bluuebunny/crossref_metadata_2025 huggingface dataset:
Correlated Unique Variation of Electrical Resistivity to Crystallization Behavior of the Zr52.5Cu17.9Ni14.6Al10Ti5 Metallic Glass
Authors: Zhang Xiao , Jiang Xin , Huo Guangrui , Zhang Yuxiang , Qiao Yi , Ye Feng , Liu Binbin
Published: December 2019

Due to the differences between the glass and crystalline phases, crystallization of metallic glass occurs with heat release, volume shrinkage, and electrical resistivity drastic changes. Electrical resistivity of the Zr52.5Cu17.9Ni14.6Al10Ti5 metallic glass during crystallization was investigated under both continuous heating and isothermal annealing. This amorphous alloy exhibits a continuous variation instead of sharp decline when reaches the onset crystallization temperature. This unique variation was found to be related to the formation of a few quasicrystalline phases. The slower phase transformation process of this metallic glass brings lots of grain boundaries, which results in increasing of resistivity at the last stage during isothermal annealing. These results imply that electrical resistivity measurement is a more intuitive approach to investigate structure evolution of metallic glasses.
Transcriptomic Analysis of Viable but Non-Culturable Escherichia coli O157:H7 Formation Induced by Low Temperature
Authors: Zhong Junliang , Zhao Xihong
Published: December 2019

Escherichia coli O157:H7 is one of the most common pathogenic bacteria that pose a threat to food safety. The aim of this study was to investigate the mechanisms of the formation of viable but non-culturable (VBNC) E. coli O157:H7 induced by low temperature (−20 °C) using RNA sequencing (RNA-Seq) transcriptomics analysis. The results of the present investigation revealed the presence of 2298 differentially expressed genes in VBNC cells, accounting for 46.03% of the total number of genes. Additionally, GO function and KEGG pathway enrichment analysis were performed to investigate the functional and related metabolic pathways of the differentially expressed genes. We found that the ion transport, protein synthesis, and protein transmembrane transport activities were significantly improved in the VBNC cells, indicating that E. coli O157:H7 cells synthesized a considerable amount of protein to maintain the levels of their functional metabolic processes and life activities in the VBNC state. In conclusion, we suggest that the increased synthesis of proteins such as SecY, FtsY, and Ffh might indicate that they are the key proteins involved in the improvement of the transmembrane transport activities in VBNC E. coli O157:H7 cells, maintaining their functional metabolism in the VBNC state and enhancing their survival ability under low temperatures.
Construction of Quantitative Structure Activity Relationship (QSAR) Models to Predict Potency of Structurally Diversed Janus Kinase 2 Inhibitors
Authors: Simeon Saw , Jongkon Nathjanan
Published: December 2019

Janus kinase 2 (JAK2) inhibitors represent a promising therapeutic class of anticancer agents against many myeloproliferative disorders. Bioactivity data on pIC 50 of 2229 JAK2 inhibitors were employed in the construction of quantitative structure-activity relationship (QSAR) models. The models were built from 100 data splits using decision tree (DT), support vector machine (SVM), deep neural network (DNN) and random forest (RF). The predictive power of RF models were assessed via 10-fold cross validation, which afforded excellent predictive performance with R 2 and RMSE of 0.74 ± 0.05 and 0.63 ± 0.05, respectively. Moreover, test set has excellent performance of R 2 (0.75 ± 0.03) and RMSE (0.62 ± 0.04). In addition, Y-scrambling was utilized to evaluate the possibility of chance correlation of the predictive model. A thorough analysis of the substructure fingerprint count was conducted to provide insights on the inhibitory properties of JAK2 inhibitors. Molecular cluster analysis revealed that pyrazine scaffolds have nanomolar potency against JAK2.
Plant-Produced Anti-Enterovirus 71 (EV71) Monoclonal Antibody Efficiently Protects Mice Against EV71 Infection
Authors: Rattanapisit Kaewta , Chao Zhang , Siriwattananon Konlavat , Huang Zhong , Phoolcharoen Waranyoo
Published: December 2019

Enterovirus 71 (EV71) is the main causative agent of severe hand-foot-mouth disease. EV71 affects countries mainly in the Asia-Pacific region, which makes it unattractive for pharmaceutical companies to develop drugs or vaccine to combat EV71 infection. However, development of these drugs and vaccines is vital to protect younger generations. This study aims to develop a specific monoclonal antibody (mAb) to EV71 using a plant platform, which is a cost-effective and scalable production technology. A previous report showed that D5, a murine anti-EV71 mAb, binds to VP1 protein of EV71, potently neutralizes EV71 in vitro, and effectively protects mice against EV71 infection. Herein, plant-produced chimeric D5 (cD5) mAb, variable regions of murine D5 antibody linked with constant regions of human IgG1, was transiently expressed in Nicotiana benthamiana using geminiviral vectors. The antibody was expressed at high levels within six days of infiltration. Plant-produced cD5 retained its in vitro high-affinity binding and neutralizing activity against EV71. Furthermore, a single dose (10 µg/g body weight) of plant-produced cD5 mAb offered 100% protection against infection in mice after a lethal EV71 challenge. Therefore, our results showed that plant-produced anti-EV71 mAb is an effective, safe, and affordable therapeutic option against EV71 infection.
Removal of an Ethoxylated Alkylphenol by Adsorption on Zeolites and Photocatalysis with TiO2/Ag
Authors: Ucán Claudia Aguilar , Abatal Mohamed , Romero Carlos Montalvo , Franseschi Francisco Anguebes , Elias Miguel Angel Ramirez , Lozano Denis Cantú
Published: December 2019

