bluuebunny/crossref_metadata_2025 huggingface dataset:
The Thai SME Open Innovation Food-Machinery Flexibility Model
Authors: Hongsaprabhas Throngvid , Parisot Xavier
Published: March 2022

Food machinery SMEs have been essential constitutional actors in Thailand’s food industry. Their participation in food innovation is considerably recognized. However, their innovation logics and practices remain poorly understood. To understand the role of open innovation (OI) in this change, specifically the OI logics and practices in new product development (NPD), the food-machinery framework has been chosen to analyze 109 NPDs in 2 Thai food machinery SMEs. This model identifies the various flows of knowledge between the different actors. The results demonstrated the new OI practices being absent from previous typologies, and six distinctive patterns within the same framework. These alternatives were revealed through the distinction between laboratory and industrial scales. The refined model demonstrated the ability of Thai SMEs to adjust OI logics and practices to the nature of the collaborative strategy associated with each NPD. Finally, the results exposed some Thai SMEs switching their business from generic machinery companies to innovation intermediaries.
Potential of International EMail Projects in the Process of Teaching a Foreign Language in Secondary School
Authors: Shapovalova Larisa , Koljada Natalija , Petrova Ekaterina , Gorgennikova Julija
Published: March 2022

The purpose of the article is to identify the theoretical foundations of the implementation of E-Mail projects in the process of teaching foreign languages; to analyze the results of implemented E-Mail projects; to encourage the implementation of similar projects in order to create conditions for intercultural interaction of students, to determine the role of partner teachers organizing international E-Mail projects. Statistical processing and visualization of data was carried out using the automatic calculation of the Student's t-test and the Microsoft Office 2019 package. The survey was conducted among 85 secondary school students aged 12 to 15 years who study German as a second foreign language; 25 coordinators of international E-Mail projects – teachers of German, undergraduates and students of the Department of German Philology of the Institute of Philology, Journalism and Intercultural Communication of the Southern Federal University. The conducted testing revealed positive aspects of the introduction of international E-Mail projects in the process of teaching.
Innovating Professional Societies for the New Blue Economy
Authors: Manley Justin
Published: February 2022

Abstract The emerging Blue Economy will depend upon a broad network of professionals and associated professional societies. This commentary presents features those societies may want to embrace to thrive in the future. It also discusses drivers these organizations should
understand and hypothesizes what future professional societies may offer the Blue Economy.
The Ocean Enterprise 2015‐2020: A Study of U.S. New Blue Economy Business Activity
Authors: Rayner Ralph , Gouldman Carl , Tobin Catherine
Published: February 2022

Abstract This commentary summarizes the results of a study of the changes in the scale and scope of U.S. New Blue Economy business activity over the period of 2015‐2020. Drawing on the results of 2015 and 2020 web surveys and secondary analyses of the activities of
U.S. businesses determined to be active in the provision of New Blue Economy products and services, it describes how this important industry cluster is responding to changes in the requirements for data and information to support the wider Blue Economy.
Vision of Sustainable Ocean Economy Transcends Money Matters
Authors: Ryabinin Vladimir
Published: February 2022

Abstract The emerging concept of sustainable ocean planning offers humankind a possibility to reverse the decline in ocean health and create an equitable and sustainable ocean economy. This ocean-based quantum leap towards sustainability is enabled by a number of important
interconnected initiatives, including the United Nations Decade of Ocean Science for Sustainable Development, inclusion of the ocean in national economic accounting, and guided expansion of science-based ocean policies and management mechanisms.
Ocean Container Carrier Selection Using Fuzzy TOPSIS Method: Customers' Perspective
Authors: Ergin Ayfer , Feizollahi Mohammad Javad , Kutlu Can
Published: February 2022

Abstract Ocean container carriers (OCCs) compete with their competitors and increase their market share depending upon their customers. Shippers, consignees, and freight forwarders all have varied expectations from the services provided by OCCs. This study aims to determine
which selection criteria are used while assigning OCCs and also identify which criteria are preferred under recent conditions by considering the perspective of shippers, consignees, and freight forwarders. As far as we know, this is the first study to utilize the fuzzy Technique for Order
Preference by Similarity to an Ideal Solution method to examine OCC selection studies. Another aim of the study is to expand the literature on OCC studies. A total of 146 surveys were collected for the study, which included 32 OCC selection criteria from three different customer groups. The
results of the study indicated that the most important criterion for shippers and freight forwarders was equipment availability, while for consignees, on-time notification of the customer was key. It has been observed that the selection criteria for OCCs have changed over time and that customer
relations-related criteria are regarded as more important than freight criterion by shippers and consignees.
A Study of the Performance of Ship Diesel-Electric Propulsion Systems From an Environmental, Energy Efficiency, and Economic Perspective
Authors: Elkafas Ahmed G. , Shouman Mohamed R.
Published: February 2022

Abstract Climate change and air pollution that are enormously impacted by ship emissions have become an intriguing issue, drawing consideration from the shipping industry. The ship's propulsion system is the main contributor to energy efficiency and ship emissions. This research
paper presents a solution to this issue through propelling the ship by using a diesel-electric propulsion system instead of the conventional one. As a case study, a passenger ship is investigated. The results showed that the proposed electric propulsion system has lower emission rates than
the conventional one by 10%, 21%, and 88% for Carbon dioxide, Nitrogen oxides and Sulfur dioxide emissions, respectively. From an energy efficiency point of view, the diesel-electric propulsion system enhances the energy efficiency and complies with the required International Maritime Organization
(IMO) values, as actual energy efficiency is about 66%, 70%, 83%, and 95% of the required IMO values at baseline, Phase 1, Phase 2, and Phase 3, respectively. From the economic point of view, the annual costs are $2.5 and $3.05 million for both diesel-electric and conventional
propulsion systems, respectively. This shows that the annual cost of the diesel-electric option is less than that of the conventional by 22%.
Wave Hindcasting in the Southeastern Coast of Iran
Authors: Kalantari Homayoun , Lari Kamran , Arasteh Afshin Mohseni , Azad Masoud Torabi
Published: February 2022

