bluuebunny/crossref_metadata_2025 huggingface dataset:
INFLUENCE OF PROCESSING RED CURRANT BERRIES ON TECHNOLOGICAL PROPERTIES OF BAKERY RAW MATERIALS
Authors: ЛАЗАРЕВА Т.Н. , МУРЛЕНКОВ Н.В. , БЕРЕЗИНА Н.А. , КИРЕЕВА О.С. , ЯРКИНА М.В.
Published: April 2024

Вторичные ресурсы сокового производства, образующиеся при переработке ягод, можно вносить как добав- ки в различные продукты питания, что позволит повысить их пищевую ценность и даст возможность безотходного ис- пользования пищевых сельскохозяйственных ресурсов. Исследовано влияние порошка из выжимок красной смородины (ПВКС) на технологические свойства пшеничной хлебопекарной муки высшего сорта (МПХ) – количество и качество сы- рой клейковины и число падения. Было сформировано 4 группы образцов: 1 (контроль) – МПХ; 2, 3, 4 – смесь МПХ и ПВКС в соотношении 95 : 5; 90 : 10; 85 : 15 соответственно. Количественный и качественный состав образцов исследовали в со- ответствии с ГОСТ 27839–2013, ГОСТ Р 54478–2011, ГОСТ 27676–88 при использовании измерителя деформации клей- ковины и прибора для определения числа падения. Для математической обработки полученных данных и установления зависимостей применяли статистические методы обработки: T-тест Стьюдента (Tst), дисперсионный анализ (F), корре- ляционный анализ (R), регрессионный анализ (R2). Получены зависимости влияния добавки порошка из выжимок крас- ной смородины на технологические свойства МПХ, которые должны быть учтены при корректировке технологического процесса производства продуктов питания из растительного сырья при внесении в рецептурный состав данной добавки.

The secondary resources of juice production formed during the processing of berries can be added as additives to various food products, which will increase their nutritional value and enable the waste-free use of food agricultural resources. The effect of red currant pomace powder (RCPP) on the technological properties of premium wheat baking flour (WBF) – the quantity and quality of raw gluten and the falling number – has been studied. 4 groups of samples were formed: 1 (control) – WBF; 2, 3, 4 – a mixture of WBF and RCPP in the ratio 95 : 5; 90 : 10; 85 : 15 accordingly. The quantitative and qualitative composition of the samples was studied in accordance with GOST 27839–2013, GOST R 54478–2011, GOST 27676–88 using a gluten deformation meter and a device for determining the falling number. Statistical processing methods were used to mathematically process the data obtained and establish dependencies: T-test (Tst), ANOVA (F), correlation analysis (R), regression analysis (R2). The dependences of the effect of the additive of red currant pomace powder on the technological properties of WBF, which should be taken into account when adjusting the technological process of food production from vegetable raw materials when adding this additive to the formulation, are obtained.
DEVELOPMENT OF A METHOD FOR INCREASING THE EFFICIENCY OF GRINDING AGRICULTURAL RAW MATERIALS
Authors: КЕРИМОВ М.А. , БЕЛИНСКАЯ И.В.
Published: April 2024

Диспергирование сельскохозяйственного сырья представляет собой сложный технологический процесс. В большинстве случаев процессы измельчения достигли естественного предела скорости, и дальнейшее повышение эффективности их функционирования на существующей технологической платформе представляется трудноразре- шимой задачей. В связи с этим актуальны разработки новых концептуальных решений и методик, базирующихся на информационно-энергетических принципах. Разработана модель функционирования измельчителя дезинтеграторно- го типа, содержащего цилиндрический корпус, внутри которого расположены два вращающихся в противоположных направлениях ротора в виде дисков с ударными элементами. Представлена методика проведения поисковых экспери- ментов, позволяющая изучать преобразования в глубоких слоях веществ и микроэлементов. Предложенные схемотех- нические решения обеспечивают возможность управления качеством функционирования технологического процесса с учетом физико-механических, биологических и химических свойств исходного сырья. По разработанной методике получена обогащенная калием и фосфором порошкообразная кормовая добавка для сельскохозяйственных животных «Кедрослав» с дисперсностью 0,01–0,02 мм и относительным содержанием углеводов 68,4%. Результаты исследования в контрольной группе животных до и после проведения опытов свидетельствуют о положительном эффекте применения.

Dispersing agricultural raw materials is a complex technological process. In most cases, comminution processes have reached a natural speed limit, and further improving their efficiency on the existing technology platform appears to be a difficult task. In this regard, the development of new conceptual solutions and techniques based on information and energy principles is relevant. A model has been developed for the functioning of a disintegrator-type shredder containing a cylindrical body, inside of which there are two rotors rotating in opposite directions in the form of disks with impact elements. A methodology for conducting search experiments is presented that allows one to study transformations in deep layers of substances and microelements. The proposed circuit solutions provide the ability to control the quality of the technological process, taking into account the physical, mechanical, biological and chemical properties of the feedstock. Using the developed method, a powdered feed additive for farm animals «Kedroslav» enriched with potassium and phosphorus was obtained with a dispersion of 0,01–0,02 mm and a relative carbohydrate content of 68,4%. The results of the study in the control group of animals before and after the experiments indicate a positive effect of use.
Description of Selected Hazardous Issues During Operating the Power Grid with the Insulated Neutral Point
Authors: Nowak T.
Published: April 2024

Artykuł dotyczy analizy parametrów występujących w sieciach okrętowych trójfazowych z izolowanym punktem neutralnym. Przedstawia zagrożenia porażeniowe występujące podczas eksploatacji sieci elektroenergetycznej typu IT powszechnie stosowanych na statkach morskich.
Wpływ farmy wiatrowej na obciążalność napowietrznej linii WN
Authors: Kostyszyn R. , Szwarczewski P.
Published: April 2024

