bluuebunny/crossref_metadata_2025 huggingface dataset:
Rare Time Series of Hydrothermal Fluids for a Submarine Volcano: 14 Years of Vent Fluid Compositions for Brothers Volcano, Kermadec Arc, New Zealand
Authors: Stucker V. K. , de Ronde C.E.J. , Laurence K. J. , Phillips A. M.
Published: June 2022

Hydrothermal vent fluids from Brothers submarine arc volcano were previously collected in 2004, 2005, and 2017. We present new data from 2018 along with a unique time series of a submarine volcano hosting two distinct types of hydrothermal venting to better understand subsurface processes and how they evolve over time. Samples were collected from known venting locations along the NW Caldera, the Upper and Lower Cone sites, and the newly sampled Upper Caldera site. The NW Caldera wall and Upper Caldera vent fluid compositions are controlled by high-temperature water-rock interactions and phase separation between 2004 and 2018. Fe/Mn molar values suggest that the magmatic impact on all fields has been increasing over time. The Upper Cone has varying influences, including short-term pulses of magmatic degassing, as revealed in K-Mg-SO4 ternary diagrams, Fe/Mn values, and δD and δ18O data. The Lower Cone is dominated by low temperatures and CO2 degassing and shows a pulse in magmatic influence in 2017, followed by a decrease toward earlier conditions in 2018. The 2017 pulse was accompanied by the increase of an enigmatic, soluble MgSO4 phase, potentially due to the “mining” of a magmatic brine sequestered inside the cone. Stable isotope data across the sites indicate pulses of magmatic waters in 2004 and 2017, immediately followed by episodes of more seawater-dominated fluids in 2005 and 2018. Magmatic degassing, phase separation, permeability, and mineral solubility all strongly influence changes in vent fluid composition. This study highlights the dynamic nature of the Brothers volcano hydrothermal system and the changes in fluid chemistry that may affect resultant mineralization.
Pengaruh Kualitas Pelayanan, Harga, Dan Kepercayaan Terhadap Kepuasan Pelanggan Cherry Pet Shop Purwokerto
Authors: Budiyono Rokhmad , Sarbullah Sarbullah , Kuswiyono Arini Novandalina
Published: June 2022

Cherry Pet Shop adalah perusahaan retail yang menjual berbagai macam kebutuhan hewan peliharaan seperti makanan, asesoris, snack, shampo dan obat kutu. Selain menjual kebutuhan untuk hewan, Cherry Pet Shop juga tersedia pelayanan kesehatan hewan yang langsung ditangani oleh dokter  hewan dan juga menyediakan jasa grooming, dan jasa penitipan untuk hewan. Tujuan dari penelitian ini yaitu untuk mengetahui pengaruh kualitas pelayanan, harga dan kepercayaan terhadap kepuasan pelanggan produk jasa Cherry Pet Shop Purwokerto. Penelitian ini merupakan penelitian kuantitatif. Populasi dalam penelitan ini seluruh pelanggan Cherry Pet Shop Purwokerto yang tidak terhingga atau tidak bisa ditentukan. Dalam penelitian ini sampel diambil dengan cara nonprobability sampling yaitu dengan teknik accidental sampling. Jumlah responden dalam penelitian ini adalah sebanyak 103 orang responden. Pengumpulan data yang digunakan dalam penelitian ini adalah dengan menggunakan kuesioner. Sedangkan alat analisis dalam penelitan ini menggunakan analisis regresi berganda menggunakan software SPSS. Berdasarkan analisis data menunjukan bahwa: kualitas pelayanan berpengaruh terhadap kepuasan pelanggan, harga tidak berpengaruh kepuasan pelanggan, kepercayaan berpengaruh terhadap kepuasan pelanggan. Dari hasil analisis data pada penelitian ini maka penulis menyarankan kepada perusahaan untuk dapat terus meningkatkan kualitas pelayanan dan terus mempertahankan kepercayaan pelanggan.
Klasifikasi Jenis Hewan Pada Kebun Binatang Dengan Menggunakan Metode Deep Neural Network
Authors: Nugroho Kristiawan , Murdowo Sugeng
Published: June 2022

Pariwisata merupakan sektor yang sangat penting bagi pemerintah Indonesia, Salah satu bagian dari industri kepariwisataan adalah kebun binatang. Namun dengan semakin banyaknya jumlah kebun binatang di Indonesia pemerintah mengalami kesulitan dalam mengklasifikasikan jenis binatang terutama saat terjadi penambahan hewan baru. Berbagai maca teknologi informasi telah membantu manusia dalam menyelesaikan pekerjaan. Saat ini Machine Learning yang merupakan pendekatan dalam melakukan analisis prediksi terhadap berbagai permasalahan yang dihadapi manusia berkembang dengan pesat. Neural Network merupakan suatu algoritma machine learning yang terbukti tepat dalam memprediksi dan banyak dipergunakan peneliti. Penelitian ini menggunakan Neural Network dalam memprediksi jenis hewan yang ada di kebun binatang sebagai salah satu upaya membantu pemerintah dalam menyediakan informasi yang dibutuhkan. Menggunakan Neural Network diperoleh hasil akurasi sebesar 98% dengan tingkat presisi sebesar 98.1% dan Recall sebesar 98 %.
Sistem Informasi Self Assesment Covid 19 Berbasis Web
Authors: Subianto Subianto
Published: June 2022