Abstract Wind-wave characteristics are one of the most important factors in the design of coastal and marine structures. Hence, accurate estimation of wave parameters is crucial. In this paper, we examined the performance of a third-generation spectral wave model, MIKE 21
SW, in estimating wave parameters in the Iranian southeastern coasts over 1 year in 2016 using unstructured triangular mesh. The simulated wave conditions at the southern open boundary and the wind field variable in time and space of the Weather Research and Forecasting model with a spatial
resolution of 0.1 and a temporal resolution of 1 hr were used for evaluating the model. To improve the model's performance, it was calibrated and validated by adjusting white-capping coefficients. The output data including significant wave height (Hs), peak wave period (Tp), and mean wave
direction were compared with the data measured by acoustic Doppler current profiler at three stations of Pasabandar, Pozm, and Meydani on the southeastern coast of Iran. The results revealed that the scatter index for Hs at three stations after calibration was 0.232, 0.363, and 0.684, respectively.
Moreover, the results for mean wave direction were 0.149, 0.181, and 0.288, respectively. The mean model errors for Hs were 0.003 m, 0.233 m, and 0.399 m, respectively, and this error was typically calculated for Tp and mean wave direction at Pasabandar station 0.12 s and 3.80°, respectively.
The finding shows a more accurate prediction of Hs estimation with an appropriate correlation coefficient in three stations with a low bias and upstream. Comparison of the period of modeling waves with measurement data shows the appropriate accuracy of modeling results. According to the climate
modeling results, waves from the north wind (Shamal wind) with periods of less than 8 s and waves from the southwest (Monsoon) with periods of more than 10 s are well distinguishable.
The Case for Microcredentials for Workforce Preparation
Authors: Hotaling Liesl , Van Sumeren Hans
Published: February 2022

Abstract There is a global need for skilled workers across multiple sectors, including the marine industry. To prepare this workforce, we must collectively take action to establish attractive, innovative, agile, and equitable educational opportunities. These opportunities
should capitalize on skill sets from a range of workers and encourage engagement pathways for life-long learning through obtaining microcredentials and professional certificates to promote personal growth, keep pace with technological changes, and capitalize upon opportunities within the New
Blue Economy.
A Review of Stratum-Drilling Robots: Developing for Seabed Exploration
Authors: Zhang Peihao , Chen Jiawang , Tian Zhenwei , Zhu Hai , Ren Ziqiang
Published: February 2022

Abstract This paper proposes a drilling robot solution for subsea stratum exploration and monitoring by analyzing the shortcomings of existing survey equipment in gas hydrate development. The current stratum-drilling robots applied to subsea environments are described in
detail, including their development objectives, detection capabilities, structural components, research progress, and test results. Since several structural and functional similarities exist between planetary exploration and seabed stratum-drilling robots, and the development of planetary
exploration-drilling robots is more sophisticated, various land-based stratum-drilling robots with characteristics are also summarized in detail. Finally, this paper summarizes, compares, and analyzes these stratum-drilling robots, including structure, motion modes, and test effects. Furthermore,
this study develops evaluation criteria for stratum-drilling robots and provides effective research references and clear research directions for future development of seabed stratum-drilling robots.
A New Model to Retrieve Phytoplankton Information From Remote Sensing Signals
Authors: Yang Chaoyu , Ye Haibin
Published: February 2022

Abstract The main objective of this study is to improve the retrieval of phytoplankton absorption coefficients using ocean and land color instrument (OLCI) bands (413, 443, 490, 510, 560, and 665 nm). In this study, the Raman-scattering correction was considered in an analytical
forward model, and the corresponding Raman excitation OLCI band centers were calculated. The coefficients and exponents for the power law model of phytoplankton absorption were determined by a neural network classifier using a combination of sun elevation, photosynthetically active radiation,
and remote sensing reflectance at OLCI bands (413, 443, 490, 510, 560, 620, 665, and 683 nm). Two optimizations were executed. The shape of the colored detrital matter (CDM) spectrum was allowed to change during the second optimization. Based on comparisons of the phytoplankton absorption
coefficients at 443 nm (a Φ[443]) predicted by the improved inversion with field measurements taken from cruise surveys of the Pearl River estuary and Daya Bay and the SeaWiFS Bio-optical Archive and Storage System dataset and NASA bio-Optical Marine Algorithm Dataset,
the modified inversion procedure could provide a good performance (r 2 = 0.86). The results showed that the contribution of Raman scattering to the remote sensing reflectance at 665 nm exceeded 22% in the open ocean. Moreover, the residual from the first optimization was
compared with that from the second optimization, demonstrating that the variable CDM spectral slope in the analytical forward model could improve the accuracy of the forward model.
COVID-19 mRNA Vaccination-induced Lymphadenopathy Mimics Lung Cancer Metastasis On Fluorodeoxyglucose PET/CT Scan
Authors: Hama Yukihiro , Tate Etsuko
Published: February 2022

