bluuebunny/crossref_metadata_2025 huggingface dataset:
Cone beam computed tomographic analysis of the spatial limitation during mandibular arch distalization
Authors: Chen Chia-Ling , Chen Chia-Hui , Pan Chin-Yun , Chang Hong-Po , Chen Ping-Ho , Tseng Yu-Chuan
Published: January 2020

Background: In the literature, attempts are seldom made to quantify spatial limitation during mandibular arch distalization. This study aimed to investigate the spatial limitations associated with cortical contact with the mandibular second molar during mandibular arch distalization. Methods: The study population included 67 individuals who had undergone cone beam computed tomography (CBCT) (34 male and 33 female; mean age: 23.9 ± 2.72 years). The total ridge width, alveolar housing width, and root width were measured to evaluate the buccolingual limit. The space distal to the molar root represented the mesiodistal limit. The influence of sex, right versus left side, root-contact condition, malocclusion category, and presence of wisdom teeth were evaluated. Results: The rate of cortical contact was 49.3% before any orthodontic movement. No significant differences were observed in the alveolar width according to sex (male vs female), side assessed (right vs left), wisdom teeth (present vs absent), or malocclusion category. The ridge width and the alveolar width were smaller in the contact group than in the non-contact group ( P < 0.01). The group with wisdom teeth showed a larger available distalization distance, but a significant difference was observed only near the alveolar crest. Conclusions: Both ridge width and available distalization distance were limiting factors for mandibular teeth distalization. For cases in which whole-arch distalization is planned, CBCT is recommended before treatment, especially for non-extraction treatment. This approach ensures safe and predictable tooth movement.
Aspirin for metal stent in malignant distal common bile duct obstruction (AIMS): Study protocol for a multicenter randomized controlled trial
Authors: Choi Jin Ho , Paik Woo Hyun , You Min Su , Lee Kyong Joo , Choi Young Hoon , Shin Bang-sup , Lee Sang Hyub , Ryu Ji Kon , Kim Yong-Tae
Published: January 2020

Background Endoscopic retrograde biliary drainage (ERBD) is the treatment of choice for patients with malignant distal common bile duct (CBD) obstruction. Self-expandable metal stents (SEMS), which are commonly used in unresectable cases, have many clinical advantages, including longer stent patency. Although the expected patency of SEMS is around eight months, it has recently been reported that the duration of SEMS patency in patients using aspirin is prolonged. Our study therefore aims to confirm the effect of aspirin on SEMS patency. Methods This is an investigator-initiated, prospective, multicenter, double-blind, randomized placebo-controlled trial that will be conducted from November 2017 in four tertiary centers in South Korea. We intend to include in our study 184 adult (≥ 20 years) patients with malignant distal CBD obstruction for whom ERBD with SEMS was successfully performed. The patients will be randomly allocated to two groups, which will comprise patients who have either taken 100 mg aspirin or a placebo for six months after index ERBD. The primary outcome will be the rate of stent dysfunction, and the secondary outcomes will be the duration of patency, the rate of reintervention, and the occurrence of adverse events. Discussion The aspirin for metal stents in malignant distal common bile duct obstruction (AIMS) study will determine the efficacy of aspirin in maintaining metal stent patency in patients with malignant distal CBD obstructive.
Advanced ultrasound Methods in assessment of carotid plaque instability: A prospective multimodal study
Authors: Zamani Mahtab , Skagen Karolina , Scott Helge , Russell David , Skjelland Mona
Published: January 2020

Background: A significant proportion of ischemic strokes are caused by emboli from atherosclerotic, unstable carotid artery plaques. The selection of patients for endarterectomy in current clinical practice is primarily based on the degree of carotid artery stenosis and clinical symptoms. However, the content of the plaque is known to be more important for stroke risk. Intraplaque neovascularization (IPN) has recently emerged as a possible surrogate marker for plaque instability. Neo-microvessels from the adventitial vasa vasorum grow into the full thickness of the vessel wall in an adaptive response to hypoxia, causing subsequent intraplaque haemorrhage and plaque rupture. Conventional ultrasound cannot detect IPN. Contrast-enhanced ultrasound and Superb Microvascular Imaging (SMI), have, however, shown promise in IPN assessment. Recent research using Shear Wave Elastography (SWE) has also reported reduced tissue stiffness in the artery wall (reduced mean Young’s modulus) in unstable compared to stable plaques. The purpose of this study is to identify unstable carotid artery plaques at risk of rupture and future ischemic stroke risk using multimodal assessments.

Methods: Forty five symptomatic and 45 asymptomatic patients >18 years, with >50% carotid stenosis referred to Oslo University Hospital ultrasound lab will be included in this on-going project. Patients will undergo contrast enhanced ultrasound, SMI, carotid-MRI and PET-(18F-FDG). Contrast enhanced ultrasound will be analyzed semi-quantitatively (5-levels visual classification) and quantitatively by plotting time-intensity curve analyses to obtain plaque peak contrast enhancement intensity. Plaques removed at carotid endarterectomy will be assessed histologically and the number of microvessels, areas of inflammation, granulation, calcification, lipid and fibrosis will be measured.

