bluuebunny/crossref_metadata_2025 huggingface dataset:
VALIDATION OF THE METHOD OF SPECTROPHOTOMETRIC QUANTITATIVE DETERMINATION OF THE TOTAL FLAVONOID CONTENT IN CAMPANULA SAXIFRAGA SUBSP. AUCHERI (A.DC.) OGAN.
Authors:   Azerbaijan Medical University, Department of Pharmacognosy, Baku, Azerbaijan, Safarova Nilufar , Isayev Javanshir ,   Azerbaijan Medical University, Department of Pharmacognosy, Baku, Azerbaijan
Published: February 2023

In recent years, wild plants of different families have been widely used in medical practice. Campanulaceae is one these families. The Campanulaceace family includes six genera in Azerbaijan. The genus Campanula is richer in the number of species. Campanula saxifraga subsp. aucheri (A.DC.) Ogan. is one of the species of this genus that arouses interest. The plant C. saxifraga subsp. aucheri (A.DC.) Ogan. was collected for research in August 2022, from an alpine meadow at an altitude of 3200 m above sea level, in the Goygol district of the Or-dubad region of the Nakhchivan Autonomous Republic.The amount of flavonoids in the air part of the plant in comparison with rutin was calculated to be 2,93% by the spectrophotometric method, which was validated ac-cording to certain parameters. The conducted study gives grounds to believe that in the future C. saxifraga subsp. aucheri will expand the range of medicinal plant materials containing flavonoids.
Proses Komunikasi dan Manajemen Humas UIN Mataram dalam Menguatkan Branding Kampus
Authors: Kurniawan Andri , Rosyada Ibqesya A. , Salsabila Syarifa , Hidayati Bq Siti
Published: February 2023

Keberadaan Hubungan Masyarakat (Humas) di suatu Institusi atau perusahaan sangatlah vital termasuk dalam membangun brand maupun citra internal (corporate image). Banyak lembaga yang mengalami permasalahan internal maupun eksternal bahkan sampai mengakibatkan ‘gulung tikar’ atau kebangkrutan. Salah satu penyebabnya adalah komunikasi yang kurang romantis dan tata kelola yang tidak terencana dengan baik. Penelitian ini bertujuan untuk mengetahui tahap komunikasi dan manajemen yang dilakukan oleh Humas UIN Mataram dalam membangun brand dan citra. Melalui metode kualitatif dengan pendekatan fenomenologi, data dipaparkan secara natural sesuai fakta lapangan. Adapun hasil penelitian bahwa meminjam teori Cutlip, Center dan Broom kami membaca tahapan komunikasi dan manajemen yang dilakukan melalui empat tahap yaitu pertama, defining problems melalui penyerapan saran dari berbagai pihak sebagai bentuk assessment. Kedua, tahap planning and programming yang dilakukan adalah pemilihan duta dan membangun relasi. Ketiga, taking action and communicating adalah komunikasi dan sosialisasi prestasi maupun kegiatan kampus melalui berbagai platform media sosial. keempat, Evaluating yang dilakukan sekali setahun pada akhir tahun akademik.
Efektivitas Pembelajaran Berbasis Daring dalam Pandangan Siswa di Dusun Sebero Desa Dalegan Panceng Gresik
Authors: Sa’idaturrohmah Nur , Khofifah Lailatul
Published: February 2023

The purpose of this study was to conduct learning effectiveness in Sebero hamlet by using online or online. The subjects in the journal are research and the web that discuss online-based learning. The scope of this journal covers school teachers and elementary school children, as well as the role of government in pursuing online learning today. The development of this education is very influential with the success of an information with good communication. And technology that plays a role in today's environment and education is also used for online learning, online learning is useful for information and communication between students connecting with the internet which is usually done forever. This online media uses various research subjects such as WhatsApp, Google Classroom, Edmodo, and other websites. The method we use is to interview several students in Sebero Village.
МЕТОДИ УПРАВЛІННЯ КАДРОВОЮ ПОЛІТИКОЮ ПІДПРИЄМСТВА
Authors:   Вінницький соціально-економічний інститут університету «Україна», Балахонова Олеся , Пірняк Аміна ,   Вінницький соціально-економічний інститут університету «Україна»
Published: February 2023

У статті досліджено основні функції кінцевої мети кадрової політики на підприємствах. Зазначено, що одним з важливих етапів реалізації обраної системи управління кадровою політикою є практичне здійснення набору необхідних підприємству категорій працівників. Наведені зовнішні та внутрішні джерела набору працівників до підприємства. Система управління кадровою політикою створюється на основі перспективного плану розвитку підприємства, що складається з трьох положень: виробничого, фінансово-економічного, соціального. Кадрова політика являється інструментом управління персоналом, низкою основних принципів та завдань, які здійснюються відділом кадрів на підприємстві. Запропоновані варіанти управління кадровою політикою підприємства. зазначено, що при виборі методів управління кадровою політикою використовуються фактори, що властиві зовнішньому та внутрішньому середовищу підприємства. Перелічені основні властивості управління кадровою політикою підприємства. Наведені основні завдання та цілі управління кадровою політикою підприємства.
СУТНІСТЬ ТА ЗМІСТ УПРАВЛІННЯ ЗОВНІШНЬОЕКОНОМІЧНОЮ ДІЯЛЬНІСТЮ
Authors:   Вінницький соціально-економічний інститут університету «Україна», Швед Вадим , Матяш Олег ,   Вінницький соціально-економічний інститут університету «Україна»
Published: February 2023