A 66-year-old man with stage IIA nonsmall cell lung cancer who had complete response to radiation therapy 4.5 years earlier underwent a fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) scan due to elevated CA19-9 levels. PET/CT scan showed a new cluster of left axillary and supraclavicular lymphadenopathy with increased FDG uptake suggesting lymph node metastasis. Later, it was found that the patient received the second dose of coronavirus disease 2019 mRNA vaccine 7 days before the PET/CT. Retrospective evaluation showed a vague linear-shaped metabolic activity in the left deltoid muscle with mild FDG uptake in the injection site. Based on the detailed history and PET/CT findings, a diagnosis of vaccination-induced lymphadenopathy was made. This diagnosis was confirmed after 6 months of follow-up.
Use of Chloroquine and Hydroxychloroquine in COVID-19 Patients
Authors: Bhatia Archana , Bains Sandeep Kumar , Tajinder Bansal , Kuldeep S S , Jaideepa
Published: March 2022

The terror of coronavirus disease 2019 (COVID-19) is present universally. The number of cases is on rise. There is always debate about the use of chloroquine and hydroxychloroquine as a prophylaxis. Healthcare workers being the front-line soldiers need additional protection as compared to general population. This review article highlighted the mechanism of action of both drugs and their role in COVID-19 patients.
Frequency of Breast Disease among Patients Attending Breast Clinic in Tripoli Central Hospital, Tripoli, Libya
Authors: Alsharif Fatma , Abdulrazik Sarah , Alhudiri Inas , Elzagheid Adem , Ismail Faisal
Published: February 2022

Background and Aims:

Breast cancer is the most common cancer in women in the world. This study is aiming to assess the frequency of breast cancer and other breast diseases in Libyan women attending breast clinic in Tripoli Central Hospital.

Materials and Methods:

A cross-sectional survey was obtained through interview questionnaires after having obtained ethical approval. Four hundred patients seeking medical consultation in the outpatients' breast clinic of Tripoli Central Hospital, Libya, from August to October 2019 were included in this study.

Results:

Women aged 35–50 years were the most visiting age group to the breast clinic (53.3%), followed by women older than 50 years and the age group of < 35 years old was the least with about (26%). According to this study, the most common presentation was breast mass (71.8%), the second was breast pain then a nipple discharge with only 8.3%. Patients diagnosed with breast cancer represent 27.5% of patients who attended the clinic, and the majority was having benign conditions.

Conclusion:

The majority of breast lumps are benign and cancer cases represent <1/3rd of cases attending the breast clinic at Tripoli Central Hospital, Tripoli, Libya. Public health education and awareness campaigns regarding the early detection of breast cancer are needed to reduce cancer mortality.
Primary Invasive Gastric Mucormycosis Presenting as Meleney's Gangrene
Authors: Safwan Mohamad , Khan Shafy Ali , Belthazar Anni , Sasidharan Madhu
Published: February 2022

Mucormycosis is an uncommon but potentially lethal fungal infection in immunocompromised individuals. The natural history of the disease is vascular invasion followed by thrombosis and necrosis of infected tissues. It can affect any organ system. Gastrointestinal (GI) mucormycosis is quite rare. Here, we report a case of primary invasive gastric mucormycosis in a 45-year-old male with diabetes and ethanol-related chronic liver disease who presented with necrotizing fascitis of the left thigh, groin, and lower abdominal wall. At presentation, he was hemodynamically unstable, anuric, and febrile with a high blood glucose level. He was stabilized with aggressive debridement and critical care management. During hospitalization, he developed sudden episode of upper GI bleed. Gastroscopy revealed extensive ulcerations with thick mucus in the fundus and body of the stomach. Biopsy from the lesions and special stain examination was consistent with invasive gastric mucormycosis. Delayed presentation of our patient and rapid progression to fungemia resulted in mortality.
Nurses' Perception of Medication Administration Errors in Benghazi Children Hospital
Authors: Eltarhuni Ainas Salem , Tawfeeq Hajir Omar , El-Abidi Jebril S.
Published: February 2022

Background/Aims:

Medication Administration Errors (MAEs) are a global problem, common among nurses and can threaten all patients' outcomes. Variation of factors makes pediatrics more vulnerable to medication errors (MEs) and its consequences. Therefore, his study aimed to explore the perspective of pediatric nurses regarding the types, causes of errors, and barriers of reporting errors.

Methods:

A descriptive, cross-sectional study carried out between January and May 2021. A self-administered was the instrument for the study, distributed to 150 nurses working in Benghazi Children Hospital and 102 questionnaires were valid and complete. Data analyses were performed by descriptive statistics, using SPSS.

Results:

Administering medication at a wrong time was the most common type of error, followed by wrong rate (62.8% and 47.1%), respectively. The most frequently identified causative factors of MEs were a shortage of nurse staffing compared to the number of patients 76.4% and workload 73.5%. The majority of nurses did not report any MEs, the reasons for not reporting was 46.1% of nurses fear of concentration of personal more than error and 34.3% of them not sure when should report the MEs.

Conclusion:

MEs are a common problem in the health system. Therefore, this study recommended that strategies to eliminate MEs are required, create blame-free environment for reporting, and encouraging an effective communication.
Malaria in Illegal Immigrants in Southern Libya
Authors: Mahanay Fadwa J. , Bashein Abdulla M. , EI-Buni Abdulnasser A. , Sheebah Almabrouk , Annajar Badereddin B.
Published: February 2022

Background and Aims:

The risk of malaria re-introduction to Libya is increasing due to immigration to Libya from sub-Saharan countries where malaria is endemic. This study was conducted to investigate the prevalence of malaria-positive cases among illegal immigrants in the southern region of Libya.

