bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of extraction solvents on chemical profiling of Trailokya Vijaya Vati using GC-MS
Authors: Sharma Rahul , Kumar Shailendra
Published: April 2024

In India, Ayurveda is a substitute medicine system in the Indian subcontinent with historical roots. Trailokya Vijaya Vati is the most potent classical medicine for diseases pertaining to chronic pain, insomnia and anxiety. It is mainly prepared by the plants Cannabis sativa and Bambusa arundianacea. The present work is to determine the types of bioactive compounds present in different organic solvent extractions using GC-MS instruments. The GC-MS analysis of Trailokya Vijaya Vati has shown some promising compounds like Cannabidiol, Phytol, Cannabigerol, Campesterol, Humulene and Caryophyllene beside Cannabinol, Dronabinol and Delta-9-Tetrahydrocannabinol. This study shows significance of extracted bioactive compounds. Various types of bioactive molecules reported in Ayurvedic preparations (Trailokya Vijaya Vati) were obtained using different organic solvents. The pharmacological significance of bioactive compounds was also summarized from published literature. Further studies are needed to elucidate the effect of other parameters and interactions with other molecules to prove the importance of extraction procedure for Ayurvedic preparations.
Pengaruh Edukasi Perawatan Kaki Menggunakan Media Video Terhadap Perilaku Pencegahan Terjadinya Luka Diabetik pada Pasien Diabetes Militus
Authors: Apriani Desi , Saputra Bayu , Roslita Riau
Published: April 2024

Diabetes Melitus (DM) terjadi karena kadar gula dalam darah tinggi dapat menyebabkan timbulnya berbagai komplikasi. Komplikasi tahunan pasien DM di Indonesia adalah kaki diabetik sebesar 15%. Peran edukasi sangat penting untuk mencegah terjadinya risiko luka diabetik. Tujuan dari penelitian ini yaitu mengetahui pengaruh pemberian edukasi perawatan kaki dengan media video pada pencegahan luka diabetik pada penderita DM tipe 2. Desain  penelitian yang digunakan yaitu pre eksperimental dengan jenis One-group pretest-posttest design. Jumlah respondennya yaitu sebanyak 33 orang dengan teknik Probability Sampling. Instrumen penelitian ini adalah lembar kuesioner. Hasil analisa univariat yaitu didominasi oleh  responden perempuan, usia rata-rata 49,52 tahun, tingkat pendidikan  SMA (48,5%), serta pekerjaan IRT (51,5%). Perilaku responden sebelum dan sesudah dilakukan edukasi menggunakan video mengalami peningkatan yaitu  nilai mean pengetahuan dari 7,91 poin menjadi 9,97 poin, nilai mean sikap dari 29,67 poin menjadi 31,73 poin, dan nilai mean tindakan dari 6,30 poin menjadi 7,97poin. Hasil uji statistic menunjukkan ada pengaruh edukasi perawatan kaki pada perilaku pencegahan terjadinya luka diabetik pada penderita DM tipe 2 dengan nilai p-value 0,000. Penelitian ini menyarankan kepada Puskesmas Payung Sekaki supaya edukasi perawatan kaki dengan media video dapat diberikan kepada pasien DM.
Determinant Analysis of People with Mental Disorders (ODGJ) Re-hospitalization at Lampung Province Mental Hospital
Authors: David David , Setiaji Bambang , Djamil Achmad , Karyus Aila , Dewi Rahayu
Published: April 2024

The burden of disease in Indonesia from mental disorders is 13.4%. People with re-hospitalized mental disorders become a burden on the family, and the determinants of this behavior include age, gender, education, and work and family knowledge. The study aimed to analyze the determinants of rehospitalization at the Regional Psychiatric Hospital Lampung Province. Methods; This type of quantitative research with cross-sectional design. The family population of ODGJ. The research sample comprised 404 people who completed interviews with 5 informants. Data analysis used univariate, bivariate (chi-square) multivariate analysis (multiple logistic regression). Result; there was no relationship between age (p= 0.459), gender (p= 0.251), and occupation (p=0.191) with rehospitalization. Meanwhile, the education variable (p=0.018; OR=2.060) and family knowledge (p=0.000; OR=3.107) showed a significant relationship with rehospitalization. The results of multivariate analysis showed that the most dominant determinant of rehospitalization was family knowledge (p=0.000; OR=3.04) after controlling for education variables. Conclusions and Suggestions: Age, gender, and occupation are not determinants of rehospitalization while education and knowledge of the family are determinants of rehospitalization in the Lampung Provincial Hospital. This study suggests education about the benefits of re-hospitalization: Provide clear and comprehensive information to patients and their families about the benefits of re-hospitalization.
Features of book naming in classical and modern Russian literature
Authors: Dmitrieva T. P.
Published: April 2024

The title is the most important element of every book, it attracts the reader's attention and creates a first impression. The reader first pays attention to the title, so the title should be catchy, clearly convey the idea and content of the book. The purpose of the study is to identify and compare the characteristic features of book naming (titles) in classical and modern Russian literature. In the course of the work, the patterns of book naming, the opinions of famous scholars, and the classification of the titles of books of Russian classical literature were studied. The research method for classification was 84 titles of books from the classics. Further, to identify distinctive features, a classification of the titles of books of modern Russian literature was given. To confirm the idea 71 modern popular books were selected. The study uses the method of the situational analysis and the method of classification and generalization. The author comes to the main conclusion that classic writers approach book naming with special care, and modern authors use various experiments with book title techniques.
Valentin Rasputin's prose about creativity as an aesthetic manifesto of the writer
Authors: Imikhelova S. S.
Published: April 2024