Pemantauan kondisi kesehatan terkait dengan kasus Covid-19, sangat perlu dilakukan sebagai langkah pencegahan penularan. Sistem Informasi Self Assesment Covid 19 ini dibangun untuk memudahkan pemantauan secara mandiri, meminimalisir penularan dan sebagai langkah antisipasi terhadap dampak resiko yang lebih besar bagi lingkungan. Untuk meneliti dan mengambil data yang diperlukan peneliti menggunakan metode pengumpulan data wawancara, observasi, dan studi pustaka. Sistem Informasi ini menggunakan perancangan sistem berbasis web online.
TECHNIQUES FOR DETERMINING SIZE AND SHAPE OF DRILL CUTTINGS
Authors: Kern J. G. C. , Montagna G. P. , Borges M. F.
Published: June 2022

In the oil and gas industry, the presence of cuttings during the well drilling stage creates a concerning problem known as erosion. The risks of catastrophic failure caused by erosion in hydraulic systems become even greater (e.g., choke line and MPD) when observing control and safety wells on drilling rigs. The geometric characteristics of the particles are important physical attributes, as they influence the wear mechanisms of the materials directly. Therefore, this work presents an analysis of the methodology used for determining the size and shape of particles. Initially, the collection of samples was obtained by Chute Riffling technique. The samples were tested using vibrating sieves for particle size analysis. The study uses computerized image analysis to determine the particle size distribution, as well as shape parameters. The application of both techniques demonstrates that the image analysis results were very similar to the sieving, even when a much smaller sub-sample is under analysis. The granulometric analysis of the diameter of the drill cuttings by the method of vibratory sieving showed a range of size ranging from 0.10 mm to 3.35 mm, and, by the image analysis, it showed a range of size going from 0.11mm to 4.2mm. The shape parameters of the majority of drill cuttings analyzed in the present work was classified as “high circularity” and “well-rounded.”
C21: Parcours de soins des patients atteints de cancer du sein à l'unité de sénologie du CHU Aristide le Dantec de Dakar (Sénégal)
Authors: Gueye S M K , Diallo B S , Guèye M , Mbodji A , Diallo M
Published: June 2022

INTRODUCTION : Evaluer les délais des différentes étapes du parcours de soins jusqu’à l’accès au traitement initial des cancers du sein suivis à l’Unité de Sénologie du Centre Hospitalo-Universitaire (CHU) Aristide le Dantec de Dakar. MATERIELS ET METHODES : Il s’agissait d’une étude descriptive, rétrospective et analytique portant sur les patients dont le diagnostic de cancer du sein était confirmé et suivis à l’Unité de Sénologie du CHU Aristide le Dantec de Dakar. Durant une période de trois ans, allant du 1er Janvier 2013 au 31 Décembre 2015, nous avons étudié pour tous les patients, le délai de chaque étape du parcours diagnostique et thérapeutique et l'évolution de la maladie avec un recul minimal de cinq ans au 31 Décembre 2020. RESULTATS : Cent soixante-dix-huit patients étaient inclus dans cette étude. Le délai moyen d’accès à l’Unité de Sénologie depuis les premiers symptômes du cancer était de 10,6 mois avec des extrêmes de sept jours et 121,7 mois ; celui de la confirmation du diagnostic après le premier contact était de 36,1 jours avec un minimum d’un jour et un maximum de 34,3 mois.  Après le diagnostic, le délai moyen de l'évaluation en vue d'une décision du traitement initial était de 23,3 jours (d’un jour à 28,3 mois) et celui de la mise en œuvre effective du traitement initial était de 7,3 jours avec des extrêmes d’un jour à 87 jours ; après décision. En somme, le délai global d’accès au traitement initial d’un cancer du sein depuis les premiers symptômes jusqu'au premier acte thérapeutique était en moyenne de 13,2 mois (de 47 jours à 122 mois). L’impact pronostique de ces retards de prise en charge se résume en un taux de décès de 55,1% ; tous stades confondus, avec une survie à cinq ans qui ne dépasse guère 35,6%. CONCLUSION : Ces résultats montrent que les efforts devront surtout porter sur la première étape (accès à l’Unité) ; au niveau communautaire, en réduisant les facteurs limitant la prise de décision de consulter. Ensuite, une fois le premier contact établi, l’accent doit être mis sur l’amélioration de l’accessibilité (géographique et financière) et sur la disponibilité et la fonctionnalité des services d’aide au diagnostic y compris l’évaluation pré-thérapeutique.
C29: Aspects diagnostiques, pronostiques et évolutifs de la leucémie lymphoïde chronique au service d’Hématologie Clinique du CHN de Dalal Jamm de 2018 à 2020
Authors: Fall Dieng S , Ndiaye A , Niang E H D , Camara M L T , Sarr K , Dakono A , Sall A , Ndiaye F S D
Published: June 2022