Materials and Methods:

Three hundred and three illegal immigrants, with a mean age of 25.78 ± 5.92 years, from 12 different countries were included. An enzyme-linked immunosorbent assay was used to detect the presence of serum malaria antibodies.

Results:

One hundred and ninety-five (64.36%) of the participants tested positive for malaria antibodies. One hundred and seventy-two of the positive cases arrived in Libya within 1–10 months. The highest number of positive cases (70) came from Ghana, followed by (40) from Niger and (39) from Bangladesh.

Conclusion:

Illegal immigration issue should be treated urgently, combined by increasing the surveillance activities of infectious diseases to prevent malaria re-introduction to Libya.
Prevalence and Clinical Features of Deviated Nasal Septum in the Pediatric Age Group in Najran Region, Saudi Arabia
Authors: Alshehri  , Abdullah Ali
Published: March 2022

Background:

The aim of this study is to evaluate the prevalence and clinical features of deviated nasal septum (DNS) among children under 14 years of age from the Najran region of Saudi Arabia.

Materials and Methods:

One thousand six hundred and eighty-one patients under 14 years of age were evaluated for DNS. They were divided into five age subgroups of <28 days, 29 days-3 years, 3–6 years, 6–12 years, and 12–14 years. The type of DNS according to Guyuron's classification and associated clinical features were recorded for each patient.

Results:

Nine hundred and ninety-one (59%) pediatric patients had DNS. Most DNS was found in the 12–14 years group (41%) and least in the <28 days group (9%). Class 1 DNS was maximum in the overall sample, <28 days and 29 days-3 years group. Class 2 DNS was maximum in 3–6 years and 6–12 years group. Class 6 DNS was maximum in the 12–14 years group. Statistically significant difference (P < 0.05) was found between <28 days and 6–12 years, <28 days to 12–14 years, 29 days-3 years to 12–14 years, and 3–6 years to 12–14 years age groups. Clinically in the overall sample, 66.3% had nasal obstruction, 35.6% had nasal discharge, 30.4% had external deformity, 15.5% had rhinitis, 12.6% had pain or headache, 12.34% had sore throat, and 11.6% had snoring.

Conclusion:

We found that 59% of the pediatric Najran population has DNS. Class I is the most common deformity and the incidence of DNS increases with age. Nasal obstruction and nasal discharge are the most common clinical features associated with DNS.
Задача Римана-Гильберта и $N$-солитонные решения обобщенного смешанного
нелинейного уравнения Шредингера
Authors: Qiu Deqin , Lv Cong
Published: February 2022

Метод задачи Римана-Гильберта применяется к обобщенному смешанному нелинейному уравнению Шредингера с целью получения нового явного $N$-солитонного решения, которое выражается через отношение определителя порядка $(N+1)\times(N+1)$ к определителю порядка $N\times N$. С помощью асимптотического анализа и с использованием свойства определителя Коши получен вывод о простом упругом взаимодействии $N$-солитонов.
Интегрирование дифференциально-разностного уравнения синус-Гордон с самосогласованным источником
Authors: Babajanov Bazar Atajanovich , Babadjanova Aygul Kamiljanovna , Azamatov Azizbek Shavkatovich
Published: February 2022

Метод обратной задачи рассеяния применяется для интегрирования дифференциально-разностного уравнения синус-Гордон с самосогласованным источником.
Дискретное уравнение Абловица-Каупа-Ньюэлла-Сигура второго порядка и его модификация
Authors: Zhang Shuai , Zhao Songlin , Shi Ying
Published: February 2022

Предложен метод обобщенных матриц Коши и построено дискретное уравнение Абловица-Каупа-Ньюэлла-Сигура второго порядка с помощью введения сдвиговых соотношений, которым удовлетворяет матрица $\boldsymbol{r}$. Получена модифицированная форма этого уравнения. Путем перехода к соответствующему косонепрерывному пределу получены полудискретные аналоги для двух указанных дискретных уравнений, также получены непрерывные нелинейные уравнения путем перехода к полному непрерывному пределу. Предложены решения построенных дискретного, полудискретного и непрерывного уравнений типа Абловица-Каупа-Ньюэлла-Сигура, включая солитонные решения, блочно-жордановы решения и смешанные решения. Обсуждаются редукции к дискретному, полудискретному и непрерывному нелинейным уравнениям Шредингера и модифицированному нелинейному уравнению Шредингера.
Интегрируемое суперрасширение уравнения $K(-2,-2)$
Authors: Zhou Hanyu , Tian Kai
Published: February 2022

В качестве суперрасширений уравнения $K(-2,-2)$, которое задается как $u_t=\partial_x^3(u^{-2}/2)-\partial_x(2u^{-2})$, предлагаются две системы уравнений, содержащих бозонные и фермионные поля. Для подтверждения интегрируемости этих систем сформулированы соответствующие линейные спектральные задачи, что приводит к бесконечному набору законов сохранения. На основе естественных законов сохранения определяются преобразования взаимности, переводящие одно суперуравнение $K(-2,-2)$ в модифицированное суперуравнение Кортевега-де Фриза, предложенное Купершмидтом, а другое - в суперсимметричное модифицированное уравнение Кортевега-де Фриза. С помощью этих соответствий устанавливаются бигамильтоновы формулировки суперуравнений $K(-2,-2)$.
Переход от функции Вигнера к $s$-упорядоченному распределению в фазовом пространстве посредством канала с гауссовским шумом
Authors: Zhang Yue , Luo Shunlong
Published: February 2022

