bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Breeds on Milk Yield and Persistency of Cows Raised under Extensive Management System in Nigeria
Authors:   Department of Animal Production and Health Federal University Wukari, Taraba State Nigeria, Dauda Ayuba , Idi Yusuf ,   Department of Animal Science College of Agriculture Federal University Agriculture Zuru, Nigeria
Published: October 2023

Milk persistence in dairy cows is an economically important trait that will determine profit for the dairy industry and will help to overcome immeasurable diseases in dairy. cows. This study looked at the best breed that will maintain persistency for a certain time and ranked the animals based on milk yield and persistency. The study used a total of 60 nursing cows, 20 Sokoto Gudali, 20 White Fulani, and 20 Red Bororo were used for the daily milk collection. The total milk collected in a week was added together and divided by seven days to get the average daily milk yield for each breed (Sokoto Gudali, White Fulani and Red Bororo). The duration of the milking periods was recorded in days. Persistency of milk yield was computed by the ratio of the lactation period and divided into four equal periods of 30 days each. The total 30-day milk yield of each period per cow was calculated. Data collected were analyzed using the general Linear Model of the SAS program while significant means were separated using the Duncan Multiple Range Test. The results revealed that the Sokoto Gudali cows yielded significantly (P < 0.05) higher daily milk (4.13 - 4.31 L/day) whereas Red Bororo (0.72 - 0.94 L/day) was lowest in week 1. At week two, Sokoto Gudali (4.09 - 4.31 L/day) had the highest milk whereas Red Bororo (0.82 - 1.04 L/day) was the least. At week three, Sokoto Gudali (4.19 - 4.39 L/day) had a significantly (P < 0.05) higher daily milk whereas Red Bororo (0.74 - 0.90 L/day). In week 4 same trends were also observed. Sokoto Gudali (4.19) was ranked to be superior (1), followed by the White Fulani (1.62) with the breed (2) whereas the Red Bororo (0.89) was the least (3) in terms of total milk yield. The average weekly milk yield persistency showed that Sokoto Gudali and the Red Bororo breeds were maintained at high persistency from week one through week four without a significant decline. Breeds influenced daily milk yield from week 1 to week 4. The overall ranking of breeds on milk yield revealed that Sokoto Gudali was ranked the highest followed by White Fulani and the least was Red Bororo.
The Moderating Role of Public Administration in Accounting Profit and Internet-based Environmental Disclosures in Nigeria: Evidence from Manufacturing Companies
Authors:   Akwa Ibom State University, Etim Uwah Uwem , Effiong Ibanga Sunday ,   Akwa Ibom State University
Published: October 2023

This paper investigated the relationship between corporate profitability and web-based environmental disclosure in Nigeria. The manufacturing sector, representing the real sector of the Nigerian economy was selected, and the role of public administration as a moderating factor was considered as a variable. The study adopted the quantitative panel methodology of the ex post facto and correlational research design. Secondary data were extracted from the fact books of the Nigerian Stock Exchange for the period, 2014 and 2019. The 83 manufacturing companies listed on the Stock Exchange represented the population of the study. The sample used was 69. Three hypotheses were tested at a 0.05 level of significance. Multiple and simple regression analyses were used on the data collected to find the relationship between the independent and dependent variables. The findings indicated an insignificant negative relationship between web-based environmental disclosure (WED) and earnings per share (EPS) on one hand and an insignificant positive relationship between WED and return on asset (ROA) on the other. It was recommended that quoted firms can use the findings of the study to enhance their disclosure of environmental incidents while government policies should strengthen regulatory bodies to carry out their oversight functions. Listed firms should own websites and dedicate separate pages on their corporate websites solely for reporting environmental events.
PERENCANAAN KEBUTUHAN PEGAWAI BERDASARKAN ANALISIS BEBAN KERJA MELALUI METODE FTE (FULL TIME EQUIVALENT) PADA PT. X
Authors: Damayanti Mayang Kusuma
Published: October 2023

Pertumbuhan PNS di Indonesia mengalami penurunan sebesar 4,1% karena adanya modernisasi birokrasi. Hal tersebut mengakibatkan beban kerja pegawai menjadi bertambah. PT. X menjadi instansi yang terkena dampak tersebut dengan mengalami kelebihan beban kerja yang diterima pegawai dan kurangnya tenaga kerja. Tujuan penelitian ini adalah untuk mengetahui tingkatan beban kerja pegawai, mengidentifikasi kebutuhan tenaga kerja, serta alternatif untuk menciptakan beban kerja yang lebih seimbang dan jumlah pegawai yang ideal. Penelitian ini menggunakan perhitungan beban kerja melalui metode FTE (Full Time Equivalent) untuk menghitung standar beban kerja pegawai dengan tetap memperhatikan allowance. Selain itu, penelitian ini menggunakan metode wawancara kepada 5 responden yang ada di Unit Umum dan Kepegawaian untuk mengkonfirmasi kebenaran data. Berdasarkan hasil penelitian, para pegawai berpendapat adanya kemungkinan untuk menggunakan metode FTE dalam menghitung beban kerja pegawai dan terdapat 6 posisi jabatan dengan beban kerja overload, 1 posisi jabatan dengan beban kerja underload, dan 2 posisi jabatan dengan beban kerja normal. Berdasarkan perhitungan beban kerja melalui metode FTE dapat diketahui Unit Umpeg membutuhkan pegawai tambahan sebanyak 9 orang. Untuk mengatasi hal tersebut maka instansi pemerintahan dapat melaksanakan pengadaan tenaga kerja, mutasi, dan pembagian beban kerja
Pengembangan Desa Wirausaha "Jadah" berbasis International Capability
Authors: Ayiz Abdul , Aryono Aryono
Published: October 2023

