggunakan metode kualitatif  deskripsi dengan pengambilan data primer dan skunder untuk mengetahui berupa waktu antara (headway), faktor muat (load factor), jumlah angkutan kota yang beroprasi, serta data responden. Dari hasil penelitian ini angkutan kota dikabupaten Serang memiliki waktu antara (headway) nilai rata-rata tertinggi sebesar 26,1 menit dan rata-rata terendah sebesar 14,9 menit. Faktor muat (load factor) nilai rata-rata maksimum sebesar 15 % dan rata-rata minimum sebesar 4 % sehingga jumlah angkutan kota dikabupaten Serang pada trayek Cilegon-Bojonegara kekurangan angkutan sebesar 2 unit artinya waktu antara (headway) belum memenuhi standar kinerja angkutan kota/umum dapat dilihat dari waktu puncak diperoleh sebesar 21 menit yang dibandingkan yaitu 15 menit. Faktor muat (load factor) masih kurang dari standar kinerja angkutan umum/kota dapat dilihat dari rata-rata yang didapat sebesar 10% yang dibandingkan dengan standarnya yaitu sebesar 70%. Jumlah angkutan yang beroperasi masih kekurangan 2 unit, karena faktor muat penumpang masih kurang sehingga tidak banyak angkutan kota yang dibutuhkan untuk memenuhi penumpang trayek Cilegon-Bojonegara dan upaya dalam peningkatan angkutan menurut hasil survai responden  sebesar 44,7 % berpendapat perlunya oprasional angkutan diperbaiki dengan sarana angkutan diremajakan.
ANALISA PERBANDINGAN WAKTU DAN BIAYA PADA KONTRUKSI FULL PRECAST DAN KONTRUKSI KONVENSIONAL ( STUDI KASUS : RUMAH TINGGAL DUA LANTAI JAKARTA TIMUR )
Authors: Euis Amilia Euis Amilia , Fahmi Muhamad , Hariyanto Bambang
Published: February 2022

Proyek Kontruksi adalah suatu usaha yang bertujuan mendirikan bangunan dalam waktu tertentu dengan sumber daya proyek yang terbatas untuk mencapai hasil yang diharapkan,waktu pengerjaan serta biaya yang dikeluarkan menjadi hal utama yang di perhatikan oleh setiap Develover atau Owner Seiring dengan perkembangan zaman dan teknologi, pekerjaan konstruksi menggunakan system Full Precast dengan tujuan Pembangunan yang cepat dan efisien masih menjadi pilihan yang tepat pada bangunan bertingkat seperti gedung, hotel, rumah tinggal  serta bangunan lainnya. Penulisan tugas akhir ini membahas mengenai perbandingan antara kontruksi Full Precast dan Konvensional dan berfokus pada bagian sipil yaitu, dinding, balok, kolom, pelat lantai, dan tangga pada pembangunan proyek rumah tinggal dua lantai di jakarta timur Penulisan laporan ini bertujuan untuk mengetahui perbandingan biaya dan waktu antara kontruksi Full Precast dan Konvensional dengan menganalisa harga satuan pekerjaan mulai dari upah pekerjaaan pada setiap pekerjaan dengan menggunakan Koefisien dari SNI 7394: 2008 dan peraturan menteri pekerjaan umum nomor 28/PRT/M/2016 untuk kontruksi Konvensional dan SNI 7832:2017 untuk kontruksi Full Precast, dan untuk harga material kontruksi menggunakan harga DKI jakarta tahun 2021 dengan hasil biaya kontruksi Full Precast sebesar Rp 361.937.395 dan biaya kontruksi Konvensional sebesar Rp. 323.920.013 dan kontruksi Konvensional lebih hemat Rp 38.017.382 dengan persentase selisih biaya sebesar 5,55% dan waktu pengerjaan kontruksi Full Precast selama 21 hari kerja sedangkan Konvensional selama 78 hari kerja lebih lama 57 hari kerja dengan selisih persentase waktu sebesar 21,21%
ANALISIS PENGUJIAN KUAT TEKAN CAMPURAN ASPAL BETON (LASTON AC-WC) DENGAN PARAFIN
Authors: Andrianingsih Lia , Artiwi Nila Prasetyo , Huda A Saiful
Published: February 2022

Lapis aspal beton (Laston) – lapis Aus (Asphalt Concrete – Wearing Course) terbuat dari agregat yang terdiri dari fraksi kasar, fraksi halus, dan fraksi bahan pengisi (filler) sebagai bahan pengisi dan aspal (bitumen) sebagai bahan pengikat. Berdasarkan bentuknya, agregat yang digunakan dikelompokkan sebagai agregat berbentuk bulat, kubus, lonjong, pipih dan tak beraturan. Bentuk agregat pipih kurang baik digunakan sebagai bahan laston karena sifatnya mudah patah. Dalam penelitian ini dilakukan pencampuran aspal Laston AC-WC dengan bahan pengikat berupa Parafin. Tujuan dari penelitian ini adalah untuk mengetahui nilai uji kuat tekan serta nilai stabilitas dengan pemakaian kadar aspal optimum menggunakan bahan aditif parafin, kemudian membandingkannya dengan campuran aspal Laston AC-WC tanpa modifikasi tambahan parafin. Penelitian ini menggunakan metode eksperimental dengan metode analisis kualitatif deskriptif, bahan aditif yang digunakan adalah parafin dengan persentase 1%, 3% dan 5% dari berat aspal. Pengujian awal dengan alat uji marshall untuk mendapatkan nilai stabilitas dan flow, pengolahan data penelitian menggunakan metode korelasi. Dari hasil uji kuat tekan yang telah dilakukan terhadap campuran aspal Laston AC-WC dengan penambahan parafin mempunyai nilai yang lebih rendah yang  mencapai nilai 3,33 N/mm² pada setiap karakteristik dibandingkan dengan tanpa adanya campuran atau penambahan parafin yang mencapai nilai 4,03 N/mm². Sehingga campuran ini tidak memengaruhi adanya tingkat perkerasan aspal.
The Effect of Profitability and Corporate Size on Company Value with Good Corporate Governance as a Moderating Variable in Manufacturing Companies
Authors:   Universitas Prima Indonesia, Hafiz Muharsyah
Published: February 2022