Two advanced removal methods (adsorption and photocatalysis) were compared for the elimination of an ethoxylated alkylphenol (nonylphenol polyethylene glycol, NPEG). For the adsorption process, zeolites were used in their natural state, and the process was characterized by DRX (X-ray diffraction) and SEM–EDS (Scanning electron microscopy). The analysis of the results of the adsorption kinetics was carried out using different isotherms to interpret the removal capacity of zeolites. The Temkin kinetic model better predicted the experimental data and was satisfactorily adjusted to models of pseudo-second order (PSO). On the other hand, for photocatalysis, nano-particles of Ag (silver) were deposited on titanium oxide (TiO2) Degussa-P25 by photo-deposition, and the catalyst was characterized by diffuse reflectance and SEM–EDS. The data obtained using the two removal techniques were analyzed by UV–Vis (ultraviolet-visible spectrophotometry) and total organic carbon (TOC). The kinetic data were compared. The photocatalytic process showed the highest efficiency in the removal of NPEG, corresponding to >80%, while the efficiency of the adsorption process was <60%. This was attributed to the recalcitrant and surfactant nature of NPEG.
Preparation of KOH and H3PO4 Modified Biochar and Its Application in Methylene Blue Removal from Aqueous Solution
Authors: Liu Li , Li Yang , Fan Shisuo
Published: December 2019

Improperly treated or directly discharged into the environment, wastewater containing dyes can destroy the quality of water bodies and pollute the ecological environment. The removal of dye wastewater is urgent and essential. In this study, corn stalk was pyrolyzed to pristine biochar (CSBC) in a limited oxygen atmosphere and modified using KOH and H3PO4 (KOH-CSBC, H3PO4-CSBC, respectively). The biochars were characterized by surface area and pore size, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), as well as their behavior in adsorbing methylene blue (MB). Results indicated that the pore structure of CSBC became more developed after modification by KOH. Meanwhile, H3PO4-CSBC contained more functional groups after activation treatment. The pseudo-second-order kinetic and the Langmuir adsorption isotherm represented the adsorption process well. The maximum MB adsorption capacity of CSBC, KOH-CSBC, and H3PO4-CSBC was 43.14 mg g−1, 406.43 mg g−1 and 230.39 mg g−1, respectively. Chemical modification significantly enhanced the adsorption of MB onto biochar, especially for KOH-CSBC. The adsorption mechanism between MB and biochar involved physical interaction, electrostatic interaction, hydrogen bonding and π–π interaction. Hence, modified CSBC (especially KOH-CSBC) has the potential for use as an adsorbent to remove dye from textile wastewater.
Transport-Layer Limitations for NFV Orchestration in Resource-Constrained Aerial Networks
Authors: Gonzalez Luis F. , Vidal Ivan , Valera Francisco , Nogales Borja , Sanchez-Aguero Victor , Lopez Diego R.
Published: November 2019

In this paper, we identify the main challenges and problems related with the management and orchestration of Virtualized Network Functions (VNFs) over aerial networks built with Small Unmanned Aerial Vehicles (SUAVs). Our analysis starts from a reference scenario, where several SUAVs are deployed over a delimited geographic area, and provide a mobile cloud environment that supports the deployment of functions and services using Network Functions Virtualization (NFV) technologies. After analyzing the main challenges to NFV orchestration in this reference scenario from a theoretical perspective, we undertake the study of one specific but relevant aspect following a practical perspective, i.e., the limitations of existing transport-layer solutions to support the dissemination of NFV management and orchestration information in the considered scenario. While in traditional cloud computing environments this traffic is delivered using TCP, our simulation results suggest that using this protocol over an aerial network of SUAVs presents certain limitations. Finally, based on the lessons learned from our practical analysis, the paper outlines different alternatives that could be followed to address these challenges.
Probability-Based Indoor Positioning Algorithm Using iBeacons
Authors: Wu Tianli , Xia Hao , Liu Shuo , Qiao Yanyou
Published: November 2019

High-precision indoor positioning is important for modern society. This paper proposes a way to achieve high positioning accuracy and obtain a trajectory close to the actual path in a common application scenario by smartphone without the use of a complicated algorithm. In the actual positioning process, a stable signal source can reduce the signal interference caused by environments. Bluetooth low energy has its own advantages in indoor positioning because it can be seen as a more stable signal source. In this study, we used smartphones to record the changing Bluetooth signals and used a basic nearest neighbor, weight centroid, and probability-based method, which we called an advanced weighted centroid method, to obtain position coordinates and the motion trajectory during the experiment. We used a weight centroid method based on least squares to solve the overdetermined problem. This can also be used to calculate the initial position of the advanced weight centroid. The advanced weighted centroid method introduced a Gaussian distribution to model the distribution of the signal. Translating a deterministic problem into a fuzzy probability problem aligns more with positioning facts and can achieve better results. Experimental results showed that the root-mean-square error (RMSE) of the dynamic positioning result obtained through the probabilistic method was within 1 m and had a more consistent trajectory. Moreover, the impact of the number of iBeacons on the positioning accuracy has been discussed, and a reference for iBeacon placement has been provided. In addition, an experiment was also conducted on the effect of signal transmission frequency on accuracy.
Analysis of the Spatial and Temporal Evolution of Land Cover and Heat Island Effects in Six Districts of Chongqing’s Main City
Authors: Lang Qin , Yu Wenping , Ma Mingguo , Wen Jianguang
Published: November 2019