UMKM merupakan usaha ekonomi produktif milik orang perorangan dan/atau badan usaha perorangan yang telah menjadi penopang ekonomi masyarakat Indonesia. Namun pengembangan UMKM dirasa belum maksimal untuk perluasan pasar penjualan produk UMKM ke komunitas masyarakat internasional, khususnya produk UMKM Jadah Tempe Kaliurang Sleman Yogyakarta. Program pengabdian ini bertujuan untuk menjawab permasalahan utama penggiat produk UMKM Jadah Tempe Kaliurang yaitu kurangnya kemampuan mengenalkan dan mempromosikan produk mereka kepada konsumen dari luar negeri melalui bahasa Inggris baik lisan maupun tulisan serta kurangnya pemahaman mereka tentang prosedur hukum produk makanan agar layak dikonsumsi oleh masyarakat internasional. Metode dalam pelatihan ini adalah penyampaian materi oleh dua pelaksana pengabdi yang mengulas materi terkait prosedur hukum (legal procedure) produk makanan oleh pengabdi yang pertama dan materi tentang bahasa Inggris persuasif oleh pengabdi kedua. Selanjutnya semua peserta didampingi untuk menerapkan komunikasi bahasa Inggris persuasif. Dari kegiatan pengabdian ini ditemukan bahwa masyarakat semakin memahami prosedur hukum produk makanan dan bisa berkomunikasi menggunakan bahasa Inggris persuasif untuk menjangkau pasar masyarakat internasional.
MSMEs are productive economic businesses owned by individuals and/or individual business entities that have become the economic support of the Indonesian people. However, the development of MSMEs is considered not optimal for the expansion of the market for selling MSME products to the international community, especially MSME products of Jadah Tempe Kaliurang, Sleman, Yogyakarta. This community service program is aimed to answer the main problems of Jadah Tempe Kaliurang MSME product activists, namely the lack of ability to introduce and promote their products to consumers from abroad through English both oral and written and their lack of understanding of legal procedures for food products to be suitable for consumption by the international community. The method in this program is the delivery of materials by two service executors who review material related to legal procedures for food products by the first service and material on persuasive English by the second service. Furthermore, all participants were accompanied to apply persuasive English communication. From this service activity, it was found that people increasingly understand the legal procedures of food products and can communicate using persuasive English to reach the international community market.
Haukiputaan kirkkohautamuseo
Authors: Väre Tiina , Lipkin Sanna
Published: October 2023

-
Winner Takes All - The 9 Fundamental Rules of High Tech Strategy
Authors:   RethinkX, Seba Tony
Published: October 2023

‘Winners Take All’ shows the strategies and tactics, the business and marketing rules that Google, Apple, Symantec, Netflix, Salesforce, Craigslist, LinkedIn, Skype, StarMine, Clickability, F5, IBM, and others have used to build their products, services, and companies into winners and how they have achieved success in the high-speed, high-greed, hyper-competitive world that creates new industries, transforms old ones, and generates unimaginable new wealth in no time flat: Silicon Valley. Written by a successful Silicon Valley entrepreneur, lecturer at Stanford University, business architect, mentor capitalist, consultant and advisor and mentor to CEOs and entrepreneurs, this book contains the strategies, analytical templates, step-by-step implementation frameworks, and tools that these winners have successfully used to build their billion-dollar companies. The virtual 'Winners Take All' portfolio (see http://www.tonyseba.com) had returns that widely exceeded the competition and the market.
Clean Disruption of Energy and Transportation: How Silicon Valley Will Make Oil, Nuclear, Natural Gas, Coal, Electric Utilities and Conventional Cars Obsolete by 2030
Authors:   RethinkX, Seba Tony
Published: October 2023

The industrial age of energy and transportation will be over by 2030. Maybe before. Exponentially improving technologies such as solar, electric vehicles, and autonomous (self-driving) cars will disrupt and sweep away the energy and transportation industries as we know it. The Stone Age didn't end because we ran out of rocks. It ended because a disruptive technology ushered in the Bronze Age. The era of centralized, command-and-control, extraction-resource-based energy sources (oil, gas, coal and nuclear) will not end because we run out of petroleum, natural gas, coal, or uranium. It will end because these energy sources, the business models they employ, and the products that sustain them will be disrupted by superior technologies, product architectures, and business models. The same Silicon Valley ecosystem that created bit-based technologies that have disrupted atom-based industries is now creating bit- and electron-based technologies that will disrupt atom-based energy industries. This is a technology-based disruption reminiscent of how the cell phone, Internet, and personal computer swept away industries such as landline telephony, publishing, and mainframe computers. Just like those technology disruptions flipped the architecture of information and brought abundant, cheap and participatory information, the clean disruption will flip the architecture of energy and bring abundant, cheap and participatory energy. Just like those previous technology disruptions, the clean disruption is inevitable and will be swift.
Mottled Petrel Pterodroma inexpectata in the Drake Passage, South Atlantic, March 2008
Authors: Espin P , Heubeck M , Scott J , Winter C
Published: October 2023