Manufacturing companies are chosen as the object of research because manufacturing companies listed on the Indonesia Stock Exchange (IDX) each year are developing and consist of various industrial sub-sectors so as to reflect the overall capital market reaction. This research aims to find out the effect of profitability and the size of the company on the value of the company with good corporate governance (GCG) as a moderator variable, as well as whether good corporate governance (GCG) is able to moderate the relationship between profitability and the size of the company to the value of the company. The population in the study was a company. The population in the study is a Manufacturing company listed on the Indonesia Stock Exchange (IDX) in the period 2018-2020. Samples collected using the purposive sampling method totaled 31 companies determined as samples. The methods used in this study are descriptively quantitative, and the nature of the research is explanatory. The data collection techniques used are documentation as well as the types and sources of data used are secondary data. The study used partial least square (PLS) data analysis methods. The results showed that profitability affects the value of the company, the size of the company has no effect on the value of the company, Good Corporate Governance (GCG) is not able to moderate the relationship between profitability and the size of the company to the value of the company.
Size Company as Moderator the Influence of Rofitability and Leverage on Stock Return in Manufacturing Companies in Indonesia
Authors:   Faculty of Economics and Business Gajayana University Malang, Maroef Maxi
Published: February 2022

This study aims to examine the effect of profitability and leverage on stock returns through the role of firm size as moderator. The Research population used manufacturing companies. There are 143 companies listed on the Indonesia Stock Exchange for the 2015-2019 period. The sampling technique used purposive sampling method, and the amount of samples was 36 companies. The test results provided evidence that profitability and leverage have a positive and significant effect on stock returns, as well as the moderator variable, namely firm size strengthened the effect of profitability and leverage on stock returns.
The Implementation of Good Corporate Governance in BUMD Institutions
Authors:   Faculty of Economic and Business, Udayana University, Indonesia, Rustini Ni Komang Ayu
Published: February 2022

This study talks about how many Regional-Own Enterprises (BUMD) there are in the Indonesian economy. In this study, we look at the institutional aspects of BUMD, how BUMD helps the local economy, and how Good Corporate Governance (GCC) is used to run BUMD. The method used is to look at research articles from a variety of sources to learn about them. Government Regulation No. 54 of 2017 on Regional Owned Enterprises already has rules and regulations in place to make BUMD a legal entity that is owned by a regional government. This is because BUMD doesn't do a good job of running things, which means that the results haven't been able to generate new revenue that's equal to a big chunk of regional income. BUMD must be able to be run in accordance with Good Corporate Governance in order to make sure that local businesses are run properly and to help the region.
WEB TABANLI PSİKOLOJİK DESTEK UYGULAMALARI ÜZERİNE MİNÖR BİR DEĞERLENDİRME: AVANTAJLAR-SINIRLILIKLAR
Authors: ACAR Hatice
Published: February 2022

Teknolojik gelişme ve ilerleme antik zamanlardan beri insan hayatını şekillendirmektedir. Web tabanlı psikolojik destek uygulamaları da teknolojik gelişmeler sonucunda hayatımıza girmiştir. Pandemi ile birlikte, web tabanlı psikolojik destek uygulamaları çok daha fazla ruh sağlığı uzmanı ve danışan tarafından tercih edilmeye başlanmıştır. Web tabanlı psikolojik yardım uygulamaları, uzman ile danışanın birbirinden uzak olmalarına karşın eş zamanlı olarak bir araçla iletişim kurdukları bir terapi modelidir. Makalede bu modelin avantajları ve sınırlılıkları üzerinde durulmuştur. Sonuçlar web tabanlı psikolojik yardım uygulamalarının avantajları olduğu gibi dezavantajları olduğunu da açık biçimde göstermektedir. Bununla birlikte bu modelin sunduğu avantajların, dezavantajlarından daha ağır bastığı ifade edilebilir. Bu modelin önümüzdeki yıllarda hem ruh sağlığı uzmanları hem de danışanlar tarafından daha fazla tercih edileceği düşünülmektedir.
Tingkat Kemandirian Lansia Dalam Pemenuhan Activity Daily Living (ADL) di Panti Pemenang Jiwa
Authors: Purba Emeliana Putri , Veronika Anita , Ambarita Bernadetta , Sinaga Desriati
Published: February 2022