The article reviews the prose by Valentin Rasputin, in which the writer expressed his aesthetic ideas about the nature of creativity. The short story “Down and upstream. Essay on a trip” (1972), and the short novels such as “"What to tell the crow” (1981), “Natasha” (1982), “Vision” (1997), “In bad weather” (2003) show the image of the artist in a situation of personal and creative self-reflection. In the image of the autobiographical hero-writer, Rasputin embodies the drama of the artist, overcoming the inconsistency of the rational and irrational sides of creativity. It is concluded that the laws of art and the mystery of creativity in the writer's prose are connected with unraveling the mystery of life and death, with comprehending the mystery of being. It is concluded that the plot of the artist’s self-reflection in the analyzed works acts as a kind of aesthetic manifesto of their author.
The problem of the correlation of individual and regional styles in the Tatar poetry of Bashkortostan
Authors: Fazlutdinov I. K.
Published: April 2024

The proposed article is devoted to identifying the main qualities of the regional style of Tatar poetry of Bashkortostan, through studying the features of the individual style of modern Tatar poets of the republic. The work provides a historical and literary analysis of the development of Tatar poetry in Bashkortostan in the twentieth century; the reasons for the emergence of such a literary phenomenon as “bilingual Tatar literature” are revealed, due, first of all, to changes in the socio-political and cultural life of the republic, the displacement of the Tatar language from the literary press and book publishing in the 1930s-1980s; the influence of these events on the individual style of poets is studied. Based on a

© Фазлутдинов И. К., 2024

qualitative scientific and theoretical basis, the author reveals the meaning and content of such literary terms as “style”, “individual style”, “regional style”; reveals the peculiarities of aesthetic perception and personification of the world in the works of the Tatar poets of Bashkortostan; emphasizes the importance of the artistic picture of the world as the main component of their individual style. Focusing on the diversity of opinions on the problem of the correlation of individual and regional styles in literary criticism, the author reviews scientific and literary discussions on the problems of form, content, creative method and the main motives of regional Tatar poetry. He comes to the conclusion that the Tatar poetry of Bashkortostan is inextricably linked with the traditions of the thousand-year-old Tatar literature and is currently its successor. Thus, the author enters into a polemic with scholars who consider the Tatar poetry of Bashkortostan as an independent literary phenomenon.
Analiza porównawcza mocy i sprawności układu kogeneracyjnego turbiny gazowej i parowej
Authors: Chinhenha A. , Mindykowski J.
Published: April 2024

Przedmiotem pracy są badania symulacyjne i analiza wybranych parametrów siłowni pracującej w obiegu gazowo-parowym. Celem pracy jest opracowanie metodyki oceny mocy i sprawności siłowni z turbinami pracującymi w obiegu gazowo-parowym
z wykorzystaniem autorskiego modelu analitycznego rozważanej instalacji. Uzyskane na podstawie przyjętego modelu szacunkowe wartości mocy i sprawności siłowni porównano
z wynikami uzyskanymi podczas testów odbiorczych przykładowej instalacji, przeprowadzonych przez jedno z wiodących konsorcjów, działających w obszarze systemów wytwarzania energii (SIEMENS AG. Power Generation Group).
Wpływ jednoczesnego występowania różnych zaburzeń jakości napięcia na temperaturę uzwojeń silnika indukcyjnego
Authors: Pepliński M.
Published: April 2024

Jednym z najczęściej występujących zaburzeń jakości napięcia są odchy­lenia wartości skutecznej oraz odkształcenia jego przebiegu, które zazwyczaj wiążą się
z obecnością wyższych harmonicznych. W niektórych systemach elektroenergetycznych, oprócz wyższych harmonicznych, występują również składowe subharmoniczne i interharmo­niczne. Ponadto w systemach morskich mogą wystąpić odchylenia częstotliwości. Obecność wyżej wymienionych zaburzeń powoduje dodatkowe straty mocy oraz wzrost obciążeń cieplnych silników indukcyjnych. W artykule przedstawiono wyniki badań wpływu długo­trwałych odchyleń wartości skutecznej i częstotliwości oraz składowych subharmonicznych na nagrzewanie silnika indukcyjnego małej mocy.
Ocena wpływu dodatku smakowego na liczebność populacji bakterii fermentacji mlekowej w wybranym środku spożywczym specjalnego przeznaczenia medycznego
Authors: Stankiewicz J. , Kwiatkowska E.
Published: April 2024

Celem badań była ocena wpływu dodatku smakowego na liczebność populacji bakterii fermentacji mlekowej w wybranym środku spożywczym specjalnego przeznaczenia medycznego. Przebadano łącznie 40 próbek, w tym 20 o smaku cytrynowym i 20 o smaku truskawkowym. W badanym materiale oznaczano ogólną liczbę bakterii mezofilnych tlenowych oraz liczebność populacji bakterii fermentacji mlekowej. Analizy mikrobiologiczne wykonywano tradycyjną metodą płytkową, w dwóch powtórzeniach. Badania wykonano w okresie od lutego 2016 do maja 2017 r. Próbki produktów o smaku truskawkowym charakteryzowały się nieznacznie wyższą liczebnością bakterii fermentacji mlekowej niż próbki o smaku cytrynowym. Ogólna liczna bakterii mezofilnych tlenowych w próbkach o smaku cytrynowym i truskawkowym osiągała zbliżone poziomy.
Ocena zawartości chlorku sodu w makrelach wędzonych zakupionych w sieciach handlowych
Authors: Kukułowicz A.
Published: April 2024