Discussion: This multimodality study will primarily provide information on the clinical value of advanced ultrasound methods (SMI, SWE) for the detection of unstable carotid artery plaque in comparison with other methods including contrast-enhanced ultrasound, carotid-MRI and PET-(18F-FDG) using histology as the gold standard. Secondly, findings from the methods mentioned above will be related to cerebrovascular symptoms, blood tests (leukocytes, CRP, ESR, lipoproteins and inflammatory markers) and cardiovascular risk factors at inclusion and at 1-year follow-up. The overall aim is to optimize detection of plaque instability which can lead to better preventive decisions and reduced stroke rate.
Decentralized stable and robust fault-tolerant PI plus fuzzy control of MIMO systems: a quadruple tank case study
Authors: Patel Himanshukumar R. , Shah Vipul A.
Published: January 2020

This paper presents a typical design of fault-tolerant control using two decentralized PI plus fuzzy controllers to control the level of the lower two tanks in a nonlinear quadruple tank level process (QTLP). We also present some basic aspects of decentralized control design concerning stability and performance and illustrate them on a case study: a virtual model of a quadruple tank process. Control structure selection based on performance relative gain array (PRGA) is used, and its ability to evaluate the achievable performance is discussed. The controllers are designed based on a conventional PI controller plus fuzzy inference system technique. The relation between inputs/outputs was proved using relative gain array (RGA), and then, we divided the quadruple tank system into two subsystems and controlled each of them separately, both in minimum and non-minimum phases. Both the controllers were designed to control the nonlinear QTLP at any operating points. The proposed approach was compared with a decentralized fuzzy controller subject to actuator/sensor and system component faults. The simulation results show that the proposed decentralized fault-tolerant PI plus fuzzy controller has a more accurate tracking level and less computational time in both minimum and non-minimum phases.
Features of the diagnosis of a twin reversed arterial perfusion syndrome in
the first trimester of gestation
Authors: N.M. Normuradova, Î.À. Khujakulov
Published: January 2020

Two observations of a twin reversed arterial perfusion syndrome at the end of the first trimester of gestation
with preservation of heart contractions in the recipient fetus (acardiac fetus) are presented. The diagnostic criteria
and the results of Doppler study of the vessels of both fetuses are discussed
Сравнительный структурно-динамический анализ ультратонких волокон поли-(3-гидроксибутирата), модифицированного комплексами тетрафенилпорфирина с металлами
Authors: Карпова С. Г. , Ольхов А. А. , Чвалун С. Н. , Тюбаева П. М. , Попов А. А. , Иорданский А. Л.
Published: January 2020

Проведены комплексные исследования, сочетающие рентгеноструктурный анализ, термофизические, динамические измерения зондовым методом и сканирующую электронную микроскопию. Рассмотрена особенность кристаллической и аморфной структуры ультратонких волокон на основе поли(3-гидроксибутирата) (ПГБ), содержащего минорные концентрации (0–5%) комплексов тетрафенилпорфирина (ТФП) с марганцем (в форме MnCl2 ), цинком и железом (в форме FeCl3 ). Показано, что при добавлении в волокна ПГБ указанных комплексов меняется морфология волокон, наблюдается изменение кристалличности и замедление молекулярной подвижности в плотных и рыхлых аморфных областях ПГБ в следующей последовательности: ПГБ/ТФП, ПГБ/Zn–ТФП, ПГБ/MnCl2 –ТФП, FeCl3 –ТФП. Температурное воздействие на волокна (их отжиг при 140°С) приводит к резкому росту кристалличности и молекулярной подвижности в аморфных областях волокон. Их экспозиция в водной среде при 70°С приводит к росту энтальпии плавления и замедлению молекулярной динамики только в исходном ПГБ, но к значительному снижению энтальпии в модифицированных волокнах. Молекулярная подвижность цепей в аморфных областях при этом возрастает. Полученные волокнистые материалы обладают бактерицидными свойствами и должны найти применение при создании новых терапевтических систем антибактериального и противоопухолевого действия.
Physico-chemical and bacteriological quality of groundwater in a rural area of Western Niger: a case study of Bonkoukou
Authors: Adamou Hassane , Ibrahim Boubacar , Salack Seyni , Adamou Rabani , Sanfo Safietou , Liersch Stefan
Published: January 2020

The precariousness of the rural population in Africa is often symbolized by the lack of potable and safe drinking water. This study investigates the physico-chemical and bacteriological characteristics of 32 water samples with respect to WHO standards. The water samples were collected from wells, boreholes and small drinking water supply systems (DWS) in and around the township of Bonkoukou (Niger). The Water Quality Index (WQI) tool was used to assess the overall water quality with different physico-chemical parameters. Where the pH of the samples was acceptable, the samples showed higher levels of mineralization and deoxygenation. Overall, the samples were slightly hard, chlorinated and sulfated but much alkaline and contained nitrate and nitrite ions 2–16 times higher than the WHO standards. The use of WQI shows that samples in the DWS are safe for drinking. Samples coming from wells are the most polluted (58.50%) compared to those taken from boreholes (53.00%), while the percentage of samples from boreholes, unfit for drinking, is higher (41.00%) than that of the samples taken from wells (25.00%). Moreover, water in this area was characterized by the presence of total germs indicating bacteriological pollution. Hence, for the supply of safe drinking water to the larger number of people in such a rural area, the capacity of actual DWS must be improved and widespread.
Hydrological assessment for the availability of water for off-stream uses of Karatoa-Atrai River in Bangladesh
Authors: Nowreen Sara , Haque Preetha , Mondal M. Shahjahan , Zzaman Rashed Uz
Published: January 2020