Lanjut usia sebagai individu sama halnya dengan klien yang digambarkan oleh Orem yaitu suatu unit yang juga mengehendaki kemandirian dalam mempertahankan hidup, kesehatan dan kesejateraannya. Kemandirian pada lanjut usia tergantung pada kemampuan status fungsionalnya dalam melakukan aktivitas sehari–hari. Kemandirian merupakan sikap individu yang diperoleh secara komulatif dalam perkembangan dimana individu akan terus belajar untuk bersikap mandiri dalam menghadapi berbagai situasi di lingkungan, sehingga individu mampu berfikir dan bertindak sendiri. Penelitan ini bertujuan untuk mendeskripsikan gambaran tingkat kemandirian lansia dalam pemenuhan activity daily living (adl) di panti pemenang jiwa simpang selayang kecamatan medan tuntungan kota medan tahun 2021.
Penelitian ini menggunakan metode deskriptif. Teknik pengambilan sampel penelitian ini dengan menggunakan teknik purposive sampling dengan jumlah sampel sebanyak 20 lansia yang berada dipanti pemenang jiwa simpang selayang. Instrument penelitian ini menggunakan kuesioner Indeks Katz.
Hasil : Didapatkan dari hasil penelitian bahwa tingkat kemandirian pada lansia tergolong mandiri total yaitu sebanyak 18 orang (90 %), tergantungpaling ringan, tergantung ringan, tergantung sedang,tergantung total didapatkan hasil lansia  sebanyak 0(0) , sedangkan tergantung berat sebanyak 2 orang (10%). Bagi lansia diharapkan untuk tetap melakukan aktifitas sehari-hari agar bagian tubuh bisa bergerak dan tidak ada gangguan imobilitas, tetap mengontrol kesehatan ke posyandu, puskesmas atau pelayanan kesehatan lainnya.
O MOEDOR DE POBRES – NADA ATRAPALHA TANTO A SUA VIDA QUANTO O SISTEMA
Authors: Magera Conceição Márcio , T. P. Conceição Joelma , Costa Ricardo
Published: February 2022

Resenha do livro - O MOEDOR DE POBRES – NADA ATRAPALHA TANTO A SUA VIDA QUANTO O SISTEMA. Autor
OSTROWIECKI, ALEXANDRE. São Paulo, 2021. LVM editora, 251 páginas.
Assessment of personal and food hygiene practices of food handlers in educational institutions in the Kwawu-East District of Ghana
Authors: Asare Antwi Evelyn
Published: February 2022

Food hygiene is one of the most pertinent issues in the food service industry today. This research sought to assess the personal and food hygiene practices of food handlers in the three boarding educational institutions in the Kwahu- East District of the Eastern Region of Ghana. The study employed the descriptive survey design. The research instrument used was questionnaire. The data were analyzed using frequencies and percentages. Results showed that foods conveyed to the dining halls were uncovered and not served at the right temperature. Aprons and hair coverings were not worn at all times during food preparation. Only 6.6% of food handlers wore gloves while cooking. It is recommended that District Assemblies should monitor the personal and food hygiene practices of food handlers not only on the streets but also in our institutions. Hand washing basins should be fixed close to washrooms in institutions and detergent provided for proper hand washing immediately after visiting the washroom.
Factors influencing teenage pregnancy in Komenda, Edina, Eguafo Abirem Municipality
Authors: Hormenu Thomas , Akutu Patrick Kwasi , Oklu Stephen
Published: February 2022

Adolescents are the most important sexually active population in our societies, and given their size and characteristics, majority are exposed to early unplanned and unprotected sexual intercourse leading to unwanted pregnancy and sometimes unsafe abortions. Teenage pregnancy has become very common in the Ghanaian society, especially among adolescents at the Primary and Junior High School (JHS) levels of education. The purpose of this study was to assess the prevalence of teenage pregnancy in the Komenda, Edina, Eguafo Abrem Municipality in the Central Region of Ghana from 2012-2016. The study employed descriptive survey design to purposively sample teenage mothers and pregnant teenagers seeking antenatal and postnatal care at the Elmina Urban Health Centre and Ankaful Leprosy/General Hospital. Questionnaire and secondary data was collected and analyzed using simple frequencies and percentages. The finding revealed 25% prevalence of teenage pregnancy among the adolescents between 2012 and 2016. Poverty, peer pressure, and the influence of the media (electronic and social) were found to be the major risk factors to influence teenage pregnancy among the participants. Birth complications and school dropouts were the major consequences of teenage pregnancy among the participants. It was concluded that the high prevalence of teenage in the municipality could also lead to high presence of sexually transmitted infections. It was therefore recommended that municipal assemblies establish trade schools as well as use successful indigenes as role models to increase students’ ambition for the future and decrease their engagement in the sexual activities. Also, condom usage should be highlighted in the schools to help those who cannot abstain to use protection.
Reaction time and speed as correlates of sports injury among students of football academics in Nigeria
Authors: Dansu Tony , O. Okuneye Rafiu , Idowu Bidemi
Published: February 2022

Sports participation carries a risk for injuries, which may in some cases lead to permanent disability or death, hence; the need for attention on prevention. Physical fitness is a factor of sports injury. However, there is lack of sufficient evidence on relationship between specific components of physical fitness and sports injuries. This study therefore investigated reaction time and speed as they relate to sports injuries among students of football academies in Nigeria. Correlational research design was adopted for this study, and purposive sampling technique was used to select 128 students from three football academies. Standardised instruments and tests were used to measure the key parameters [i.e. speed and reaction time]. Physical characteristics that included weight, height, position of play, age, dominant leg and experience. Type of injury, part of body affected, event of injury and severity were also recorded. The data collection period was twelve weeks, and the data collected were analysed using percentage, mean, and Pearson’s product moment correlation coefficient [PPMC] statistical tools. WINKS SDA package was used for analysis and hypothesis were tested at 0.05 level of significance. Findings of this study show that reaction time correlates with sports injuries sustained[r (107) =0.23, p = 0.02], while speed indicates no correlation[r (107) =0.12, p = 0.21]. It is concluded that the level of reaction time acquired and maintained by students of football academies influence the frequency of injury sustained as well as the severity of such injury; while speed level does not have any significant influence on sustenance of injury among the target group.
Model Hubungan Pendidikan dan Latihan, Akses Informasi, Norma Subjektif dengan Keberdayaan Kader Keluarga Berencana
Authors: Kristiarini Juda Julia
Published: February 2022