INTRODUCTION : La leucémie lymphoïde chronique (LLC) est une néoplasie lymphoïde mature B et le syndrome lymphoprolifératif chronique le plus fréquent chez l’adulte. Les objectifs étaient d'analyser les aspects épidémiologiques, diagnostiques, pronostiques et évolutifs observés dans nos pratiques de prise en charge de la LLC. MATERIELS ET METHODES : Une étude rétrospective (1er Janvier 2018 au 3 Juillet 2020), descriptive menée au service d’Hématologie Clinique de l’Hôpital Dalal Jamm, a inclus les patients suivis pour une LLC confirmée par l’immunophénotypage (score de Matutes ≥4). Les aspects socio-épidémiologiques, cliniques, paracliniques, thérapeutiques et évolutifs ont été analysés. RESULTATS : Nous avons colligé 31 dossiers de 20 hommes et 11 femmes qui avaient un âge moyen de 61,96 ± 10,03 ans. Les circonstances révélatrices étaient le syndrome tumoral dans 51,6 % des cas et l’hyperlymphocytose dans 29,03% des cas. Une comorbidité était notée dans 29,03% des cas. L’hémogramme montrait un taux moyen de globules blancs à 184 ± 83,8 G/l, de lymphocytose à 183 ± 54,8 G/l, d’hémoglobine 9,3 ± 2,5 g/dl et de plaquettes à 182,8 ± 107,6 G/L. Les malades avaient une anémie hémolytique auto-immune dans 16% des cas associée à une thrombopénie auto-immune dans 6,5% et une hypo-gammaglobulinémie dans 33,3% des cas.  Sur le plan pronostic, les malades étaient au stade avancé dans 80,64% des cas (Binet B et C) et le CD38 était exprimé dans 22,58% des cas. Des anomalies cytogénétiques additionnelles ont été notées dans 32,25% des cas (délétion 13q : quatre cas, trisomie 12 :  deux cas, double délétion : deux cas).  Sur le plan thérapeutique, 26 patients étaient éligibles au traitement dont 30,7% sous protocole chloraminophène, 30,7% sous CHOP, 11,5% sous RCHOP et 12,9% sous RFC.  La rémission complète n’avait été obtenue que dans 9,6% des cas. CONCLUSION : La LLC demeure une hémopathie maligne du sujet âgé, révélée le plus souvent à un stade avancé de la maladie par le syndrome tumoral. La non disponibilité des thérapies innovantes constitue un frein dans sa prise en charge, ce qui grève la survie des patients.
C30: Facteurs pronostiques initiaux et résultats du traitement des lymphomes non hodgkiniens à Dakar
Authors: Ndiaye A , Niang E H D , Faye B F , Fall S , Seck M , Touré S A , Sarr K , Camara M L , Camara M L , Disongo I , Lontsi E , Motassi E , Ndiaye F S D , Diop S
Published: June 2022

INTRODUCTION : La prise en charge des lymphomes malins non hodgkiniens au Sénégal se heurte au manque d’outils d’exploration et à l’inaccessibilité des anticancéreux. L’objectif de ce travail était d’identifier les facteurs pronostiques au diagnostic et d’évaluer leur évolution sous traitement. MATERIELS ET METHODES : Nous avions réalisé une étude prospective du 1er Janvier 2018 au 3 Juillet 2020 portant sur les cas de lymphome non hodgkinien. Les facteurs pronostiques initiaux étaient évalués selon l’index pronostique international pour le lymphome B diffus à grande cellules et les lymphomes T, le Mantle Cell Lymphoma International Prognostic Index et le Follicular lymphoma International Index respectivement pour le lymphome du manteau et les lymphomes à petites cellules. Les lymphomes B diffus à grandes cellules, ceux du manteau et ceux à petites cellules étaient traitée selon le protocole associant cyclophosphamide, doxorubicine, oncovin et prednisone (CHOP) associé ou non au rituximab, les lymphomes T bénéficiaient d’un protocole CHOP. L’évolution a été évaluée sur la réponse au traitement et la survie. L’analyse des données a été effectuée avec le logiciel SPSS (Statistical Package for Sciences Socials) version 18. La courbe de survie de Kaplan Meier a été utilisée pour évaluer la probabilité de survie des patients. La comparaison des probabilités de survie entre les différents groupes était faite à partir du test Log-rank avec un seuil de significativité p<0,05. RESULTATS : Nous avions inclus 40 patients dont 30 hommes et 10 femmes avec un sex-ratio de trois. L’âge moyen des patients était de 43,38 ans (écart type=15,87). Le délai moyen entre le début des symptômes et la confirmation diagnostique était de 7,4 mois. La durée totale du suivi de la cohorte était de 30,5 patient-années. Les lymphomes B représentaient 57,5% des cas, les formes T 27,5% des cas, la forme immuno-phénotypique n’a pas été déterminée dans 15% des cas. Vingt-cinq patients (67,6% des cas) étaient à un stade avancé au diagnostic. Le pronostic initial était défavorable dans 29,7% des cas, tout type histologique confondu. La survie globale à 30 mois était de 70%, celle du lymphome à petites cellules était de 100%, pour le DLBCL et le lymphome à cellules T elle était respectivement de 85% et 55%. Il n'y avait pas de différence de survie selon le sexe, la localité, la profession, le délai avant la consultation ou le diagnostic (p supérieur à 0,5). CONCLUSION : Nos patients étaient reçus à un stade avancé de leur maladie au diagnostic. La survie globale à 30 mois était courte. Un diagnostic précoce et une meilleure accessibilité à l’immuno-chimiothérapie pourraient améliorer ces résultats.
Theoretical Evaluation of Angle-Dependent Optical Properties of a Thin Film Solar Cell Including One-Dimension Photonic Crystals
Authors: ÇETİNKAYA Çağlar
Published: June 2022

The effective use of photonic-based integrated systems, whose optical properties can be tuned through light management engineering in optoelectronic devices, constitutes the backbone of today's technology. Especially in systems such as CdTe-based solar cells with well-known and high efficiency, one-dimensional photonic crystal designs emerge as an effective way to provide an electronic or optical improvement. With this intention, in this study, the optical spectra of the MgF2/MoO3 one-dimensional photonic crystal integrated into the CdTe solar cell to improve photon harvesting were investigated theoretically under both bottom and top illumination according to the incidence angle of the electromagnetic wave. The transfer matrix method was used to calculate the angle dependent optical spectra. Since the electromagnetic wave interacts directly with the photonic crystal, it has been observed that the optical properties are more dependent on the angle under the top illumination compared to the bottom one. For top illumination, up to 30°, there is no significant change in reflection in the photonic band gap, but reflection drops significantly at incidence angles greater than 30°. Also, increasing the angle indicates that the low wavelength tail of the photonic band gap shifts to shorter wavelengths and enters the visible region. In the photonic band gap, for angles greater than 45°, the probability of absorption increases significantly as more electromagnetic waves enter the structure. For the bottom illumination, there is no serious dependence on the angle of incidence. For 75°, there is an increase in reflection for all wavelengths and, therefore, a decrease in absorption.
O aspecto pictórico em “Sunday morning”, de Wallace Stevens
Authors: Funari Alessandro Palermo , Faleiros Álvaro Silveira
Published: June 2022