В статті досліджено сутність та зміст зовнішньоекономічної діяльності, через призму видів такої діяльності та принципів здійснення. Окрема увага приділена функціям зовнішньоекономічної діяльності. Проаналізовано сутність управління зовнішньоекономічною діяльністю, зокрема шляхом вивчення функціонального наповнення такого управління. Вивчено зміст методів управління зовнішньоекономічною діяльністю
СУТНІСТЬ МЕТОДІВ УПРАВЛІННЯ ЯК ОСНОВА ЕФЕКТИВНОГО УПРАВЛІННЯ ПІДПРИЄМСТВОМ
Authors:   Вінницький соціально-економічний інститут університету «Україна», Швед Вадим , Парчевська Тетяна ,   Вінницький соціально-економічний інститут університету «Україна»
Published: February 2023

В статті розглядається сутність методів управління, в першу чергу через ретроспективний аналіз становлення теорій менеджменту. Проводиться аналіз взаємозв’язку методів управління в системі теорії управління. Наводиться наповненість методів управління через зміст, спрямованість та форму.
ОСНОВНІ ПРИНЦИПИ ТА ЗАВДАННЯ СОЦІАЛЬНОГО ЗАХИСТУ НАСЕЛЕННЯ
Authors:   Вінницький соціально-економічний інститут університету «Україна», Давиденко Ганна , Балахонова Олеся ,   Вінницький соціально-економічний інститут університету «Україна»
Published: February 2023

Досліджено, що стан продуктивних ринкових відносин за своїми діями здійснює вирішального впливу не тільки на економічний розвиток країни, але й на функціонування соціальної сфери. Система соціального захисту нашої держави, насамперед взаємопов’язана із станом розвитку економічно-фінансової галузі, процес функціонування якої спрямований на забезпечення задоволення нагальних потреб населення, у поєднанні із підвищенням рівня та якості його соціального захисту. Виконання діяльності установами соціального захисту населення здійснюється за умов дотримання відповідних принципів, поєднання яких утворює належно продуктивні умови для забезпечення процесу розвитку всієї соціальної сфери держави. Основними факторами реалізації діяльності установ соціального захисту є запровадження соціального страхування та надання всіх видів соціальної допомоги. Головними завданнями соціального захисту населення в країні є забезпечення економічно-політичних процесів для функціонування системи соціального захисту, запровадження соціальних норм та гарантій, що спрямовані на зменшення відсотка бідності населення, виконання завдань соціально-економічних перетворень у державі, затвердження засад належного ведення соціальної політики всіма фондами. Діяльність установ соціального захисту населення реалізується за спрямуваннями гарантування соціального забезпечення державної складової, повноцінного надання належної соціальної допомоги, реалізації потреб у соціальному обслуговуванні, виконання завдань соціального страхування.
ОСНОВНІ ЗАВДАННЯ ДІАГНОСТИКИ ГОСПОДАРСЬКОЇ ДІЯЛЬНОСТІ ПІДПРИЄМСТВА
Authors:   Вінницький соціально-економічний інститут університету «Україна», Балахонова Олеся , Приймак Яна ,   Вінницький соціально-економічний інститут університету «Україна»
Published: February 2023

У статті відмічено, що виконання діагностики господарської діяльності підприємства є актуальним завданням: на основі її оцінки виробляються основні напрями його фінансово-економічної політики. Діагностика господарської діяльності підприємства носить дискретний характер і формується під впливом складного комплексу чинників середовища функціонування (зовнішнього та внутрішнього). Діагностика діяльності підприємства розподіляється для внутрішніх та зовнішніх користувачів. Діагностика господарської діяльності підприємства є початковим етапом розробки та формування стратегії забезпечення його фінансової стійкості, що здійснюється на основі вивчення та дослідження трьох складових: макросередовища, мікро середовища та внутрішнього середовища. Завданням діагностики внутрішнього середовища підприємства є визначення потенціалу, що дає йому можливість успішно функціонувати. Завданням діагностики зовнішнього середовища являється аналіз джерел економічних ресурсів підприємства, що необхідні для підтримки його внутрішнього потенціалу на належному рівні.
ОСНОВНІ АСПЕКТИ ЕКОЛОГІЧНОЇ ВІДПОВІДАЛЬНОСТІ В ЄС ТА УКРАЇНІ
Authors:   Вінницький соціально-економічний інститут університету «Україна», Мазур Вадим , Олійник Олеся
Published: February 2023

В цьому дослідженні розглядається природоохоронне законодавство України та його застосування на практиці, а також має на меті визначити основні проблеми, з якими воно стикається.
СУЧАСНІ ПІДХОДИ ДО ТРАКТУВАННЯ ПОНЯТТЯ «ОБОРОТНІ АКТИВИ»
Authors:   Вінницький соціально-економічний інститут університету «Україна», Омельченко Олена , Янковий Артем ,   Вінницький соціально-економічний інститут університету «Україна»
Published: February 2023

В статті розглянуто розбіжності трактування оборотних активів та поточних активів. Проведено вивчення та аналіз літератури щодо визначення поняття «оборотних активів». Приділено увагу основним підходам до трактування оборотних активів вітчизняними та зарубіжними науковцями. На основі проведеного теоретичного аналізу здійснено групування усіх понять «оборотних активів» та сформовано власне визначення.
ЕКОЦИД ТА УРБАНІЦИД В УКРАЇНІ: НАСЛІДКИ РОСІЙСЬКО-УКРАЇНСЬКОЇ ВІЙНИ ТА ЕТАПИ ПОВОЄННОГО ВІДНОВЛЕННЯ
Authors:   Державний податковий університет, Сокур Марина
Published: February 2023