Различные распределения в фазовом пространстве, от знаменитой функции Вигнера до функции Хусими $Q$ и распределения Глаубера-Сударшана $P$, сыграли интересную и важную роль в подходе фазового пространства к квантовой механике в целом и квантовой оптике в частности. Кэхилл и Глаубер предложили единый подход ко всем этим распределениям, который основан на понятии $s$-упорядоченного распределения в фазовом пространстве. Для прояснения физического смысла параметра $s$ предлагается интерпретировать $s$-упорядоченное распределение в фазовом пространстве как функцию Вигнера состояния на выходе канала с гауссовским шумом. Таким образом раскрывается связь между $s$-упорядоченным распределением в фазовом пространстве и каналом с гауссовским шумом, которая дает физическое понимание этого распределения. В этом контексте параметр $-s/2$ (а не исходный параметр $s$) приобретает смысл параметра гауссовского шума в канале. Объясняется альтернативное представление канала с гауссовским шумом как приготовления калибровочного измерения когерентного состояния. С использованием параметра $s$ вводится легко вычислимый и экспериментально проверяемый количественный показатель оптической неклассичности, доказаны его основные свойства и приведены примеры его вычисления для некоторых типичных состояний. Сформулирован простой и удобный критерий оптической неклассичности в терминах $s$-упорядоченного распределения в фазовом пространстве.
Дисперсионное соотношение в кинетической модели бесстолкновительной плазмы
Authors: Stepin Stanislav Anatol'evich , Tarasov Aleksei Gennad'evich
Published: February 2022

Для уравнения Власова с самосогласованным полем установлена связь дисперсионного соотношения с алгебраическим дополнением Шура генератора соответствующей динамической системы. Получена оценка индекса неустойчивости в терминах преобразования Ганкеля фонового распределения электронов, для определения знака которого применяется метод перевала.
Единственность системы Полмайера-Лунда-Редже
Authors: Balandin Aleksandr Vladimirovich
Published: February 2022

Доказано, что система Полмайера-Лунда-Редже является с точностью до замены координат единственной двухкомпонентной вариационной системой кирального типа с неприводимой метрикой, допускающей представление Лакса со значениями в алгебре $\mathfrak{so}(3)$.
Крайность трансляционно-инвариантных мер Гиббса для $\lambda$-модели на бинарном дереве Кэли
Authors: Mukhamedov Farrukh Maksutovich , Rahmatullaev Muzaffar Muhammadjanovich , Rasulova Mukhayo Akbarzhon kizi
Published: February 2022

Рассматривается $\lambda$-модель на дереве Кэли порядка $k=2$. При некоторых условиях на вид функции $\lambda$ изучаются трансляционно-инвариантные меры Гиббса и исследуется, при каких условиях они являются или не являются крайними в множестве всех мер Гиббса.
Validation of Near InfraRed preconcentration strategies for ore sorting
Authors: Iyakwari S. , Glass H. J. , Rollinson G. K. , Umbugadu A. A. , Opaluwa O. D. , Frankie B. O.
Published: February 2022

The early rejection of gangue minerals, at coarse ore particles size (preconcentration), has been shown to be a viable option to cost reduction in many mineral processing applications. A promising technique being explored for efficient ore preconcentration is the Near InfraRed (NIR) spectroscopy. This paper attempts to validate the efficiency of near infrared preconcentration strategies, by comparing data of preconcentrated particles, when particles are scanned using near line scanner from different sides and angle of view. Three copper particles were selected from a batch of sixty preconcentrated samples, mineralogical and near infrared analysis were performed on the particles. Particles were then cut laterally (cross sectioned) and mineralogical and near infrared analysis repeated on the cut cross sectioned surface. Data of the whole samples and cross-sectioned samples are compared. Results indicate that the depth attained by scanning (both with NIR and QEMSCAN(R) of original samples is representative of each sample scanned and sufficient for preconcentration. Also, except for the differences in particle size, correlation is almost 1:1, thus, validating the initial NIR preconcentration results as being promising.
Effect of Time on the Syntheses of Carbon Nanotubes via Domestic Oven
Authors: Kure N. , Daniel I. H , Hamidon N. M , Lakin I. I , Machu B. U , Adoyi E. J
Published: February 2022

In this study, carbon nanotubes (CNTs) were synthesized directly on coated silicon substrate via commercial microwave oven at 2.45 GHzf for3 minutes (Sample A) and 4 minutes (Sample B). The plasma provides the required temperature for catalytic decomposition of carbon source (polyethylene) at 750 ?C under atmospheric pressure. Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscope (HRTEM), X-ray diffractometer (XRD) techniques are used to characterize the as-synthesized. Results indicate that, the calculated carbon quality was found to be 1.01 and 1.02 for sample A and sample B respectively with average diameter range of (6.0 to 10.0) ± 0.5 nm. The high intensity ratio is attributed to the defect mode in the CNTs. Also, the analysis from FESEM shows twisted and randomly oriented structures with an interlayer spacing of about 0.35 nm in the internal structure of most CNTs. HRTEM further confirmed the interlayer spacing of about 0.35 nm corresponding to FESEM result. The crystallinity of the CNTs was obtained via X-ray diffraction techniques. Lastly, the results indicate sample A and B produces CNTs, with sample B having more graphitic structure than sample A due to duration of synthesis process.
Higher order Motional Resonances Spectra of electrons with Non-linear Axial Oscillations in Quadrupole Penning trap
Authors: Dyavappa B. M.
Published: February 2022