Artykuł przedstawia analizę możliwości zwiększenia obciążalności napo­wietrznej linii 110 kV w związku z podłączeniem farmy wiatrowej. Celem analizy było powiązanie wpływu prędkości wiatru na moc generowaną farmy wiatrowej oraz zjawisko chłodzenia przewodów fazowych linii napowietrznej. Na przykładzie istniejącej linii 110 kV zbadano skalę wpływu prędkości wiatru na wzrost jej obciążalności w porównaniu z możliwościami generowania energii elektrycznej przez farmę wiatrową. Wskazano na różne możliwości zwiększenia przepustowości linii. Wyniki przeprowadzonej analizy pozwa­lają postawić tezę, że w wielu przypadkach dopuszczalne jest przyłączenie farmy wiatrowej do napowietrznej linii przesyłowo-dystrybucyjnej bez konieczności zwiększania jej para­metrów związanych z przepustowością.
Effects of Household Washing on the Reduction of Microbiological Contamination of Minimally Processed Vegetables
Authors: Kukułowicz A.
Published: April 2024

Fresh vegetables are highly recommended in any diet, virtually without quantitative restriction. The consumption of minimally processed vegetables has increased in recent years, among others due to their convenience and health benefits. However, these products are also a great base for the growth of pathogenic micro-organisms. The aim of this study was to assess the impact of the household washing of minimally processed salads on the reduction of their microbial contamination. Used in this study double 30-second washing of salads under running water has resulted in reduction of the number of Staphylococcus aureus by about
1 logarithmic cycle, whereas Escherichia coli were not found in those products.
Analiza diet niskoenergetycznych i niskoglikemicznych zamieszczonych na stronach internetowych
Authors: Kozirok W.
Published: April 2024

Ostatnio obserwuje się dużą popularność portali omawiających różne modele postępowań dietetycznych. Celem pracy była analiza i ocena zgodności z zaleceniami czterech diet niskoenergetycznych i czterech niskoglikemicznych, zamieszczonych na stronach internetowych. Analizowany materiał obejmował jadłospisy opracowane na siedem dni. Oceną objęto podaż energii i wybranych składników odżywczych, warunkujących prawidłowe funkcjonowanie organizmu człowieka. Przeprowadzone badania wskazały na niską ich jakość. Większość analizowanych diet charakteryzowała się nieprawidłowym zbilansowaniem kluczowych dla zdrowia składników odżywczych i nie spełniała wymagań obowiązujących norm żywienia. Z powodu niskiej wartości odżywczej diet proponowanych przez portale internetowe ich stosowanie może przyczynić się do wystąpienia poważnych skutków zdrowotnych. Należy zwrócić uwagę na potrzebę upowszechniania rzetelnej wiedzy i edukacji w tym zakresie.
Review of Methods and Algorithms for Modelling Transportation Networks Based on Graph Theory
Authors: Guze S.
Published: April 2024

One of the best ways of modelling a transport network is to use a graph with vertices and edges. They represent nodes and arcs of such network respectively. Graph theory gives dozens of parameters or characteristics, including a connectivity, spanning trees or the different types of domination number and problems related to it. The main aim of the paper is to show graph theory methods and algorithms helpful in modelling and optimization of a transportation network. Firstly, the descriptions of basic notations in graph theory are introduced. Next, the concepts of domination, bondage number, edge-subdivision and their implementations to the transportation network description and modeling are proposed. Moreover, the algorithms for finding spanning tree or maximal flow in networks are presented. Finally, the possible usage of distinguishing concepts to exemplary transportation network is shown. The conclusions and future directions of work are presented at the end of the paper.
Wybrane rozwiązania indywidualnego sprzętu ratunkowego na polskich katamaranach regatowych o długości do 15 metrów
Authors: Krajewska P.
Published: April 2024

W artykule zaproponowano wyposażenie ratunkowe polskich jednostek regatowych – katamaranów pod kątem szans na przeżycie rozbitka w wodzie podczas prowadzenia aktywnych poszukiwań. Wybrane rozwiązania przedstawiono na podstawie akcji ratowniczej nr 071/SAR/2017, przeprowadzonej przez Morską Służbę Poszukiwania i Ratownictwa.
Analiza działania Morskiej Stacji Referencyjnej w Świnoujściu jako podstawa do stworzenia morskich systemów IDS (Instrument Docking System)
Authors: Pietraszkiewicz J. , Tycholiz W.
Published: April 2024

W artykule opisano fazy podchodzenia statku do portu ze szczególnym uwzględnieniem problemu wyznaczania pozycji jednostki z dużą dokładnością w czasie rzeczywistym. W tym aspekcie przeprowadzona została analiza systemów pozycjonowania, ich dokładności, dostępności, niezawodności oraz zasięgu działania. W artykule przedstawiono wyniki badań obserwacji dokładności systemu pozycjonowania w Świnoujściu, przeprowadzonych przez zespół NavSim Polska Sp. z o.o. Podkreślając wykorzystanie techniki RTK (Real Time Kinematic), przeprowadzono analizę działania Morskiej Stacji Referencyjnej (MSR) w Świnoujściu. Artykuł prezentuje możliwe praktyczne wykorzystanie technologii GNSS RTK (Global Navigation Satellite Systems) do budowy systemów elektronicznego zobrazowania rzeczywistej sytuacji nawigacyjnej dużej jednostki oraz wdrożenia na wzór systemów lotniczych ILS (Instrument Landing System) lub GBAS (Ground Based Augmentation System) morskich systemów IDS (Instrument Docking System). Przedstawione wnioski uzasadniają przydatność MSR w Świnoujściu oraz stosowanie podobnych systemów w celu zwiększenia bezpieczeństwa podczas wprowadzania statków do portu.
Wpływ wzrostu dawki paliwa na zmiany amplitud składowych harmonicznych drgań skrętnych wału zespołu spalinowo-elektrycznego
Authors: Drewing S. , Dereszewski M.
Published: April 2024