The urban heat island effect has always been one of the hottest issues in urban development. In this study, Landsat images from the summers of 2001, 2004, 2009, 2014 and 2018 were used to identify land cover type in six districts of Chongqing’s main city. Land cover was categorized as water, vegetation or impervious surface with the object-oriented method. Land surface temperature (LST) data was calculated with the atmospheric radiation transfer equation method, and was then divided into different heat island intensity grades. Next, the spatial and temporal changes in land cover type and heat island effect were analyzed in the six districts. Center migration analysis and heat island coefficients were used to quantitatively reflect the spatiotemporal evolution relationship between land cover and heat island effect. All six districts exhibited a trend of expanding impervious surface, with a 419.38% increase from 2001 to 2018, and shrinking vegetation, with a 17.81% decrease from 2001 to 2018. Also from 2001 to 2018, Yuzhong District had the most significant heat island effect, with a heat island coefficient 0.35 higher than the mean value of the whole study area. The impervious surface center migrated in different directions in each district. Both the direction and the corresponding velocity of the impervious surface and heat island centers were tightly correlated, with a correlation coefficient of 0.53. Relative heat island coefficients (the difference from the mean) of water ranged from −2.08 to −1.17 in different districts. That of impervious surface ranged from 1.60 to 1.93, and that of vegetation ranged from −0.22 to 1.09. The internal heterogeneity of land cover and heat island effect in Chongqing’s main city was huge. This study quantitatively analyzed the evolution of the heat island effect in the study area to help provide each district with some targeted suggestions for future urban planning.
Application of Micro Quartz Tuning Fork in Trace Gas Sensing by Use of Quartz-Enhanced Photoacoustic Spectroscopy
Authors: Lin Haoyang , Huang Zhao , Kan Ruifeng , Zheng Huadan , Liu Yihua , Liu Bin , Dong Linpeng , Zhu Wenguo , Tang Jieyuan , Yu Jianhui , Chen Zhe , Tittel Frank K.
Published: November 2019

A novel quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor based on a micro quartz tuning fork (QTF) is reported. As a photoacoustic transducer, a novel micro QTF was 3.7 times smaller than the usually used standard QTF, resulting in a gas sampling volume of ~0.1 mm3. As a proof of concept, water vapor in the air was detected by using 1.39 μm distributed feedback (DFB) laser. A detailed analysis of the performance of a QEPAS sensor based on the micro QTF was performed by detecting atmosphere H2O. The laser focus position and the laser modulation depth were optimized to improve the QEPAS excitation efficiency. A pair of acoustic micro resonators (AmRs) was assembled with the micro QTF in an on-beam configuration to enhance the photoacoustic signal. The AmRs geometry was optimized to amplify the acoustic resonance. With a 1 s integration time, a normalized noise equivalent absorption coefficient (NNEA) of 1.97 × 10−8 W·cm−1·Hz−1/2 was achieved when detecting H2O at less than 1 atm.
HIV-1 Latency and Latency Reversal: Does Subtype Matter?
Authors: Sarabia Indra , Bosque Alberto
Published: November 2019

Cells that are latently infected with HIV-1 preclude an HIV-1 cure, as antiretroviral therapy does not target this latent population. HIV-1 is highly genetically diverse, with over 10 subtypes and numerous recombinant forms circulating worldwide. In spite of this vast diversity, much of our understanding of latency and latency reversal is largely based on subtype B viruses. As such, most of the development of cure strategies targeting HIV-1 are solely based on subtype B. It is currently assumed that subtype does not influence the establishment or reactivation of latent viruses. However, this has not been conclusively proven one way or the other. A better understanding of the factors that influence HIV-1 latency in all viral subtypes will help develop therapeutic strategies that can be applied worldwide. Here, we review the latest literature on subtype-specific factors that affect viral replication, pathogenesis, and, most importantly, latency and its reversal.
Proses Pratanak dan Teknik Penggilingan untuk Mempertahankan Mutu Beras Merah (Oryza nivara)
Authors: Binalopa Thitin
Published: November 2019

Salah satu alternatif untuk meningkatkan mutu fisik beras adalah dengan mengolah gabah secara pratanak. Beras pratanak merupakan proses perendaman gabah dan pengukusan dengan uap panas yang dapat mempengaruhi mutu beras pratanak dan menghindari kerusakan beras pada saat penggilingan. Penelitian ini bertujuan untuk mengkaji pengaruh proses pratanak dan teknik penggilingan terhadap kandungan antosianin dan mutu beras merah. Tahapan penelitian dimulai dengan pembuatan beras pratanak dilanjutkan ke tahap penggilingan dengan konfigurasi giling yaitu husker satu kali (1H), husker dua kali (2H), husker satu kali polisher satu kali (1H1P) dan husker dua kali polisher satu kali (2H1P) kemudian dilakukan tahap uji karakteristik yang meliputi mutu fisik beras pratanak, rendemen beras, dan kadar antosianin. Hasil penelitian menunjukkan bahwa rendemen beras pratanak dengan konfigurasi penggilingan husker satu kali (1H) tertinggi yaitu 78.09­%. Proses perendaman dan penyosohan beras merah pratanak menyebabkan penurunan kandungan antosianin. Penurunan kandungan antosianin beras merah pratanak dan konfigurasi giling husker satu kali (1H), husker dua kali (2H), husker satu kali polisher satu kali (1H1P), dan husker dua kali polisher satu kali (2H1P) adalah masing masing 24.96 mg/100g, 22.86 mg/100g, 21.77 mg/100g, dan 17.18 mg/100g dibanding perlakuan kontrol (tanpa pratanak) 30.87 mg/100g. Kehilangan kandungan antosianin pada beras merah dapat diminimalkan dengan memperhatikan proses penyosohan beras merah.kata kunci: Beras pratanak, kadar antosianin, mutu beras merah
Celtic motifs in the late classical and Hellenistic toreutics of North Pontic area
Authors: Treïster Mikhail Iou
Published: December 2019

The author discussed some find of the IVth-IInd century B.C. jewelry in Kuban basin in South Russia. The find of a gold stamped plaque in shape of a male head, reflecting the typical motif of Early La-Tène art, in a tumulus near stanitsa Ivanovskaya in Kuban basin suggests the penetration of the motifs of Celtic art in distant periphery of antique world in the kingdom of Bosporus already in the IVth century B.C., i.e. before the well known after literary and archaeological sources evidence of the Celtic penetration in North Pontic area. It was due to the fact that since the first half of the IVth century B.C. the Celts were hired as mercenaries, first by the Dionysius I, the king of Syracuse. With the broad use of mercenaries in Greek armies the soldiers, also barbarian, with their own amunition and armaments, may had found their way in distant parts of oikumene. The possibility of the Celts penetration via South Italy seems to be indirectly proved by the complex find at Sergievskaya of the helmet of Etrusco-Italic type and two small “phalerae” with the design, having prototype among the Celtic and South Italian antiquities of the IVth century B.C. It seems also that some other peculiar motifs in the Hellenistic toreutics of Kuban basin (eight-shaped fibulae) also reflect the influence of the IVth-IIIrd century B.C. Celtic art.
Notes on words in early Irish glossaries
Authors: Russell Paul
Published: December 2019

Note sur trois mots tirés des glossaires irlandais anciens.