Experimentally the motional resonances spectra of an electron cloud confined in a quadrupole Penning trap, weakly excited with RF field, which is swept from 1 MHz to 1 GHz was examined. The higher order motional resonances of the electron cloud with non-linear axial oscillations show that they result from couplings in the motional degrees of freedom, which characterize the perturbations in the trap, and cause loss of electrons from the trap. The likely presence of perturbative terms of quadrupole potential is identified by studying the motional resonances spectra and hence the multipole terms are calculated. A periodically forced barrel spring with a steel ball at the free end can be regarded as a model of non-linear oscillator and a periodically forced steel ball hung through a flexible rod, which is deflected alternately toward the two magnets can be regarded as a mechanical model of Duffing oscillator are developed, in analogy to observed higher order motional resonances of the electron cloud excited with different RF field powers.
Influence of Precursor Temperature on Bi Doped ZnSe Material via Electrochemical Deposition Technique for Photovoltaic Application
Authors: Ikhioya Imosobomeh L. , Danladi Eli , Nnanyere Okoli D. , Salawu Abdulazeez O.
Published: February 2022

In this study, Bismuth (Bi) doped ZnSe thin films were deposited on conducting glass substrates by electrochemical deposition technique and the influence of precursor temperature (room, 50, 55, 60 oC) on their optical and structural properties were systematically studied using the combined effect of X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and UV-VIS spectrophotometer. The XRD patterns show a face-centred cubic structure indexed with peaks at (220), (221) and (300). The grain size was in the range of 3.24056 to 4.60481 nm with a lattice constant of 7.189Å. The material deposited at room, 500C, 550C, and 600C reveals agglomeration of particle on the surface of the substrate indicating uniform deposition. The optical spectra show that at different temperature (say room, 50oC, 55oC and 60oC), the absorbance and reflectance of BiZnSe thin films decreases with increase in wavelength of the incident radiation while the transmittance shows direct proportionality with the increase in wavelength. The bandgap demonstrated an increase in the range 1.75-2.25 eV with increase in temperature.
Analysis of Hydromagnetic Double Exothermic Chemical Reactive Flow with Convective Cooling through a Porous Medium under Bimolecular Kinetics
Authors: Akinpelu F. O. , Oderinu R. A. , Ohaegbue A. D.
Published: February 2022

In this study, the analytical solution of steady hydromagnetic double exothermic combustible reaction fluid flow in a porous medium with convective cooling wall is presented. The viscous heating reactive liquid is totaling exothermic without consumption of material. The combustion reaction of the fluid takes place in a Poiseuille device, and it is been propelled by pressure gradient and pre-exponential bimolecular kinetics. The device is exposed to convective cooling to keep the reactive hydromagnetic fluid from distortion. The weighted residual method (WRM) is analytically used to get the numerical values for the dimensionless nonlinear governing equations. The solution to temperature and velocity distribution is carried out and the result is graphically depicted. The Nusselt number and skin friction coefficient is also showed for some significant parameters engrained in the flow and the solution obtained is compared with numerical method. As obtained in the study, the second exothermic reaction term increases the combustion process; hence the term will assist in reducing toxic discharge from the engines that pollute the environment. The Frank-Kamenetskii parameter contributes highly to system thermo-fluid destruction; as such it must be monitored.
Comparative Non-government-based Cryptocurrencies Policy between Thailand and Argentina
Authors: Gohwong Srirath
Published: February 2022

The objective in this study were to study the state of the art of Non-government-based cryptocurrency public policy in Thailand, to study the state of the art of Non-government-based cryptocurrency public policy in Argentina, to compare non-government-based cryptocurrency public policy between Thailand and Argentina, and to discuss implications for both Thailand and Argentina. Documentary research was employed in this study. The findings showed that Thailand and Argentina used a set of policy instruments and blockchain as a financial innovation in order to promote their political equilibriums. The comparison of non-government-based cryptocurrency public policy between Thailand and Argentina was conducted in four issues – scope, policy instrument, distribution, and restraints and innovation. In addition, both countries used both active and passive measures in order to maintain the stability of their political systems.
Examining Indonesian Government Strategies in the Aviation Sector Post Covid-19 Pandemic
Authors: Adjie Hanna Khairunnisa , Bahari Diana Mutiara
Published: February 2022

Aviation is an inseparable part of transportation in any country. The aviation sector is one of the sectors most affected by the Covid-19 pandemic. Indirectly, the spread of the Covid-19 virus can occur in airlines, which are the fast transportation options for passengers. Indonesia has taken a policy to stop its aviation sector from reducing the spread of the Covid-19 virus and prioritize the health of its citizens. The drastically reduced flight frequency without clarity of time impacts many losses to the aviation industry. The Indonesian government plans a gradual recovery effort in the aviation sector through domestic flights. However, there are concerns from the Indonesian people, as airline passengers who will be traveling, regarding their health safety on flights during the large-scale social distancing period during the Covid-19 pandemic. Therefore, this study will discuss the strategies of the Indonesian government in the aviation sector after the Covid-19 pandemic to still prioritize the health of its citizens. This study uses the theory of the foreign policy decision-making process. The method used in this study is a qualitative based research method. This study concludes that the strategies taken by the Indonesian government include reducing 50% of passenger capacity to enforce safe distances, sanitizing aircraft, and for prospective passengers to be required to show a certificate of negative Covid-19 results through a PCR swab test or GeNose C19.
Pengembangan Media Monopoli Aksara Jawa Untuk Pembelajaran Membaca Aksara Jawa Di Sekolah Dasar
Authors: Joko Widodo Bangkit , ‘Arifatul Hanifah Binti
Published: March 2022