Latar Belakang: Tingginya laju pertumbuhan penduduk berdampak pada penyediaan pangan, bahan konsumsi non pangan, lahan pertanian, lahan perumahan, lapangan pekerjaan, pendidikan, tingkat kesehatan masyarakat, dan kualitas hidup masyarakat. Pelitian ini bertujuan mengkaji keterkaitan variabel pendidikan dan latihan (diklat), akses informasi, norma subyektif dengan keberdayaan kader KB. Metode: Desain penelitian adalah observasional tipe korelasional, dengan pendekatan survei. Jumlah sampel penelitian adalah 220 orang, yang diambil berdasarkan proportional cluster random sampling. Teknik analisis data menggunakan analisis jalur. Hasil dan Kesimpulan: Diklat tidak berpengaruh secara langsung terhadap Keberdayaan Kader KB. Akses Informasi berpengaruh langsung terhadap Keberdayaan Kader KB. Diklat berpengaruh langsung terhadap Norma Subyektif. Akses Informasi berpengaruh langsung terhadap Norma Subyektif. Norma Subyektif berpengaruh langsung terhadap Keberdayaan Kader KB. Norma Subyektif mampu memediasi pengaruh Diklat  terhadap Keberdayaan Kader KB. Norma Subyektif mampu memediasi pengaruh Akses Informasi terhadap Keberdayaan Kader KB.
Inventory Management
Authors: V. Jhansi  , T. Ilakkiya  , Dr. K. Baranidharan  , Dr. S. Helen Roselin Gracy  , Dr. P. S Immaculate
Published: February 2022

This study focuses on the management of inventories which become important in cost maximization and profit maximization. In this project, the contribution of inventories irrespective of its size, nature and an adequate level of inventory to carryout business operations and thus inventory becomes an important and integral part of business. It helps to maintain the right level of supply and reducing loss to goods or materials before they become a finished product are sold to the customer. The study which is explained in detail based on the secondary data. The tools like EOQ analysis, ABC analysis, Inventory turnover ratio and FSN analysis are used for this project. It helps to identify the factors in a company’s success or failure. The data are being analyzed and arrived at findings and suggestions to measure the efficiency of the inventory management. This study also suggests the way to improve the satisfactory level of inventory management.
Apathy Level, Disinhibition, and Psychiatric Conditions Are Related to the Employment Status of People With Traumatic Brain Injury
Authors: Funayama Michitaka , Nakagawa Yoshitaka , Nakajima Asuka , Kawashima Hiroaki , Matsukawa Isamu , Takata Taketo , Kurose Shin
Published: February 2022

Importance: An understanding of the potential prognostic factors as they relate to the employment status of people with traumatic brain injury (TBI) is necessary so that occupational therapy practitioners can provide the most effective treatment.

Objective: To examine the impact of apathy, disinhibition, and psychiatric conditions on employment status after TBI.

Design: An observational study conducted from March 2015 to March 2020.

Setting: Cognitive dysfunction clinics associated with two general hospitals in Japan.

Participants: Japanese people of working age (N = 110, ages 18–65 yr) with TBI.

Outcomes and Measures: As an outcome indicator, each participant’s employment status was rated on a 3-point scale (i.e., 3 = regular employment, 2 = welfare employment [employed as a person with disabilities or undergoing vocational training in the Japanese welfare employment system, for which a worker is paid under either system], 1 = unemployment). Psychiatric, neuropsychological, and physical assessments were measured as explanatory variables. The impact of various factors on employment status was investigated using linear discriminant regression analysis.

Results: The level of apathy, disinhibition, and incidence of psychiatric conditions after TBI, as well as age and years postinjury, were related to employment status.

Conclusion and Relevance: Although this is a cross-sectional study, interventions for apathy and disinhibition, as well as management of psychiatric conditions, are recommended to help improve employment status among people with TBI.

What This Article Adds: The employment status of people with TBI is related more to apathy, disinhibition, and psychiatric conditions than to intelligence, memory function, or executive function.
PENGARUH PEMBERIAN REWARD, INSENTIF DAN MOTIVASI TERHADAP KINERJA KARYAWAN RUMAH SAKIT SILOAM MEDA
Authors: Hasan Junaidi
Published: February 2022

Tujuan penelitian ini adalah untuk mengetahui reward, insentif, dan motivasi terhadap kinerja karyawan. Metode yang digunakan adalah dengan metode deskriptif, jenis penelitian ini adalah data kuantitatif, data primer yang diperoleh melalui kuesioner. Populasi pada penelitian ini adalah seluruh karyawan pada perusahaan sebanyak 73 karyawan. Sampel yang digunakan adalah teknik sampel jenuh dimana seluruh populasi akan digunakan sebagai sampel. Teknik analisis yang digunakan adalah analisis linier berganda. Hasil pengujian yang menunjukkan bahwa secara parsial maupun simultan variabel reward, insentif, dan motivasi mempengaruhi kinerja karyawan RS Siloam Dhirga Surya Medan
Young stars
Authors: Lamzin S.A.
Published: February 2022