Artykuł przedstawia wyniki badań wpływu zmian dawki paliwa na składowe harmoniczne drgań skrętnych wału zespołu spalinowo-elektrycznego, ze szczególnym uwzględnieniem składowej harmonicznej odzwierciedlającej wtrysk paliwa. W badaniach wykorzystano metodę pomiaru drgań skrętnych wału za pomocą zmian chwilowych prędkości kątowych.
Metoda wyznaczania stałej czasowej termopary na podstawie pomiaru szybkozmiennej temperatury spalin wylotowych silnika o ZS
Authors: Puzdrowska P.
Published: April 2024

W niniejszym artykule przedstawiono problematykę wyznaczania stałej czasowej termopary. Wskazano na wagę właściwości dynamicznych termopar podczas eksperymentów. Przedstawiono stanowisko laboratoryjne, na którym przeprowadzono badania, mające na celu wyznaczenie stałych czasowych dwóch rodzajów termopar. Zaprezentowano trzy metody obliczania tego parametru. Określono wartość stałej czasowej, wyznaczonej metodą symulacji numerycznej wymiany ciepła między spoiną termopary a spalinami ją otaczającymi, przy założeniu wolnozmienności procesu, czyli przejścia z jednego stanu ustalonego do drugiego. W kolejnym kroku obliczono ten parametr również dla takiego przejścia, jednak dokonano tego na podstawie rzeczywistej szybkozmiennej temperatury spalin, zarejestrowanej podczas badania na stanowisku laboratoryjnym. Jako trzecią metodę przedstawiono określanie wartości stałej czasowej dla warunków chwilowych, dla szybkozmiennej temperatury rejestrowanej podczas eksperymentu, dla przebiegu pseudo­okresowego w obrębie trwania jednego cyklu roboczego silnika. Dokonano porównania i oceny uzyskanych wyników obliczeń, a co za tym idzie, użyteczności metody wyznaczania stałej czasowej termopar.
Progress of Work on e-navigation and the Modernisation of GMDSS
Authors: Korcz Karol
Published: April 2024

The article presents the progress of work on the e-navigation project carried out by the International Maritime Organization (IMO). Progress of the work on the second project carried out by the IMO is also described, related to e-navigation and involving modernization of the Global Maritime Distress and Safety System (GMDSS). In addition to the description of these projects, their mutual relationship is also presented, as well as the timetable for implementing their stages.
Optimization strategies of container terminals
Authors: Kuznetsov Alexander L. , Kirichenko Alexander V. , Semenov Anton D. , Borevich Albert Z.
Published: April 2024

One of the main tasks of operational management of modern container terminals is effective utilization of existing technological resources. The search for possible variants of terminal activity optimization requires constant analysis of transport process technology and development of technical and technological approaches to increase the effectiveness of resources utilization. One of the possible solutions provided by terminal operational systems is the application of different strategies of container stack organization and container selectivity. At the same time, the complicated character of input and output container flow makes the effectiveness of these strategies doubtful. The paper states that this particular manner of container service is different from traditional ones, i.e. FIFO and FILO. As output container flow is randomly distributed the manner of container service can be considered as First In/Random Out. The paper also considers different strategies that are applied in practice and analyzes its influence on the productivity of handling equipment. The results of these strategies simulation modeling are represented. The results prove that no strategy can provide a productivity with theoretical selectivity; any strategy provides slowed intensity of operations. At the same time, it is proved that the only optimization strategy which increases the productivity of handling equipment is the organization of terminal activity whereby containers can be selected from the stack not in requirement sequence, but in order of its position in a stack.
Problems of carnotisation of steam turbine circuits
Authors: Krzyślak Piotr
Published: April 2024

The paper presents new concepts related to improvement of the efficiency of thermal circuits of steam turbines. Starting from a traditional C-R system, the efficiency losses of the circuit depending on the number of heat recovery exchangers in the system were indicated. Three different types of heat recovery regeneration exchangers that can be used in thermal circuits and their impact on the efficiency of the steam turbine system are presented. Further in the paper, the concept of the internal superheating and the possibilities of increasing efficiency in its use are presented.
Remarks on the working conditions in the region of Polish Polar Hornsund Station
Authors: Winnicki Adam , Wilkowski Bartosz M. , Hryciuk Sonia , Tyrpiał Kamil , Żywiec Hubert
Published: April 2024

The Polish Polar Station in Hornsund is a scientific base of great importance. In 2020, students of Gdynia Maritime University were able to visit the station and prepare photographic documentation of its surroundings. This article includes historical basics compared with the latest research concerning the flora, fauna, meteorology and studies on the Hansbreen glacier, research programme conducted on the station and climate changes in the Spitsbergen and perspective for the future fate of the Svalbard Archipelago.
Single-Phase Induction Motor Under Voltage Fluctuations
Authors: Pepliński Marcin , Adamczak Daniel , Gnaciński Piotr
Published: April 2024