Explicit consideration of in-stream flow requirement (IFR) has now become almost mandatory in many rivers before irrigation withdrawal is made. Thereby, the primary objective was to evaluate the IFR through hydrological approaches and compare the condition with current flow variability and trends. Flow records were collected from five discharge stations for IFR estimation. Performance of the river was also judged with respect to nine hydraulic cross-sectional data and stage data of ten water-level monitoring stations of Bangladesh Water Development Board (BWDB). Results show that since 2000, the upper Karatoa was able to meet IFR, but the lowest part of the river experienced severe deterioration in addressing its dry season functionality. Also, the decreasing trend in off-stream availability is recognized as a threat to the Singra site resulting from severe aggradations of the river beds. Attention to the less off-stream availability at Singra raises concerns over sustaining the river from drying out. It is now evident that a hydrological approach of IFR is more than just an initial rough estimate. Such a precautionary method works well to provide quick technical support and decision reference for a complex system, in particular, to find specific drying out parts of a river of concern.
Challenges in the Discovery of Novel Therapeutic Agents in Cancer
Authors: Nagaraju Ganji Purnachandra , Kamal Mohammad Amjad
Published: January 2020

One of the major challenges currently facing cancer therapy is the development of drug resistance either intrinsically or as a
result of treatment. Treatment evasion is mediated by an intricate web of signalling cascades and adaptations caused by selective therapeutic
pressure, leading to metastatic spread and patient death. Hence, discovering and designing novel therapeutic compounds and regimens
based on specific alterations in the cancer microenvironment and capable of overcoming resistance to traditional therapies is necessary
to improve cancer survival outcomes. These new therapeutic modalities should exhibit improved solubility, penetration capacity and
bioavailability in the tumor microenvironment as well as enhanced target specificity compared to old generation compounds. The success
of this endeavour will contribute to the advent of precision medicine leading to personalized therapeutic approaches for patients.
Evolution of Machine Learning Algorithms in the Prediction and Design of Anticancer Peptides
Authors: Basith Shaherin , Manavalan Balachandran , Shin Tae Hwan , Lee Da Yeon , Lee Gwang
Published: January 2020

:

Peptides act as promising anticancer agents due to their ease of synthesis and modifications,
enhanced tumor penetration, and less systemic toxicity. However, only limited success has been
achieved so far, as experimental design and synthesis of anticancer peptides (ACPs) are prohibitively
costly and time-consuming. Furthermore, the sequential increase in the protein sequence data via highthroughput
sequencing makes it difficult to identify ACPs only through experimentation, which often
involves months or years of speculation and failure. All these limitations could be overcome by applying
machine learning (ML) approaches, which is a field of artificial intelligence that automates analytical
model building for rapid and accurate outcome predictions. Recently, ML approaches hold great
promise in the rapid discovery of ACPs, which could be witnessed by the growing number of MLbased
anticancer prediction tools. In this review, we aim to provide a comprehensive view on the existing
ML approaches for ACP predictions. Initially, we will briefly discuss the currently available ACP
databases. This is followed by the main text, where state-of-the-art ML approaches working principles
and their performances based on the ML algorithms are reviewed. Lastly, we discuss the limitations
and future directions of the ML methods in the prediction of ACPs.
Turning Foes to Friends: Knocking Down Diabetes Associated SGLT2 Transporters and Sustaining Life
Authors: Gupta Ankit , Mittal Sheenu , Monika  , Dhingra Richa , Dhingra Neelima
Published: January 2020

Background:

The discovery of Sodium-Glucose co-transporter-2 (SGLT2) inhibitors had
rewritten the treatment of diabetes mellitus with an impressive fall in the incidence of death and associated
complications.

Introduction:

The SGLT2 inhibitors by inhibiting the SGLT2 in the proximal nephron, helps in reducing
the reabsorption of approximately 90% of the filtered glucose and increased urinary glucose excretion
(UGE).

Methods:

The literature related to SGLT2 inhibitors has been thoroughly explored from various available
public domains and reviewed extensively for this article. Detailed and updated information
related to SGLT2 inhibitors with a major focus on the recently approved Ertuglifolzin is structured in
this review.

Result:

The present review is an effort to understand the management of diabetes mellitus over the past
few decades with a special focus on the role of SGLT2 receptor in the causes of therapeutic and preventive
strategies for diabetes mellitus. Pragmatic placement of the currently available Canagliflozin,
Dapagliflozin, and Empagliflozin as oral antidiabetic agents has been done. Well accommodated stereochemistry
and a high docking score of Ertugliflozin in ligand-receptor simulation studies attribute to
its high potency.

Conclusion:

This review highlights the unique mechanism of SGLT2 Inhibitors coupled with pleiotropic
benefits on weight and blood pressure, which make it an attractive choice of therapy to diabetic
patients, not controlled by other medications.
Anticancer Effect of Amygdalin (Vitamin B-17) on Hepatocellular Carcinoma Cell Line (HepG2) in the Presence and Absence of Zinc
Authors: El-Desouky Mohamed A. , Fahmi Abdelgawad A. , Abdelkader Ibrahim Y. , Nasraldin Karima M.
Published: January 2020

Background:

Amygdalin (Vitamin B-17) is a naturally occurring vitamin found in the seeds of the
fruits of Prunus Rosacea family including apricot, bitter almond, cherry, and peach.

Objective:

The purpose of this study was to examine the effect of amygdalin with and without zinc on hepatocellular
carcinoma (HepG2) cell line.