Sternberg Astronomical Institute of Lomonosov Moscow State University, Moscow, Universitetskij pr. 13, RussiaA brief overview of the current state of investigation of classical T Tauri and Ae/Be Herbig stars is presented. We describethe application of magnetospheric disk accretion theory to interpretation of activity of these objects. The connection betweenthe accretion and matter outﬂow from the vicinity of these stars in the form of jets and disk wind is discussed. We alsoconsider the variability of young stars caused by circumstellar dust and the role of episodic accretion in the process of starformation.
Planets — a modern view
Authors: Marov M.Ya. , Shevchenko I.I.
Published: February 2022

The modern view of planets goes far beyond the usual concept of the planets as bodies of the Solar system. The discovery ofexoplanets has immeasurably expanded the understanding of the architecture and properties of planetary systems. Majoradvances have been made in the study of the planets and minor bodies of the Solar system. However, no answers havebeen received to fundamental questions about the causes of various paths of evolution and formation of planetary naturalcomplexes. To give answers to these questions, research on exoplanets is called upon, of which more than 5000 have beendiscovered to date. Exoplanet studies provide an approach to solving the key problems of stellar-planetary cosmogony —the genesis and evolution of planets as byproduct of star formation. The most urgent problems concern the formation ofplanetary systems around stars of various spectral classes; the nature of hot Jupiters; the reasons for the predominanceof super-Earths and sub-Neptunes, which are absent in the Solar system; stability of planetary systems of binary stars,including circumbinary systems. Of particular interest are terrestrial planets with orbits in zones of “potential habitability”,studies of which open a new page in astrobiology.
RadioAstron project: calibration of the space radio telescope in flight in 2011–2019
Authors: Kovalev Yu.A. , Vasil‘kov V. , Ermakov A. , Vinyaikin E. , Lisakov M. , Popov M. , Soglasnov V. , Larionov M. , Nikolaev N. , Mironova E. , Burgin M. , Kovalev Yu.Yu. , Voitsik P. , Kutjkin A. , Alakoz A. , Shakhvorostova N. , Belousov K. , Kovalenko A. , Nizhelsky N. , Zhekanis G. , Tsubulev P.
Published: February 2022

We present results of amplitude calibration of the RadioAstron Space Radio Telescope (SRT) at wavelenghts of 1.35, 6.2,18, and 92 cm. Flux density calibrated internal noise signals and SEFDs are found to be stable within the errors at thelevel of 3–13%. We have used the ﬂux density scale by Baars et al. (1977). The known issue of the variability of calibratorswas resolved performing comparison with two other ﬂux density scales. We have resolved the issue by averaging SRT noisediode signals measured relative to Cassiopea A and Crab Nebula.
On the possibility of expanding the Tisserand constant for Jupiter-family comets in a binomial series
Authors: Abdulmyanov T. , Sokolova M. , Usanin V.
Published: February 2022

The 1st or 2nd degree binomial series expansion of the Hamiltonian of the circular restricted three-body problem expressedin terms of the Poincaré variables was used earlier to develop analytical theories of motion for the Trojan and Hilda asteroids.In the present paper we study the corresponding representation of the Tisserand constant, taking that of 6P/d’Arrest, aJupiter-family comet, as a numerical example. We show that as the 6th degree series expansion, the Tisserand constant isconserved no worse than in its conventional form.
Libration points of uniformly rotating celestial bodies with cavities
Authors: Burov A. , Nikonov V.
Published: February 2022

The problem of the existence and stability of libration points of a homogeneous gravitating uniformly rotating ball with aspherical cavity is considered. The existence and stability of relative equilibria (libration points) located outside the bodyare investigated. Bifurcation diagrams and areas of possible motion are constructed.
Non-gravitational effects in the orbital motion of space debris objects
Authors: Chuvashov I. , Levkina P.
Published: February 2022

In this work, orbital information of selected space debris objects with a high area-to-mass ratio was obtained and theirdynamic evolution was researched for 20 years ahead. Improvement of the objects’ orbits was carried out using a high-precision numerical model of motion, including the forces of light pressure, and positional observations obtained with theZeiss-2000 telescope complex of the Terskol branch of INASAN. It is shown that such objects change their orbital parametersover time, become unstable and begin to pose a threat to operating objects.The research was carried out within the state assignment of Ministry of Science and Higher Education of the RussianFederation (theme No. 0721-2020-0049)
Fast and superfast variability of line profiles in spectra of early type stars
Authors: Kholtygin A. , Valeev A. , Moiseeva A. , Yakunin I. , Burlak M. , Ikonnikova N. , Dodin A. , Kostenkov A. , Tsiopa O. , Puzin V. , Kurdoyakova M. , Sokolov I.
Published: February 2022

New results of studying the variability of line proﬁles in the spectra of bright OBA stars on minute and second time scalesare presented. The observations were carried out in 2015–2021. Nearly 11000 spectra of 22 OBA stars were obtained. Regularvariations of the line proﬁles with minute periods and amplitudes of 1–2% of the continuum level in spectra of the programstars are found.
Photometry and kinematics of star forming complexes in external galaxies
Authors: Kuzin A. , Lisitsin D.
Published: February 2022

We investigate spectral and photometric properties of star forming complexes (SFC) in external galaxies. The SFCs wereselected in 17 nearby galaxies of spiral or irregular type, having inclinations less than 45 ◦ and distances less than 15 Mpc.To identify SFCs, we developed a method based on matching sources of emission at 160µm (cold dust) and 8µm (polycyclicaromatic hydrocarbons). Using photometry in diﬀerent spectral bands, correlations between SFC properties for spiral andirregular galaxies were considered. Spectral and kinematic analysis was carried out for several SFCs, and a method to detectgas motion patterns in these SFCs was suggested.
Astrochemical study of a dense molecular clump of WB 673 filament
Authors: Ryabukhina O.L. , Kirsanova M.S. , Wiebe D.S.
Published: February 2022