Some of the most common power quality disturbances are voltage fluctuations. They are interconnected with the presence of voltage subharmonics and interharmonics. Voltage fluctuations, subharmonics and interharmonics exert a negative effect on various elements of a power system, including cage induction motors. This work is devoted to the impact of voltage fluctuations on the current of a one-phase induction motor. The results of empirical investigations are presented for sinusoidal amplitude modulations of various frequencies and are compared with the effects of voltage subharmonics occurring as a single power quality disturbance.
Potensi Bahaya dan Resiko Peledakan Terhadap Keselamatan dan Kesehatan Kerja pada Karyawan PT Trimitra Batu Berkah Desa Sempalai Kabupaten Sambas
Authors: Nabila Puteri Asha , Mukhtar Wahdaniah , Aprillia Ricka
Published: April 2024

They were blasting at PT. Trimitra Batu Berkah has potential hazards and risks of work accidents due to workers who neglect to use Personal Protective Equipment (PPE), the environment, and unsafe actions. The company has not considered some things such as the completeness of PPE, the provision of drinking water, and the rest period of blasting workers, so an occupational safety and health (K3) management study is needed. The purpose of this study is to identify potential hazards and risks of explosions and recommend control of blasting risks to occupational health safety in employees of PT. Trimitra Blessing Stone Desa Sempalai Kabupaten Sambas. Solving this research problem uses the Job Hazard Analysis method, collecting blasting activity data, identifying potential hazards and risks, analyzing the assessment and risk level of blasting activity, and recommending risk control. The results of the study identified 37 potential hazards and 51 risks in blasting activities, a substantial level of 67% with 34 risks, a priority 3 risk level of 23% with 12 risks, a very high-risk level of 4% with 2 risks, an acceptable risk level of 4% with 2 risks and a priority 1 risk level of 2% with 1 risk. Risk control recommendations were identified as elimination by 5% with 3 controls, substitution by 3% with 2 controls, Engineering by 16% with 10 controls, administration by 28% with 17 controls, and personal protective equipment by 48% with 29 controls.
Desalinasi Air Laut Menggunakan Metode Reverse Osmosis (Ro) Dengan Variasi Tekanan Pompa
Authors: Yhavez Dendi Dicky , Danial M Meddy , Lestari Arfena Deah
Published: April 2024

Air merupakan kebutuhan utama manusia dalam aktivitas sehari-hari. Air laut (air asin) yang berlimpah di sekeliling masyarakat pesisir sulit untuk dimanfaatkan secara langsung karena mengandung garam mineral yang tinggi. Agar dapat digunakan, maka air tersebut harus didesalinasi sehingga layak. Salah satu metode untuk desalinasi adalah Reverse Osmosis (RO). Tujuan penelitian ini untuk mengetahui proses dan tingkat efektivitas metode RO dengan variasi tekanan pompa. Pengujian sampel dilakukan dengan pengujian kadar TDS, pH, salinitas, Fe, dan Mangan. Analisis data yang digunakan berupa analisis analitik dengan 2 variasi tekanan pompa yaitu Single Pump dan Double Pump. Hasil analisis menunjukkan bahwa proses desalinasi menggunakan metode RO memiliki 4 proses. Proses tersebut antara lain pre-treatment, pemberian tekanan, separasi membran dan stabilisasi. Pengolahan menggunakan metode RO pada variasi tekanan Single Pump dengan membran tipe BW (Brackish Water) memiliki nilai efektivitas penurunan parameter salinitas dan TDS sebesar 35,00%, dan 28,89%, sementara pada membran tipe SW (Saline Water) sebesar 95,00%, dan 69,01%. Selanjutnya pengolahan RO pada variasi tekanan Double Pump dengan membran tipe BW memiliki nilai efektivitas penurunan parameter salinitas dan TDS sebesar 35,00% dan 22,09%, sementara pada membran tipe SW sebesar 95,00% dan 72,21%.
Kinetika Adsorpsi Logam Timbal (Pb) Menggunakan Ampas Tebu dan Gambas Kering pada Air Sumur Gali Sekitar TPA Batu Layang
Authors: Agustin Dela Tri , Apriani Isna , Winardi Winardi
Published: April 2024

The dug well water around Batu Layang landfill contains heavy metals, namely lead (Pb) and iron (Fe). This study aims to determine the adsorption kinetics model of each activated carbon. Heavy metal sorption uses activated carbon made from bagasse (AT), dried gambas (GK), and a combination (ATGK). The research method used jar tests with mass variations of 1 g, 2 g, 3 g and contact times of 30 and 60 minutes. Activation of activated carbon using 0.5 M HCl solution for 24 hours. Kinetics analysis is based on first-order and second-order kinetics. Langmuir, Freundlich, and BET adsorption equations are used in the adsorption process. The results showed that the adsorption kinetics of Pb metal for AT and GK activated carbons followed the second order while ATGK followed the first order. The adsorption equation for Pb metal for AT and GK activated carbon follows the Freundlich isotherm and ATGK activated carbon follows the BET isotherm. This research is important to see the potential of activated carbon made from AT and GK to be effective in adsorbing heavy metals.
Evaluasi Kondisi Eksisting Instalasi Pengolahan Lindi (IPL) Tempat Pemrosesan Akhir Sampah (TPAS) Sorat Kecamatan Sambas Kabupaten Sambas
Authors: Dhea Silva Priska , Arifin Arifin , Sulastri Aini
Published: April 2024