Media pembelajaran sangat dibutuhkan dalam menunjang kegiatan pembelajaran di Sekolah Dasar. Media pembelajaran adalah alat atau sarana untuk meningkatkan kegiatan pembelajaran yang berfungsi untuk memperjelas makna pesan yang disampaikan, sehingga dapat mencapai tujuan dari pembelajaran dengan baik. Penelitian ini bertujuan untuk mengetahui efektifitas pengembangan Media Monopoli Aksara Jawa Sekolah Dasar.Penelitian media pembelajaran monopoli aksara Jawa untuk pembelajaran membaca siswa ini merupakan jenis penelitian Research and Defelopment (R&D). Penelitian pengembangan ini menggunakan prosedur pengembangan Borg and Gall. Pengembangan media pembelajaran monopoli aksara Jawa untuk pembelajaran membaca aksara Jawa siswa kelas III SD layak mendukung pembelajaran karena telah teruji kevalidan dan kefektifannya. Uji kevalidan dilakukan oleh tiga ahli. Uji keefektifan dilakukan dengan uji T-test dan angket respon siswa. Dari hasil kedua uji tersebut media monopoli aksara Jawa lebih efektif dibanding dengan tabel aksara Jawab yang sudah ada. Hasil dari perhitungan soal pretest dan posttest dengan rata-rata dari 9 siswa kelas III SDN Cermo 01 diatas KKM yaitu 85% dan hasil angket respon siswa sebesar 88%. Dengan demikian media pembelajaran monopoli aksara Jawa dapat meningkatkan kemampuan membaca aksara Jawa siswa
PARAMETER SELECTION OF FOUR-CYLINDER DIESEL TORSIONAL VIBRATION DAMPERS
Authors:   OJSC “MINSK MOTOR PLANT” Holding Managing Company”, KLESSO Mikhail A.
Published: March 2022

Torsional vibration dampers in modern internal combustion engines are used to reduce alternating shear stresses leading to fatigue failure of the crankshaft, as well as to diagnose the crankshaft, reduce oil consumption, increase the mechanical efficiency of the engine, and reduce noise. Torsional vibration dampers are suggested to be used at OJSC “MINSK MOTOR PLANT” Holding Managing Company” to improve the technical level of four-cylinder diesel engines. Damper parameters choice is based on torsional system model research, which is equivalent to the torsional diesel system of a 4ЧН (4ChN) 11×12.5 diesel engine. The amplitudes of the crankshaft nose torsional vibrations with the engine running are calculated according to the full-load curve. It was found that the maximum amplitude of vibrations corresponds to the diesel engine operation at a rated speed of 1000 rpm. In this case the amplitude of twisting of the crankshaft nose is 0.123 deg. For this diesel engine operating mode, the moment of inertia of the liquid damper flywheel and the damping coefficient were determined. They ensure a decrease in the torsional vibrations amplitude by more than three times. The calculation determined the expected decrease in the torsional vibrations amplitude for other modes of engine operation according to the full-load curve. In the entire research of crankshaft rated speed, the amplitude of nose torsional vibrations when using a damper is three times lower than without it. For experimental refinement of the damper parameters, a damper design with a variable moment of the flywheel inertia, as well as the possibility of replacing the polymethylsiloxane fluid are proposed.
INNOVATIVE DEVELOPMENTS OF THE NATIONAL ACADEMY OF SCIENCES OF BELARUS IN THE FIELD OF DRIVE MECHANICS. PART 1. MODEL APPROACH AND APPLICATION OF DIGITAL TWINS
Authors:   Joint Institute of Mechanical Engineering of the NAS of Belarus, PODDUBKO Sergey N. , ALGIN Vladimir B. ,   Joint Institute of Mechanical Engineering of the NAS of Belarus, ISHIN Nikolay N. ,   Joint Institute of Mechanical Engineering of the NAS of Belarus, SHIL’KO Sergey V. ,   V.A. Belyi Metal Polymer Research Institute of the NAS of Belarus
Published: March 2022

The article considers innovative developments in the field of drive mechanics of the Joint Institute of Mechanical Engineering of the NAS of Belarus in cooperation with the V.A. Belyi Metal Polymer Research Institute of the NAS of Belarus and other organizations. The main attention is paid to the results noted in the TOP-10 competition of the NAS of Belarus, in which the creative team of specialists of the Joint Institute of Mechanical Engineering of the NAS of Belarus and the V.A. Belyi Metal Polymer Research Institute of the NAS of Belarus became the winner, as well as the monograph “Gears and transmissions in Belarus: design, technology, evaluation of properties”, which became a prize-winner in the All-Russian competition named after Ivan Fedorov with international participation in 2020 in the nomination for the best publication on research work. New results obtained by the authors in 2020–2021 on the subject under consideration are also presented. The article includes the provisions of the “Industry 4.0” concept with an emphasis on the model approach and the use of digital twins of materials and products, the provisions of the lifetime mechanics of machines developed at the Joint Institute of Mechanical Engineering of the NAS of Belarus, and the developed architectonics of the drive information model.
APPLICATION OF HIL TECHNOLOGIES IN DEVELOPING AN ALGORITHM FOR SUPPRESSING LONGITUDINAL AND ANGULAR VIBRATIONS OF A MINING DUMP TRUCK
Authors:   Joint Institute of Mechanical Engineering of the NAS of Belarus, KHITRIKOV Sergey V. , VYGONNY Albert G. ,   Joint Institute of Mechanical Engineering of the NAS of Belarus, KRAUCHONAK Aliaksandr L. ,   Joint Institute of Mechanical Engineering of the NAS of Belarus, SHVETS Dzmitry A. ,   Joint Institute of Mechanical Engineering of the NAS of Belarus, POTOTURKO Aliaksandr Yu. ,   OJSC “BELAZ” — Management Company of Holding “BELAZ-HOLDING”
Published: March 2022