Makrele wędzone na gorąco charakteryzują się delikatnym i aromatycznym mięsem oraz stanowią cenne źródło składników odżywczych. Polska Norma dopuszcza w tych produktach zawartość soli kuchennej na poziomie 1,5-3%. Zgodnie z rekomendacjami Światowej Organizacji Zdrowia (WHO) zaleca się spożycie soli do 5 g dziennie na osobę, jednak większość ludzi spożywa jej zbyt dużo. Celem badań było oznaczenie zawartości chlorku sodu w makrelach wędzonych na gorąco, pochodzących od trzech różnych producentów. Zgodność z deklarowaną zawartością soli kuchennej stwierdzono w 15% ryb pochodzących od producenta A, w 16,7% produktów od producenta B oraz w 27,3% ryb pocho­dzących od producenta C. Wymagania PN-85/A-86772 dla ryb wędzonych pochodzących od producentów A, B i C spełniało odpowiednio: 70%, 41,7% i 40,1% badanych makreli [PN-A-86772:1985]. Ilość soli kuchennej, przekraczającą zalecany przez WHO dzienny limit tego składnika, zawierało 4,5% analizowanych ryb.
Ocena preferencji konsumenckich w zakresie wyboru sorbetów owocowych
Authors: Palka A. , Karczmarczyk P.
Published: April 2024

Przeprowadzono badania ankietowe na temat preferencji konsumenckich w stosunku do sorbetów owocowych. Badaniom poddano 120 osób, ankietę przeprowadzono w sposób internetowy. W wyniku przeprowadzonych badań stwierdzono, iż sorbety są stosunkowo rzadko spożywane przez badanych respondentów, a w przypadku ich konsumpcji ulubionym smakiem jest sorbet truskawkowy. Spośród badanych marek najpopularniejsza była marka Grycan.
Kształtowanie warstwy wierzchniej staliwa typu dupleks poprzez toczenie
Authors: Dyl T.
Published: April 2024

W pracy przedstawiono wyniki badań własnych toczenia staliwa typu dupleks w gatunku GX2CrNiMoCuN25-6-3-3. Celem badań było określenie geometrii ostrza i para­metrów technologicznych skrawania sprzyjających uzyskaniu chropowatości, będących w zakresie obróbki bardzo dokładnej, co pozwoli na osiągnięcie odpowiedniej jakości technologicznej powierzchni przedmiotu obrabianego. Po dokonanych badaniach ekspery­men­tal­nych ustalono występowanie zmniejszenia chropowatości przy zastosowaniu odpo­wiednich płytek skrawających. Obróbkę toczeniem staliwa typu dupleks zrealizowano przy zadanych parametrach technologicznych: posuw f = 0,1–0,2 mm/obr; głębokość skrawania ap = 0,5 mm, prędkość skrawania vc = 50–100 m/min. Toczenie wykończeniowe przepro­wadzono na tokarce uniwersalnej CDS 500x1000 dla różnych geometrii wymiennych płytek wieloostrzowych typu CCMT z węglików spiekanych pokrywanych powłokami CVD.
Wpływ zasilania silników okrętowych paliwem gazowym na wielkość projektowego współczynnika efektywności energetycznej EEDI na przykładzie wybranego kontenerowca
Authors: Giernalczyk M.
Published: April 2024

Celem artykułu jest zwrócenie uwagi na problem emisji do atmosfery przez statki morskie związków toksycznych, takich jak m.in. NOx, SOx, cząstki stałe oraz dwutlenek węgla. Załącznik VI Konwencji MARPOL o zapobieganiu zanieczyszczaniu powietrza przez statki wymusił na armatorach stosowanie rozwiązań zmierzających do ograniczenia emisji do atmosfery tych szkodliwych substancji. Jednym z instrumentów realizacji tych wytycz­nych jest wprowadzony dla nowo budowanych statków projektowy współczynnik efektyw­ności energetycznej EEDI. W artykule przedstawiono przykłady obliczeń tego współczynnika dla siłowni projektowanego kontenerowca w przypadku zasilania silników paliwem płynnym i gazowym LNG. Wskazano w ten sposób na istotny wpływ rodzaju spalanego paliwa na wielkość współczynnika.
Derating of an Induction Machine under Voltage and Frequency Deviation
Authors: Pepliński M.
Published: April 2024

One of the most frequently appearing power quality disturbances is voltage deviation. In addition in autonomic power systems, e.g. in ships, frequency deviation often occurs. It causes additional power losses and increase in thermal loads of induction machines. This paper deals with an effect of voltage and frequency deviation on derating.
Simulation Based Lectures for Students in Logistics
Authors: Bjorbæk C. T. , Berg Ø. , Schuett H. , Dushenko M.
Published: April 2024