Tempat Pemrosesan Akhir Sampah (TPAS) Sorat yang terletak di Kecamatan Sambas dengan sistem pengelolaan controlled landfill memiliki Instalasi Pengolahan Lindi (IPL). Hasil pengolahan air lindi pada IPL TPAS Sorat belum memenuhi standar baku mutu menurut Peraturan Menteri Lingkungan Hidup dan Kehutanan Nomor P.59/Menlhk/Setjen/Kum.1/7/2016 dikarenakan pengolahan pada unit bak biofilter aerob tidak berfungsi dengan baik. Tujuan penelitian ini adalah untuk mengidentifikasi karakteristik air lindi TPAS Sorat yang kemudian merekomendasikan sistem pengolahan yang cocok sebagai pengganti dari bak biofilter aerob. Parameter yang diuji pada bagian inlet dan outlet pada bak biofilter aerob yaitu pH dengan nilai 8,01 dan 7,80, TSS 12,8 dan 121, BOD 244 dan 291, COD 998 dan 1.039, Timbal (Pb) <0,093 dan <0,093, Kadmium <0,038 dan <0,038. Perhitungan debit air lindi menggunakan intensitas hujan yang dihitung dengan menggunakan model rumus monobe yang menghasilkan debit air lindi sebesar 91,324 m3/hari. Rekomendasi yang diberikan yaitu unit pengolahan bak fakultatif atau bak aerasi dengan besar volume 92 m2 dengan waktu tinggal 6,45 hari dan biaya yang diperlukan Rp 340.874.204,-, sedangkan pada bak aerasi memiliki besar volume 6 m3 dengan waktu tinggal 9 hari dan biaya yang diperlukan Rp 85.769.127,-. Dengan dilakukan evaluasi pada IPL TPAS Sorat diberikan alternatif pengolahan fakultatif atau aerasi agar dapat menurunkan parameter yang telah melewati standar baku mutu.
Daftar Isi
Authors: Engineering Environmental
Published: April 2024

Daftar Isi
Photoelectric properties of composite materials based on ultrathin porphyrin-based 2D lanthanide MOF nanosheets grown on TiO2 nanowire arrays through epitaxial growth
Authors: Wang BING , Zhang Yuqing
Published: April 2024

Ultrathin Two-dimensional (2D) metal-organic framework (MOF) nanosheets have attracted the attention of researchers because of large specific surface area, and TiO2 nanowire arrays based on semiconductor materials can utilize solar energy and have broad application prospects in the energy and environmental fields. In this paper, needle-shaped TiO2 (n type) nanowire arrays are synthesized through the optimization and control of reaction conditions, and stable TiO2 nanowire arrays are obtained with a diameter of about 10-20 nm and a length of about 4-5 μm. In addition, through the improvement of solvothermal synthesis, 2D ultrathin Eu-TCPP MOF nanosheets (p type) are synthesized, with a thickness of 1.25 nm and ultrathin nanosheets with an area of more than 20 μm2. Through the compounding of the two materials, a new composite material (TiO2@Eu-TCPP nanowire arrays) was obtained, and the Photoelectric properties are 140 times higher than the original two materials, response time is within 2s, due to the semiconductor p-n heterojunction effect.
Antisolvent controls the shape and size of anisotropic lead halide perovskite nanocrystals
Authors: Frank Kilian , Henke Nina A. , Lampe Carola , Lorenzen Tizian , März Benjamin , Sun Xiao , Haas Sylvio , Gutowski Olof , Dippel Ann-Christin , Mayer Veronika , Müller-Caspary Knut , Urban Alexander S. , Nickel Bert
Published: April 2024

Colloidal lead halide perovskite nanocrystals hold enormous potential for lighting applications due to their outstanding optical properties. Precise control of the nanocrystal dimensions and composition is a prerequisite for establishing practical applications. However, the rapid nature of their synthesis precludes a detailed understanding of the synthetic pathways, thereby limiting the optimization. Here, we deduce the formation mechanisms of anisotropic lead halide perovskite nanocrystals, 1D nanorods and 2D nanoplatelets, by combining in situ X-ray scattering and photoluminescence spectroscopy. In both cases, emissive prolate nanoclusters form upon mixing of the two precursor solutions. The divergent anisotropy is induced by ensuing antisolvent addition: The intermediate nanoclusters are driven into a dense hexagonal mesophase, where they fuse to form nanorods. Contrastingly, nanoplatelets grow freely dispersed from dissolving nanoclusters, stacking subsequently in lamellar superstructures. Shape and size control of the nanocrystals are determined primarily by the antisolvent's dipole moment and Hansen hydrogen bonding parameter. Exploiting the interplay of antisolvent and organic ligands could enable more complex nanocrystal geometries in the future.
SEDIMENT CHARTERSTICS, ORGANIC CARBON AND CALCIUM CARBONATE IN CORE SEDIMENTS OF KRISHNA RIVER DELTA, EAST COAST OF INDIA
Authors: Krishna K. N. Murali
Published: April 2024

The present study is an attempt to understand sediment charterstics and distribution of organic carbon and calcium carbonate in four cores viz. Turumella, Inturu, Ponnapalli and Nizampatnam of the Krishna River delta. Grain size data indicates that the sediments in the study area are dominantly composed of sandy clay and silty clay. The average organic carbon in Turumella (1.69%), Ponnapalli (1.55%), Nizmpatnam (1.18%) and Inturu (1.14%). Organic matter controlled by vegetative roots and quick sedimentation and CaCO3 persentage related to institu authegenic shell fragments. Semi arid environmental conditions and pedogenic processes for long time exposure of mud flats and flood plains before deposition of other sediments on it. Organic carbon in plants and soil undergo the primary degradation process driven by bacterial and fungal action, which alters their molecular composition before their input into riverine environment. The organic carbon (OC) is often a good index for deciphering depositional environment. It plays a major role in controlling the redox potential of the sediments constituting the source material for petroleum. The first time in the Krishna River delta, where in shallow drilling was carried out upto the 160m depth undisturbed samples have been used for the purpose.
GROUNDWATER EXPLORATION FOR WATER WELL SITES IN ABATA ASUNKERE COMMUNITY, ILORIN, NIGERIA
Authors: K.O. Suleman , O.L. Ogunmola , R.O. Adesina , T.O. Adeoye , L.A Sunmonu
Published: April 2024