We present results of modelling of dark interstellar cloud WB 673 with the PRESTA astrochemical model. We searchedfor the best agreement between the simulated and observed molecular abundances in a wide range of model physicalparameters, and found it satisfactory at the model time t ≈ 5 · 10 5 years. The model with observed temperature and gasdensity distribution and a cosmic ray ionization rate of ζ = 1.3 · 10 −17 s −1 gives a minimum discrepancy between thesimulated and model abundances.
Investigation of Galactic cirri based on SDSS Stripe 82 images
Authors: Savchenko S. , Polyakov D. , Mosenkov A. , Marchuk A. , Il’in V. , Gontcharov G. , Smirnov A. , Usachev P.
Published: February 2022

Galactic cirri are ﬁlamentary structures observed at high Galactic latitudes. Because of their rather large spatial scales, itis better to study them using images of wide-angle sky surveys. In this work, we use deep optical images from Sloan DigitalSky Survey (SDSS) Stripe 82 database to study Galactic cirri. We propose a semi-automatic algorithm based on artiﬁcialneural networks for data analysis. The algorithm allows one to ﬁnd regions of images that contain cirri and to determinethe cirri parameters, including their optical colours.
Active asteroids of the Main Belt as probable relics of the formation processes of giant planets
Authors: Busarev V.V.
Published: February 2022

The discovery and study of cometary activity of some bodies in the Main-Belt of asteroids (MBA) over the past decadeallowed us suggest that the most common cause of this phenomenon is a signiﬁcant content of water ice in the subsurfacelayers of primitive asteroids. Accordingly, this may be a sign of the formation of such asteroids (or their parent bodies)behind the snowline. As demonstrated analytical calculations performed more than 50 years ago [1], a sharp increase inthe number and total mass of stone-ice bodies behind the snowline let possible the runaway growth of giant planets there,especially Jupiter. As follows from predominately hydrogen content of Jupiter’s atmosphere, its core probably formed overa few ﬁrst million years due to the accretion of smaller bodies. However, should keep in mind that this process graduallychanged into its opposite. When the core of a giant planet is reaching several masses of the Earth, the capture and absorptionby it of smaller bodies is replacing by their gravitational ejection far beyond the zone of formation. Thus, all giant planetsmight have alternately turned (starting with Jupiter and ending with the most distant Neptune in accordance with thechronology of their formation) into “transporters” of small bodies of rock-ice composition from their zones of formation toother regions of the early Solar System including the MBA, where they now could be observed as active asteroids.
Ephemerides of the Neptune’s satellites
Authors: Dolgakov I.
Published: February 2022

Planetary satellite’s ephemerides are valuable for spacecraft mission planing. Moreover, precise numerical theories of thenatural satellites motion make it possible to improve the precision of their central planet’s ephemeris using the positionalobservations of their satellites. This paper describes the numerical theories of the Neptune’s satellites — Triton, Nereidand Proteus constructed using the modern CCD ground-based observations as well as space-based observations from theVoyager 2 ﬂyby mission.
Impact flare in exosystems: optical manifestation
Authors: Ibrahimov M.A.
Published: February 2022

A general discrepancy of statistics observed for known population of exosystems (exoplanets, exocomets and exosateroids)is noted. The most populated exosystem objects (i.e. exoasteroids) demonstrate the most poorly optic/IR manifestation. Sofar, only 2 events observed in IR are interpreted as an exoasteroid manifestation. In the paper, recently found unusual “redﬂare” on stars are also supposed to interpret as an exoasteroid manifestation but in optic. Observed red ﬂares are suggestedto be an impact ﬂare of asteroid in some exosystem. Main optic features of observed red ﬂares are presented and discussed.
Variations of the wind speed at the top cloud layer in equatorial latitudes according to results of long-term observations of VMC (Venus Express) and UVI (Akatsuki)
Authors: Patsaeva M.V. , Khatuntsev I.V. , Turin A.V. , Zasova L.V.
Published: February 2022

Wind vectors derived by processing data of UV (365 nm) images obtained by Venus Monitoring Camera (VMC) onboardVenus Express spacecraft from 2006 to 2013 and by Ultraviolet Imager (UVI) onboard Akatsuki from 2016 to 2019 wereused to study mesosphere dynamics. We found that the trend of the mean zonal wind speed at South equatorial latitudesof Venus changed from upward to downward in time period from 2014 to 2015. Analysis of the longitudinal dependence ofthe average zonal velocity, obtained from both the VMC and the UVI data, reveals decrease in wind speed associated withAphrodite Terra.
Magneto-rotational evolution of neutron stars with hysteresis effect and fallback
Authors: Khokhriakova A. , Popov S.
Published: February 2022

In recent years, accreting neutron stars (NSs) in X-ray binary systems in supernova remnants have been discovered. Theyare a puzzle for the standard magneto-rotational evolution of NSs, as their age (. 10 5 years) is much less than expectedduration of the preceding Ejector and Propeller stages. To explain such systems, we consider rotational evolution of NSswith fallback accretion and asymmetry in direct/backward transitions between Ejector and Propeller stages. It is shownthat at certain values of the initial period and the magnetic ﬁeld, a young neutron star may not enter the Ejector stageduring its evolution.
Simulations of black hole observations with space-ground interferometers
Authors: Mikheeva E. , Repin S. , Lukash V.N.
Published: February 2022