Automation and digitalization in logistic processes nowadays increase the complexity of logistic systems (supply networks, terminals and warehouses) and leads to highly linked systems. Their dimensioning as well as start-up and optimization of operational processes require technical assistance today.
Simulation is used for understanding the behaviour of the seaport terminal and analysing the interaction of the complex processes at the terminal. This paper will show an investigation of the usage of specific port terminal simulator in the education of logisticians at university. It will show the effects of using simulation within the lessons in respect to the understanding of port operation and port simulation.
Traffic Rules and Environmental Conditions in Kattegat and the Sound Regarding Changes Planned for 2020
Authors: Kerbrat A.
Published: April 2024

This paper describes presently applied sailing rules and environmental conditions on Danish waters such as Kattegat and the Sund. Those rules were established in late 70’s of the twentieth century by Danish authorities as Denmark is a coastal country and has the legal right to do so. Presently International Maritime Organization – IMO is in the process of approving a new set of routeing measures and traffic separation schemes which should comply with resolution A.257(14) – General provisions on ships’ routeing, and will be introduced by Organization.
Analiza i ocena poprawności działania węzła tarcia w aspekcie II zasady termodynamiki
Authors: Bzura P.
Published: April 2024

W artykule przedstawiono autorską metodę sprawdzania poprawności działania węzła tarcia traktowanego jako układ tribologiczny w aspekcie II zasady termo­dynamiki na podstawie analizy i oceny wyników badań laboratoryjnych wykonanych na stanowisku badawczym. Jako stanowisko wykorzystany został zmodyfikowany węzeł tarcia aparatu czterokulowego T-02. Zaprezentowano algorytm, według którego zostały wykonane badania empiryczne. Wykazano, że wyniki badań potwierdziły przydatność metody określania entropii całkowitej węzła tarcia do analizy działania „szkodliwego”, umożliwiającej ocenę przydatności płynu smarującego do wytwarzania warstwy smarującej. Na podstawie analizy wyników sformułowano także hipotezę badawczą, z której wynika, że zmiana średniej entropii całkowitej węzła tarcia świadczy o zmianie działania węzła tarcia. Hipoteza ta została zweryfikowana na podstawie testu Anova z uwzględnieniem statystyki Fishera LSD.
Dodatkowe szkolenie mechaników okrętowych w przedsiębiorstwie żeglugowym zwiększające kompetencje do objęcia obowiązków zawodowych w siłowni okrętowej
Authors: Kamiński P.
Published: April 2024

W artykule zostały omówione ogólne założenia, cele oraz efekty działania programu szkoleniowego „BS Cadet Program”, jaki wprowadził jeden z większych niemieckich armatorów w celu poprawy wyszkolenia członków załóg na poziomie operacyjnym w dziale maszynowym, którzy dopiero będą obejmować obowiązki mechanika wachtowego w siłowni okrętowej. W pracy zawarto również porównanie wyników weryfikacji zdobytej wiedzy przez uczestników szkolenia z wynikami studentów Wydziału Mechanicznego po ostatnim roku nauki.
Ocena adekwatności modelu okrętowego tłokowego silnika spalinowego opracowanego na potrzeby badań diagnostycznych
Authors: Kniaziewicz T. , Zacharewicz M.
Published: April 2024

W artykule przedstawiono program prowadzenia badań zawierający podstawowe etapy, takie jak: obiekt rzeczywisty (zespół silnik – prądnica), modele: fizyczny oraz matematyczny procesów zachodzących w silniku, opracowanie programu komputerowego, prowadzenie badań modelowych oraz empirycznych dla silnika sprawnego i uszkodzonego oraz ocena adekwatności modelu. Następnie opisano wytypowane parametry wykorzystane do oceny adekwatności modelu w stosunku do silnika. W dalszej części przedstawiono plan badania dla silnika w dwóch stanach zdatności technicznej (silnik sprawny oraz silnik z wyłączonym zasilaniem paliwem cylindra nr 2). Końcowa część artykułu zawiera wyniki przeprowadzonych badań modelowych i empirycznych oraz ich analizę.
Wpływ konfiguracji instalacji transportu pneumatycznego paliwa stałego do kotła okrętowego na opory przepływu
Authors: Łuszczyński D. , Zeńczak W.
Published: April 2024

W artykule omówiono ogólne wymagania dotyczące pneumatycznej instalacji transportu paliwa stałego na statkach. Porównano trzy wybrane rozwiązania tych instalacji na trzech rodzajach statków. Zaprezentowano wybrane wyniki badań dla czterech różnych konfiguracji instalacji. Omówiono także wpływ zmiany konfiguracji instalacji w warunkach laboratoryjnych na spadki ciśnienia w rurociągu podczas transportu mieszaniny dwufazowej.
Analiza porównawcza produktów procesu pirolizy niskotemperaturowej wybranych tworzyw sztucznych w reaktorze niskociśnieniowym – badania wstępne
Authors: Tyliszczak M. , Lesnau A.
Published: April 2024