В статті проведено аналіз наслідків російської агресії проти України, а саме екоциду та урбаніциду. Досліджено обсяги та характер завданої шкоди українській природі та населеним пунктам України. Розглянута можливість використання підходів циркулярної економіки для повоєнного відновлення України, в тому числі за допомогою «зеленого відновлення».
A Discourse on the Problems Facing Music Business in Nigeria
Authors: Olusoji Stephen
Published: February 2023

Music and the entertainment industry in general are one of the major sources of income and sustainers of the economy in advanced countries of the world. In recent times in Nigeria, music business and the entertainment industry as a whole has witnessed lull in their activities. The industry is fraught with multifarious problems stemming from politics, economic, social, marketing, technology and other environmental constraints. This paper examines the role of music and the entertainment industry as an important but, neglected arm of the Nigerian economy that can rescue it from its present economic predicaments. It discusses the state of art music, commercial and popular music in Nigeria groaning under a depleted economy. It also proffers solutions to the problems highlighted in the paper.
Bi-Musicality, Alternative Musicality and Multiculturalism in Music Education Practice in Other Nations: A Test Case for Nigeria
Authors: Olorunsogo Adetutu A.
Published: February 2023

In recent years, the phenomenon of Bi-Musicality is gaining the attention of Music Educators and Musicologists. At another level, music education in Nigeria strives towards a paradigm shift in an attempt to achieve cultural identity in music education delivery. Thus, within the past four decades there has been development of two Cultural and Creative Arts (CCA) Curricula. The first one (FME 1985), was developed for the Junior Secondary School (JSS) level in Nigerian educational system. The second one (FME 2006), was designed for a free and compulsory nine-year Universal Basic Education (UBE) programme for Nigerian citizens. If music education must develop in Nigeria, it is essential to learn from antecedents and music education practice of other lands. This paper therefore focuses on the phenomenon of Bi-musicality, Alternative Musicality, and Multiculturalism in global music education as reflected in Indian and Japanese Music education practice. A cursory look at the practice in these nations presents a challenge for music educators, musicologists and policy makers in Nigeria from which to learn. It is expected that this will serve as a platform for the development of a workable and virile music curriculum for Nigeria if the lessons are adopted.
As-Syatibi Economic Thinking
Authors: Permani Intan , Iskandar Iskandar
Published: February 2023

Berbicara tentang pemikiran As-Syatibi, dimana beliau  mengagas konsep atau pemikiran tentang ekonomi dalam ruang lingkup produksi, konsumsi dan distribusi. metode yang digunakan dalam penelitian ini adalah metode kepustakaan. Metode ini menggunakan documenter yang bersumber dari literaratur seperti, jurnal, buku, makalah dan internet yang membahas tentang pemikiran As-Syatibi tentang ekonomi Islam. Landasan berpijak dari pada pemikiran As-Syatibi tentang ekonomi mengacu pada konsep Maqashid Syariah yang orientasinya melahirkan Maslahah Mursalah. Pemikiran As-Syatibi ini diyakini sangat ideal untuk diimplementasikan dimasa modern ini karena pemikiran dan gagasan tentang ekonomi terdahulu dirasa sudah sangat tidak relavan. Disamping mampu menjawab tantangan jaman, teori Maqashid syariah yang disandingkan dengan pemikiran ekonomi ini juga harus membawa perubahan yang positif terkhusus untuk individu muslim ketika berhadapan dan terlibat langsung dengan kegiatan ekonomi itu sendiri. Disisi yang lain, As-syatibi membagi kebutuhan dan memberikan pandangan bahwa kebutuhan itu harus bersandar pada skala prioritas yang dicocokan dengan masing-masing tingkatan kebutuhannya. Adapun yang menjadi tingkatan nilai-nilai dalam perspektif ekonomi, As-Syatibi membagi menjadi tiga, pertama Dharuryah.kedua, Hajjiyah. Dan yang ketiga Tahsiniyah.
Internet of Things in the mining industry – security technologies in their application
Authors:   University of Mining and Geology “St. Ivan Rilski”, Anastasova Yordanka
Published: February 2023

The Internet of Things are essentially huge networks of connected devices that collect and share data (information) both for specific processes and their application environment. The use of the Internet of Things (IoT) is changing every industry because it allows device-to-device communication and automates the maintenance, communication, and interaction between processes and their management. IoT gives businesses real-time information on how their companies' systems work, significantly reducing labour costs. For this reason, more and more mining companies are taking advantage of the opportunities provided by IoT, creating their own networks of devices and communication environment. At the same time, IoT has become one of the most critical technologies of our century, due to the fact that cloud technologies and Wi-Fi networks, which are the basis of IoT, have become an attractive place for cyberattacks. The data collected by IoT sensors contain a huge amount of personal and company information, hence, it is especially important that they are securely stored and maximally protected. This article discusses some critically important technologies to ensure the security of IoT implementation and use in the mining industry.
Magnesite beneficiation methods: a review
Authors:   National Technical University of Athens, Bimpilas Georgios-Michail , Anastassakis Georgios ,   National Technical University of Athens
Published: February 2023