“Em grande medida, os problemas dos poetas são os problemas dos pintores, e os poetas devem não raro se voltar à literatura da pintura para uma discussão de seus próprios problemas” (Stevens 1957: 187). Assim o poeta moderno estadunidense Wallace Stevens (1879 - 1955) descreve, ele próprio, sua relação com a pintura e seu posicionamento de que as duas artes são quase irremediavelmente conectadas. Ainda que alguns de seus melhores críticos tendam a ignorar essa associação (entre eles estão Harold Bloom, Helen Vendler, Frank Kermode e Eleanor Cook), não é incomum que análises de seus poemas e poética sejam atravessados por essa leitura. Um dos poemas mais explorados nesse sentido é “Sunday Morning” – publicado pela primeira vez em sua obra de estreia, Harmonium, de 1923 –, amplamente louvado como um dos melhores de toda a produção de Stevens. Aqui, além de expor tais leituras, iremos apresentar uma tradução a este poema e propor outras leituras que o relacionem com diversos aspectos da arte pictórica e, em especial, com as naturezas-mortas.
Ergonomia, usabilidade e conforto no vestuário feminino ciclista
Authors: Gomes Onnara Custódio , Faria Bianca Buranello , Menezes Marizilda dos Santos
Published: June 2022

O ciclismo passou a ser praticado por pessoas de todas as camadas sociais, ao final do século XIX, incluindo a participação de mulheres. Esse envolvimento suscitou várias mudanças no comportamento e também no vestuário feminino. Pretendeu-se nesta pesquisa identificar os fatores que proporcionam a usabilidade e o conforto do vestuário feminino ciclista. Pôde-se constatar que as roupas para o segmento esportivo atendem as demandas desse público específico com relação aos princípios de usabilidade e os critérios de conforto.
Defects in a dilapidated building resulting in loss of bearing capacity of supporting structures
Authors: Kazkeyev Alizhan , Kenzhebekov Daniyar , Tattikulov Nursultan
Published: June 2022

This article is devoted to assessing the effectiveness of technical inspection of the condition and the degree of influence of various factors on the reliability of buildings. Technical inspection of the condition of buildings and structures is an important procedure for making decisions about the suitability of the structure for its further operation. Technical inspection should be carried out by specialized accredited organizations that have the necessary expertise and equipment. Adverse environmental factors, poor quality of construction and installation work and general physical deterioration of the building have a direct impact on the safety of people staying in it. The object of the survey was the building of a secondary school in the Karaganda region. Visual and instrumental inspection was carried out at the object, including determination of technical condition and damage categories by shock-pulse method and geodetic surveying. According to the results of the inspection of the object the conclusion of improper condition of the load-bearing structures belonging to category IV, i.e., pre-emergency state of the structures was assigned.
IMPACT OF COVID-19 ON EMPLOYEES AND BUSINESS PERFORMANCE: A STUDY ON MARINE TOURISM MANAGEMENT
Authors: ARLI Erdal , SAYGILI Mehmet Sıtkı
Published: June 2022

The purpose of this study is to indicate the level of effect of the pandemic process of the boating enterprises operating in the field of marine tourism management by the pandemic process both in terms of general business performance and internal factors such as job satisfaction, life satisfaction, occupational burnout and intention to quit job. In order to achieve this goal, data was collected, by survey method, from the enterprises that carry out boat trips. The collected data were analyzed with the SPSS and AMOS SEM program, and the relationship between the business performance variables, which are thought to be affected by the Covid-19 process, and the internal factors of the employees regarding business life, were analyzed. According to the results, the highest level of relationship in business performance was found between profitability and difficulty in finding customers (p= 0.000, r= 0.597) and the highest level of relationship in employee performance was found between motivation and burnout (p= 0.000, r=0.848).
EXAMINATION OF CONTAINER TERMINAL LAYOUT WITH METHOD STUDY
Authors: OKŞAŞ Olgay , KARA Gökhan
Published: June 2022

Container terminals are complex facilities where many operations take place simultaneously. In order to carry out these operations efficiently, terminal layout plans should be designed according to the physical and characteristic features of the terminal. Layout plans can be reconstructed in cases where the existing terminal is expanded or in cases where it is required to increase the productivity of the terminal to manage the increasing container throughput. For strategic decisions and long-term planning, knowing how the layout design revisions would affect the terminal's operation and productivity is critical for terminal managers. One of the most effective methods for increasing productivity in enterprises is the work study. In this direction, to improve terminal productivity, the analysis of the terminal is carried out by using the method study, which is one of the work study techniques. Alternative layouts have been proposed for the terminal layout after a detailed analysis and critical evaluation of terminal movements.
Estimating the Rainfall Patterns in Namibia: Are rainfall patterns a myth or fact?
Authors:   Department of Agricultural Economics, Faculty of Agriculture and Natural Resources, University of Namibia, Sartorius von Bach H J , Kalundu K M ,   Department of Agricultural Economics, Faculty of Agriculture and Natural Resources, University of Namibia
Published: June 2022