W artykule zaprezentowano analizę porównawczą wybranych produktów, powstałych w wyniku procesu pirolizy niskotemperaturowej dla wybranych odpadów z tworzyw sztucznych. Analizę wykonano dla dwóch różnych grup odpadów. Pierwsza dotyczyła odpadów HD-PE z grupy 2, natomiast druga stanowiła odpady zmieszane, tj. PP, PS, HD-PE, LD-PE oraz opakowania wielomateriałowe. Do wytworzenia badanych próbek wykorzystano reaktor niskociśnieniowy z bezpośrednim układem chłodzenia par węglowodorowych własnego projektu. Przedstawiona w artykule analiza wykazała przydatność produktów, takich jak gaz czy olej, powstałych w wyniku pirolizy niskotemperaturowej, oraz możliwość wykorzystania tej metody do utylizacji tych odpadów w sposób bezpieczny i przyjazny dla środowiska.
A Note on Treatment of Signals in Digital Signal Processing and in Network Calculus
Authors: Borys Andrzej
Published: April 2024

This short paper presents from the perspective of the operator theory some basic operations performed on signals in the digital signal processing as well as in the network calculus. These are the following operations: signal sampling, amplitude quantization, and signal recovery from its samples – in the digital signal processing. And regarding the network calculus, building up an auxiliary (continuous) traffic flow and recovery of a real traffic that possesses a non-continuous structure (with some granularity) after manipulations that were carried out with the use of a flow model are discussed in this paper. Some interesting results achieved and interpretations regarding the aforementioned stuff are presented.
Evaluation of Consumer Awareness of Hemp and its Applications in Different Industries
Authors: Borkowska Beata , Bialkowska Paulina
Published: April 2024

The purpose of the study was to evaluate consumer awareness of the medicinal properties of hemp and its applications in various industries. Before commencing the survey, the following research hypothesis was made: the survey respondents would lack basic knowledge about hemp. The study group of survey respondents consisted of 50 randomly selected people from the Pomeranian Voivodeship, Poland. The research tool was an original survey questionnaire containing 11 questions and a section for sociodemographic data. The survey study was conducted from October to December 2018. As a result of the study, the research hypothesis was positively verified. It was found that most members of the study group were unfamiliar with the term hemp, but still associated it positively. This was related to the erroneous attribution of its properties to Cannabis indica. More than half of the study group were unable to state whether the plant in question was used in medicine. The level of knowledge among the study group concerning the applications of hemp in various industries was low.
Preliminary Study of a 200-KW Induction Motor Supplied with Voltages Containing Subharmonics
Authors: Gnaciński Piotr , Klimczak Piotr
Published: April 2024

This work deals with the preliminary investigations of a 200-kW induction cage motor with a supply voltage featuring subharmonic injection. The results of the field calculations in the MAXWELL environment are presented for subharmonics of various frequencies. It was found that subharmonics occurring in real power systems can cause overheating and premature failure of this type of machine.
Surface Energy of Solids: Selection of Effective Substrates for Bioadhesion in Aqueous Media
Authors: Boniewicz-Szmyt Katarzyna , Pogorzelski Stanisław
Published: April 2024

Surface wettability of model solids of different hydrophobicity (from hydrophilic to hydrophobic) in contact with an aqueous medium was determined by measuring the dynamic contact angles (CA) using common techniques: sessile drop, inclined plate and captive bubble. The surface wettability energetics parameters: contact angle hysteresis (CAH), 2D adhesive layer pressure, surface free energy (SFE) and work values of cohesion, adhesion and spreading were determined using the formalism proposed by Chibowski [2003]. CA values depended on the technique used and experimental conditions (flow numbers, spatial heterogeneity and roughness of the sample). The most effective substrates for testing bioadhesion on solids submerged in aqueous media were hydrophilic surfaces (SFE ~ 40–58 mJ m-2; CAH ~ 16–20 mN m-1).
Perception of unconventional food by consumers in the age group of 50–60 years old
Authors: Steinka Izabela
Published: April 2024

The aim of the study was to assess the perception of unconventional food by respondents in the 50+ group. The research tool was a questionnaire developed by the first author that included questions about the definition of unconventional food, factors determining purchase and consumption, and identification of specific unconventional food products. Unconventional food involves products from a geographical range that is different from the climate zone where the consumers reside. The results from the survey indicated that respondents lacked adequate knowledge about unconventional food. Indeed, most female respondents also believed that unconventional food was a health hazard. Of note, the results indicated that men in the 50+ age group knew more about unconventional food than female respondents. Further research should focus on sources of knowledge about unconventional food and possible ways to encourage incorporation of these products into diet among the 50+ age group.
Assessment of the mcrobiological stability of marinated ginger stored in refrigerated conditions
Authors: Kukułowicz Anita , Siembida Patrycja
Published: April 2024

People use fresh, dried or marinated ginger in cooking, and some take it for their possible health benefits. Ginger may have anti-inflammatory, antibacterial, antiviral, and other healthful properties. Marinated ginger, mostly used for sushi on Polish market, is available in two variant forms: white and pink. Ginger is cut into thin slices, marinated in sweet and vinegar marinade and then undergoes thermal processing. The aim of the study was to assess the microbiological stability of marinated ginger. The best microbiological quality was characterized by ginger that had undergone a sterilization process. Although the initial number of lactic acid bacteria and fungi was the highest in ginger type C, the highest microbiological stability was also found in it.
Use of the waveguide technique to measure the electromagnetic parameters of materials
Authors: Budnarowska Magdalena , Mizeraczyk Jerzy
Published: April 2024