Methods:

MTT assay was used to evaluate the cytotoxicity of amygdalin without zinc, amygdalin + 20μmol
zinc, and amygdalin + 800μmol zinc on HepG2 cell lines. The cell cycle distribution assay was determined by
flow cytometry. Apoptosis was confirmed by Annexin V-FITC/PI staining assay. Moreover, the pathway of
apoptosis was determined by the percentage of change in the mean levels of P53, Bcl2, Bax, cytochrome c, and
caspase-3.

Results:

Amygdalin without zinc showed strong anti-HepG2 activity. Furthermore, HepG2 cell lines treatment
with amygdalin + 20μmol zinc and amygdalin + 800μmol zinc showed a highly significant apoptotic effect than
the effect of amygdalin without zinc. Amygdalin treatment induced cell cycle arrest at G2/M and increased the
levels of P53, Bax, cytochrome c, and caspase-3 significantly, while it decreased the level of anti-apoptotic Bcl2.

Conclusion:

Amygdalin is a natural anti-cancer agent, which can be used for the treatment of hepatocellular
carcinoma. It promotes apoptosis via the intrinsic cell death pathway (the mitochondria-initiated pathway) and
cell cycle arrest at G/M. The potency of amygdalin in HepG2 treatment increased significantly by the addition
of zinc.
Synthesis and Applications of Hydrogels in Cancer Therapy
Authors: Singhal Anchal , Sinha Niharika , Kumari Pratibha , Purkayastha Manoushikha
Published: January 2020

:

Hydrogels are water-insoluble, hydrophilic, cross-linked, three-dimensional networks of polymer
chains having the ability to swell and absorb water but do not dissolve in it, that comprise the major difference
between gels and hydrogels. The mechanical strength, physical integrity and solubility are offered by the
crosslinks. The different applications of hydrogels can be derived based on the methods of their synthesis, response
to different stimuli, and their different kinds. Hydrogels are highly biocompatible and have properties
similar to human tissues that make it suitable to be used in various biomedical applications, including drug delivery
and tissue engineering. The role of hydrogels in cancer therapy is highly emerging in recent years. In the
present review, we highlighted different methods of synthesis of hydrogels and their classification based on
different parameters. Distinctive applications of hydrogels in the treatment of cancer are also discussed.
An Efficient Cluster-based Flooding Using Fuzzy Logic Scheme (CBF2S) In Mobile Adhoc Networks
Authors: Mahima S. , Rajendran N.
Published: January 2020

Aims and Objectives:

Mobile Ad hoc Networks (MANET) hold a set of numerous mobile
computing devices useful for communication with one another with no centralized control. Due
to the inherent features of MANET such as dynamic topology, constrained on bandwidth, energy
and computing resources, there is a need to design the routing protocols efficiently. Flooding is a
directive for managing traffic since it makes use of only chosen nodes for transmitting data from
one node to another. This paper intends to develop a new Cluster-Based Flooding using the Fuzzy
Logic Scheme (CBF2S).

Methods:

To construct clusters and choose proper cluster heads (CHs), the fuzzy logic approach is
applied with the use of three parameters namely link quality, node mobility, and node degree. The
presented model considerably minimizes the number of retransmissions in the network.

Results:

The presented model instructs the cluster members (CM) to flood the packets inside a cluster
which is known as intra-cluster flooding and CHs to flood the packets among the clusters which
is known as inter-cluster flooding. In addition, the gateway sends a packet to another gateway for
minimizing unwanted data retransmissions when it comes under different CH. The presented CBF2S
is simulated using the NS2 tool under the presence of varying hop count.

Conclusion:

The CBF2S model exhibits maximum results over the other methods in terms of overhead,
communication overhead, traffic load, packet delivery ratio, and the end to end delay.
In Vitro Antioxidant and Anti-Convulsant Activity of Methanolic Extract of Sarasvata churna Using scPTZ and MES Models
Authors: Kaushik Rahul , Jain Jainendra , Mazumder Avijit
Published: January 2020

Background:

Sarasvata churna is an Ayurvedic formulation for treatment and management of epilepsy and other maniac disorders since thousands of years.

Objective:

This study aimed to evaluate the in vitro antioxidant potential, total phenolics and flavonoids content, acute-oral-toxicity and anticonvulsant activity of Sarasvata churna.

Materials & Methods:

In vitro antioxidant activity of methanolic extract of Sarasvata churna against Nitrous oxide, Peroxide, Phosphomolybdenum and Hydroxyl radicals was performed using Colorimetry against Ascorbic acid as standard along with estimation of total phenolic and flavonoids content. Acute oral toxicity was evaluated using OECD guidelines. Extract in carboxymethyl cellulose at doses of 50,75,100,125,150 and 200 mg/kg was screened for anticonvulsant activity using subcutaneous Pentylenetetrazole and Maximal Electroshock models in Swiss Albino Mice (n=6). Sodium valproate was used as standard.

Results:

IC50value of methanolic extract in the Nitrous oxide, Peroxide, and Hydroxyl free radical scavenging assay was found to be 165mg/ml, 32.5mg/ml and 253.9mg/ml respectively as compared to 61.58μg/ml, 333.44μg/ml and 351μg/ml respectively of standard Ascorbic acid. In acute oral toxicity screening, animals did not show any signs of acute and delayed toxicity even up to a dose of 2000mg/kg. Extract offered a protection of 57.39% and 85.26% in scPTZ model (P<0.0001) and 74% and 96.38% in MES model (P<0.0001) at doses of 50 and 200mg/kg respectively as compared to standard at 95% Confidence interval (ANNOVA, Tukey test) indicating a dose-dependent protection.