Magnesite is one of the most important mineral commodities mostly because of its technological and industrial applications. The most important commercial sources for its recovery are the corresponding ores. The deposits are characterised by the differences in reference to magnesite mineral crystallinity and gangue composition. For these reasons, the separation efficiency of magnesite from gangue varies from relatively easy to impossible. Another problem is the stocked waste, often of relatively high-grade in magnesite, derived from industrial processing, which may be viewed as future potential deposits. This paper contributes a detailed review on the methods applied to separate magnesite from gangue both on industrial and bench scale; potential processing methods for fine particle size are also reviewed.
Efficiency of microbial fuel cells based on the sulphate-reduction by ethanol
Authors:   University of Mining and Geology “St. Ivan Rilski", Bratkova Svetlana , Alexieva Zlatka ,   Institute of Microbiology, Bulgarian Academy of Sciences, Angelov Anatoliy ,   University of Mining and Geology “St. Ivan Rilski”, Nikolova Katerina ,   University of Mining and Geology “St. Ivan Rilski", Genova Petia ,   University of Mining and Geology “St. Ivan Rilski", Ivanov Rosen ,   University of Mining and Geology “St. Ivan Rilski", Gerginova Maria ,   Institute of Microbiology, Bulgarian Academy of Sciences, Peneva Nadejda ,   Institute of Microbiology, Bulgarian Academy of Sciences
Published: February 2023

The influence of hydraulic retention time (HRT) on the rate of sulphate-reduction and electricity generation of microbial fuel cell fed with ethanol was studied. The experiments were performed in the laboratory installation, consisting of an anaerobic fixed-bed reactor and a microbial fuel cell with air-cathode. An effective sulphate removal was achieved at hydraulic retention times 44 and 66 h. The effectiveness of COD removal raises with increasing the hydraulic retention time. The highest maximum power density of 258 mW/m2 was obtained at 22 h HRT. The use of ethanol as an electron donor had a great impact on the composition of the microbial community. The metagenomic data obtained showed that the most abundant phylum in bacterial community was Proteobacteria – 87.8 %, and particularly Gammaproteobacteria – 53,1%. The sulphate reducing bacteria that can incompletely oxidise organic compounds usually with acetate as an end product were presented in the microbial community in anodic chamber. The dominant microbial species among sulphate reducing bacteria was Desulfomicrobium mexicanus (19,79%).
SEISMIC EXPLORATIONS FOR DEFINING THE DAMAGE TO THE EARTH DAM PISHICA IN THE REPUBLIC OF NORTH MACEDONIA
Authors:   University of Goce Delchev, Shtip, Macedonia, Doneva Blagica , Delipetrev Marjan ,   University of Goce Delchev, Shtip, Macedonia, Dimov Gorgi ,   University of Goce Delchev, Shtip, Macedonia
Published: February 2023

The reservoir was built in the middle of the 20th century with a total capacity of 750,000 m3. The height of the dam from the river terrace is 22 m, the length of the crown is 319 m, and the width of the crown is 6 m. Due to the low resistance of the earth dam and the increase of water level due to heavy rains, the lake has leaked on several occasions, causing floods and environmental disaster in the surrounding settlements. Due to heavy rains and overflow through the dam crown, damage to the downstream slope of the dam has occurred and the overall stability of the dam has been compromised. By controlled discharge of the reservoir it is brought to a stable state and the dam breakage is prevented. At the beginning of 2013, the outflow valves of the dam were opened as a result of heavy rains, with reservoir water flowing to more places and residents of the village and livestock evacuated. At the crown of the dam where there was the largest outflow of water, a gap of about 20 m wide and 3.5-4 m thick appeared. Geophysical - seismic surveys have been conducted to determine dam damage.
Rationalising the location and design of the waste dump in the case of open-pit mining
Authors:   University of Mining and Geology “St. Ivan Rilski”, Kaykov Dimitar , Koprev Ivaylo ,   University of Mining and Geology “St. Ivan Rilski”
Published: February 2023

The location for dumping the waste from the open-pit mine has a significant weight for the establishment of the waste treatment costs. According to the constructive parameters of the waste dump and the terrain’s characteristics, the volume of the affected area is determined, in relation to the waste volume generated from the exploitation of a mineral deposit. In order to optimise the waste dump’s location and its constructive parameters, a number of alternatives have to be taken into account. These alternatives have to be technically plausible, as well as their safety factor must be satisfactory. Based on the considered alternatives, the optimisation problem can be defined so that the optimal solution provides the required capacity of the waste dump, as well as a minimal area of negative environmental impact and lowest operational costs.
PROCESSING OF PYRITE CONCENTRATES WITH THE EXTRACTION OF NONFERROUS METALS: NICKEL AND COBALT TECHNOLOGY ELABORATION
Authors:   Satbayev University, Kazakhstan, Almaty, Luganov V. A. , Chepushtanova T. A. ,   Satbayev University, Kazakhstan, Almaty, Guseynova G. D. ,   Satbayev University, Kazakhstan, Almaty, Merkibayev Y. S. ,   Satbayev University, Kazakhstan, Almaty, Mamyrbaeva K. K. ,   Satbayev University, Kazakhstan, Almaty, Mishra B. ,   Worcester polytechnic institute, USA
Published: February 2023

The paper presents the results of the development of a technology for processing of pyrite concentrates with the extraction of nonferrous metals, iron and sulphur using the technology of two-stage dissociating roasting with hydrometallurgical processing of cinder. Hydrometallurgical processing of cinder was studied. It comprised of two steps - cinder leaching and extraction for processing multi-component solutions. Based on the results of laboratory tests, balance experiments were conducted on the chemical enrichment of nickel-poor and cobaltpyrite concentrates. The experiments included (i) Thermal decomposition of pyrite concentrate at a temperature of 660 - 700° C and a duration of 60 minutes, an oxygen flow rate of 30-50% of the stoichiometric; (ii) Leaching of the cinder with a HCl solution at a temperature of 90°C, liquid: solid = 8:1, pH 2,7 and a duration of 60 minutes; (iii) Filtration of pulp and precipitation of nickel and cobalt from solutions with iron sulphide. During leaching, mainly iron is transferred to the solution; nickel and cobalt remain in a small amount of cake (the cake weight is reduced by almost ten times compared to the thermal decomposition product). As a result, up to 99% of non-ferrous metals are extracted into the concentrate, and the solution becomes more concentrated in iron.
STUDY OF THE RELATIVE ENERGY CONSUMPTION OF A DRUM MILL TYPE SAG 8.5 X 5.3
Authors:   University of Mining and Geology “St. Ivan Rilski”, Minin Ivan , Nedyalkov Petko ,   University of Mining and Geology “St. Ivan Rilski”, Savov Simeon ,   University of Mining and Geology “St. Ivan Rilski”,, Hristova Teodora ,   University of Mining and Geology “St. Ivan Rilski”
Published: February 2023