1. Analyse de íarus par le préverbe íar suivi d’un pronom suffixé, extrait d’une forme verbale. Conséquences de cette interprétation pour des mots similaires, comme forthus etc.

2. Edition de la version courte de la notice imbas for-osnai, dans le glossaire Dúil Dromma Cetta (DDC) ; l’auteur démontre que c’est la source de la version amplifiée transmise par le Glossaire de Cormac.

3. Examen de la signification de lúathrinde, d’après la notice Coire Brecáin du Glossaire de Cormac, en relation avec les techniques du dessin.
Le toponyme breton Penhep : pen + eb «tête de cheval» ou pen + keb «tête de colline» ?
Authors: Hughes A. J.
Published: December 2019

L. Fleuriot était tenté d’analyser le toponyme Penhep (Finistère) comme un composé pen «tête» + *ep «cheval». Il y aurait un parallèle exact en irlandais, Cenn Eich (Hogan), cf. br. Penterc’h, gall. Pentyrch, et v.irl. Cenn Tuirc «tête de sanglier». Et d’autres noms bretons de même signification, Penmarc’h, Cap Cavai «tête de cheval». Mais Fleuriot avait insisté sur la nécessité, dans ce cas, de démontrer que le -h-n’était pas étymologique. Or cet h est en fait prononcé, [pen’hep], on doit donc considérer Penhep comme contenant, plutôt, pen (suivi de mutation spirante) + un k- initial, vraisemblablement kep, kap «colline».
La sixième demande du « Notre Père » et le livre des Jubilés
Authors: Philonenko Marc
Published: November 2019

Le texte grec d'un passage des Jubilés, conservé par un chroniqueur byzantin, Georges le Syncelle, révèle l'arrière-plan de la sixième demande du «Notre Père» et en autorise une interprétation nouvelle.
Knowledge and Behaviors of Industrial Radiography Workers about Radiation Protection
Authors: YILDIZ Abdulkadir , PEKEY Hakan
Published: December 2019

In our day, radiation sources have been used for useful purposes in industrial fields, but unrestrained and unconscious usage of radiation sources can be fatal. In this study, a survey has been shared online with 65 industrial radiography workers in order to assess their knowledge and behaviors towards radiation protection. The Cronbach's alpha coefficient of 0.85 demonstrated good reliability of the questionnaire. Of the participants, 53.8% had high school diploma and 29.2% had bachelor’s degree. The majority of workers (98.5%) was male and 43% of them had 11 years and more experience. The maximum percentages of industrial radiography workers’ knowledge about radiation safety basic concepts such as three basic principles of radiation protection, collimator, dosimeter usage in working condition A and effective dose were 95.4%, 93.9%, 93.8% and 90.8%, respectively. 65 participants (100%) agreed the definition as “I check radiography device and auxiliary equipment before the work commences”. 98.4% of the workers stated that they restricted the working area by using radiation warning signs and flashlights during the radiographic test. While working with radioactive sources, personnel must wear special PPE (Personal Protective Equipment) such as; lead gloves, lead glasses, lead apron, gonad and thyroid protection equipment etc.57% of radiographers (37) stated that they have been using the special PPE’s during the work. About 40% of responding workers (24) stated that they have not been using and 3% of them (4) stated that they have no idea about the usage of special PPE. Finally, survey results indicated that most of the radiographers who are occupationally exposed to radiation have a good knowledge and behaviors. However, some of them need to be trained about special radiation PPE usage.
Tuning Superhydrophobic Materials with Negative Surface Energy Domains
Authors: Wu Zhongzhen , Liu Liangliang , Li Shunning , Ji Shunping , Chen Pinghu , Cui Suihan , Ma Zhengyong , Weng Yuchang , Huang Qian , Wu Zhongcan , Wu Hao , Lin Yuan , Fu Ricky K. Y. , Lin Hai , Tian Xiubo , Chu Paul K. , Pan Feng
Published: December 2019

Hydrophobic/superhydrophobic materials with intrinsic water repellence are highly desirable in engineering fields including anti-icing in aerocrafts, antidrag and anticorrosion in ships, and antifog and self-cleaning in optical lenses, screen, mirrors, and windows. However, superhydrophobic material should have small surface energy (SE) and a micro/nanosurface structure which can reduce solid-liquid contact significantly. The low SE is generally found in organic materials with inferior mechanical properties that is undesirable in engineering. Intriguingly, previous theoretical calculations have predicted a negative SE for
θ
-alumina (
θ
-Al
2
O
3
), which inspires us to use it as a superhydrophobic material. Here, we report the experimental evidence of the small/negative SE of
θ
-Al
2
O
3
and a
θ
-Al
2
O
3
-based superhydrophobic coating prepared by one-step scalable plasma arcing oxidation. The superhydrophobic coating has complete ceramic and desired micro/nanostructure and therefore exhibits excellent aging resistance, wear resistance, corrosion resistance, high-temperature tolerance, and burning resistance. Owing to the rarity of the small/negative SE in inorganic materials, the concept to reduce SE by
θ
-Al
2
O
3
may foster a blowout to develop robust superhydrophobicity by complete inorganic materials.
The Theme of Partition in Bapsi Sidhwa's Ice Candy Man
Authors: Ponmalar SK
Published: December 2019