The paper presents and discusses selected simulation and measurement possibilities of an upgraded waveguide measuring stand for testing electromagnetic properties of selected materials (including metamaterials), based on the microwave propagation technique. The stand is equipped with the CST Studio Suite software, which enables modeling and simulation of broadly defined electromagnetic interactions, and the N1500A Materials Measurement Suite module for processing the results of measurements of electromagnetic properties of materials.
Transport of animals from the standpoint of the optimisation of meat quality and sustainable consumption
Authors: Zawadzki Mateusz , Kaizer Adam
Published: April 2024

The paper presents assumptions related to the implementation of sustainable development in logistics, which result from the need to protect the environment which is subject to systematic degradation. The concepts presented in this paper are aimed to both reduce the impact of negative factors on the environment and optimise transport costs.The paper also discusses the topics of sustainable consumption and meat quality. Attention was drawn to the problem of animal welfare contained in the so-called ’5 freedoms’. Information on meat defects is also included, as well as information on livestock skin injuries and transport-related animal mortality. As a result of an analysis of literature on this topic, it was found that transportation is still extremely stressful for animals despite advances in transportation technology. An analysis of the collected material led to the conclusion that meat quality depends on many factors, with transport being the critical point that drastically lowers its level.
Differences in the certification of DP Operator’s Certificates according to the Nautical Institute and DNV
Authors: Nowak Karol Aleksander
Published: April 2024

Over the last few years, there have been many novelties in the labour market in the offshore sector, which have resulted in a number of events and changes in the DPO (Dynamic Positioning Operator) certification. The following work is aimed at presenting and comparing the DNV (previously: DNV GL – Det Norske Veritas Germanischer Lloyd, the name changed on 1st of March 2021) competitive offer in relation to the still recent monopoly on the offshore market - Nautical Institute. Within the next few years, we can expect a significant strengthening on the market of the certification system offered by DNV, which is more dispersed, specialised and attractive both for shipowners and future DPOs.
Active filter for multi-pulse rectifiers with magnetically coupled reactor
Authors: Mysiak Piotr , Muc Adam
Published: April 2024

The article presents the simulation and laboratory tests of multi-pulse rectifiers with magnetically coupled reactors, connected to the power grid and cooperating with an active parallel filter (APF). In the study, two types of multi-pulse AC/DC rectifiers were compared, namely 12- and 24-pulse rectifiers. It presents the operating principle and the results of the simulation and laboratory tests. The considered systems enable the reduction of undesired high harmonics in the power supply grid current. For the manufacture of multi-pulse rectifiers, assemblies of magnetically coupled spring reactors configured in the TDSλ system were used.
Lifelong learning: the Dutch perspective on the role of simulators in Maritime Education and Training (MET)
Authors: Uitterhoeve Wendie , Van Leunen Gerrit
Published: April 2024

Over the past 25 years, the role of simulators has increased dramatically within Dutch Maritime Education and Training (MET) in parallel with new educational insights like competency-based learning. Research demonstrated that the learning efficiency for certain competences is higher in the simulator instead of that made during sea time. Relevant trends and developments that will affect MET in the future relate to maritime innovations, safety, simulator developments, human factors and didactic insights. Both sea time and simulator training contribute to the development of competencies, each having specific benefits and drawbacks. Within a balanced training program the optimal combination of on board experience, and simulator practice with online and offline learning, leads to an effective development of competences.
Analysis of the Batychron Research Project
Authors: Kosiek Julia , Nasur Jan , Rutkowski Grzegorz
Published: April 2024

The article presents the research project called ‘Batychron’. Batychron is a flexible underwater bell patented by the Gdynia Maritime University as a ‘device applicable in hydraulic engineering for underwater transport and diving with the safety of human life’ (patent number: PL192265 B1, Int. Cl B63C 7/12; B63C 11/44). Users of this device claim that the Batychron is the most revolutionary invention in the field of human activity underwater. Thanks to its advantages and low price, the Batychron may well become a device as common as the parachute in aviation in the future. The first prototype of the device was made in 2002. In 2021, after almost 20 years of using the Batychron in a marine environment, the Student Special Interest Group of Underwater Research “Sea Quest” operating at the Gdynia Maritime University decided to make a modified (improved) model of the device from modern materials (more durable) and prepare it for real sea trials. The main purpose of the article is to present the Batychron project construction and its application.
A Preliminary Study on Challenges Faced by Ship Management Companies during the COVID-19 Pandemic
Authors: Ertürk Egemen
Published: April 2024

The Covid-19 pandemic has had disruptive effects on many industries and the maritime industry is no different. Seafarers have been struggling with the restrictions brought about by the pandemic for almost two years now; however, ship management companies that employ them also face serious challenges. With that in mind, this study aims to identify the challenges and their extent. To achieve this aim, first the common challenges faced by seafarers and ship management companies were found through unstructured interviews with ship masters. This was followed by a questionnaire process carried out with the ship management companies, employing the emerging codes. The results show how crew change operations, lack of uniformity among the restrictions of different countries and lack of perceived involvement by international maritime organizations form part of the challenges faced by ship management companies during the pandemic.
Identification of the Environmental Impact of Polyurethane Foams Using Ansys Granta Selector
Authors: Piotrowska-Kirschling Agnieszka , Brzeska Joanna
Published: April 2024