We consider the black hole (BH) shadow images which can be restored by data processing and image recovery proceduresin future Space VLBI (Very Large Baseline Interferometry) missions. For sources SgrA ∗ , M87 ∗ and M31 ∗ we consider threekinds of observation: the ground-based interferometer, space-ground interferometer with a satellite at low geocentric orbit,and space-ground interferometer with a satellite located in Lagrange point L 2 . We report that the second case is the mostpreferable for the BH shadow observations among considered ones. The demo images for all the cases are presented.
Change of the structure and physical properties of optical pulsations from transitional millisecond pulsar J1023+0038
Authors: Tanashkin A. , Beskin G. , Karpov S. , Plokhotnichenko V. , Shibanov Yu. , Zyuzin D.
Published: February 2022

In this paper we present some results of high temporal resolution multichannel optical observations of a transitional mil-lisecond pulsar J1023+0038 with the panoramic photometer-polarimeter mounted on the 6-meter BTA telescope of SpecialAstrophysical Observatory. Besides the double-peaked optical pulsations with the neutron star rotation period, similar tothose reported by other authors, during one of the nights we observed dramatic state change of the system. For about 230seconds instead of typical double-peaked structure single peak with strongly increased amplitude was seen. Simultaneousobservations in two channels also allowed us to detect energy redistribution in the spectrum of the system in this event. Wealso note chaotic orbital phase changes of the signal with maximum amplitude of about 25 seconds, corresponding to thelinear shifts of about 3000 kilometers.
Observation of solar flare intensity curves and comparing them with stellar flares
Authors: Kupryakov Yu.A. , Bychkov K.V. , Belova O.M. , Gorshkov A.B. , Heinzel P. , Kotrč P.
Published: February 2022

We present intensity curves of solar ﬂares obtained in the Hα hydrogen line and CaII H, CaIR 8542Ålines using multichannelspectrographs Ondřejov Observatory (Czech Republic) for the period 2000–2012. The general behavior of observed intensitycurves is practically the same for all ﬂares and is consistent with temporal variations of X-ray emission. However, our resultsdiﬀer signiﬁcantly from those obtained by other authors for selected ﬂare stars, for example, AD Leonis. EV Lac. YZ Cmi.We tried to explain the diﬀerence in the behavior of Ca II and Hα luminescence by appearance of a shock wave during aﬂare and slow heating of the plasma.
Conditions of generating a toroidal magnetic field during the period of decreasing magnetic flux of the Sun
Authors: Starkova L.
Published: February 2022

The conditions of generation of the Sun’s magnetic ﬁeld after a decrease the magnetic ﬂux in the 23rd solar cycle arestudied. It was shown that this decrease did changed the generation condition of the magnetic toroidal component in the24th solar cycle.
Flare energy release and avalanche ionization of plasma by runaway electrons in lower solar atmosphere
Authors: Tsap Yu. , Stepanov A. , Kopylova Yu.
Published: February 2022

The analysis of the electron acceleration by the quasi-stationary sub-Dreiser electric ﬁelds in the lower solar atmospherehas been done. It has been shown that the Dreiser electric ﬁeld turned out to be several orders of magnitude larger thancoronal values due to the inelastic collisions between electrons and hydrogen atoms. The ionization of hydrogen atoms givesrise to the resulting secondary electrons, which become runaway under the action of sub-Dreiser electric ﬁelds. This causesan further avalanche-like ionization of the plasma and leads to the acceleration of the large number of fast electrons up torelativistic energies at small (. 100 km) distances.
Activity Complexes on the Sun in Cycle 24
Authors: Yazev S. , Tomozov V. , Isaeva E.
Published: February 2022

We have compiled a catalog of activity complexes (AC) in cycle 24 and revealed the main parameters of AC evolution inthe cycle. A total of 118 ACs were identiﬁed in cycle 24. New ACs occur mostly near the existing ACs. From cycle 21 to24, the north-south asymmetry in AC spatial distribution increases, and the power of AC decreases monotonically. Thereare coronal holes near all the ACs. About 80% of all M- and X-class X-ray ﬂares occurred in ACs.
Sources of the survey on the declination of microquasar GRS 1915+105
Authors: Bursov N. , Trushkin S. , Kudryashova A. , Tsybulev P. , Borisov A. , Khabibullina M. , Kuandykova D.
Published: February 2022

With the RATAN-600 radio telescope, we have detected about 1300 radio sources at 4.7 GHz frequency, identiﬁed withsources from other catalogs, mostly from the NVSS catalog at 1.4 GHz. From 6 June 2020 to 28 May 2021, the strip (width∼ 35 ′ ) of the sky on the microquasar GRS 1915+105 declination (Dec = +11 ◦ 56 ′ 44 ′′ ) was observed with a four-beamcomplex of four-channel sensitive radiometers, established in the focal line of the ’Western sector’ antenna of the RATAN-600. We summarized the data received in narrow channels to obtain maximum sensitivity of the ﬂux (∼ 3 mJy/beam) inthe 600 MHz frequency band at the center 4.7 GHz frequency. This value is constrained only by the eﬀect of confusion foran antenna beam with dimensions about 1 ′ × 35 ′ . We obtained about 20–25 high-quality day records divided by hours everymonth and 12 average hour drift scans for a year. We plotted and analyzed the light curves for bright variable sources forall 365 days. We identiﬁed the detected sources with the objects from the CATS database to plot compiled radio spectra ofthe sources. Most sources were identiﬁed as galaxies and quasars. Some supernova remnants were detected in cross-sectionsof the Galactic plane.
Investigation of fast radio bursts on the BSA radio telescope of the Lebedev Physical Institute
Authors: Fedorova V. , Rodin A.
Published: February 2022