The ‘Atlantic Odyssey’ is the annual reposi- tioning trip of the Professor Molchanov, a small Expedition Cruise ship that spends the austral summer in Antarctic waters and the northern summer in the Arctic. For enthusiasts of seabirds, cetaceans, islands, and photography, the voyage from Ushuaia in Argentina south to the Antarctic Peninsula, and thence north to Cape Verde via South Georgia, the Tristan da Cunha group, St Helena, and Ascension Island provides a superb opportunity to view marine life across 70 degrees of latitude. On the morning of 11 March 2008, we were heading south on our second day in the Drake Passage, with a moderate northwest wind, two-metre swell, high thin overcast skies, and excellent visibility. At 11.20 hours (ship’s time, position 60o17’S 69o44’W) we were observing from the sun deck above the bridge when a medium-sized petrel flew close across the bow from east to west. Similar sized seabirds seen that morning were Cape Petrel Daption capense, Antarctic Prion Pachyptila desolata, Thin-billed Prion P. belcheri, and Soft- plumaged Petrel Pterodroma mollis.
Northern Fulmar Fulmarus glacialis successfully drives off a Great Skua Stercorarius skua
Authors: Mellor R
Published: October 2023

While seabird monitoring at Sumburgh Head, Shetland on 18 June 2008, I noticed a particularly bulky Northern Fulmar Fulmarus glacialis (hereafter ‘Fulmar’) on the sea, feeding on a dead Atlantic Puffin Fratercula arctica (hereafter ‘Puffin’). What caught my attention was the apparent size of the Fulmar, appearing almost twice normal! While tugging at the Puffin, it held its wings constantly half arched in a very intimidating posture, unlike anything I have seen before. The reason for this soon became evident when a nearby Great Skua Stercorarius skua flew in to try and steal the corpse, though the skua was almost certainly the original killer of the Puffin.
Common Guillemot Uria aalge chick diet and breeding performance at Sumburgh Head, Shetland in 2007–09, compared to 1990–91
Authors: Heubeck M
Published: October 2023

Chick diet of Common Guillemots Uria aalge was studied by direct observation at Sumburgh Head, Shetland during 2007–09. Lesser Sandeels Ammodytes marinus comprised 55% of prey items, the remainder being Gadidae, including Whiting Merlangius merlangus and Saithe Pollachius virens, and a few Snake Pipefish Entelurus aequoreus. This contrasts with 1990–91 when chick were fed 80% sandeels, the remainder mostly being unidentified Gadidae. When this shift from a diet dominated by sandeels took place is unknown, but a similar shift in chick diet at Fair Isle (40 km southwest of Sumburgh Head) seems to have occurred some time during 2000–02. Since 2003, weights of chicks near fledging have been lower than during the 1990s, and average breeding success has been reduced.
A pilot study of the phenology and breeding success of Leach’s Storm- petrel Oceanodroma leucorhoa on St Kilda, Western Isles
Authors: Money S , Söhle I , Parsons M
Published: October 2023

From June to September 2007, 27 occupied Leach’s Storm-petrel Oceanodroma leucorhoa burrows on St Kilda were investigated by endoscope to estimate phenology and breeding success. From 17 burrows that could be followed to chick development, a minimum productivity of 0.59 young per egg laid was estimated, similar to other published figures of breeding success from the northwest Atlantic. Similar life cycle timings to those of Leach’s Storm-petrels in the northwest Atlantic were revealed, with egg laying in late May to mid June, hatching in mid to late July and fledging from mid September onwards. Implications for conservation and monitoring are discussed, and guidance for future studies suggested.
Evidence of breeding White-faced Storm-petrel Pelagodroma marina on St Helena Island, South Atlantic: vagrancy or a relict from human pre- colonisation?
Authors: Bolton, M , Watt R , Ellick G , Scofield P
Published: October 2023

During an overnight ringing expedition to the Oceanodroma storm-petrel colony on Egg Island, St Helena in July 2009, a White-faced Storm-petrel Pelagodroma marina was found on the ground under an open mist net. The bird was easily captured and close examination in the hand, together with subsequent inspection of photographs, showed that the bird was recently fledged. Biometrics and timing of fledging preclude provenance from the closest colony on the Tristan da Cunha archipelago and the pristine nature of the plumage render an origin from the northerly colonies of Cape Verde or the Selvagens Islands, around 4,000 km distant, unlikely. We suggest this bird probably fledged locally, quite possibly on Egg Island itself, where the substratum is suitable for burrowing. The length of the bird’s tarsus was within the range of sub-fossil specimens from St Helena, which show the species was once widespread and abundant there. This recently-fledged individual raises the possibility that a relict population may persist on one or more of the predator-free offshore stacks that surround the St Helena mainland.
A survey of Leach’s Oceanodroma leucorhoa and European Storm-petrel Hydrobates pelagicus populations on North Rona and Sula Sgeir, Western Isles, Scotland, in 2009
Authors: Murray S , Shewry M , Harden J , Jamie K , Parsons M
Published: October 2023

In 2001, surveys of both Leach’s Oceanodroma leucorhoa and European Storm-petrel Hydrobates pelagicus were made on North Rona and Sula Sgeir, Western Isles, Scotland, using tape playback for the first time. North Rona held 1,133 apparently occupied sites (AOS) of Leach’s Storm-petrel (1,084 AOS after re-analysis of the 2001 data in 2009) and 371 AOS of European Storm-petrel; numbers on Sula Sgeir were five and eight AOS respectively. A repeat survey in 2009 using the same methods found 713 AOS of Leach’s Storm-petrel on North Rona, a decline of about 34% since 2001, and none on Sula Sgeir. A partial survey of European Storm-petrel on North Rona found 313 AOS, suggesting no significant population change since 2001; limited time on Sula Sgeir prevented a survey there for this species. Great Skuas Stercorarius skua and Great Black-backed Gulls Larus marinus breed on North Rona and take an unknown number of storm-petrels each year, but it has yet to demonstrated whether either or both together have caused the decline in Leach’s Storm-petrel. The timing of the decline in Leach’s Storm- petrels can only be dated from 2001, because earlier population estimates are not comparable with the tape playback surveys of 2001 and 2009.
ANÁLISE DE IMPACTOS AMBIENTAIS CAUSADOS PELA FRAGMENTAÇÃO FLORESTAL
Authors: Silva Pedro Vitor de Souza , Fonseca Matheus Antunes , Fonseca Maria Fernanda Vieira , Araújo Wanderson Pereira
Published: October 2023