Before a new polymer material is placed on the market, it should be compulsory to assess its environmental impact at different stages of its life cycle. The main objective of the study was to identify the environmental impact of the production of polyurethane (PUR) foams. Ansys Granta Selector software was used to analyze this aspect. The environmental characteristic of material production included: embodied energy [MJ/kg], CO2 footprint [kg/kg], and water usage [l/kg]. The Eco Audits of PUR foams, based on natural fillers, were investigated. The study showed that PURs generate significantly less CO2 at the production stage compared to other foams. Furthermore, the modification of PUR foams can reduce the CO2 footprint.
Food Waste from the Perspective of Assessment of Attitudes and Behaviours of Young Consumers
Authors: Radzymińska Monika , Platta Anna
Published: April 2024

The subject of wasting food, as it relates to the reduction of losses and waste, holds an important place in European Union and United Nations agendas. Constant monitoring of the causes of this phenomenon among consumers is very useful in its prevention. It enables modifying and properly targeting educational campaigns and shaping social norms. The aim of this study was to examine the attitudes and behaviours of young consumers in relation to wasting food. The study was conducted in 2021–2022 among young consumers studying at universities (n = 507), using the indirect on-line survey measurement method. The results demonstrated that planning rational purchases helps limit food waste in this consumer group. Young consumers carefully purchase products, which may be a consequence of limited budgets. The study has shown that before making purchases, the majority always check their current food supplies, try to limit food waste in their household and try not to throw away any foodstuff. Additionally, the study has shown that a major part of the them know and apply various methods of using leftover food to prepare simple, multi-ingredient dishes. The results presented in this paper may indicate that the wastage-related educational campaigns conducted in Poland are effective.
Consumer Understanding of the ‘Best Before’ and ‘Use by’ Dates
Authors: Samotyja Urszula
Published: April 2024

The aim of the study was to evaluate the consumers’ knowledge of the concept of ‘best before’ and ‘use by’ dates, and to assess how it translates into safe and sustainable food-handling behavior in relation to a specific food and a given date type. The face-to-face interview method (N = 1145) was applied with the use of the interview questionnaire. The results showed that groups of 61.1% and 79.0% of Polish consumers who selected the correct meaning of the date had problems with food handling when they were asked about a specific food product. Consumer behavior in this regard depended on the type of product, not on the date type.
Multi-criterion Analysis of Selected Power Management Strategies in Smart Home Systems
Authors: Listewnik Karol , Formela Piotr
Published: April 2024

The introduction of renewable energy sources (RES) and modern building automation solutions, known as smart homes, has greatly increased building energy efficiency. The number of smart home solutions and their elements in closed and open systems continues to grow. This paper attempts to present the energy management abilities in KNX smart home systems based on two different strategies applied to two model houses. Solutions based on a cost-effective strategy and solutions based on a comfort strategy were selected for a multi-criterion analysis based on an electric energy balance in selected buildings, economic analysis and analysis of the selected solutions in terms of user comfort. Finally, a comparative analysis was performed for the results of the multi-criterion analysis of smart home systems combined with RES for two selected buildings.
Implementing the Blowers-Masel Approximation to Scale Activation Energy Based on Reaction Enthalpy in Mean-field Micro-kinetic Modeling for Catalytic Methane Partial Oxidation
Authors: Xu Chao , Mazeau Emily , West Richard
Published: April 2024

Mean-field micro-kinetic modeling is a powerful tool for catalyst design and the simulation of catalytic processes. The reaction enthalpies in a micro-kinetic model often need to be adjusted when changing species’ binding energies to model different catalysts, when performing thermodynamic sensitivity analyses, and when fitting experimental data. When altering reaction enthalpies, the activation energies should also be reasonably altered, to ensure realistic reaction rates. The Blowers-Masel approximation (BMA) relates the reaction barrier to the reaction enthalpy. Unlike the Brønsted-Evans-Polani (BEP) relationship, the BMA requires less data because only one parameter, the intrinsic activation energy, needs to be determined. We validate this application of BMA relations to model surface reactions by comparing against density functional theory (DFT) data taken from literature. By incorporating the BMA rate description into the open-source Cantera software we enable a new workflow, demonstrated herein, allowing rapid screening of catalysts using linear scaling relationships (LSRs) and BMA kinetics within the process simulation software. For demonstration purposes, a catalyst screening for catalytic methane partial oxidation (CMPO) on 81 hypothetical metals is conducted. We compare the results with and without BMA-corrected rates. The heat maps of various descriptors (e.g. CH4 conversion, syngas yield) show that using BMA rates instead of Arrhenius rates (with constant activation energies) changes which metals are most active. Heat maps of sensitivity analyses can help identify which reactions or species are most influential in shaping the descriptor map patterns. Our findings indicate that while using BMA-adjusted rates didn't markedly affect the most sensitive reactions, it did change the most influential species.
Development of a Novel Solid State Organic Fluorophore: Excited-State Aromatization-Induced Structural Planarization
Authors: Pace Domenic , Crocker Reece , Kendrick William , Zhang Bolong , Wong Wallace , Khanh Mai Binh , Schmidt Timothy , Nguyen Thanh Vinh
Published: April 2024