A comparative analysis of the observational characteristics of fast radio bursts at the frequencies of 111 and 1400 MHz iscarried out. Distributions are constructed with respect to the dispersion measure of radio bursts, which at both frequenciesare described by a lognormal distribution with parameters µ = 6.2, σ = 0.7. The dependence of the scattering value τ sc (DM )on the dispersion measure at 111 and 1400 MHz is also constructed, which is fundamentally diﬀerent from the dependencefor pulsars. Comparative analysis of the relationship τ sc (DM ) at 1400 MHz and 111 MHz showed that the dependence forboth frequencies has the form τ sc (DM ) ∼ DM k , where k = 0.49 ± 0.18 and k = 0.43 ± 0.15 for the frequencies 111 and 1400MHz, respectively. The obtained dependence is explained by the theory of the extragalactic occurrence of fast radio burstsand the negligible contribution of intergalactic media to their scattering. From the dependency τ sc (DM ) a total estimate ofhostthe contribution to the DM of the matter of the halo of our and the parent galaxy is obtained DM halo + DM≈ 60 pc/cm 3 .1+zBased on the Log N - Log S dependence, the average spectral index of radio bursts α = −0.63 is derived.
Radio properties of quasars at z ≥ 3
Authors: Sotnikova Yu. , Mufakharov T. , Mikhailov A. , Mingaliev M. , Kovalev Yu.
Published: February 2022

We studied the radio properties of optically selected quasars with z ≥ 3. The sample constructed with quasars having theﬂux densities S 1.4GHz ≥ 100 mJy at z ≥ 3 and S 1.4GHz ≥ 20 mJy at z ≥ 4. The observations were conducted in 2017–2021with the radio telescope RATAN-600. Using the multifrequency quasi-simultaneous data we revealed that a peaked spectralshape is a common feature for 50% of bright high-redshift quasars, the majority of them are radio-loud with log R > 2.5. Ourdata did not reveal any signiﬁcant correlation between the redshift and spectral index. The average ﬂux density variabilityof quasars are about V ar S = 0.2 − 1.0 at 4.7–11.2 GHz.
Interstellar extinction at high Galactic latitudes across the whole dust layer in the Galaxy
Authors: Gontcharov G. , Mosenkov A. , Il’in V. , Marchuk A. , Savchenko S. , Smirnov A. , Usachev P.
Published: February 2022

By use of various methods we estimate interstellar extinction at high Galactic latitudes across the whole dust layer inthe Galaxy in a variety of photometric ﬁlters. First, we compare reddening estimates from the 3D map of Green-2019(i) inside and (ii) around 23 Galactic globular clusters, i.e. where (i) the estimates are obtained from the Pan-STARRSphotometry of the cluster stars and (ii) estimates from the Schlegel-1998 (SFD98) map are used due to the lack of thestars in Pan-STARRS. The estimates (i) turn out to be systematically higher than (ii) by E(B − V ) = 0.04 mag. Thismeans that SFD98 underestimates low reddenings by the value E(B − V ) = 0.04 mag. Second, we estimate extinction fromcomparison of photometric observations and theoretical isochrones for 43 Galactic globular clusters. The lowest extinctionis A V = 0.1 mag. Third, we analyze the spatial variations of the observed colours for an unprecedentedly large and completesample of 101810 clump giants with precise parallaxes and photometry from Gaia DR2 and WISE. This sample is selectedby us in the space cylinder with a radius of 700 pc around the Sun and a height of 3600 pc across the whole Galacticdust layer. Until now, complete samples of stars with precise distances and photometry have not been considered at such alarge distance from the Galactic plane. This explains our unexpected results: the Galactic dust layer appears thicker thanpreviously thought - the extinction continues to increase even at a distance of |Z| > 400 pc from the plane of the Galaxy;the mean extinction across the whole half-layer below or above the Sun is A V = 0.2 mag. Fourth, by use of the 3D reddeningmaps of Gontcharov-2017, Lallement-2019, and Green-2019 we calculate the most probable parameters for a new version ofour 3D model of the dust spatial distribution in a wide Galactic neighbourhoods of the Sun. Comparing with other models,our model provides the most accurate predictions of the observed colours of the above mentioned sample of 101810 clumpgiants. This comparison predicts the median reddening E(B − V ) = 0.06 mag for high latitudes |b| > 50 deg, and the dustcontainer of the Gould Belt provides up to a half of this reddening.
Determination of the degree of star concentration in globular clusters based on space observation data
Authors: Nuritdinov S. , Rastorguev A. , Tadjibaev I.
Published: February 2022

Using the widely known simplex method of minimizing the square of the diﬀerence between the observed and theoreticaldensities, we have found the corresponding free parameters for globular clusters. As observational data we have taken mostlythe density proﬁles constructed by [1] based on a combination of Hubble Space Telescope and ground-based data. One ofthe free parameters of our model characterizes the concentration of stars toward the globular cluster center. Errors for freeparameters of the model are calculated.
Parametrization of long-period eclipsing binaries
Authors: Pakhomova P. , Berdnikov L. , Kniazev A. , Katkov I. , Malkov O.
Published: February 2022

One of the important sources for independent determination of stellar masses are eclipsing binaries with components on theMain Sequence, and with observable spectral lines of both components. The parameters of such stars are used to constructthe mass-luminosity relation for stars of high and intermediate masses. Among them, the type of long-period eclipsingbinaries stands out, the parameters of which are currently not fully determined, which is associated with the diﬃcultiescaused by the need for long-term observations. In this article we will review the currently available observational data forsuch objects and discuss the prospects for their use to determine stellar masses.