A fragmentação florestal é resultante de grandes impactos ambientais por dispor de invasões em diversas coberturas vegetais. Visto o grande efeito da mesma na relação ambiental, o presente trabalho surge para analisar os impactos resultantes desta, mostrando e ressaltando como tal, afeta demasiadamente a ecologia e a relação biótica disposta nas florestas. O trabalho em questão trata-se de uma pesquisa de revisão bibliográfica. Todo o levantamento foi realizado através de artigos científicos, livros e demais publicações disponíveis no site Google Acadêmico, relatando a influência e a interferência da fragmentação em todo contexto florestal, abordando a necessidade de gestões ambientais que visam a diminuição de fragmentações por atividades antrópicas. O estudo mostra que a fragmentação florestal resulta em diversos impactos ambientais. Este, também relata que tal ação, muitas vezes está relacionada com a desgovernada exploração humana. Por isso, parte a necessidade de estudos voltados a esta.
TEORIA DA PERDA DE UMA CHANCE: APLICABILIDADE JURÍDICA
Authors: da Silva Luz karine Lopes , da Costa Vanuza Pires
Published: October 2023

A privação da oportunidade refere-se à decepção causada por não alcançar uma possibilidade desejada, caso não fosse interrompida pela ação prejudicial da outra parte. Isso resulta na possibilidade de buscar compensação legal. Recentemente, muito se tem debatido acerca dos critérios de aplicação no Direito brasileiro. Diante disso, este estudo teve a finalidade de discorrer sobre os parâmetros adotados para a aplicação da teoria da perda de uma chance no direito pátrio. Na metodologia empregada, baseou-se em uma revisão bibliográfica, com fundamento em artigos científicos, livros, periódicos e na legislação e jurisprudência atual sobre o respectivo tema. Os resultados indicaram que o conceito de compensação legal devido à frustração de uma oportunidade envolve cenários nos quais um indivíduo tem seu direito prejudicado devido a ações ilícitas de terceiros, sejam elas omissivas ou comissivas. Isso segue o padrão geral de responsabilidade civil já estabelecido. A chance deve ser real, séria e significativa e o alvo da indenização não é o resultado final que poderia ser alcançado, mas a oportunidade perdida, de obtenção de lucro ou afastamento de um prejuízo.
ADDITIONAL NOTES ON THE DYNAMICS OF THE OSCILLATORY CIRCUIT UNDER THE INFLUENCE OF A BLOCKING GENERATOR
Authors:   HSE University, Alekseeva E.S. , Rassadin A.E. ,   HSE University
Published: October 2023

A statistical description of the behavior of an ensemble of oscillatory circuits under the unfluence of blocking generators is given for the case when the pulse repetition period from the blocking generator is much longer than the period of charge oscillation in the circuit. The basis of this description is the exact solution of the Cauchy problem for the shortened Liouville equation, which is written out by the Hamilton function of the mechanical analogue of the system under consideration. An example of a countable set of explicit exact solutions of this equation is also presented.
DETAILS OF THE OCCURRENCE OF THE REVERSE WAVE IN A TRANSMISSION LINE WITH A LARGE LINEAR CAPACITY IN THE LONGITUDINAL BRANCH
Authors:   HSE University, Alekseeva E.S. , Rassadin A.E. ,   HSE University
Published: October 2023

A wide range of problems about the propagation of one-dimensional waves in various media is described by partial differential equations of hyperbolic type, so the general solutions of these equations include both forward and reverse waves. However, a number of wave theory methods have been developed only for waves propagating in only one direction. In this paper, the question of matching the description of the wave process in the framework of these two approaches is considered by the example of an electric circuit with identical four-terminal networks boundless in both directions.
CALCULATION OF RESONANT FREQUENCIES AND RADIATION PATTERNS OF GRAPHENE FRACTAL NANOANTENNA OF THE «SIERPINSKI GASKET» TYPE
Authors:   Ulyanovsk State Technical University, Brazhe R.A. , Lebedev E.Yu. ,   Ulyanovsk State Technical University
Published: October 2023

A model of graphene patch nanoantenna in the form of a fractal structure such as a triangular Sierpinski gasket designed to operate in the terahertz frequency range is proposed. For the fourth iteration of the fractal structure with the length of the triangle side corresponding to 32 graphene hexagons, the following resonant frequencies of the multiband nanoantenna were obtained: 17.2; 34.4; 68.8; 137.6 and 275.52 THz. The radiation patterns of the described nanoantenna are constructed.
PREPARATION AND PROPERTIES OF COMPOSITE BASED ON EPOXY RESIN AND GRAPHENE
Authors:   Ulyanovsk State Technical University, Popova E.D. , Makarova I.A. ,   Ulyanovsk State Technical University, Buzaeva M.V. ,   Ulyanovsk State Technical University
Published: October 2023

The results of obtaining and studying the mechanical properties of epoxy composites containing multi-walled carbon nanotubes and graphene are presented. Graphene was obtained by electrolytic method, carbon nanotubes by vapor deposition method. Composites with original and carboxylated carbon nanotubes were studied. It is shown that the addition of graphene to epoxy nanocomposites, increasing the electrical conductivity of the resulting material, improves its mechanical properties.
PREPARATION AND PROPERTIES OF EPOXY NANOCOMPOSITES
Authors:   Ulyanovsk State Technical University, Kirpicheva D.V. , Makarova I.A. ,   Ulyanovsk State Technical University, Buzaeva M.V.
Published: October 2023