Solid-state emission is pivotal for the functionality of organic compounds in opto-electronic applications. Yet, tailoring the emission characteristics of existing solid-state emissive organic frameworks is a challenging task, primarily due to their intricate structure-activity interplay. In this study, we introduce an innovative family of solid-state luminogens, centered around the dibenzosuberenylidene core. These luminogens are characterized by a remarkable excited-state aromatization-induced structural planarization (ESAISP) behaviour. This unique feature allows for the modulation of their fluorescence properties, including color and intensity, through simple structural alterations, opening new avenues in the development of organic advanced functional materials.
Photoredox-Catalyzed Amidyl Radical Insertion to Bicyclo[1.1.0]butanes
Authors: Glorius Frank , Chintawar Chetan , Laskar Ranjini , Rana Debanjan , Schäfer Felix , van Wyngaerden Nele , Dutta Subhabrata , Daniliuc Constantin
Published: April 2024

Heteroaromatic rings play a prominent role in medicinal chemistry, featuring in numerous biologically relevant molecules. However, unlike benzene ring the saturated and structurally rigid bioisosteric mimetics of heteroaromatic rings are rarely known, mainly due to the inherent challenges associated with the stability and synthesis of heteroatom-substituted C(sp3)-rich polycyclic hydrocarbons. We envisioned that the strategic and highly selective insertion of different heteroatomic units to bicyclo[1.1.0]butanes (BCBs) could offer an ideal platform to access diverse heterobicyclo[n.1.1]alkanes. Herein, by circumventing the intrinsic challenges associated with the reaction of BCBs with heteroatomic radicals, we report a photoredox-catalyzed highly regio- and chemoselective insertion of amidyl radicals to BCBs, which provided direct access to 2-oxa-4-azabicyclo[3.1.1]hept-3-enes. Detailed experimental and computational studies have been carried out to underpin the mechanistic paradigm of this reaction. The newly synthesized heterobicyclic motifs are structurally rigid and exhibit well-defined exit vectors, the two important molecular properties in medicinal chemistry. Moreover, various downstream transformations were carried out with these compounds, highlighting their utility as versatile building blocks in synthetic chemistry.
Preparation of Neptunyl and Plutonyl Acetates to Access Non-Aqueous Transuranium Coordination Chemistry
Authors: Mikeska Emily , Wilson Richard , Sen Asmita , Autschbach Jochen , Blakemore James
Published: April 2024

Uranyl diacetate dihydrate is a useful reagent for the preparation of uranyl coordination complexes, as it is a well-defined stoichiometric compound featuring moderately basic acetates that can facilitate protonolysis reactivity, unlike other anions commonly used in synthetic actinide chemistry such as halides or nitrate. Despite these attractive features, analogous neptunium (Np) and plutonium (Pu) compounds are unknown to date. Here, a modular synthetic route is reported for accessing stoichiometric neptunyl(VI) and plutonyl(VI) diacetate compounds that can serve as starting materials for transuranic coordination chemistry. The new neptunyl and plutonyl complexes, as well as a corresponding molecular uranyl complex, are isomorphous in the solid state, and in solution show similar solubility properties that facilitate their use in synthesis. In both solid and solution state, the +VI oxidation state (O.S.) is maintained, as demonstrated by vibrational and optical spectroscopy, confirming that acetate anions can stabilize the oxidizing, high-valent +VI states of Np and Pu as they do for the relatively more stable U(VI). All three acetate salts react smoothly with a model diprotic ligand, affording incorporation of U(VI), Np(VI), and Pu(VI) cores into molecular coordination compounds that occurs concomitantly with elimination of acetic acid; the new complexes are high-valent, yet overall charge neutral, facilitating entry into non-aqueous chemistry by rational synthesis. Joint computational studies reveal that the dianionic ligand framework assists in stabilizing the +VI O.S. through strong sigma donation to the 5f shells of the actinides, highlighting the potential usefulness of protonolysis reactivity toward preparation of stabilized high-valent transuranic species.
UTILIZATION OF SATELLITE GRAVITY ANOMALY DATA FOR TWO-DIMENSIONAL MODELING OF SUBSURFACE STRUCTURE OF SLAMET VOLCANO, CENTRAL JAVA, INDONESIA
Authors: hah Se , Prabowo Urip Nurwijayanto , Raharjo Sukmaji Anom , Kurniati Resti
Published: April 2024

Study using the satellite gravity method has been carried out in the Slamet Volcano area, Central Java, Indonesia. The gravimetric satellite has produced gravity anomalies data which have been corrected up to free air correction. This study purposes to determine the subsurface structure of Slamet Volcano by modeling residual gravity anomalies data. Data processing which has been conducted includes bouguer correction, terrain correction, data reduction to a horizontal surface, separation of regional and residual anomalies data, modeling, and interpretation. The residual gravity anomalies data obtained from the processing range from -40.62 – 66.22 mGal. The anomalies data are modeled in two dimensions (2D) to obtain the subsurface structure model of Slamet Volcano. The 2D-subsurface models on the AB and CD trajectories show the presence of magma chamber and several lava rocks which form the body of the volcano. The rocks are interpreted as andesitic lava with a density value of 2.72 g/cm3, andesitic-basaltic lava with a density value of 2.89 g/cm3, basaltic lava with a density value of 2.97 g/cm3, and magma chamber with a density value of 1.32 g/cm3. Such low value of magma chamber density relative to the surrounding rocks, indicates that Slamet Volcano is still active.