Bapsi Sidhwa in her novel, Ice CandyMan  focuses on the theme of partition of India along with several other themes like the tragic tales of uprooting wonderful dreams of Ranna and Ayah, enormous vacuity of lifeless air that fills the streets of Lahore and the betrayal of human trust. They are all linked with partition phenomenon which left a permanent scar on the memory of India's history. Though everyone seems to be affected by both political and religious horros, very few writers have written about it. Bapsi Sidhwa is one among them. With her artistic vision, she sweeps into a historically significant event of the division of nation.
Students’ Challenges to Speak EFL Skills: A Comparative Study Focused on Selected Private & State Elementary Schools of Wolaita Zone, Ethiopia
Authors: Wodebo Amanuel Yonas
Published: December 2019

Background: Mastering English speaking skills can not only bring people to be able to communicate with others, but also bring positive impact on students’ academic performance.

Objective:, The main purpose of this comparative study was to investigate into grade 8 students’ challenges of academic performance in EFL speaking skills.

Methods: Each school of the targeted grades had 3 sections which encompassed 50 students. The informants therefore were sampled students and all EFL teachers. Thus, systematic sampling technique was employed to select 24 informants among the whole population of 300 students. Whereas, the EFL teachers, which were 4 in the year 2019 G.C., comprehensibly taken as participants of the study due to their manageable number of the entire population. A mixed research approach was employed via the tools questionnaire, interview and classroom observation. Then, quantitative data were analyzed in percentages; while qualitative were thematically organized and categorized in a form of statement.

Findings: Finally, conclusion and recommendations were drawn based on the findings which were underpinned in particular and common challenges that drew back students’ EFL oral skills in each school. Problems related to curriculum and stakeholders of the school to fulfil every facility were particular challenges affected state school students’ EFL speaking skills. However, problems related to teachers and teaching aids challenged private school students’ EFL speaking efficiencies. Meanwhile, Psychological and social factors commonly affected both of the institution students’ EFL speaking skills.

Conclusion and Recommendations: Therefore, the curriculum should consider EFL programs at first levels (grades 1-4) in all state schools. Besides, stakeholders of state schools should provide audiovisual materials and consider infrastructure. Training should be given for teachers as to   how to maneuver audiovisual materials and foster  EFL skills. Moreover, parents of the students should stay in touch with the schools’ community following up every performance of their children. On the other hand, private schools’ stakeholders should halt the flux of EFL teachers providing proportional incentives for their effort. Finally, teachers should encourage their students during practice and adapt fraternal approach.
HYBRID BATTERY-LESS LED DRIVER MENGGUNAKAN BOOST CONVERTER BERBASIS KONTROL PROPOSIONAL
Authors: Syafiuddin M.
Published: November 2019

The Government policy about energy management based on regulations of the Minister of Energy and Mineral Resources number 13 and 14 on 2012 concern saving of electricity use and energy management as a form of utilizing energy resources effectively, efficiently, and rationally, without reducing building functions should be an energy audit. So LED Driver is made in this prototype to utilize energy from photovoltaic without batteries for building lighting in the daytime, so besides saving in terms of load (LED) it is also saving energy sources. This paper will discuss LED drivers using photovoltaic (PV). The use of hybrid battery-less led drivers in this paper to increase the rate of savings electricity usage in buildings. Led drivers have the hybrid designed that can replace the PV power supply to the PLN power supply when the power generated by PV is less than nominal power. The output voltage of the LED is controlled by STM32F1 microcontroller using a boost converter. Experimental results in the field voltage generated by the LED driver is 195 Vdc. The power produced by the LED driver is 100 watts using 4 LED. And the value of the efficiency of the Boost converter reaches 92%.
PENCARIAN JALUR TERPENDEK DALAM PROSES AUTODOCKING PADA MOBILE ROBOT MENGGUNAKAN ARTIFICIAL BEE COLONY
Authors: Rifandi Safriudin , Sulistijono Indra Adji , Kuswadi Son
Published: November 2019

Proses autodocking pada mobile robot merupakan sebuah kemampuan tambahan yang dapat dimiliki oleh sebuah robot. Untuk dapat melakukan proses tersebut, robot terlebih dahulu harus dapat mencari tempat docking station terdekat. Selain itu, robot membutuhkan pemandu agar dapat menuju ke docking station terdekat dengan tepat dan aman. Untuk mendapatkan jalur terdekat, dibutuhkan posisi terakhir robot saat mendeteksi baterai dalam keadaan akan habis. Posisi robot tersebut sebagai masukan bagi artificial bee colony untuk menghasilkan jalur terdekat yang dapat memandu robot menuju docking station terdekat. Artificial bee colony digunakan sebagai optimasi pencarian tempat docking station yang jarak tempuhnya terdekat atau terpendek dari posisi robot serta aman dari halangan atau obstacle. Dari hasil percobaan, metode artificial bee colony mampu untuk mendapatkan jalur terpendek menuju lokasi docking station serta jalur yang didapatkan juga aman dari halangan. Jumlah populasi lebah yang digunakan sangat mempengaruhi jarak terdekat yang didapatkan oleh metode artificial bee colony. Semakin banyak populasi yang digunakan, maka semakin dekat jarak yang didapatkan oleh metode artificial bee colony. Jumlah iterasi juga mempengaruhi jarak terdekat yang didapatkan oleh artificial bee colony. Semakin banyak jumlah iterasi yang digunakan, maka semakin dekat jarak yang didapatkan meskipun jumlah populasi yang digunakan sama.
PENGARUH ARUS PENGELASAN TERHADAP KEKUATAN PADA PROSES LAS SMAW MENGGUNAKAN ELEKTRODA TYPE E6013
Authors: Pardi Pardi
Published: December 2019