Rainfall is generally regarded as the key driver for ecosystem processes, particularly important within the dynamics of semi-arid regions. Since the precipitation impacts the natural environment, human society and the economy, the paper applied rainfall forecasting to avail early warning patterns. The Waterberg rainfall data from 1895 to 2019 was used to determine a better understanding of its pattern. This is necessitated because knowledge of rainfall patterns are required for reviewing production targets and a necessity for decision making in agriculture. Data shows that only 34% of the rainfall years accounted average rainfall, meanwhile 66% of rainfall years is either classified as above or below. Further, results show that the ENSO patterns follow a cyclical pattern, which corresponds to the local Waterberg rainfall. Econometric approaches postulate that there exists volatility of rainfall, effective rainfall, its intensity, cycles and the ENSO data. This paper shows that rainfall forecasting is possible when using a model that takes into account the variation in the ENSO, cyclical pattern and the accumulation of various rainfall cycles. A five year forecast shows that the current experienced drought cycle is coming to an end, and that the prospects of above average years will only persist for 2 years. We recommend that knowledge of the cyclical trend needs to be translated into reliable periodic statements to safeguard Namibia against future famines, possible food shortages and counter rising food prices. Although the methods are robust, they call for further research into the causes of dynamics of observed rainfall variability.
Comparison of Hearing Outcomes in Patients Undergoing Type I Tympanoplasty With Temporalis Fascia Vs Tensor Fascia Lata Graft
Authors: Prasad Shubhangi , Kulothungan Gowtham , Mahajan Gundappa , Dixith Rohan , Pawar Rishikesh , Kakollu Sravya
Published: June 2022

Background: Mucosal type of chronic otitis media is a condition characterized by a central perforation of the tympanic membrane with or without ossicular chain involvement. The perforation is in the pars tensa, and is mostly sequelae to an earlier attack of acute otitis media. The tympanic membrane perforation may be caused by chronic suppurative otitis media (CSOM) or following trauma, mostly resulting in hearing loss. Aim: To compare the hearing outcome in patients undergoing type one tympanoplasty using temporalis fascia versus patients undergoing type one tympanoplasty using fascia lata graft. Method: Patients with mucosal chronic suppurative otitis media were chosen from the OPD or outpatient department of otorhinolaryngology at Dr. DY Patil Hospital; between May 2019 and April 2021. This prospective study includes 50 patients out of which 25 patients were operated for myringoplasty with temporalis fascia and other 25 patients were operated for myringoplasty with fascia lata graft. Pre-operative and post-operative hearing assessment was done by audiometry (AB gap) and improvement in PTA findings were compared. Results: There is a significant improvement in AB gap in patients undergoing type one tympanoplasty with tensor fascia lata as compared to those who underwent the same surgery but with temporalis fascia. Conclusion: As observed by our study, significant improvement in AB gap in patients undergoing type 1 tympanoplasty with tensor fascia lata as compared to those who underwent the same surgery but with temporalis fascia was present. Thus, it can be suggested to perform type one tympanoplasty with tensor fascia lata for better improvement in AB gap.
Abdominal fat distribution and its relationship to sagittal abdominal diameter (SAD) and SAD-height ratio – An analytical cross-sectional study in the South Indian population
Authors: Catherine Precilla , Devanand Viji , Chelladurai Amarnath , Balasubramaniam Suhasini , S Sathishkumar , Nazarene Anto , Vivekkumar Priestly
Published: June 2022

Background: The prevalence of obesity is increasing in developing countries like India. This will place a great burden on the health infrastructure of the country. Early identification and intervention are the keys to managing this important problem. Since Asians tend to have more visceral body fat for any given body mass index (BMI), lower cut-off values have been suggested for different anthropometric parameters. Studies determining the correlation of Sagittal abdominal diameter (SAD) and SAD-height ratio (SADHtR) with total visceral fat volumes measured by computed tomography (CT) scan abdomen quantification are limited in the South Indian population.

Aims and Objectives: This study was conducted with the objectives of measuring BMI, SAD, SADHtR, and comparing the correlation of the measured anthropometric parameters with visceral and subcutaneous abdominal fat volumes measured using CT scan abdomen in both the genders in South Indian population.

Materials and Methods: This analytical cross-sectional study was done in a hospital setting with a sample size of 566 (276 men and 290 women-aged 30–70 years). Weight, height, and BMI were measured. SAD was measured electronically from a CT image at the L4–L5 level. SADHtR was derived. Total abdominal fat volumes, subcutaneous abdominal fat volumes, and visceral abdominal fat volumes were measured in cm3 from the dome of the liver to the pubic symphysis using software for CT-based quantification of fat volumes between −190 and −30 Hounsfield units threshold limits. The data were tabulated and analyzed to compare mean values between men and women and to find the correlation between the anthropometric parameters and visceral fat volume using Pearson’s correlation test.

Results: The difference in mean values of BMI, SAD, and SADHtR between the sexes was statistically significant. SAD showed the highest correlation with visceral fat volume in both genders. BMI showed a higher correlation with subcutaneous adipose tissue volume than with visceral adipose tissue volume.