The article discusses the topic of the specific power consumption of a drum mill type SAG 8.5x5.3. The purpose of the study is to determine the influence of some basic parameters like angular velocity of the mill drum, the wear on the drum’s lining, mass of the mill filling, loading rate of the mill with ore and flow rate of incoming water of the product to be milled on the relative power consumption of the mill for maintaining quality. To determine the energy consumption of the mill, the listed parameters were measured and a Fisher matrix was constructed. In accordance with the selected target function, energy consumption patterns are synthesised depending on the loading rate of the mill with ore, the mass of the mill filling,the flow rate of the incoming water and the wear on the drum’s lining. Data processing was performed using the STATGRAPHICS computer programme and an adequate model has been found according to the selected target function. The target function has been found to satisfy the conditions for maintaining quality and reducing costs.
TREATMENT OF SULPHATES-RICH SOLUTIONS THROUGH ETTRINGITE PRECIPITATION WITH INDUSTRIAL REAGENTS
Authors:   University of Mining and Geology “St. Ivan Rilski”, Nikolova Katerina , Bratkova Svetlana ,   University of Mining and Geology “St. Ivan Rilski”, Angelov Anatoliy ,   University of Mining and Geology “St. Ivan Rilski”,, Genova Petia ,   University of Mining and Geology “St. Ivan Rilski”, Ivanov Rosen ,   University of Mining and Geology “St. Ivan Rilski", Stefanova Ani ,   University of Mining and Geology “St. Ivan Rilski"
Published: February 2023

Mine wastewaters are often characterised with high concentrations of sulphates, heavy metals and increased electrical conductivity. It is mandatory for the industry to implement convenient treatment methods in order to reduce these parameters. The aluminium precipitation with the simultaneous formation of ettringite was chosen for laboratory testing as it is appropriate when the concentrations of sulphates have to be reduced– up to 300 mg/l according to the Bulgarian regulatory framework. In the present study synthetic waters were treated, as their composition was similar to that of typical mining effluents. Initially, the pH of the solutions was adjusted to 9.0 with Ca(OH)2 and thus the heavy metals precipitated in the form of hydroxides. Then, an aluminium source was added as Al-cement, industrial Na-aluminate or aluminium oxychloride. The best results in terms of sulphates and electrical conductivity decrease were obtained with Al-cement (69 – 100 % sulphates removal rate), but the quantities of the generated sludges were large, which raises the question of their proper disposal. With the industrial Na-aluminate the rate of removal of sulphates was very low and with AlOCl it was 96%. However, the use of both reagents showed an increase in the electrical conductivity of the treated solutions.
NON-DETONATING CHARGES IN POLYMER HOUSINGS FOR SMOOTH SPLITTING OF ROCK BLOCKS DURING PRIMARY EXTRACTION AND SECONDARY CUTTING
Authors:   University of Mining and Geology “St. Ivan Rilski”, Stoycheva Nadezhda , Shishkov Petar ,   University of Mining and Geology “St. Ivan Rilski”
Published: February 2023

In some cases, during the extraction of certain mineral resources, industrial explosives are not sufficiently safe for the environment in terms of generated shock waves, toxic gases, seismic waves, scattering and vibrations. The main reasons for these harmful effects of the explosion are the speed and the mechanism of the chemical reaction of explosive decomposition. The authors have focused their research on a variety of fast-combusting high-energetic compositions, that can fully replace the widely used detonating explosives in the extraction and secondary processing (cutting) of large stone blocks. Samples from polymer containers filled with non-detonating compositions, based on waste gunpowder and metal-containing pyrotechnic mixtures were subjected to field tests. The experiments were performed in real conditions on stone blocks with hardness f = 16 according to the Protodyakonov rock strength scale. Depending on the lengths of the blast holes, different charge designs were used.
DETECTION AND MONITORING OF MANGANESE IN DRINKING WATER AND GROUNDWATER THROUGH PHOTO-OXIDATION SENSORY REACTION WITH ULTRASMALL CARBON NANODOTS
Authors:   University of Mining and Geology “St. Ivan Rilski”, Toshev Svetlin , Loukanov Alexandre ,   University of Mining and Geology “St. Ivan Rilski”,   Division of Strategic Research and Development, Graduate School of Science and Engineering, Shimo–Ohkubo 255, Sakura–Ku, Saitama 338-8570, Japan
Published: February 2023