Salah satu proses pengelasan yang banyak digunakan dalam kontruksi baja adalah proses SMAW (Shield metal arc welding). Salah satu komponen penentu kualitas sambungan proses ini adalah jenis elektoda. Sementara itu elektroda yang beredar dipasaran biasanya produsen merekomendasikan penggunaan arusnya dalam rentang amper tertentu, sehingga hal tersebut sering membuat welder yang tidak memiliki WPS kesulitan untuk memilih arus yang optimal. Dalam penelitian ini membahas tentang pengaruh besarnya arus pengelasan terhadap kekuatan las SMAW menggunakan Elektroda E6013. Pengelasan dilakukan menggunakan material mild steel ketebalan 8 mm dengan proses pengelasan SMAW tipe mesin las DC dengan variasi arus 50A, 60A, 70A, 80A dan 90A.  Jenis sambungan butt joint single V groove, dengan metode pengujian hasil lasan menggunakan visual test. Spesimen dilakukan uji bending untuk melihat hasil kekuatan sambungan las. Berdasarkan hasil pengujian pada jenis elektroda A didapat kekuatan uji bending tertinggi dengan nilai beban patah 12969,31N dilas menggunakan besar arus 90A. Sedangkan pada jenis elektroda B dengan didapat uji bending tertinggi dengan nilai beban patah 23398.83N dilas dengan arus 90A.
DIŞA AÇIKLIK VE ÇEVRESEL KİRLİLİK İLİŞKİSİ: TÜRKİYE ÖRNEĞİ
Authors: YILMAZ ŞAHİN Burcu , ORMAN Halit Levent , CEYLAN Servet
Published: December 2019

Ticari dışa
açıklık olarak bilinen ve dış ticaret hacminin genişlemesi ile ülkelere belirli
avantajlar sağlayan uluslararası ticaret kavramı, küreselleşmenin bir sonucu
olarak, küresel rekabeti de beraberinde getirmiştir. Özellikle gelişmekte olan
ülke (GOÜ)’ler, gelişmiş ülke (GÜ)’lerin gelir seviyelerine ulaşabilmek için, kirlilik
yaratan üretim yapılarını daha çok tercih etmektedir. Ancak kirli endüstrileri
tercih eden firmalar, yüksek gelir seviyelerine ulaşabilmek uğruna sosyal
maliyeti yüksek üretim yapılarına dönüşmüştür. Çalışmada gelişmekte olan bir
ülke olarak ele alınan Türkiye örneği için, dışa açıklık kavramının çevresel
kirlilik ile ilişkisinin yönü ve derecesi incelenmiştir. Bu amaçla 1980-2016
yılları arasındaki veri setini içeren zaman serisi analizinde ARDL modeli
kullanılmıştır. Çalışmadan elde edilen sonuçlara göre Çevresel Kuznets Eğrisi
ile ifade edilen Ters U biçimindeki fonksiyonun genel özelliklerini taşıyan
Türkiye örneği için, dışa açıklık kavramı çevre üzerinde olumsuz etki yaratma
sürecine devam etmektedir.
Análisis de la llegada de turistas internacionales a méxico
Authors: Conde Gaxiola Napoleón
Published: November 2019

Este trabajo es un análisis sobre el pronóstico de la demanda turística internacional en México entre 2013 y 2018, el cual señala las inconsistencias del actual modelo turístico mexicano y la necesidad de su superación. El método utilizado ha sido los modelos Autorregresivos Integrados de Medias Móviles (ARIMA), cuya eficacia ha sido demostrada en su liderazgo en tanto instrumento primordial de análisis económico y turismológico en los últimos cuarenta años. En el estudio se demuestra la escasa vitalidad y falta de dinamismo de la política turística mexicana, señalando su ineficiencia e incapacidad para
competir frente a otros mercados, la cual se expone de manera cuantitativa y cualitativa. También señala el agotamiento de las propuestas turísticas de los actores centrales del estado mexicano para dar cuenta de la nueva realidad internacional de la problemática del viaje y la hospitalidad.
PREDICTIVE MODELS OF ALOPECIA
AREATA PREVELENCE FORMING BASED ON THE CONTENT OF METALS IN
THE ENVIRONMENT OBJECTS
Authors: Setko N.P. , Nikolaeva T.V. , Voronina L.G.
Published: November 2019

The article presents data showing the effect of environmental factors on the prevelence of autoimmune
disorders, the example of alopecia areata. The results of mathematical modeling of the formation of this
dermatosis prevalence depending on the content of zinc, copper, nickel, chromium and lead in the
environment were described. It was found that an increase in the content of these metals in the soil
increases the likelihood of the formation of high levels of incidence of alopecia areata. However, the content
of the same metals in the air has no effect on the formation of prevelence of this autoimmune skin disease.
Using data on the content of zinc, copper, nickel, chromium and lead in the soil developed logit-model
allows us to predict the prevalence rates of alopecia areata and make appropriate management decisions.
EVALUATION OF CHILDREN PREVENTION
TECHNOLOGY PHYSICAL DEVELOPMENT DISORDERS AND MALNUTRITION
(E44-46) ASSOCIATED WITH EXPOSURE METALS (LEAD, MANGANESE, NICKEL,
CADMIUM, CHROMIUM)
Authors: Shtina I.E. , Luzhetsky K.P. , Ustinova O.Yu.
Published: November 2019

Violations of physical development and undernutrition in children (ICD: E44-46), living in conditions
of chronic the multimedia (air, drinking water), low-level exposure to a complex of metals (lead,
manganese, nickel, cadmium, chromium). The analysis of the effectiveness of prevention technologies in
children disorders of physical development and undernutrition (E44-46), associated with exposure to
lead, manganese, nickel, cadmium and chromium. Prove the high clinical efficacy of combined use of
drugs with an elimination, membrane stabilizing, antioxidant and neuroprotective action, with physical
therapy methods (TNCH inductothermy) and physical therapy.
SISTEM MONITORING PENGGUNAAN KOMPUTER STUDI KASUS LAB MULTIMEDIA SMK NEGERI 1 MERAUKE
Authors: Sumaryanti Lilik , Loppies Stanly H Dolpies
Published: November 2019