Conclusion: Both SAD and SADHtR can be used as simple and reproducible anthropometric tools to identify the presence of increased visceral fat volume in both genders in our population.
The Determination of Eigenvalues and Eigenvectors of the Orbital Angular Momentum
Authors: WASMAN Kishwar Mohammed , MAWLUD Saman
Published: June 2022

The theory of angular momentum performance a significant position in the classical and quantum mechanical study of physical properties, such as studies into nuclear, atomic, and molecular processes, as well as other quantum problems, including spherical symmetry. In this analysis, angular momentum operators are described in multiple ways, based on the angular momentum operator's commutator, matrix, and geometric representation, The eigenvalue and eigenvector were also known for operatorsJ ̂_±,J ⃑ ̂^2, J ̂_x,J ̂_y and J ̂_zwithin the |j,┤ ├ m⟩ basis. Furthermore, in quantum mechanics, angular momentum is called quantized variable, meaning that it comes in discrete quantities. In contrast to the macroscopic system case where a continuous variable is angular momentum.
Review of Optoelectronic Properties of ZnO Photodetector
Authors: WASMAN Kishwar Mohammed , HAMADAMEEN Bestoon
Published: June 2022

Photodetection has been gained a lot of attention in last years biased on military wide range and civil application. With essential properties of Zno which has the wide band gap, strong radiation hardness, low cost and good chemical stabilities. ZnO are considered as the most successful candidate for UV photodetector. The study of our report is to review photodetectors based on doped Zno nanostructures and the new advances in ZnO nanostructured generation technique including adjustment and doping methods with modifications of ZnO photodetector. Final part of this review is about literature reviews were reported in recent years about optoelectrical property of Zno nanostructures, due to the fact that Zinc oxide is an important semiconductor material for optoelectronic and industrial applications, such solar cell, photosensors and photodetectors.
Composite Materials Based on UPE Resin and Coffee Husks
Authors: Huynh Nguyen Anh Tuan , Ly Tan Nhiem , Dao Minh Khanh
Published: June 2022

In this work, two series of composite materials based on unsaturated polyester (UPE) resin and coffee husk powder were fabricated by a hot pressing method using methyl ethyl ketone peroxide (MEKP) as an initiator. The gel time of UPE resin is 32 ± 2 min with 0.5 wt % of MEKP was determined according to ASTM D2471. The differential scanning calorimetry (DSC) reveals that the curing process should be post-cured. The composite panels were fabricated with the size of 17x17x4 mm. With a bulk density of 1.35 g/cm3, two series of the composite material with two types of coffee husk sizes in the range of 0.150-0.315 mm (CH1) and 0.315-0.630 mm (CH2) were investigated. In each series, the coffee bean husk content varies by 45, 50, 55, 60, 65, and 70 wt %, respectively. The obtained composite materials were evaluated for mechanical properties such as flexural and tensile strength according to ASTM D790 and D638, respectively.  The results show that the mechanical properties at the reinforcement content of 50% are the best with the flexural strength, flexural modulus, tensile strength and tensile modulus of the CH1 are 8.5, 616.0, 3.9, and 999.8 MPa, respectively. Meanwhile, they are18.7 MPa, 1888.5 MPa, 8.6 MPa, 8.6 MPa, and 1889.0 MPa, respectively for the CH2.
Study on Designing and Manufacturing the Freeze Drying System with the Process of Freezing Moist Materials inside the Freeze Drying Chamber to Preserve Valuable Products
Authors: Nguyen Tan Dzung , Chau Thanh Tuan , Do Thuy Khanh Linh
Published: June 2022

Freeze drying is one of the most advanced drying technologies for food processing and preserving using temperature under 0oC or under the freezing point, and pressure of drying chamber environment under 4.58mmHg to process foods. This method helps to maintain the initial quality of proteins, lipids, carbohydrates, vitamins, bioactive substances and sensory activities… In this study, the calculation and design were carried out to find suitable technology parameters to make the freeze drying system in which the freezing process occurred inside the freeze drying chamber. Heat was transferred by short wavelength thermal radiation, l = 50´10-3 m. As a result, time of freeze drying had been shortened to 13.33h/batch. The system was successfully manufactured, showed the steadily working, producing the high quality products, and reduced products price. In the conditions of Vietnam, the freeze drying system replacing that of other countries is the indispensable factor to apply for processing and preserving foods.
An Applied Research of the Recycled Economic Model for Spirulina Algae’s Cultivation from Ion-Life Alkaline Water and 〖CO〗_2 Gas’s Boiler
Authors: Trinh Dung , Nguyen Truc Mai , Vo Dang Linh , Pham Hung
Published: June 2022

This paper presents an investigation of Spirulina algae (S. platensis) cultivation from the research and application of the circular economy model for green production by combining Ion-Life alkaline water and the  gas emitted from the combustion of rice husk. This circular economy model for green production is applied in using the optimal pH values and the in which S. platensis is much easier for using. The cost of prepared medium for S. platensis cultivation from the Ion-Life alkaline water is minimized thanks to the simplex algorithm. From this algorithm, the cost prepared medium for S. platensis cultivation from the Ion-Life alkaline water can be reduced approximately 71.86 VND/liter when comparing to the Zarrouk medium (nearly equal to 3.71 % of the cost for cultivation from the Zarrouk medium). Comparing the improved medium from Ion-Life alkaline water with the Zarrouk medium for cultivating S.platensis alge are at the same conditions as the temperature from 26 ¸ 40oC and pH value from 8.6 ¸ 10.6. During the first eight days of cultivation in improved medium from Ion-Life alkaline water, the concentration of biomass increases from 0.044 to 0.93 g/L. During the next eight days, the pH values are controlled to be from 8.5 to 9.5, which is suitable for Spirulina algae since feeding the  gas from the combustion of rice husk with amount of 7.6 %  with the 30 minutes a day. Finding a technology that blows  from smoke of boiler to make the effect of stirring the environment for achieving objectives. First, it helps to add carbon-nutrient source in the form of  . Second, it helps to maintain the pH of environment in the optimal range of 8.5-9.7. As a result, the biomass concentration increases to 1.4 g/L, while this value is 1.23 g/L in the case non-using  from smoke of boiler. On the basis of the obtained results, it is basic to calculate equipment and to build a technology process for the green production of cultivation of Spirulina algae from by using the  molecules emitted from the combustion of biomass combining alkaline water ion-life can be applied practically.
Differences between Chemical Reaction Kinetics and Adsorption Kinetics: Fundamentals and Discussion
Authors: Tran Hai Nguyen
Published: June 2022