Conclusion:

Sarasvata churna’s potentials are comparable with standard antioxidant Ascorbic acid and antiepileptic drug Sodium valproate. This preclinical and toxicity screening data can be beneficial in establishing the scientific basis for the use of Sarasvata churna in management of epilepsy.
In vitro Studies on Antimicrobial Sensitivity of Staphylococcus aureus from Prosopis juliflora, Cassia occidentalis and Tephrosia purpurea
Authors: Andhare Aishwarya A. , Shinde Ravindra S.
Published: January 2020

Background:

The resistance of Staphylococcus aureus to commonly used antibiotics is linked to their ability to acquire and disseminate antimicrobial-resistant determinants in nature. This study determined the antibiotic sensitivity profile of Staphylococcus aureus isolated from milk samples of mastitic and healthy dairy cattle. Isolation and Identification of S. aureus was done by Marphological and Biochemical characters.

Methods:

The primary purpose of this study was to determine Antibiotic Sensitivity of Staphylococcus aureus by using extracts of Prosopis juliflora, Cassia occidentalis and Tephrosia purpurea. Antimicrobial properties of plant extracts were analyzed by determining Zone of Inhibition (ZOI) and Minimum Inhibitory Concentration (MIC). Antibiogram pattern of the isolated Staphylococcus aureus was observed to be Susceptible, Intermediate and Slight resistant by Prosopis juliflora, Tephrosia purpurea and Cassia occidentalis respectively.

Result:

From the results, it has been indicated that the extracts of Tephrosia purpurea, Prosopis juliflora and Cassia occidentalis are having potential to use in the management of Staphylococcus aureus.

Conclusion:

Further phytochemical analysis is required to identify the active components of plant extracts showing antimicrobial activity.
Design and Development of the Novel Electrothermal Wall-Hanging Boiler
Authors: Yongxiang Li , Wei Mao , Weiquan Xu , Lin Luo , Gangqiang Lu
Published: January 2020

Background:

With the rapid development of the domestic, independent heating system,
the wall-hanging boiler has become the focus of concern for a large number of users. As an independent
heat source, it has been widely applied in many places.

Objective:

Based on many deficiencies emerging from the wall-hanging gas boiler used at present, a novel electrothermal wall-hanging boiler is presented in this paper to realize the family central heating and provide constant temperature water supply system in the meantime.

Method:

3D solid model of the wall-hanging boiler was firstly designed by using the software Solidworks, and then, based on ARM intelligent microcontroller, the circuit board production was completed with the corresponding control circuit design to conduct the automatic temperature regulation of the wall-hanging boiler, so as to achieve the desired effect of the constant temperature heating and energy conservation.

Results:

On the basis of the experiments and the test of sample, the trial operation of the prototype can meet the expected requirements. The greatest innovation of the product is to use a new type of nano semiconductor material and a sort of hydrocyclone mode to enhance the heat exchange in a more full and uniform way, as well as improve the thermal efficiency greatly.

Conclusion:

Such patent provides an effective theoretical and experimental basis for the diagnosis and fixing of the electrothermal wall-hanging boiler. With the help of the prototyping fabrication and debugging installation, it can be shown that the novel electrothermal wall-hanging boiler will have a very broad application prospect.
Reliability Analysis and Modeling of Green Computing Based Software Systems
Authors: Malik Sangeeta , Sharma Kapil , Bala Manju
Published: January 2020

Background:

Software industries are growing very fast to develop new solutions and ease
people’s life. Software reliability has been considered as a critical factor in today’s growing digital
world. Software reliability models are one of the most generally used mathematical tools for estimation
of software reliability. These reliability models can be applied on the development of sustainable
and green computing-based software’s having their constrained development environments.

Objective:

This paper proposes a new reliability estimation model for green IT environment based
software systems.

Methods:

In this paper, a new failure rate behavior-based model centered on green software development
life cycle process has been developed. This model integrates a new modulation factor for incorporating
changing needs in each phase of green software development methodology. Parameter
estimation for proposed model has been done using hybrid Particle Swarm Optimization and Gravitational
Search Algorithm. The proposed model has been tested on real-world datasets.

Results:

Experimental results are showing the enhanced capability of proposed model in simulating
real green software development environment. Using GC-1 and GC-2 dataset, the proposed model is
about 60.05% which is more significant than other models.

Conclusion:

This paper proposed a new failure rate model for softwares that have been developed
under green IT environment.
Структура и термодинамические свойства SmGaGe-=SUB=-2-=/SUB=-O-=SUB=-7-=/SUB=-
Authors: Денисова Л.Т. , Молокеев М.С. , Иртюго Л.А. , Белецкий В.В. , Белоусова Н.В. , Денисов В.М.
Published: January 2020

SmGaGe2O7 has been prepared by solid-phase synthesis in air at temperatures from 1273 to 1473 K using the Sm2O3, Ga2O3, and GeO2 oxides as starting materials. The structure of the studied germanate was determined by X-ray diffraction (space group P2_1 / c; a = 7.18610(9) Angstrem, b = 6.57935(8) Angstrem, c = 12.7932(2) Angstrem). Its high-temperature heat capacity has been measured by differential scanning calorimetry. The obtained experimental dependence C_p = f (T) has been used to evaluate the thermodynamic properties of the compound.
Пороговый характер раскручивания объемного пылевого кластера в магнитном поле
Authors: Карасев В.Ю. , Дзлиева Е.С. , Павлов С.И. , Новиков Л.А. , Эйхвальд А.И. , Машек И.Ч.
Published: January 2020