In this study, Electrical resistivity investigation was carried out at different sections of Abata Asunkere Community, Ilorin, Nigeria with the aim of evaluating groundwater potential and properties of the aquifers. Geophysical technique adopted in this work were the Vertical Electrical Sounding (VES) and 2-D Electrical Resistivity Tomography (ERT) using Schlumberger array configuration. ERT was established on two profiles at the study area with total distance of 80 m apart with 5 m electrode spacing. Eight (8) VES points were sounded along the established profiles. The results revealed four geo-electric layers which correspond to the topsoil, clayey layer, sandy clay and the last layer to the bedrock in all the VES points sounded. The topsoil has apparent resistivity values ranging from 5 to 437 Ω-m and 0.5 m to 1.7 m while the last layer which is the fractured/fresh basement rock has resistivity ranges of 27 Ω-m to 9800 Ω-m and is characterized by infinite thickness. The curve types obtained are H, QH and HK curve type signatures with the H curve type covering about 60 % of the study area. High potential for groundwater was observed at the northeastern and southern part of the study area. Aquifers in most part of the study areas are relatively shielded from contamination because of high protective capacity of the overburden material. It was hence concluded that, the study area has a promising groundwater potential. Based on these results, groundwater exploration at optimum yield was recommended. Depending on the volume of water available during drilling, the maximum depth of drilling may reach up to 60 m.
APPRAISAL OF THE ABAJI-ABUJA (NIGERIA) ML 2.25 EARTH-TREMOR OF 10th JANUARY 2020
Authors: C. Amadi Chukwunweike , D. Uko Etim , O. Ofoegbu Charles , A. Adekunle Adepelumi , S. Ayanninuola Olatunji
Published: April 2024

This research aims at determining the epicentre, magnitude and energy dissipated during the earth-tremor which took place at Abaji-Abuja (Nigeria) on 10th January 2020 at 13:46:20 UTC. The event was recorded by Volksmeter II VMII-2RU broadband Seismographs located at the Earthquake and Space Weather laboratory, Obafemi Awolowo University, Ife, Osun state, Nigeria. The computed P-wave and S-wave arrival times and lag times were 35.8seconds, 36.1seconds and 33.3seconds recorded by three Seismographs Ife (1), Ife (2) and Ife (3) respectively. The WinQuake software was used for the analysis. Epicentre distances computed were 330.3 km, 333.5 km and 303.2 km from the three seismograms, using trilateration method. The results gave the epicentre location at 8049’N and 6047’E (Gurdi town, Yaba District, Abaji LGA, Abuja, Nigeria),focal depth of 5 km, and average epicentral distance of 322.3km from Ile-Ife. The tremor has a Local Magnitude of 2.25 MLand Coda Magnitude of 3.7Md, and the dissipated energy of 149.6 × 10-12 KJ. The implication of these results is that a local magnitude of 2.25 ML of 149.6 × 10-12KJ of energy serves as an indicator to the future occurrence of another earthquake within the said region. Necessary precautionary measures should be taken when carrying out geological and construction works within the Abaji-Abuja environs. The massive rock blasting and quarrying must have reactivated the faults within the area.
FLOOD DAMAGE MITIGATION AND RESILIENCE IN BANGLADESH PERSPECTIVE
Authors: Billah Md. Masum
Published: April 2024

The northeastern part of Bangladesh is facing more diverse problems such as more frequent and severe floods, sea level rise, saltiness water, and loss of biodiversity due to poor management of flooding systems. This article investigates that about 55% ,60% & 50% area was sequentially inundated in A.D. 1988, A.D. 1998 and A.D.2007. These 3 floods were historically more horrible than any other catastrophic flood. In A.D. 2007 flooding made 9 million people homeless and roughly 1000 people died. However, due to institutional limitations, mismanagement and social conflicts, applications of the flood mitigation plan and water management approaches were not implemented. With every major flood in Bangladesh, water security and poverty situations are adversely affected. Heavy monsoon rain and water from upstream sources have triggered drainage levels occasionally considered the main causes of flood in Bangladesh. But this article explores that the main causes of flood of Bangladesh are lack of river beds mining, lack of stabilizing trees, dam, and lack of bank revetment both sides of the river. According to the field data, in Bangladesh there are only 35% of flood protected zone. On the contrary, there are 52% of flood unprotected area. This article analyzed flood hazard in Bangladesh and try to make nature-based solutions for mitigating this vulnerability.
USING ALTERATION PATTERNS TO CHARACTERIZE GOLD MINERALIZATION AT MAGNETIC HINGE IN CHIRANO GOLD MINES LIMITED: APPLICATION OF ANALYTICAL SPECTRAL DEVICE
Authors: Wilson Matthew Coffie , Quaye Dinah Wankyimah , Agyemang Kweku Ofori , Apau Daniel
Published: April 2024

The Magnetic Hinge deposits from Chirano Gold Mine lie within the Paleoproterozoic Birimian rocks of southwestern Ghana on the West Africa Craton. The Analytical Spectral Device (ASD) Terraspec Spectrometer is used to measure the composition and abundance of a variety of alteration minerals. The results obtained through the ASD on rock cores are plotted as strip logs plots, box plots and the creation of geological models using Leap Frog Geo. The different alterations identified using the ASD were sericite, chlorite, carbonate, amphibole, chlorite-amphibole, kaolinite and epidote. Cutoff grades lesser than 0.2 ppm were considered insignificant mineralization and hence were of no interest. The Magnetic Hinge boasts of carbonate, sericite, and sericite-chlorite alterations hosting good gold grades in rocks and this was observed from the results obtained. Moreover, Magnetic Hinge is a new project and reverse circulation was done to obtain information on the subsurface alterations, open pit mining may be done and as progress is made, diamond drilling can be done to obtain subsurface information for much deeper depth.
EVIDENCE OF POST-CRYSTALLIZATION DUCTILE DEFORMATION IN PLUTONIC CHARNOCKITES AROUND IKARE, SOUTHWESTERN, NIGERIA
Authors: Alaba Oyeshomo Anthony Victor
Published: April 2024