Adsorption kinetics is an essential part in adsorption studies. The pseudo-first-order (PFO) and pseudo-second-order (PSO) models are frequently used to model the experimental dataset of time-dependent adsorption. The differential equations (based on reaction rate and rate law) of the PFO and PSO models are similar to those of chemical reactions (i.e., first and second order-kinetic reactions). The adsorption kinetics is illustrated through the plot of qt (the amount of adsorbate adsorbed by adsorbent at time t) vs. time. This plot includes two important regions (kinetic and equilibrium). The adsorption rate constant (k1(PFO) or k2(PSO), respectively) of the PFO or PSO models needs to be calculated from two regions. The appropriate selection of initial adsorbate concentrations for studying adsorption kinetics should be based on adsorption isotherm to ensure that adsorption sites in adsorbent (material) are highly (nearly fully) covered by adsorbate (solute). Only in this case, the rate constant of the adsorption is accurately obtained.
Synthesis and Characterization of Hybrid Nanocomposites of Gold Nanostars Encapsulated on Graphene Oxide as Active SERS Nanotags
Authors: Tran Thi Nhung
Published: June 2022

Hybrid nanocomposites of gold nanostars and graphene oxide exhibit intriguing optical and electrical properties derived from the sharp-tip effect of nanostars and the high conductivity of honeycomb structure from C-sp2 hybridization of graphene-based materials. This work presents a facile way to wrap graphene oxide nano-colloids surrounding the as-prepared gold nanostars via the assistance of linker molecules, 4-aminothiophenol, as effective nanotags. Upon tightly binding to the surface of gold nanostars via gold- thiol interactions, 4-aminothiophenol can modify the surface of gold nanostars positively charged originated from amine groups and thus facilitate the self-assembly of negatively charged graphene oxide to wrap around the surface of gold nanostars. The SEM, TEM images and the shift in the Uv-Vis spectra of the resulting gold nanostars- graphene oxide nanocomposites reveal the successful encapsulation. Besides, the enhanced Raman signal of 4-aminothiophenol highlights the potential of the obtained gold nanostars-graphene oxide hybrids as effective nanotags for applications in surface enhanced Raman scattering sensing and bio-imaging.
Degradation Kinetics of Chlorophyll Pigments in Dried Leaves of Polyscias Fruticosa (L.) Harms during Storage
Authors: Nguyen Thi-Van-Linh , Tran Thi-Tuyet-Ngan , Nguyen Quoc-Duy , Nguyen Thi-Thuy-Dung
Published: June 2022

Chlorophyll is well-known as the only natural green pigment that owns high biological values with an enormous amount worldwide. In this study, the experiment was designed to a two-level factorial design with three factors, including storage temperature (4 and 28 °C), level of light (with or without light transmission through the package), and level of oxygen (high and low oxygen concentration in package). The chlorophyll content in samples was analyzed every three days. The results showed that the Weibull model could characterize chlorophyll content change in dried P. fruticose leaves. Factors including temperature, light, oxygen and their interactions significantly forced the rate of chlorophyll degradation. Storage of dried P. fruticose leaves at 4 °C, lack of light and oxygen could get the highest retention of chlorophyll a and b. And in this condition, the half-life was 222 days and 376 days for the degradation of chlorophyll a and b, respectively.
Plant Flavonoids as Potential Natural Antioxidants in Phytocosmetics
Authors: Tran Pham Linh Phuong , Le Hong Phu
Published: June 2022

Phytocosmetics, the sub-discipline of cosmetology which primarily uses plant and plant extracts in beauty treatments, has been endorsed for thousands of years. After a period of time being pushed aside by an enormous wave of interest in synthetic products, phytocosmetics is slowly but surely returning to its propitious moment. Botanical compounds, among which flavonoids are highlighted, are being recognized for their biological activities – namely antioxidant, anti-aging, anti-inflammatory, anti-microbial and photoprotective activities. The purpose of this paper is to review updates in the extensive research into the potential of flavonoids in cosmetic applications, in order to demonstrate the newest achievement and encourage more interest into the field. A literature search was performed in PubMed in February and March 2022 with key terms including “phytocosmetics”, “flavonoids” and “antioxidant”. To keep the search topical, the publication years were limited to after 2010. The results were screened with the exclusion criteria of duplicate papers, irrelevant research, and non-English articles. The antioxidant activity of flavonoids have been widely established in a variety of plant sources. Their potential in cosmetics is also evident and has been attributed to their chemical structures, with their biological mechanisms starting to be better understood. In conclusion, flavonoids have been shown to be a viable alternative to synthetic antioxidants for cosmetic applications. However, there is still a need to evaluate effective delivery aids and formulations.
Investigation of Changes of Antioxidant Properties of Coffee through Fermentation by Using Saccharomyces Cerevisiae and Bacillus Subtilis
Authors: Dinh Yen Nhi , Nguyen Quang Duy , Le Hong Phu
Published: June 2022