Pentingnya komputer bagi  sekolah yang digunakan untuk melakukan proses pembelajaran siswa- siswi di sekolah. Namum dalam penggunaan komputer di sekolah guru sangat sulit untuk memontiorimg siswa-siswa sehingga perluh di buatkan sebuah sistem  untuk melakukan monitoring penggunaan komputer yang ada didalam lab agar guru dapat  melihat  proses  pembelajaran siswa-siswi yang sedang  berjalan apakah  sudah sesuai dengan  instruksi yang diberikan guru dan sistem ini juga dapat melihat dan mengabsen siswa yang masuk pada jam pelajaran praktikum dan proses pembelajran lainya yang menggunkan lab  komputer.Pengumpulan data yang dilakuakan pada penelitian ini adalah observasi, wawancara dan dokumentasi yang dikumpulkan yaitu profil sekolah, data guru-guru , data siswa-siswi dan jadwal pembelajaran yang  ada di SMK negeri 1 merauke pembuatan sistem monitoring ini menggunakan borland delpi 7 serta menngunakan metode pengujian blackbox dan skenario pengujian dengan bahasa pemograman MySQIL sebagai manajemen pembuatan basis data.Berdasrkan hasil perancangan serta hasil implementasi dan hasil pengujian sistem menggunkan pengujian blackbox bahwa sistem yang dibuat sudah  sesuai dengan kebutuhan fungsional pengguna yang diminta oleh karena itu sistem monitoring penggunaan lab multimedia  sudah bisa digunakan.
EKSTENSI DINAMIKA DIALEKTIKA INTERPERSONAL PADA RELASI ANTARA DEPARTMENT MEDIA & PUBLIC RELATIONS INASGOC DENGAN MEDIA DI 18th ASIAN GAMES INVITATION TOURNAMENT
Authors: Putri Maudi Sabila Nadhira , Boer Rino F
Published: November 2019

Relasi antara perusahaan dan media selalu penuh dinamika selayaknya hubungan interpersonal antara dua manusia. Ketegangan dan dialog selalu terjadi dalam perdebatan tentang keterbukaan informasi yang (selalu) diharapkan media sementara perusahaan memperhatikan kerahasiaan informasi demi keberlangsungan perusahaaan dalam jangka panjang. Keinginan kuat untuk menjalin relasi yang saling menguntungkan dengan media bertemu dengan kepentingan untuk tetap dapat saling menghargai otoritas masing-masing juga kerap kali mewarnai ketegangan dan dialog diantara media dan perusahaan. Kondisi ini semakin jelas terlihat apalagi ketika sedang mempersiapkan sebuah event internasional. Apakah ketegangan dan dialog yang biasanya mewarnai hubungan interpersonal dapat digunakan dalam mengkaji relasi antara perusahaan dan media? Bagaimana bentuk ketegangan dan dialog yang mewarnai relasi antara departemen Media PR dengan media itu terjadi? Khususnya dalam kegiatan Invitation Tournament yang berada dalam rangkaian persiapan Asian Games 2018 di Jakarta. Penelitian ini menggunakan pendekatan penelitian kualitatif dengan metode penelitian studi kasus yang menggunakan wawancara mendalam dan studi pustaka sebagai teknik pengumpulan data. Konsep dasar yang digunakan adalah teori dinamika dialektika relasional menurut Baxter dan Barbara Montgomery yang dibuat pada tahun 1996, yang mengasumsikan bahwa dalam suatu hubungan pasti terdapat ketegangan-ketegangan. Hasil penelitian menunjukkan adanya ketegangan dan kontradiksi pada relasi antara department Media & Public Relations Indonesia Asian Games Organizing Committee (INASGOC) dengan media yang berpartisipasi dalam 18th Asian Games Invitation Tournament seperti layaknya naik turunnya hubungan interpersonal antar individu. Kontradiksi yang terjadi dapat dilihat dari hasil analisis terhadap konsep Totality (totalitas), Contradiction (kontradiksi), Motion (pergerakan), dan Praxis (praksis). Disimpulkan bahwa di dalam sistem relasi antara perusahaan dan media, diperlukan intervensi eksternal untuk mengatasi ketegangan-ketegangan yang timbul dan dilakukan melalui sebuah proses dialog yang unik.
PERBANDINGAN TINGKAT PELAYANAN TERHADAP KONSUMEN INDOMARET DAN ALFAMART KAROMBASAN
Authors: Walangitan Mac Donald
Published: November 2019

Indomaret dan Alfamart  merupakan contoh bisnis retail di Indonesia yang merupakan market leader dibidangnya. Kedua perusahaan ini merupakan jaringan minimarket yang menyediakan kebutuhan pokok dan kebutuhan sehari-hari. Namun permasalah yang dihadapi Indomaret dan Alfamart adalah posisi mereka yang selalu berdekatan. Namun permasalahan tersebut bukan menjadi penghambat bagi keduanya. Hal tersebut diakibatkan oleh mereka berada pada pangsa pasar yang sama, menjual produk yang seragam serta berada dipusat keramaian. Tujuan penelitian ini adalah untuk mengetahui perbedaan tingkat pelayanan terhadap konsumen indomaret dan alfamart karombasan.Jenis penelitian ini adalah jenis penelitian komparatif dengan teknik analisis data uji beda. Data diperoleh dengan cara membagikan kuisioner pada 100 orang responden indomaret karomabsan dan 100 orang responden alfamart karombasan. Hasil penelitian menunjukkan bahwa terdapat perbedaan signifikan kualitas pelayanan terhadap konsumen Indomaret dan Alfamart di Karombasan dengan tingkat pelayanan yang paling baik adalah tingkat pelayanan Indomaret Karombasan. Indomaret Karombasan harus mempertahankan kualitas pelayanan yang sudah diterapkan selama ini agar supaya konsumen akan merasa nyaman dan terus melakukan keputusan pembelian di Indomaret Karombasan. Alfamart sebaiknya meningkatkan kualitas pelayanan terhadap konsumenKata Kunci :tingkat pelayanan, Indomaret, Alfamart
PENGARUH KOMITMEN ORGANISASIONAL, SISTEM INFORMASI AKUNTANSI, DAN PERAN AUDIT INTERNAL TERHADAP KUALITAS LAPORAN KEUANGAN
Authors: Nugroho Frasca Ardy , Setyowati Widhy
Published: November 2019