Charnockites could be of magmatic, metamorphic, or metasomatic origin and formed in varying tectonic settings. Lack of detailed geological mapping of plutonic charnockites around Ikare necessitated this work. Hence, this study was designed to investigate the petrography of plutonic charnockites, in order to infer post-cystallization event that prevailed in the area. Ten (10) chip rock samples purposively collected were prepared into thin and polished sections for petrographic studies using petrological microscope. The mineral assemblages observed are quartz, plagioclase feldspar, alkali feldspar, horhblende, biotite, orthopyroxene ± clinopyroxene. The accessory minerals are apatite, magnetite, ilmenite and zircon. Anti-perthite and myrmekite intergrowth are common. BSE images show close association between alkali feldspar and barium suggesting that barium is replacing potassium in the feldspar. Also,hornblende are found enclosing orthopyroxene suggesting a retrograde event. Relicts of quartz and alkali feldspars are found in biotite grain suggesting partial melting of the rock under high temperature conditions. Based on petrographic evidence, the charnockite magma that produced these charnockites must have been emplaced at deep crustal level under granulite facies conditions and followed by strong ductile deformation.
ESTIMATION OF SHALLOW WATER BATHYMETRY ALONG THE NORTHERN COAST OF BAY OF BENGAL: A REMOTE SENSING-BASED APPROACH
Authors: Hasan Md. Abid , Fayyaz Rafid , Rahman Mahfujur , Hasan Mahmudul , Islam Md. Atikul , Shreya Shamiha Shafinaz
Published: April 2024

Bathymetric information is vital for navigational safety and is utilized for many more activities. Remote sensing data and satellite images are widely used these days to determine shallow coastal areas’ bathymetry at a low cost. This study reviewed different methods for satellite-derived bathymetry and selected the ratio transform method to apply to Landsat 8 imagery. Two images covered the northern coastal region of the Bay of Bengal. They were processed using a ratio-based algorithm calibrated with reference data. A hydrographic chart from the Bangladesh Navy depicted a general overview of the study area. Another chart from the BIWTA, along with GEBCO gridded bathymetry data, was used as reference data for the study. The ArcGIS and ENVI image processing software was used to process and analyze satellite imagery. The correlation between the satellite-derived bathymetry and reference data was also studied at the end of the study. The mean absolute deviation, mean squared error, and root mean square error were also evaluated. Both algorithms were able to extract bathymetry up to a depth of 12 meters with minimal errors. Satellite Derived Bathymetry (SDB) from the Central Coast resulted in an R-squared value of 0.82 with a Mean Absolute Deviation (MAD) of 0.89. SDB from the Western Coast had R2 of 0.81 and MAD of 1.16. After interpolating the algorithm results, contour lines were also generated to visualize the bathymetry. The deviations and irregularities in the contours resulted due to the high turbidity of the coastal waters of the Bay of Bengal.
AQUIFER SYSTEMS CHARACTERIZATION FOR GROUNDWATER MANAGEMENT IN ILE-OLUJI, SOUTHWESTERN NIGERIA, USING MCDA GIS-BASED AHP
Authors: Falowo O.O. , Akindureni Y. , Babalola O.C.
Published: April 2024

Multicriteria decision analysis for groundwater potential mapping utilizing analytical hierarchical process of six hydrogeologic parameters including aquifer layer thickness, aquifer layer resistivity, overburden thickness, transverse resistance, transmissivity, and coefficient of anisotropy; in relation to groundwater yield was carried out in Ile Oluji, Southwestern Nigeria. The aim was to develop groundwater potential map using calculated groundwater potential index values (GWPIV). The obtained GWPIV which ranged from 1.53 (granite) – 3.50 (migmatite) with an average of 2.18 suggestive of moderate groundwater potential (90 % of the study area). The low potential zone (10 %) are observed sporadically in the central and northwestern parts. All the geological units recorded overlapping hydrogeologic properties. The longitudinal unit conductance recorded regional average of 0.219876 mhos. Therefore the protective capacity of groundwater system in the study area is weak, and relatively less-weaker in granite environment; and in northwestern and central parts. Nevertheless, the water table aquifer (accounts for 80%) and the fracture basement (constitutes 20%, frequently occurring in gneissic environment) are the water bearing units, with average overburden thickness in migmatite, granite, and gneiss 24.3 m, 24.5 m, and 27.9 m respectively. The average coefficient of anisotropy (1.12); hydraulic conductivity (0.37 m/d), transmissivity 6.86 m2/d (migmatite: 7.17 m2/d, granite: 7.14 m2/d, and gneiss: 6.02 m2/d). Hence gneissic offered both thick weathered layer and fractured aquifer. Empirical model for plot of formation factor and hydraulic conductivity in migmatite, granite, and gneiss, showed positive correlations in descending order as: granite (0.3778), migmatite (0.1057), and gneiss (0.0641).
Changes in quality parameters and bioactive components of seedless lime fruit
(Citrus latifolia) during cold storage
Authors: Huynh T.D. , Kha C.T. , Nguyen V.A.
Published: April 2024