The paper focuses on the development of ultra-small carbon nanodots as sensitive sensors for detection and monitoring of manganese in drinking water and groundwater. The environmental contamination with manganese is often a result from industrial activities such as mining and agriculture. The soluble Mn ions are toxic for many organisms and might even cause serious human diseases. The strategy for sensory detection used by us is based on a photo-oxidation reaction, in which the carbon nanodots are dissolved in acidic solution and illuminated with UV irradiation ( = 365 nm). At these conditions the nanoparticles acted as photosensitizer and produced singlet oxygen, which can be monitored by 3,3’,5,5’-tetramethylbenzidine as an organic indicator. However, to proceed this reaction, it is necessary to introduce the redox pair Mn(II)/Mn(III) in the reaction mixture, which plays the role of a catalytic mediator for the electron transfer. Thus, the oxidation of 3,3’,5,5’-tetramethylbenzidine appears, which results in blue colour of the solution with absorbance maximum at 645 nm. The rate of this sensory reaction was significantly enhanced in the presence of EDTA, which was used as a ligand to obtain a stable complex of Mn(III)/EDTA. The formed complex itself oxidised the organic indicator and caused the colorimetric reaction. Among the other metal ions tested, only manganese could be detected by the presented sensory approach.
Doing digital business with robots: Necessary knowledge and skills of employees in digital age
Authors: Lukić-Nikolić Jelena , Brkljač Milan , Jovanović Jovan
Published: February 2023

The aim of this paper is to point out the new knowledge and skills that employees need to have in the digital age in which robots are becoming more and more present in the workplace. Robots started to over work tasks and activities that are routine, repetitive and highly standardized. With the progress of technology, robots are starting to take over more complex and challenging work tasks as well. As a result, employees are faced with new challenges and fears. Fear of job loss and job insecurity fostered employees to acquire new knowledge and skills that cannot be automated. Continuous learning is becoming the destiny of every individual who lives and works in the digital age.
Tourist potentials in the function of economic development Rasina district
Authors: Milićević Raica , Momirović Dragan , Vujičić Slađana
Published: February 2023

The key priority for the development of tourism in the Rasin district is a realistic base of quality tourist attractions and functionality of natural, anthropogenic and material potentials. The wealth of various combasic tourist potentials, with attractive motives and competitive advantages, represents a base that enables the formation of a selectable tourist product based on mountain, spa, cultural, hunting, and rural tourism. The structuring of the tourist product of the Rasin district should be based on evident requirements and expected modern tendencies and trends of domestic and foreign demand, as well as the necessary establishment and functioning of market-oriented and sustainable economic developments to satisfy various tourist needs. Based on the SWOT analysis and defined criteria, the priorities of the first and second categories of tourism development were determined by the available tourist resources and advantages of the Rasin districts. Identifying and defining tourism development priorities is of great practical importance from the point of view of assessing real potential opportunities and the direction of the district's economic development policy to achieve coordinated development.
The relationships between Stress, Dark Triad personality and utilitarian Moral Judgment
Authors: Martins Ana Teresa , Sobral Tiago , Jiménez-Ros Antonia María , Faísca Luís
Published: February 2023

There is a growing evidence that stress affects cognitive and emotional processes underling decision making. However, according some authors, subclinical personality traits of the participants must be also considered in this relation between stress and moral decision. Our study examines whether stress affects moral decision-making according two different subclinical personalities. Forty undergraduate volunteers were previously distributed according their personality traits (Machiavellian; Narcissism and Normal) and randomly assigned to both conditions (stress vs. control). The stress induction was assessed with a self-reported questionnaire and with a measurement of heart rate. All participants performed a moral decision-making task in which every day moral dilemmas were described. The main results suggest that stress group made less utilitarian choices when compared to control group. Although machiavellian and narcissistic participants made more utilitarian decisions; the interaction between stress, personality and moral judgment did not reach significance.   We conclude that stress induction predisposed participants to less utilitarian responses when faced to personal and impersonal moral dilemmas. We also suggested that subclinical personality (particularly narcissism) seems to be less permeable to stress; revealing the same moral utilitarian pattern in both experimental conditions.
Forces et fragilités au sein des communautés nouvelles catholiques
Authors: van Lier Rick
Published: February 2023

Les communautés nouvelles, réelles forces dans le paysage catholique contemporain, sont touchées, pour un certain nombre d’entre elles, par des crises diverses. Des abus de toutes sortes et des dérives sectaires stigmatisent la vie des membres et des communautés. En somme, les communautés nouvelles s’avèrent être plus fragiles que nous ne l’aurions cru de prime abord. Quelles sont les causes des difficultés éprouvées ? En examinant la question, l’auteur se propose de dresser un état des lieux en pointant les principales dimensions névralgiques dans la vie des communautés souffrantes. Cette étape, préalable à toutes les autres, est destinée à ouvrir la voie à d’ultérieures recherches et interventions.
Oligodendrocyte-lineage cell exocytosis and L-type prostaglandin D synthase promote oligodendrocyte development and myelination
Authors: Pan Lin , Trimarco Amelia , Zhang Alice J , Fujimori Ko , Urade Yoshihiro , Sun Lu O , Taveggia Carla , Zhang Ye
Published: February 2023

In the developing central nervous system, oligodendrocyte precursor cells (OPCs) differentiate into oligodendrocytes, which form myelin around axons. Oligodendrocytes and myelin are essential for the function of the central nervous system, as evidenced by the severe neurological symptoms that arise in demyelinating diseases such as multiple sclerosis and leukodystrophy. Although many cell-intrinsic mechanisms that regulate oligodendrocyte development and myelination have been reported, it remains unclear whether interactions among oligodendrocyte-lineage cells (OPCs and oligodendrocytes) affect oligodendrocyte development and myelination. Here, we show that blocking vesicle-associated membrane protein (VAMP) 1/2/3-dependent exocytosis from oligodendrocyte-lineage cells impairs oligodendrocyte development, myelination, and motor behavior in mice. Adding oligodendrocyte-lineage cell-secreted molecules to secretion-deficient OPC cultures partially restores the morphological maturation of oligodendrocytes. Moreover, we identified L-type prostaglandin D synthase as an oligodendrocyte-lineage cell-secreted protein that promotes oligodendrocyte development and myelination in vivo. These findings reveal a novel autocrine/paracrine loop model for the regulation of oligodendrocyte and myelin development.
Single spikes drive sequential propagation and routing of activity in a cortical network
Authors: Riquelme Juan Luis , Hemberger Mike , Laurent Gilles , Gjorgjieva Julijana
Published: February 2023