Представлено исследование воздействия магнитного поля на поведение объемного пылевого кластера, образованного в страте тлеющего разряда. Изучен кластер, состоящий из семи цепочек частиц и представляющий собой в горизонтальном сечении гексагональную ячейку. Обнаружено, что возникновение вращения пылевого кластера происходит в ненулевом магнитном поле в отличие от пылевой структуры, содержащей большее число частиц в горизонтальном сечении. Кроме того, обнаружено, что на пороговый характер возникновения вращения в кластере влияет разрядный ток и давление плазмаформирующего газа. В качестве интерпретации выдвинуто предположение об увеличении ионизации внутри пылевой структуры. Радиальный поток ионов, идущий в продольном магнитном поле из пылевой структуры к стенке разрядной трубки, дополнительно раскручивает структуру с отрицательной проекцией угловой скорости на вектор магнитной индукции. Ключевые слова: пылевая плазма, магнитное поле, тлеющий разряд, кластеры.
Влияние изохронных отжигов на поверхностные характеристики лент металлического стекла Ni-=SUB=-50-=/SUB=-Ti-=SUB=-50-=/SUB=-
Authors: Бутенко П.Н. , Гиляров В.Л. , Корсуков В.Е. , Корсукова М.М. , Обидов Б.А.
Published: January 2020

In this paper we investigated the crystallization of NiTi metallic glass foils of equiatomic composition by XRD and AFM. The initial foil surface which was obtained by the melt spinning method contained only cristalline phases of impurities. Ten-minute annealing at 500°C leads to phase transition in the form of devitrification of Ni50Ti50 phase. The analisys of foil surface geometry included calculation of direct inhomogeneities characteristics, roughness and fractal dimension, as well as the parameters of multifractal fromalism. It was showen that after ten-minute heat treatment at 500°C all above mentioned characteristics have local extrema. In particular there is a minimum of the widths of the singularities spectra which indicates the monofractalization of the system.
Цезий с остаточным кислородом на цилиндрическом поликристалле вольфрама
Authors: Зыков Б.М. , Красненкова Т.М. , Лазба Б.А.
Published: January 2020

Методами низкоэнергетической пороговой электронной спектроскопии и контактной разности потенциалов определены химические состояния и изменение работы выхода неоднородной многоуровневой пленки во время адсорбции цезия при 295 K на цилиндрическом газофазном поликристаллическом вольфрамовом покрытии (30 μm) сплава НбЦ-1 (Nb-1%Zr) с минимальной концентрацией остаточного кислорода. Определены химические состояния и изменение работы выхода этой пленки при последовательном прогреве до 1875 K. Ключевые слова: сплав ниобий-цирконий, вольфрамовое покрытие, остаточный кислород, адсорбция цезия, прогрев.
Генерация синглетного кислорода в микрокапиллярных оптических элементах с фотоактивными покрытиями
Authors: Багров И.В. , Киселев В.М. , Евстропьев С.К. , Саратовский А.С. , Демидов В.В. , Матросова А.С.
Published: January 2020

The results of the study of spectral and luminescence properties of oxide coatings comprising ZnO and Ag nanoparticles and the process of singlet oxygen generation by these coatings are presented. Based on experimental results the microcapillary photoactive cuvette for the air and water purification systems has been developed. Microcapillary photoactive cuvette is optical element made from silica glass and having the canals with predetermined sizes, shapes and spatial dispositions, which containing ZnO and MgO nanocrystals and Ag nanoparticles. High effectiveness of singlet oxygen generation by ZnO and ZnO-MgO-Ag coatings and microcapillary cuvette at the irradiation by UV (370 nm) and violet (405 nm) light has been demonstrated.
Электролюминесценция слоев Ta-=SUB=-2-=/SUB=-O-=SUB=-5-=/SUB=-, полученных методом молекулярного наслаивания
Authors: Барабан А.П. , Дмитриев В.А. , Дрозд В.Е. , Петров Ю.В. , Прокофьев В.А.
Published: January 2020

Abstract. The work shows the possibility of using electroluminescence to study the structures of Si-Ta2O5 and Si-SiO2-Ta2O5 and to obtain the information about the electronic structure of the Ta2O5 layer and the properties of the SiO2-Ta2O5 boundary. A model of the electronic structure of the Ta2O5 layer obtained by molecular layering (atomic layer deposition) is proposed to explain the type of spectral distribution of luminescence regardless of the method of its excitation. It is shown that the formation of a Ta2O5 layer on the surface of thermally oxidized silicon is accompanied by transformation of the near-surface region of SiO2 and quenching of the luminescence band in the spectral region of 650 nm.
Поляризационно-чувствительные регистрирующие среды для голографии на базе красителя--флуорофора lucifer yellow
Authors: Шавердова В.Г. , Петрова С.С. , Пурцеладзе А.Л. , Тарасашвили В.И. , Тарасашвили М.В.
Published: January 2020