The postharvest maintenance quality of fruits is significant for industrial applications. The
present study was conducted to evaluate of quality parameters and bioactive components
of seedless lime (Citrus latifolia) fruit during cold storage. Lime fruits were packed in
perforated polyethylene bags, which were then put into a perforated expanded polystyrene
box, and stored in a cool chamber, at 10°C. Quality parameters including skin color,
weight loss, total soluble solids (TSS), juice percentage, technological index, titratable
acidity (TTA), reducing and total sugars of the fruits were measured during 56 days of
storage. The total phenolic content of the juices was measured using a colorimetric
method of Folin-Ciocalteu. Ascorbic acid and major flavonoids of the fruits such as
hesperidin and eriocitrin were quantified using HPLC-PDA methods. The results showed
that cold storage kept the greenness of the fruit’s skin for up to 28 days. A minor weight
loss (< 5%) was also recorded in the first 28 days of storage. The technological index of
the fruits, reducing total sugars and TSS slightly increased, whereas TA somewhat
decreased. Bioactive components such as phenolic and ascorbic acid contents were kept
stable (p>0.05) in the first 21 days of storage but considerably reduced after 28 days of
storage. A decrease in hesperidin and eriocitrin was also recorded from 21 days of storage
but at a lower rate compared to that of phenolic and ascorbic acid contents. Altogether, a
simple, convenient cold storage method using a perforated polyethylene bag and expanded
polystyrene box can retain the quality and bioactive components of lime fruits for at least
21 days. The findings are significant for the food industrial application of storage lime
fruits for fresh utilization or juice processing.
Sociodemographic characteristics, knowledge and practice of personal hygiene with anemia incidence in adolescent girls
Authors: Pertiwi Dian , Apriningsih Apriningsih , Wahyuningtyas Widayani , Makkiyah Feda Anisah
Published: April 2024

Anemia is a serious global public health problem and affects the community especially in developing countries. The purpose of this study is to analyze the relationship between sociodemographic characteristics, knowledge and practice of personal hygiene with anemia incidence in adolescent girls in Sirnagalih Village, Jonggol, Bogor Regency. The research method used was observational analytic using quantitative data with cross sectional design. Respondents of this study were 78 adolescent girls with purposive sampling technique and according to the inclusion and exclusion criteria. The data was collected by test of hemoglobin levels and filling out a questionnaire with the google form. Based on the results of data analysis independent and dependent variables using the fisher exact test, age obtained p = 0,023, education obtained p = 0,058, knowledge of personal hygiene obtained p = 0,008, and practice of personal hygiene has p value = 0,045. The conclusion of this study, there is no relationship between education with anemia incidence. However, there is a relationship between variables of age, knowledge and practice of personal hygiene with anemia incidence in adolescent girls in Sirnagalih Village, Jonggol, Bogor Regency.
Side effect of using N95 mask on oxygen saturation, respiration rate and pulse rate of health workers in Jakarta
Authors: Wulandari Shenda Maulina , Rahmawati Apriana , Rohmah Ulfa Nur , Pertiwi Harizza
Published: April 2024

The new normal era brings people new habits, one of which is wearing masks. The particulate respirator N95 mask (N95 mask) is the mask with the highest filtration, but there are some complaints regarding its use, one of which is difficulty breathing. Therefore, this study aims to determine whether there is an effect of using an N95 mask on oxygen saturation (SpO2), respiratory rate (RR) and pulse rate (PR). This study uses a convenience sampling technique with a sample size of 60 respondents. The research design used was a quasi-experimental design with a one-group pre and post-test design. Data analysis used the Wilcoxon test with p <0.0001, which means that there are differences in the results of SpO2, RR, and PR before and after using the N95 mask. Suggestions for health workers and policymakers in Indonesia to be able to apply the maximum hours of using N95 masks so that health workers avoid illness, disability, or discomfort which can maintain optimal performance.
Experience in testing content analysis in the study of the concept of «Russian idea»
Authors: Khamidulin A. M. , Babaeva A. V.
Published: April 2024

Introduction. The article is devoted to the problem of the formulation of the substantive aspect of the Russian idea. The relevance of the text is determined by the fact that there is still no adequate understanding in the research literature of what should be included in the content of the concept. Moreover, the very existence of the Russian Idea is a problem area for the Russian philosophical tradition.

Materials and Methods. The authors test an original approach to the study of the phenomenon, which consists in the application of quantitative tools to the study of the deep meanings of Russian civilization. The collection of material was carried out on the basis of 26 texts of the representatives of the national thought of different historical epochs and various ideological positions. The basic idea behind the research was the thesis that the Russian idea is a meta-narrative with a 1000-year history, in this regard, the hypothesis was put forward that none of the existing texts can be considered as exhaustive and fully reflecting the concept of the work. On this basis, the authors of the article analyzed all the source texts as separate chapters of a single narrative about the fate of Russian civilization and its role in the world historical process.

Results. The data presented in the article were collected and processed using online resources: https://miratext.ru and https://istio.com/. The similarity of the algorithms of the resources, however, gave different results. As a result of automatic and manual viewing, the top 20 high-frequency and relevant words were formed for each of the sources, the categories were systematized and presented in a tabular version and a word cloud format. It was revealed that, although the analyzed texts are united by a single theme «Russian Idea», no single concept has been found that would be common to all the analyzed sources. The most frequent concepts should be noted as the following: «man», «Russian», «Russia», «life» and «people». These words, according to both programs, were in the top of the combined semantic core of all 26 sources. The study showed that these concepts are unifying for all the texts considered.

Discussion and Conclusions. The presented results demonstrate the prospects of using quantitative methods that allow us to search for mathematical confirmation of the correctness of the semantic content of the Russian idea.