Single spikes can trigger repeatable firing sequences in cortical networks. The mechanisms that support reliable propagation of activity from such small events and their functional consequences remain unclear. By constraining a recurrent network model with experimental statistics from turtle cortex, we generate reliable and temporally precise sequences from single spike triggers. We find that rare strong connections support sequence propagation, while dense weak connections modulate propagation reliability. We identify sections of sequences corresponding to divergent branches of strongly connected neurons which can be selectively gated. Applying external inputs to specific neurons in the sparse backbone of strong connections can effectively control propagation and route activity within the network. Finally, we demonstrate that concurrent sequences interact reliably, generating a highly combinatorial space of sequence activations. Our results reveal the impact of individual spikes in cortical circuits, detailing how repeatable sequences of activity can be triggered, sustained, and controlled during cortical computations.
Csf1 from marrow adipogenic precursors is required for osteoclast formation and hematopoiesis in bone
Authors: Zhong Leilei , Lu Jiawei , Fang Jiankang , Yao Lutian , Yu Wei , Gui Tao , Duffy Michael , Holdreith Nicholas , Bautista Catherine A , Huang Xiaobin , Bandyopadhyay Shovik , Tan Kai , Chen Chider , Choi Yongwon , Jiang Jean X , Yang Shuying , Tong Wei , Dyment Nathanial , Qin Ling
Published: February 2023

Colony-stimulating factor 1 (Csf1) is an essential growth factor for osteoclast progenitors and an important regulator for bone resorption. It remains elusive which mesenchymal cells synthesize Csf1 to stimulate osteoclastogenesis. We recently identified a novel mesenchymal cell population, marrow adipogenic lineage precursors (MALPs), in bone. Compared to other mesenchymal subpopulations, MALPs expressed Csf1 at a much higher level and this expression was further increased during aging. To investigate its role, we constructed MALP-deficient Csf1 CKO mice using AdipoqCre. These mice had increased femoral trabecular bone mass, but their cortical bone appeared normal. In comparison, depletion of Csf1 in the entire mesenchymal lineage using Prrx1Cre led to a more striking high bone mass phenotype, suggesting that additional mesenchymal subpopulations secrete Csf1. TRAP staining revealed diminished osteoclasts in the femoral secondary spongiosa region of Csf1 CKOAdipoq mice, but not at the chondral-osseous junction nor at the endosteal surface of cortical bone. Moreover, Csf1 CKOAdipoq mice were resistant to LPS-induced calvarial osteolysis. Bone marrow cellularity, hematopoietic progenitors, and macrophages were also reduced in these mice. Taken together, our studies demonstrate that MALPs synthesize Csf1 to control bone remodeling and hematopoiesis.
Bone marrow Adipoq-lineage progenitors are a major cellular source of M-CSF that dominates bone marrow macrophage development, osteoclastogenesis, and bone mass
Authors: Inoue Kazuki , Qin Yongli , Xia Yuhan , Han Jie , Yuan Ruoxi , Sun Jun , Xu Ren , Jiang Jean X , Greenblatt Matthew B , Zhao Baohong
Published: February 2023

M-CSF is a critical growth factor for myeloid lineage cells, including monocytes, macrophages, and osteoclasts. Tissue-resident macrophages in most organs rely on local M-CSF. However, it is unclear what specific cells in the bone marrow produce M-CSF to maintain myeloid homeostasis. Here, we found that Adipoq-lineage progenitors but not mature adipocytes in bone marrow or in peripheral adipose tissue, are a major cellular source of M-CSF, with these Adipoq-lineage progenitors producing M-CSF at levels much higher than those produced by osteoblast lineage cells. The Adipoq-lineage progenitors with high CSF1 expression also exist in human bone marrow. Deficiency of M-CSF in bone marrow Adipoq-lineage progenitors drastically reduces the generation of bone marrow macrophages and osteoclasts, leading to severe osteopetrosis in mice. Furthermore, the osteoporosis in ovariectomized mice can be significantly alleviated by the absence of M-CSF in bone marrow Adipoq-lineage progenitors. Our findings identify bone marrow Adipoq-lineage progenitors as a major cellular source of M-CSF in bone marrow and reveal their crucial contribution to bone marrow macrophage development, osteoclastogenesis, bone homeostasis, and pathological bone loss.
The rising trend of Metaverse in education: challenges, opportunities, and ethical considerations
Authors: Kaddoura Sanaa , Al Husseiny Fatima
Published: February 2023

Metaverse is invading the educational sector and will change human-computer interaction techniques. Prominent technology executives are developing novel ways to turn the Metaverse into a learning environment, considering the rapid growth of technology. Since the COVID-19 outbreak, people have grown accustomed to teleworking, telemedicine, and numerous other forms of distance interaction. Recently, the Metaverse has been the focus of many educators. With Facebook’s statement that it was rebranding and promoting itself as Meta, this field saw a surge in interest in the areas of computer science and education. There is a literature gap in studying the Metaverse’s role in education. This article is a systematic review following the PRISMA framework that reviews the role of the Metaverse in education to shrink the literature gap. It presents various educational uses to aid future research in this field. Additionally, it demonstrates how enabling technologies like extended reality (XR) and the internet of everything (IoE) will significantly impact educational services in the Metaverses of the future of teaching and learning. The article also outlines key challenges, ethical issues, and potential threats to using the Metaverse for education to offer a road map for future research that will investigate how the Metaverse will improve learning and teaching experiences.
Association between geriatric nutritional risk index and pathological phenotypes of IgA nephropathy
Authors: Gan Yangang , Li Jiajia , Wu Jianping , Zhang Rui , Han Qianqian , Li Zizhen , Yang Qiongqiong
Published: February 2023