A method for producing nanocomposites based on epoxy resins and multi-walled carbon nanotubes is described. A study of the mechanical properties of the obtained samples was carried out. The results obtained show an increase in tensile strength and an increase in maximum tensile force.
DFT STUDY OF THE ELECTRONIC PROPERTIES OF SYSTEMS BASED ON A3B-TYPE PORPHIN DERIVATIVE MOLECULES
Authors:   Saratov State University, Mironyuk V.N. , Kasatkina M.A. ,   Saratov State University, Karatyshova T.Ya. ,   Saratov State University, Gavrikov M.V. ,   Saratov State University, Smirnova A.I. ,   Ivanovo State University, Usoltseva N.V. ,   Ivanovo State University, Glukhovskoy E.G. ,   Saratov State University
Published: October 2023

This paper presents the results of a study of molecular models consisting of single molecules of 5-(4-hydroxyphenyl)-10,15,20-tris(4-hexadecyloxyphenyl) porphine (PP), their dimers, as well as a complex of a PP molecule with H3PO4, by methods DFT.
THEORETICAL ANALYSIS OF THE ELECTRONIC BAND STRUCTURE OF HEXAGONAL POLYTYPES OF A SiGe SOLID SOLUTION
Authors:   Lobachevsky University, Chizhova A.A. , Konakov A.A. ,   Lobachevsky University
Published: October 2023

This work is aimed at a theoretical study of the structure and properties of solid solutions of polytypes of group IV elements (mainly SiGe) by modeling the band structure using the empirical pseudopotential method. It is shown that an increase in the degree of hexagonality from zero (3C-Si) to unity (2H-Si) leads to a decrease in the band gap and the direct energy gap.
METHOD FOR REDUCING BLIND ZONE OF CIRCULAR SURVEILLANCE RADAR
Authors:   Ulyanovsk Mechanical Plant, Kostyaev P.V. , Nabiulin M.M. ,   Ulyanovsk Mechanical Plant, Pohvalov S.I. ,   Ulyanovsk Mechanical Plant, Terentyev M.A. ,   Ulyanovsk Mechanical Plant
Published: October 2023

A variant of modernization circular surveillance radar with phased antenna array on linear emitters. Proposed a method to reduce the radar blind spot by reducing the time of transients on switching antenna reception and transmission modes.
THERMAL VISION STUDIES OF SOLAR CELLS
Authors:   Ulyanovsk Branch of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Gavrikov A.A. , Smirnov V.I. ,   Ulyanovsk Branch of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences,   Ulyanovsk State Technical University
Published: October 2023

The results of a thermal imaging study of the temperature field of monocrystalline solar cells, which were previously studied for the presence of a correlation between the thermal resistance and the efficiency of solar cells, are presented. Thermal imaging studies have confirmed that solar cells with lower thermal resistance and better efficiency have a more uniform temperature field distribution and a lower peak surface temperature.
RESEARCH OF A NEW GENERATION OF MICROWAVE MICROELECTRONIC DEVICES FOR USE IN AVIATION ELECTRONICS
Authors:   Ulyanovsk State Technical University, Ilyin P.A. , Potapov K.A. ,   Ulyanovsk State Technical University, Fokin O.S. ,   Ulyanovsk State Technical University
Published: October 2023

The results of an analysis of the use of microwave devices and their systems are presented, with an emphasis on their application in radar. Modern radar methods are considered. The influence of microwave radiation on individual design elements of electronic equipment and protection methods are analyzed.
SOLID-STATE PULSE MODULATORS OF HIGH-POWER GENERATOR FOR MICROWAVE ELECTRIC VACUUM DEVICES
Authors:   Ulyanovsk mechanical plant, Sazonov P.S.
Published: October 2023

An overview of a pulse modulator on solid-state key elements with a transformer control circuit of individual MOSFET field-effect transistors for power supplies of highpower ultra-high-frequency vacuum devices with pulse modulation along the control electrode is presented
ORGANOMETALLIC GAS-PHASE EPITAXY GROWTH OF GALLIUM ARSENIDE ON A NON-PLANAR SURFACE OBTAINED BY ETCHING IN CHLORPENTAFLUOROETHANE PLASMA
Authors:   Institute for Physics of Microstructures RAS, Okhapkin A.I. , Daniltsev V.M. ,   Institute for Physics of Microstructures RAS, Kraev S.A. ,   Institute for Physics of Microstructures RAS, Korolyov S.A. ,   Institute for Physics of Microstructures RAS, Arkhipova E.A. ,   Institute for Physics of Microstructures RAS, Zorina M.V. ,   Institute for Physics of Microstructures RAS
Published: October 2023

In this work the features of organometallic gas-phase epitaxy of gallium arsenide in grooves obtained by etching in plasma of chlorpetafluoroethane were studied. It was shown that the epitaxial overgrowth depends on grooves location relative to the base cut of the substrate.
SIMS ANALYSIS OF EPITAXIAL LAYERS OF GALLIUM ARSENIDE IN NARROW GROOVES OBTAINED BY ETCHING IN CHLORPENTAFLUOROETHANE PLASMA
Authors:   Institute for Physics of Microstructures RAS, Okhapkin A.I. , Drozdov M.N. ,   Institute for Physics of Microstructures RAS, Daniltsev V.M. ,   Institute for Physics of Microstructures RAS, Kraev S.A. ,   Institute for Physics of Microstructures RAS, Arkhipova E.A. ,   Institute for Physics of Microstructures RAS
Published: October 2023