This study aims to analyze the effect of organizational commitment, accounting information systems, and the role of internal audit to the quality of the financial statements of Tegal District Government which consists of 150 respondents, data collection methods using questionnaires, data analysis methods using multiple linear regression analysis and data processing using SPSS application. From the results of the partial test, the organizational commitment variable gives a positive and significant effect to the quality of financial statements, as well as the accounting information system variable that gives a positive and significant effect to the quality of financial statements. The third variable, namely the role of the partially internal audit also gives a positive and significant influence on the quality of financial statements. Those variables simultaneously have a positive and significant influence on the quality of financial statements.
Data Cleaning in Knowledge Discovery Database-Data Mining (KDD-DM)
Authors:   Universiti Kuala Lumpur-Malaysian Institute of Information Technology, 50250 Kuala Lumpur, Malaysia, Rahman Fauziah Abdul , Kassim Rahimah ,   Universiti Kuala Lumpur-Malaysian Institute of Information Technology, 50250 Kuala Lumpur, Malaysia., Baharum Zirawani ,   Universiti Kuala Lumpur-Malaysian Institute of Information Technology, 50250 Kuala Lumpur, Malaysia, Noor Helmi Adly Mohd ,   Universiti Kuala Lumpur-Malaysian Institute of Information Technology, 50250 Kuala Lumpur, Malaysia, Haris Norhaidah Abu ,   Universiti Kuala Lumpur-Malaysian Institute of Information Technology, 50250 Kuala Lumpur, Malaysia
Published: November 2019

Data quality is a main issue in quality information management. Data quality problems occur anywhere in information systems. These problems are solved by Data Cleaning (DC). DC is a process used to determine inaccurate, incomplete or unreasonable data and then improve the quality through correcting of detected errors and omissions. Various process of DC have been discussed in the previous studies, but there is no standard or formalized the DC process. The Domain Driven Data Mining (DDDM) is one of the KDD methodology often used for this purpose. This paper review and emphasize the important of DC in data preparation. The future works was also being highlight.
Some Derived Sequences of k-Jacobsthal and k- Jacobsthal Lucas
Authors:   Department of Mathematics, PGP College of Arts and Science, Namakkal. Tamilnadu, India., Ragunathan T. , Srividhya G. ,   Department of Mathematics, Government Arts College, Trichy-22, Tamilnadu, India.
Published: November 2019

In this article we present incredible associated some derived sequences of 𝒌 - Jacobsthal and 𝒌 - Jacobsthal Lucas numbers and we give Diophantine triples for (𝒂,𝒃,𝒄) with the property 𝑫(𝒋𝒌,𝒏−𝟏𝟐).
Video Data Retrieval using Image Color Histogram Technique
Authors:   Faculty of Operations & IT, ICFAI Business School (IBS), Hyderabad, Saravanan D. , Surendiran J. ,   Professor, HKBKCE, Bangalore.
Published: November 2019

In this paper, a subspace-based multimedia data-mining framework is proposed for video semantic analysis; specifically Current content management systems support retrieval using low-level features, such as motion, color, and texture. The proposed frameworks achieves full automation via a knowledge-based video indexing and retrieve an appropriate result, and replace a presented object with the retrieval result in real time. Along with this indexing mechanism a histogram-based color descriptors also introduced to reliably capture and represent the color properties of multiple images. Including of this a classification approach is also carried out by the classified associations and by assigning, each of them with a class label, and uses their appearances in the video to construct video indices. Our experimental results demonstrate the performance of the proposed approach.
Energy Efficient Resource Allocation in Cloud Computing
Authors:   Department of CSE, Malla Reddy College of Engineering, Hyderabad India, Kumari Mrs. Ch Vijaya , Aharonu Mr. M ,   Department of CSE, Malla Reddy College of Engineering, Hyderabad India, Sunil Dr. T. ,   Department of CSE, Malla Reddy College of Engineering, Hyderabad India.
Published: November 2019

Cloud service provider in cloud environment will provide or provision resource based on demand from the user. The cloud service provider (CSP) will provide resources as and when required or demanded by the user for execution of the job on the cloud environment. The CSP will perform this in a static and dynamic manner. The CSP should also consider various other factors in order to provide the resources to the user, the prime among that will be the Service Level Agreement (SLA), which is normally signed by the user and cloud service provider during the inception phase of service. There are many algorithm which are used in order to allocate resources to the user in cloud environment. The algorithm which is proposed will be used to reduce the amount of energy utilized in performing various job execution in cloud environment. Here the energy utilized for execution of various jobs are taken into account by increasing the number of virtual machines that are used on a single physical host system. There is no thumb rule to calculate the number of virtual machines to be executed on a single host. The same can be derived by calculating the amount of space, speed required along with the time to execute the job on a virtual machine. Based up on this we can derive the number of Virtual machine on a single host system. There can be 10 virtual machines on a single system or even 20 number of virtual machines on single physical system. But if the same is calculated by the equation then the result will be exactly matching with the threshold capacity of the physical system[1]. If more number of physical systems are used to execute fewer virtual machines on each then the amount of energy consumed will be very high. So in order to reduce the energy consumption , the algorithm can be used will not only will help to calculate the number of virtual machines on single physical system , but also will help to reduce the energy as less number of physical systems will be in need[2].