The paper considers the use of HIL technology for testing and debugging the algorithm for damping longitudinal ad angular vibrations of a mining dump truck. Using a computer dynamic model of the mining dump truck, the proposed algorithm for damping longitudinal and angular vibrations has been tested for cases of movement on roads with different characteristics of the micro-profile. The efficiency of functioning of the developed algorithm of longitudinal and angular oscillations and the possibility of reducing the oscillation amplitude in the dump truck cabin by 20 % have been confirmed. A semi-natural bench has been formed for testing and debugging the software of the longitudinal and angular vibration damping system. For the on-board controller of the dump truck, software has been developed that implements the control of the brake system according to the proposed algorithm for damping longitudinal and angular vibrations.
IMPLEMENTASI ALGORITMA SENTENCE SIMILARITY TERHADAP CHATBOT SEPUTAR AMIKOM
Authors:   Universitas AMIKOM Yogyakarta, Rizaldhi Dicky Andhika , Rosyad Galih Adhi Kuncoro , Hartanto Anggit Dwi
Published: February 2022

Sebuah informasi merupakan suatu hal yang sangat penting terhadap manusia dalam mengetahui masalah ataupun situasi yang ada. Kecepatan dalam mendapatkan sebuah informasi memudahkan seseorang untuk menyelesaikan maupun mengantisipasi dalam kondisi yang ada. Sebuah informasi yang akurat sangat dibutuhkan dalam kehidupan manusia, dengan adanya perkembangan teknologi yang semakin berkembang penyampaian informasi dapat disebarkan dengan berbagai macam cara. Salah satunya adalah dengan Chatbot yang menggunakan algoritma Sentence Similarity, dimana dengan algoritma ini dapat mengumpulkan informasi berdasarkan pengelompokan kata maupun kalimat secara akurat, karena algoritma ini memiliki tingkat keakuratan yang sangat tinggi. Selain itu banyaknya pola kata/kalimat yang terkumpul dan telah disimpan membuat chatbot memiliki keakurasian yang lebih baik.
KARYAWAN CU (CREDIT UNION) PANCUR KASIH MENGHADAPI TANTANGAN REFORMASI LAYANAN MELALUI TRANSFORMASI TEKNOLOGI INFORMASI DIGITAL
Authors:   Universitas Tanjungpura, Dwitanto Joko
Published: February 2022

Penggunaan teknologi informasi dalam berbagai bidang kehidupan saat ini tidak terhindarkan lagi, sehingga suka tidak suka, siap atau tidak siap hal ini harus dihadapi termasuk kemampuan dan kesiapan dalam menghadapai perubahan yang terjadi. Sumber daya manusia terkena imbasnya atas perubahan tersebut sehingga SDM harus mampu dan mau meng-update diri. Teknologi dan SDM harus berjalan beriringan agar tidak ada gap yang terlampau jauh sehingga penerapan teknologi pada organisasi dapat dengan mudah dilakukan karena akan berdampak pada eksistensi organisasi secara keseluruhan terutama berkaitan dengan aktivitas pelayanan yang berkaitan dengan orang banyak. Metode penelitian ini dilakukan dengan descriptive/naratif research. Sampel karyawan CUPK berjumlah 30 orang plus anggota CUPK sebanyak 10 orang. Teknik pengumpulan data berdasarkan persepsi yang disampaikan oleh responden melalui wawancara. Dari hasil wawancara menyimpulkan bahwa semua responden memiliki persepsi yang sama bahwa teknologi informasi berbasis online dapat meningkatkan kinerja karyawan dan mereka merasa siap menghadapi perubahan dan peralihan sistem kerja berbasis teknologi informasi digital dalam memberikan pelayanan terbaik pada anggota CUPK.
WEB STORAGE BERBASIS PRIVATE CLOUD MENGGUNAKAN ENKRIPSI SHA1 PADA GBKP KM 8 PADANG BULAN MEDAN
Authors:   Universitas Methodist Indonesia, Larosa Fati Gratianus Nafiri , Naibaho Jimmy F. , Tarigan Romeo Mamanta
Published: February 2022

GBKP km 8 Padang Bulan Medan mempunyai kendala dalam memonitor, mengatur, dan mengelola data secara cepat, efektif dan efisien, yang selama ini masih bersifat konvensional sehingga mengakibatkan tingginya biaya operasional. Pembangunan aplikasi web storage berbasis private cloud, dimaksudkan untuk menjawab kesulitan di atas. Konsep private cloud computing harus mengedepankan faktor keamanan file-file yang disimpan pada server private cloud tersebut dengan menggunakan salah satu algoritma yakni SHA1. SHA1 digunakan sebagai autentikasi, integritas dan digital signature. Akses terhadap web storage melalui koneksi intranet secara Local Area Network.