Background

IgA nephropathy (IgAN) is an immune disease related to oxidative stress and inflammation. It is the most common type of glomerulonephritis in the world and is the cause of chronic kidney disease and end-stage renal disease (ESRD). The Geriatric Nutritional Risk Index (GNRI) is a practical and uncomplicated method to assess the risk of morbidity and mortality, but its ability to assess IgAN is still unclear. Here, we evaluated the association between the GNRI and clinical and histologic findings of IgAN.

Methods

In a cross–sectional study, we included 348 biopsy-verified IgAN patients. The Oxford classification was used to analyze the pathological characteristics of the included patients. Based on previous studies, the participants were divided into two groups using a cutoff value of 92. Differences in clinicopathological indices between the two groups were compared. The correlation between the GNRI and the indicators was evaluated by using a bivariate correlation analysis. A binary logistic regression analysis was conducted to determine the factors associated with the crescent lesions in IgAN.

Results

In this study, 138 out of 348 patients (39.7%) had low GNRI scores (GNRI < 92). Patients in the low GNRI group tended to have a significantly lower body mass index; lower hemoglobin, serum albumin, serum IgG, and serum C3 levels; and higher 24-h proteinuria. The proportions of females, Oxford M1 and Oxford C1/2 were higher in the low GNRI group. The GNRI was positively correlated with body mass index (r = 0.57, P < 0.001), hemoglobin (r = 0.35, P < 0.001), serum albumin (r = 0.83, P < 0.001), serum IgG (r = 0.32, P < 0.001), and serum C3 (r = 0.26, P < 0.001) and negatively correlated with 24-h proteinuria (r = −0.36, P < 0.001) and the proportion of crescents (r = −0.24, P < 0.001). The GNRI scores and serum IgG levels were considered independent factors influencing the crescent lesions in IgAN.

Conclusions

The GNRI can reflect the severity of clinical and histologic phenotypes in IgAN patients. Lower GNRI and serum IgG levels may suggest an increased risk of crescent lesions and are potential markers for disease monitoring in IgAN.
Leaf color change and photosystem function evaluation under heat treatment revealed the stress resistance variation between Loropetalum chinense and L. chinense var. rubrum
Authors: Cai Wenqi , Zhang Damao , Zhang Xia , Chen Qianru , Liu Yang , Lin Ling , Xiang Lili , Yang Yujie , Xu Lu , Yu Xiaoying , Li Yanlin
Published: February 2023

This research mainly focused on the leaf color change and photosystem function differentiation between Loropetalum chinense and its variety L. chinense var. rubrum under heat stress, which were tightly concerned about their ornamental traits and growth. L. chinense ‘Xiangnong Xiangyun’ (X) and L. chinense var. rubrum ‘Xiangnong Fendai’ (F) and L. chinense var. rubrum ‘Hei Zhenzhu’ (H) were chosen to be experimented on to investigate whether leaf color morphology and pigment composition could influence the adaptability of plants to high temperature in order to select foliage plants which posses stable leaf color and better adaptability for hot regions. The plants were cultured in hot environment (40 °C/33 °C, day/night) and normal environment (25 °C/18 °C, day/night). Phenotype and anatomic observation of three cultivars were made and leaf color indices and pigment contents were measured. During the experiment, H and F gradually turned green, total anthocyanins contents significantly decreased in them, however, chlorophyll b contents increased in all three cultivars. In addition, the initial fluorescence (Fo) decreased in X, while increased in H and F. For the maximum fluorescence (Fm) and maximum photochemical efficiency of PSII (Fv/Fm), they only increased in H and decreased in both F and X. The non-photochemical chlorophyll fluorescence quenching (NPQ) also increased in H and decreased in F. For X, it increased at first then gradually decreased. The coefficient of photochemical quenching all increased at first then gradually decreased. Correlation analysis between showed that there was relatively strong connection between anthocyanins, flavonoids and chlorophyll fluorescence parameters, especially NPQ, proved anthocyanins and flavonoids might not only involved in enriching leaf color, but also interfered with the protection of photosystem. Generally speaking, we found higher anthocyanin and flavonoids content level not only dramatically enriched the leaf color of L. chinense var. rubrum cultivars, but also offered more potential antioxidant to keep their normal growth when encountered heat stress.
Distribution Differences of Shikimic Acid in Cultivated Illicium lanceolatum
Authors: Cao Y. H.
Published: February 2023

Shikimic acid is an important intermediate to oseltamivir phosphate which is the most effective drug for treating bird flu disease. This study was performed to determine the shikimic acid distribution of Illicium lanceolatum which was affected by its age, light condition and ecotype. The results indicated that the age of trees had an optimal effect on its content of leaves and it maintained at the highest level as trees grew. Whereas the content in root and branch declined with increasing age. The 50% light condition promoted accumulation of schikimic acid and the leaf contained the highest level of that regardless of the light conditions. The Wu’ning ecotype produced the largest amount of that in all organs. The result that the shikimic acid content in the leaves was higher than in the root indicated that the leaves can substitute for the root which was a traditional medicinal part. Possible mechanisms for the enhanced content are discussed. Findings from this study have provided the scientific bases for promoting shikimic acid industry, and developing a high efficiency artificial cultivation system of I.lanceolatum.