Polarization-sensitive hologram media based on matrices of polyvinyl pyrrolidone and gelatin are created, containing Lucifer Yellow and Coummarine 466. A multiplexed dynamic hologram of Denisyuk is recorded in a luminescent photoanisotropic gyrotropic material, using linearly polarized radiation of the laser LSR 405 NL-50 (= 405 nm). Using the method of polarization-luminescent holography, the photoanisotropic characteristics of the beam have been measured corresponding to the reconstructed imaginary image of the object field.
The polarization spectra and photoluminescence intensity spectra of the reconstructed image were measured, depending on the composition of the recording medium. The possibility of multiplex recording has been demonstrated, as well as simultaneous observation of several images of an anisotropic-gyrotropic object encoded by different emission frequencies and / or polarization state.
The combination of non-destructive polarization-luminescent holographic measurement method with other luminescent spectroscopic methods significantly expands the scope of this application by increasing dramatically the overall information content of the study.
Управление детонационным горением посредством предварительной подготовки газовой смеси
Authors: Левин В.А. , Журавская Т.А.
Published: January 2020

Using a detailed kinetic model of chemical interaction, numerical investigation of influence of a preliminary preparation of a stoichiometrical hydrogen-air mixture (decomposition of some volumes of molecular hydrogen and molecular oxygen gases into atomic gases) on characteristics of a propagating detonation wave has been carried out.
It has been obtained that the preliminary partial dissociation of the gas mixture results in an essential decrease of the detonation cell size and a small increase of the self-sustained detonation wave propagation velocity. Due to the established detonation combustion features, preliminary preparation of the mixture can be used to prevent destruction of a detonation wave in channels with both a single transverse barrier and a barrier domain.
Tweets Flooded in Bandung 2016 Floods: Connecting Individuals and Organizations to Disaster Information
Authors: Santoso Anang Dwi
Published: January 2020

In a natural disaster, social media has been widely used as one of the primary communication channels to supplement the traditional ones. However, there is a lack of empirical research analyzing this evidence, therefore the purpose of this study is to identify the information shared by Twitter users during the Bandung Flood of 2016 based on period, location, and account ownership. A dataset of 754 tweets was acquired using the NCapture feature in NVivo for content analysis. The study found that social media has significant benefits primarily when sharing information from affected areas to communities outside the region. In more detail, Twitter is used by 28.4%, primarily by those not impacted by the flood, to express good wishes and memorializing. It is because people in the affected area shared firsthand information (23.8%) to them. Then, in addition to citizens, media, NGOs, government, and community leaders who have been found in earlier studies, actors such as civil service organizations (2.9%) and political parties (0.5%) have also participated in disaster relief.
Landsat 8 Observation of the Internal Solitary Waves in the Lombok Strait
Authors: Karang I Wayan Gede Astawa , Chonnaniyah Chonnaniyah , Osawa Takahiro
Published: January 2020

Landsat  8,  Landsat  Data  Continuity  Mission  (LDCM)  satellite,  was  launched  on  11 February 2013 with Operation Land Imager (OLI) sensors. Tis sensor has better radiometric performance than the previous mission, which is quantized in the 12-bit dynamic range due to an increase in the signal-to-noise (SNR) ratio. In this analysis, the spatio-temporal distribution of the propagation of the internal solitary wave (ISW) in the Lombok Strait was extracted from the Landsat 8 images described for the ﬁrst time.  Tere were 14 ISW events studied for period 2014  -  2015  using  Landsat  8.  Te  manifestations  of  ISW  recorded  on  Landsat  8  images  were then extracted using digitization method to investigate and measure several parameters and ISW distribution in the Lombok Strait. Te estimation results of the average ISW phase velocity in this study are 2.05 ms-1 with the direction of propagation heading north at an average angle of 19.08°. Tis study has shown that Landsat 8 can be used to monitor and analyze several internal wave parameters in the ocean.
Integrated design model for mobile learning pedagogy and application
Authors: Khan Asharul Islam , Al-Khanjari Zuhoor , Sarrab Mohamed
Published: January 2020

Mobile Learning (M-Learning) has added a new dimension to the traditional system of education. The importance of M-Learning has been acknowledged by industrialized countries and therefore these countries have implemented it in the educational institutions. The Software developer, Software analyst, and Software test engineer face challenges in requirements elicitation, design, development, testing, and deployment of M-Learning application. It’s because the Software engineering domain of M-Learning has not yet attended maturity. The design and development of M-Learning application is still a challenge. This study explores and analyses existing approaches in the design phase of M-Learning application development, reports the limitations, and propose a new solution. M-Learning has two basic components: pedagogy and software application (application). M-Learning pedagogy describes learning content in terms of instructional and learning design while software application provides platform for accessibility of learning content. The integration of these two components while designing, development, and testing play crucial role in the successful implementation of M-Learning. However, review of the existing literature has revealed lack of integrated approach for designing M-Learning pedagogy and application. There are researchers who have proposed design approaches for M-Learning pedagogy and application however separately. The significance of these approaches cannot be ignored but M-Learning application design and development suffers from compatibility issues, lack of design and testing mechanisms, identified stakeholders and their roles, lack of defined step and procedures. Therefore, this article presents an integrated design model for M-Learning pedagogy and application. The proposed model consists of pedagogy, application, and testing as important components. The application design is concerned with architectural level, high level, and detailed design. The pedagogical design is related to instruction and learning content. The test case design is concerned with formulation of conditions for testing the pedagogy and application. The proposed integrated design model has been compared with the existing approaches and ISO/IEC 12207:2008 and ISO/IEC 19796-1 standards. Also, the model has been reviewed by IT experts. The outcome is positive in both the cases.
Simulation study of amorphous Si solar cell with conducting anti-reflection coating and plasmonic nanostructured back reflector
Authors: Roy Sandipta , Pattanayak Arnab , Duttagupta Siddartha P.
Published: January 2020