In this work, the elemental composition and the concentration distribution of silicon dopant over the thickness of the grown GaAs epitaxial layer in narrow grooves formed by etching in chlorpentafluoroethane plasma were studied.
MEASURING THE DIE OVERHEATING TEMPERATURE OF A TRANSISTOR MODULE
Authors:   Ulyanovsk Branch of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Gavrikov A.A. , Khodakov A.M. ,   Ulyanovsk Branch of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Smirnov V.I. ,   Ulyanovsk Branch of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences,   Ulyanovsk State Technical University
Published: October 2023

To test the previously developed model of heat distribution in the crystal of a transistor module, the temperature of the crystal overheating and the thermal resistance of the transistor module were measured when a given power was dissipated on it. The measurements were carried out in accordance with the standard OST 11 0944-96 and using the modulation method for measuring thermal resistance. Experiments have shown that the simulation and measurement data differ by approximately 3,5%, which confirms the adequacy of the model obtained.
PROPAGATION OF A MODULATED WAVE IN AN ACTIVE INHOMOGENEOUS FIBER
Authors:   S.P. Kapitsa Scientific Technological Research Institute, Abramov A.S. ,   Ulyanovsk State University, Lapin V.A. ,   S.P. Kapitsa Scientific Technological Research Institute,   Ulyanovsk State University, Sementsov D.I. ,   S.P. Kapitsa Scientific Technological Research Institute,   Ulyanovsk State University
Published: October 2023

In this work we considered the dynamics of propagation of a weakly modulated wave in an active light guide cascade, consisting of two active light guides with a complex profile of the dependence of dispersion on length, selected in such a way as to ensure the conversion of the original modulated wave into a sequence of amplified short pulses with a high repetition rate and peak power.
INVESTIGATION OF THE RESPONSE OF A DPPC MEMBRANE IN AN AQUEOUS SOLUTION OF NACL TO AN ALTERNATING ELECTRIC FIELD USING THE METHOD OF CLASSICAL MOLECULAR DYNAMICS
Authors:   Volgograd State Technical University, Zlochevskiy I.I. , Zav’yalov D.V. ,   Volgograd State Technical University
Published: October 2023

The results of a theoretical study of the impact of an alternating electric field on the biological structure of a coarse-grained model of a lipid membrane consisting of DPPC-lipids by the method of classical molecular dynamics are presented.
EFFECT OF PLASMON RESONANCE OF A SURFACE MONOLAYER ON THE SPECTRAL CHARACTERISTICS OF A PHOTONIC STRUCTURE
Authors:   Ulyanovsk Branch of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Glukhov I.A. ,   Ulyanovsk State University, Moiseev S.G. ,   Ulyanovsk Branch of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences,   Ulyanovsk State University
Published: October 2023

The possibility of the complete suppression of reflection of an incident electromagnetic wave by a two-dimensional array of metal nanoparticles placed in a surface layer of an one-dimensional photonic crystal structure in a narrow frequency band is shown. The influence of the parameters of the array of nanoparticles on the reflection and absorption spectra of the photonic structure in the photonic bandgap wavelength domain is determined.
THERMAL MODELING OF A MULTICRYSTAL SEMICONDUCTOR SYSTEM
Authors:   Ulyanovsk Branch of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Hodakov A.M. , Frolov I.V. ,   Ulyanovsk Branch of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences,   Ulyanovsk State Technical University, Shuravin A.D. ,   Ulyanovsk Mechanical Plant
Published: October 2023

A 3D thermal model of a multicrystalline system has been developed taking into account the thermoelectric feedback and the temperature dependence of the thermophysical coefficients of the materials of the system structure. Computational studies of the dependence of the coefficient of heterogeneity of the temperature distribution on the current strength in a multicrystalline semiconductor system have been carried out.
REDUCTION OF THE DENSITY OF ANTHIPHASE DEFECTS IN GaAs/Ge HETEROSTRUCTURES GROWN ON A SILICON-ONINSULATOR SUBSTRATE
Authors:   Lobachevsky University, Sushkov A.A.
Published: October 2023

GaAs-based AIIIBV heterostructures on the Ge/Si/SOI (001) platform are fabricated and investigated. Ge/Si layers in the platform are grown by molecularbeam epitaxy via two-stage Ge layer growth and thermocyclic annealing in the vacuum chamber. The AIIIBV layers are grown by metalorganic chemical-vapor deposition. The growth parameters of AIIIBV buffer layers, which promote annihilation of the main density of antiphase boundaries, are found. The parameters of in-situ annealing of AIIIBV buffer layers, which contribute to the reduction of the density of antiphase boundaries, as well as surface modification leading to the alignment of the growth front and, as a consequence, to the reduction of the surface roughness of the final heterostructure, are found.
INFLUENCE OF DIELECTRIC LAYER ON CAPACITIVE PROPERTIES OF ELECTROCHEMICAL CAPACITOR
Authors:   Ulyanovsk State University, Adamovich A.A. , Makhmud-Akhunov M.Yu. ,   Ulyanovsk State University, Golovanov V.N. ,   Ulyanovsk State University, Yavtushenko I.O. ,   Ulyanovsk State University
Published: October 2023