The study was carried out to investigate the changes of antioxidant properties and quality of green coffee beans fermented by using Bacillus subtilis and Saccharomyces cerevisiae as starter cultures in sugarcane and banana juice at different times fermentation. The fermentations were conducted with different juice concentrations for different fermentation times 24, 48, and 72 hours at room temperature. Antioxidant properties were determined by Folin-Ciocalteu reagent for the determination of total phenolic content, DPPH assay for the determination of antioxidant capacity, and colorimetric method used for determination of total flavonoid content. As a result, coffee fermentation at 10oBrix, 107 cells/mL for each type of microbe, and the time (48 hours) had a positive effect on antioxidant properties. However, there was not a significant difference in terms of antioxidant properties between fermented and original coffee beans at optimal conditions. Therefore, antioxidant properties were dramatically reduced during the early stages of fermentation, but it was shown to be able to overcome it through this study.  This study is a premise to applying microbial products through fermentation to create a coffee with high antioxidant activity compared to conventional coffee products.
Aqueous Enzymatic Extraction Conditions of Bioactive Compounds from Ultrasound Pretreated Noni (Morinda Citrifolia L.) Extract
Authors: Ho Tran Thi Huyen , Nguyen Diem Ho Ngoc , Nguyen Cong Thanh , Kha Tuyen
Published: June 2022

Four different factors involved in the aqueous enzymatic extraction of the bioactive compounds, including total polyphenols, total flavonoids, total saponins, and vitamin C, from ultrasound pretreated noni (Morinda citrifolia L.) powder were examined. The study showed that the most suitable enzymatic extraction conditions for the content of the bioactive compounds were obtained at the concentration of enzyme (mixture of pectinase and cellulase, at 1:1, w/w) at 0.5% dry weight (d.w.), the water-to-powder ratio of 16/1 (mL/g), and the incubation temperature at 60oC for 45 min when ultrasonic pretreatment was fixed at 50 ± 5˚C for 10 min. Under those conditions, the highest content of total polyphenols, flavonoids, saponins, and vitamin C was found to be 12.53 ± 0.09 mg GAE/g d.w., 6.45 ± 0.61 mg QE/g d.w., 56.02 ± 2.45 mg AE/g d.w., and 1.04 ± 0.09 mg AA/g d.w., respectively. For comparison, the results indicated that the application of ultrasound and enzymes has shown to be effective in improving aqueous extraction. Therefore, it can be concluded that the present extraction method is a novel and green alternative method for extracting bioactive compounds from noni fruit.
Is Indirect Perpetration Possible in All Kinds of Crimes?
Authors: Karagyozova Tanya
Published: June 2022

This article studies the issues of whether indirect perpetration has the same range as direct perpetration, and of whether indirect perpetration is possible every time when the indirect perpetrator uses a non-criminally liable person. And, last but not least, it analyzes the possibility of crimes that require special qualities of the subject or special intention to be committed by the indirect perpetrator.
Development of the Аdministrative Penalty in the Years After the Liberation and Its Establishment as Independent Administrative Criminal Proceedings
Authors: Aleksieva Ralitsa
Published: June 2022

The subject of this article is the development of the administrative penalty in the years after the Liberation of Bulgaria and its establishment as independent administrative criminal proceedings. Administrative sanctions in Bulgaria existed even before the adoption of the current Law on Administrative Violations and Penalties (LAVP) in 1969, although not independently. This law regulates the legal definition of administrative violation: a human act expressed through action or inaction contrary to the established order of the ruling socialist government. With the adoption of LAVP and the repeal of Chapter XXVIII of the Bulgarian Code of Criminal Procedure of 1952, the administrative process is separated as independent along with the criminal and civil ones. LAVP already represents a systematic construction of substantive and procedural norms with global and developed sanctions.
YEREL VE ULUSAL E-DEVLET GELİŞİM MODELLERİ VE BELİRLEYİCİLERİ ÜZERİNE BİR İNCELEME
Authors: YILDIRIM Korkmaz
Published: June 2022

Ülkeler arasında yerel düzeyde e-devlet ’in benimsenmesi ve geliştirilmesi hususunda belirgin farklılıkların oluşmaktadır. Söz konusu farklılıklar üzerinde ise ulusal düzeyde e-devlet gelişmişlik düzeyi başta olmak üzere çeşitli sosyoekonomik, politik ve demografik unsurlar etkili olmaktadır. Ancak yapılan çalışmaların belirleyici bir unsur olarak özellikle ulusal düzeyde e-devlet gelişmişlik düzeyinin yereldeki gelişimleri etkileme düzeylerini yeterli ölçüde açıklamadığı gözlenmektedir. Fakat demografik, politik, yönetsel, mali ve teknik kapasite gibi yerel e-devletin gelişimi üzerinde etkili olan etmenler doğrudan ya da dolaylı olarak ulusal düzeyde kamusal mal ve hizmet sunumunu gerçekleştiren kamu kurumları, özel sektör ve sivil toplumun e-devleti benimseme ve geliştirme düzeyi ile bağlantıldır. Bu kapsamda çalışmanın temel amacı farklı boyutları (e-bilgi, e-servis ve e-katılım gibi) itibariyle ulusal e-devlet gelişim düzeyinin yerel dijital değişim ile ilişki boyutu ve etki düzeyini incelemektir. Bu amaçla çalışmada Birleşmiş Milletler E-Devlet Gelişim Anketi (2020) kapsamında açıklanan bilimsel veriler çerçevesinde karşılaştırmalı ülke örnekleri üzerinden ulusal ve yerel e-devlet gelişim düzeyleri mukayese edilerek, yerel e-devlet gelişim üzerinde merkezi düzeydeki gelişmişliğin anlamlı bir farklılaşmaya sebep olup olmadığı sorgulanmaktadır. Bu amacı gerçekleştirmek için Sıralı (ordinal) Regresyon Analizinden faydalanılmıştır. Çalışma sonucunda elde edilen sonuç ise e-katılım ve çevrim içi hizmetlerden ziyade ulusal telekominasyon alt yapısının ve beşeri sermayenin yerel e-devletinde temel belirleyicisi olduğudur.