This work is comprised of simulation results of amorphous Si (a-Si) solar cell, in which ITO was used as an anti-reflection coating (ARC). The thickness of ITO was optimized (65 nm) to achieve better optical absorption in a-Si in the spectral region of 350-800 nm. The absorption and reflection spectra of the solar cell using ITO and SiNx as an ARC were compared, and the results were found to be similar. Further, to enhance the light absorption in a-Si, silver nano hemispherical structures were used on top of the metallic back reflector. It was found that the average absorption by the a-Si was improved to ~80% using ITO as an ARC and hemispherical nanostructure on top of the back reflector.
Nanoparticles of Zn and ZnO as extreme pressure (EP) additives for lubricants
Authors: Tijerina Jose Taha , Castillo Flavio , Leal Javier , Parás Laura Peña , Cortés Demófilo Maldonado , Cruz Celso , García Gerardo Garza , García Patricio
Published: January 2020

The tribological behavior of moving components and tooling in the automotive industry is a critical issue for improving tool life and increasing efficiency. This work discusses the effects of Zn and ZnO nanoparticle additives homogeneously dispersed within a metal-forming synthetic fluid at various filler fractions: 0.01, 0.05 and 0.10wt.%. Nanolubricants were evaluated under scuffing conditions at extreme pressures (EP) conditions using a four-ball tribotester in order to obtain the load-carrying capacity (poz) behavior, and overall tribological characteristics. This method has shown, with great precision, the influence of the nanofillers on the EP behavior of conventional lubricants. Worn surfaces were characterized through Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) to determine the tribological mechanisms of nanoparticles. An Alicona 3D surface measuring system was used for measuring the surface roughness of the wear scars. Both nanoparticles exhibited better friction-reducing and anti-wear properties compared to the base synthetic fluid. For Zn-based nanolubricants, an enhancement of ~180% in poz was obtained with 0.10wt.%, showing the effect of the spherical nanostructures that were tribosintered onto the surface due to the EPs of the test. Furthermore, the highest enhancement in poz (up to 250%) was achieved with incorporation of 0.10wt.% of ZnO demonstrating the potential of nanolubricants for improving the efficiency of mechanical components.
Kinetic modeling of canola oil transesterification catalyzed by quicklime
Authors: Camacho J.N. , Muciño G. E. Galván , Vargas S.L. Martínez , Alonso C. Pérez , Natividad R.
Published: January 2020

This work aimed to study and model the kinetics of transesterification of canola oil with methanol catalyzed by calcined quicklime (CaO + MgO). The influence of three main variables was studied at 328 K: reagents order addition (has a negligible effect on the reaction), methanol-oil molar ratio (has minor effect on reaction rate after 1.5 h of reaction) and catalyst loading (high effect on reaction rate) to achieve at least a triglycerides conversion of 96.5% in concordance with norm EN 14103. A kinetic model based on an Eley-Rideal mechanism was found to well fit (R2 = 0.9886) the experimental data. Thus, it was concluded that for the quicklime catalyzed transesterification of canola oil with methanol to occur, first the methanol must be chemisorbed and the resulting methoxy species react with triglycerides in the interface liquid-solid. The whole process is limited by this step since methanol readily adsorbs onto the catalytic surface.
Synthesis and characterization of a mesoporous cerium oxide catalyst for the conversion of glycerol
Authors: Ruiz Misael García , Pliego Julia Aguilar , Franco Luis E. Noreña , Álvarez Carlos Márquez , Pariente Joaquín Pérez , Guaregua Nancy C. M Artin
Published: January 2020

CeO2 mesoporous materials were synthesized employing the “hard and soft template” technique. Ceria catalysts have been prepared by a nanocasting procedure using SBA-15 and KIT-6 silica-based templates and Pluronic P123 and F127 for the “soft template” technique. The mesoporous CeO2 was characterized by techniques such as N2 physisorption, which confirmed a mesoporous size pore system and transmission electron microscopy, TEM, which confirmed the material ordered pore structure. TGA/DTA analysis was used to determine the loss of weight compared to the temperature before and after the elimination of the template. On the other hand, by means of IR spectroscopy of the Ce-KIT-6 material, the partial elimination of the Si template after the NaOH treatment was confirmed by decreasing the peaks corresponding to the vibration bands of the Si-O-Si linkages. Finally, by temperature-programmed desorption (TPD) of NH3 and CO2, the acid and basic strength of the catalysts were determined, respectively. All samples exhibited much higher total basicity relative to total acidity. The analysis of TPR-H2 showed regions of low temperature (350-400ºC) where the reduction of the bulk is plausible to be initiated and of high temperature (550ºC) of superficial reduction of the ceria.The performance of the catalysts was evaluated in the dehydration reaction of glycerol in gas phase at 320 ºC. The mesoporous CeO2 material was selective to acetol and reached a 100% conversion of glycerol. The catalyst prepared by the “soft template” technique (CeO2-P123) was the most selective to acetol (76%) with a 12% selectivity to acrolein. With the catalyst prepared by the “hard template” technique (Ce-KIT-6), the selectivity towards acetol was 48% and 22% towards acrolein. The acid properties of CeO2 were found to be a determining factor for the selectivity to acetol and acrolein.