The results are presented on the effect of the dielectric layer on the capacitive properties of an electrochemical capacitor based on anodic aluminum oxide modified with a layer of conductive polymer - the emeraldine form of polyaniline. Multilayer solid-state capacitive systems were formed based on nanostructured electrodes obtained by anodic treatment of an aluminum substrate in a solution of tartaric acid followed by the deposition of a layer of polyaniline. Based on the analysis of voltammograms (VAG), the capacity of the resulting nanostructured systems was determined. It has been shown that the capacity of the resulting structures increases by an order of magnitude due to the presence of additional ions when an acid solution is added to the PVA layer.
THE EFFECT OF OPTICAL TWEEZER IN THIN QUARTZ FIBER
Authors:   Kotelnikov Institute of the Radioengineering and Electronics of Russian Academy of Sciences, Smozhny A.M. ,   RTU MIREA, Kabisov A.M. ,   Kotelnikov Institute of the Radioengineering and Electronics of Russian Academy of Sciences,   RTU MIREA, Gasin A.S. ,   Kotelnikov Institute of the Radioengineering and Electronics of Russian Academy of Sciences,   RTU MIREA
Published: October 2023

We discuss the occurrence of the phenomenon of attraction of the microalgae chlorella vulgaris in aqueous medium to the thinning fiber section when laser radiation is passed through it (optical tweezers effect).
KOTELNIKOV IRE RAS – 70 YEARS AT THE AVANTGARDE OF MODERN SCIENCE
Authors:   Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Nikitov S.A.
Published: October 2023

The report presents the history of the creation and development of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, the main scientific directions and achievements, development prospects are outlined.
ANALYTICAL METHOD FOR DETERMINING THE CONCENTRATION OF ALLOYING IMPURITY OF A SEMICONDUCTOR SENSOR ELEMENT OF A PRESSURE SENSOR USED AS PART OF AN INFORMATION-MEASURING SYSTEMS
Authors:   Penza State University, Ryblova E.A.
Published: October 2023

The article discusses an analytical method for determining the optimal concentration of dopant of a semiconductor piezoresistive pressure sensor used as part of an information-measuring systems. The study is carried out by the method of compiling an algorithm for calculating the concentration of an alloying impurity, at which the temperature dependence is minimal in the MathCAD software package. The aim of the work is to find a numerical value of the dopant concentration, which allows minimizing the temperature error of the output signal of a semiconductor pressure sensor.
QUALITY CONTROL OF SEMICONDUCTOR DIODES
Authors:   Samara National Research University, Shestakov D.A. , Bobrov I.S. ,   Samara National Research University, Andreev V.A. ,   Samara National Research University
Published: October 2023

An experimental study of the influence of structural inhomogeneities, foreign inclusions, moisture, leakage currents and other defects on the degradation of semiconductor elements and the appearance of abnormal areas on the forward and reverse branches of the volt-ampere characteristic (VAC) was carried out. An upgraded version of the m-characteristics diagnostics was tested, which allowed for (18...26)% increase the efficiency of rejection of potentially unreliable samples compared to the control of abnormal sites. The values of m-characteristics for three types of diodes are given.
IMPROVING OF ACCURACY IN THE STUDY OF THERMAL FIELDS BY IR MICROSCOPY
Authors:   SHM R&E Center, RAS, Ivanov A.E. , Chernyakov A.E. ,   SHM R&E Center, RAS,   Ioffe Institute
Published: October 2023

The paper investigates the use of a coating with high emissivity in the IR range of 2.5-3.1 μm to obtain temperature mapping of a semiconductor chip using an IR microscope. The use of such a coating has significantly increased the accuracy of temperature determination.
REPRESENTATION IN THE VHDL LANGUAGE OF THE MATRIX ELEMENT MAX
Authors:   Ulyanovsk State Technical University, Shkirdov R.V.
Published: October 2023

The paper presents a two-digit logic function applicable as a mathematical model of the matrix element MAX, which provides parallel processing m 2 of nbit binary variables. The structural VHDL model of this element formed on the basis of the proposed function is considered.
MODELING OF THE ENCRYPTION PROCESS IN MATLAB
Authors:   Volga Region State University of Telecommunications and Informatics, Naumov I.D. , Popov A.S. ,   Volga Region State University of Telecommunications and Informatics
Published: October 2023

The article presents symmetric encryption methods, such as gammations, substitutions and permutations, with an emphasis on their modeling in the MATLAB system. This environment provides powerful tools for numerical modeling and analysis, which allows researchers to better understand and evaluate the effectiveness and security of various encryption methods.
1090-ES NETWORK VULNERABILITY ANALYSIS
Authors:   Ulyanovsk Civil Aviation Institute, Nogin A.A. , Buzaeva E.A. ,   Ulyanovsk Civil Aviation Institute, Evsevichev D.A. ,   Ulyanovsk Civil Aviation Institute, Samokhvalov M.K. ,   Ulyanovsk State Technical University
Published: October 2023

The article discusses the automatic dependent surveillance - broadcast system (ADS-B) and features of its operation. The operational vulnerability of the system operating on the 1090-ES data transmission line is considered. The algorithm for calculating the error in measuring the aircraft coordinates using the ADS-B system is given.
DEVELOPMENT OF A NEURAL NETWORK FOR STRESS SITUATIONS DETERMINATION BY THE VOICE OF THE AIRCRAFT CREW
Authors:   Ulyanovsk Civil Aviation Institute, Mikhailov S.A. , Tikhomirov V.A. ,   Ulyanovsk Civil Aviation Institute, Sharapov N.V. ,   Ulyanovsk Civil Aviation Institute, Evsevichev D.A. ,   Ulyanovsk Civil Aviation Institute, Samokhvalov M.K. ,   Ulyanovsk State Technical University
Published: October 2023

The article discusses the software with which it is possible to determine stressful situations by the voice of the aircraft crew based on the technology of neural networks. The analysis of the collected classified dataset and the results of the accuracy of the neural network was carried out.
TEST-BASED FATIGUE ANALYSIS WITH MACHINE LEARNING
Authors:   Ulyanovsk Civil Aviation Institute, Mukha I.A. , Buzaeva E.A. ,   Ulyanovsk Civil Aviation Institute, Bulatova A.E. ,   Ulyanovsk Civil Aviation Institute, Evsevichev D.A. ,   Ulyanovsk Civil Aviation Institute, Samokhvalov M.K. ,   Ulyanovsk State Technical University
Published: October 2023

The article discusses methods for studying the level of human fatigue and the possibility of determining the relationship between the results of computer testing and the state of fatigue based on the basic test. Fatigue analysis is carried out using machine learning
THE USE OF AUGMENTED REALITY IN THE SIMULATOR TRAINING OF PILOTS
Authors:   Ulyanovsk Civil Aviation Institute, Shakirov A.R. , Tauber A.N. ,   Ulyanovsk Civil Aviation Institute
Published: October 2023

A structure has been developed and a model of a technical device with the properties of an auxiliary projection display with augmented reality on board an airship for use in pilot training has been manufactured
Diminishing neuronal acidification by channelrhodopsins with low proton conduction
Authors: Hayward Rebecca Frank , Brooks F Phil , Yang Shang , Gao Shiqiang , Cohen Adam E
Published: October 2023

Many channelrhodopsins are permeable to protons. We found that in neurons, activation of a high-current channelrhodopsin, CheRiff, led to significant acidification, with faster acidification in the dendrites than in the soma. Experiments with patterned optogenetic stimulation in monolayers of HEK cells established that the acidification was due to proton transport through the opsin, rather than through other voltage-dependent channels. We identified and characterized two opsins which showed large photocurrents, but small proton permeability, PsCatCh2.0 and ChR2-3M. PsCatCh2.0 showed excellent response kinetics and was also spectrally compatible with simultaneous voltage imaging with QuasAr6a. Stimulation-evoked acidification is a possible source of disruptions to cell health in scientific and prospective therapeutic applications of optogenetics. Channelrhodopsins with low proton permeability are a promising strategy for avoiding these problems.
Evidence suggesting creatine as a new central neurotransmitter: presence in synaptic vesicles, release upon stimulation, effects on cortical neurons and uptake into synaptosomes and synaptic vesicles
Authors: Bian Xiling , Zhu Jiemin , Jia Xiaobo , Liang Wenjun , Yu Sihan , Li Zhiqiang , Zhang Wenxia , Rao Yi
Published: October 2023

The discovery of a new neurotransmitter, especially one in the central nervous system (CNS), is both important and difficult. We have been searching for new neurotransmitters for 12 years. We detected creatine (Cr) in synaptic vesicles (SVs), at a level lower than glutamate (Glu) and gamma-aminobutyric acid (GABA) but higher than acetylcholine (ACh) and 5-hydroxytryptamine (5-HT). SV Cr was reduced in mice lacking either arginine:glycine amidinotransferase (AGAT, a Cr synthetase) or SLC6A8, a Cr transporter with mutations among the most common causes of intellectual disability (ID) in men. Calcium-dependent release of Cr was detected after stimulation in brain slices. Cr release was reduced in SLC6A8 and AGAT mutants. Cr inhibited neocortical pyramidal neurons. SLC6A8 was necessary for Cr uptake into synaptosomes. Cr was found by us to be taken up into SVs in an ATP dependent manner. Our biochemical, chemical, genetic and electrophysiological results are consistent with the possibility of Cr as a neurotransmitter.Our novel approach to discover neurotransmitters is to begin with analysis of contents in SVs before defining their function and physiology.
Factors affecting the profitability of banks - Evidence from Serbia's banking sector
Authors: Đaković Miloš , Milenković Nada , Andrašić Jelena
Published: October 2023

Research Question: In the research, the authors investigate the effect of certain bank-specific, industry-specific, and macroeconomic factors on the profitability indicators of banks in the Republic of Serbia. The main question of the study is what factors have a relationship with profitability indicators and which of them has the most statistically significant impact. Motivation: Based on the research of (Fidanoski et al., 2018; Katusiime, 2021; Horobet et al., 2021), the authors intend to investigate the effects of certain factors on the profitability of the banking sector of the Republic of Serbia. The research should serve as a good indicator for banks to understand exactly which factors have the greatest impact on profitability. Idea: The essence of the research is precisely the discovery of the factors that have the most significant statistical effect on profitability indicators of banks, namely ROA (Return on assets), ROE (Return on equity), and NIM (Net interest margin). Data: The data includes a sample of 22 banks currently operating in the banking market of the Republic of Serbia. The research covers the period from 2014 to 2021 and includes a total of 174 observations. The dependent variables used are ROA, ROE, and NIM as representatives of bank profitability, while the independent variables are divided into three main units, bank-specific, industry-specific and macroeconomic factors. Tools: The research was carried out using the statistical software Eviews. The research includes the application of descriptive statistics and correlation methods. Further analysis includes the unit root test and the variance inflation factor analysis to check for stationarity and multicollinearity of the data. After testing, the authors establish a panel regression model using random and fixed effects, applying the Hausman test to establish a more valid model. Findings: Based on the performed analysis, we conclude that in the case of ROA and ROE, the variables that have the most significant influence on these indicators are liquidity indicator, the level of operating profit, capital adequacy, and loans. While liquidity, loans, and bank sector indicator such as HHI have the most significant effect on NIM. The study also showed that GDP annual growth does not have a statistically significant effect on profitability in the case of banks in the Republic of Serbia. Contribution: The paper contributes to the literature by empirically testing how certain factors affect the profitability of banks in the banking sector of the Republic of Serbia.