bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis and characterization of polyaniline nanomaterials with different molar ratio of monomer
Authors: S Priyanka , N Dhachanamoorth , B Birundha
Published: November 2020

Formation of polymer nanomaterials are achieved by the process of polymerization and there was an availability of different methods such as chemical oxidative polymerization,electro chemical polymerization, In-situ oxidative polymerization and emulsion polymerization etc., Many monomers combine to form polymers under certain conditions by chemical reactions between the monomers. The chemical oxidative polymerization was most commonly used method to synthesize PANI and the synthesis process involved various molar ratio of aniline (0.1M, 0.2M, 0.3M) in which APS was used as an oxidant with dopant of HCl. This study revealed that the properties changed based on their initial conditions. The prepared aromatic polyaniline was characterized by FT-IR, UV-VIS,Particle size analyzer techniques and anti-bacterial activity of the sample was analyzed.FT-IR spectroscopy gives deep view of many  functional groups that were present in a system by measuring vibrational frequencies of chemical bonds involved. UV-VIS was a good tool to identify, characterize and to study the optical properties of nanomaterials.In particle size analyzer, the size of a particle was measured using the instrument laser diffraction particle size analyzer (SALD-2300). The synthesized polyaniline had the tendency to resist the growth of both gram positive and gram negative bacteria. These organic conducting polymers were sometimes called “smart polymers” and have varies application in medical, OLED, solar cell, batteries and sensor etc.,
Ethylene glycol– assisted synthesis of n-HAp and MagnesiumHAp nanocomposites
Authors: Sri Devi P  , Deepika G
Published: November 2020

Biomaterials were derived from nature and also it can be synthesized by chemical processes which can be utilized as metallic components, ceramics or composite materials. Nano Hydroxyapatite [n-HAp], a milky white coloured powder with calcium and phosphate ions stoichiometric ratio is 1.67. It was mainly used as bone and teeth fillers. The n-HAp [Ca10 (PO4)6(OH)2] was prepared by sol-gel method, as it is known to be a simple economic technique which suits for industrial or large scale production.During precipitation, the grain growth may occur. In order to avoid this, Ethylene Glycol (EG) was used as a capping agent in synthesis of HAp nanoparticles and Magnesium HAp nanocomposites. The synthesized n-HAp and Magnesium HAp nanocomposites were characterized using SEM, XRD, EDAX, FTIR and Antibacterial activity in order to analyze its structure, elemental composition and functional group.
Influence of annealing temperature on optical, chemical and particle size properties of polyaniline nanomaterial
Authors: Dhachanamoorthi N  , Haripriya S
Published: November 2020

Polyaniline is a representative conducting polymer because of its high electrical conductivity in doped state and it’s used in various fields of science and engineering because of its unique characteristics. Polymers are playing a dominant role in many areas such as material sciences, textile industries and chemical industries. Monomers of aniline are combined together to form a polymer of polyaniline by chemical oxidative polymerization method. The process of synthesis includes 1.5 M of aniline (C6H5N) as main reagent which causes chemical reaction, Sulfuric acid (H2SO4) as a dopant which alters its original electric and optical properties and Ammonium Peroxydisulfate (APS) as an oxidant which has the ability to oxidize and accept electrons. The synthesized nanoparticles are subjected to heating process at two different temperatures (200˚C and 400˚C). The prepared polymer material is characterized by UV-Visible Spectroscopy,Fourier Transform Infra-Red Spectroscopy, Particle Size Analyzer and antibacterial activity. The electron transition from ground state to excited state was revealed by UVVis Spectroscopy. Polymeric materials are identified using FTIR spectroscopy and it also exhibits the chemical bonds and structure of the sample. Particle Size Analyzer represents the mean size of the polyaniline sample. The overwhelming potential application of polyaniline includes manufacturing of circuit board, corrosion resistance, and fabrication of smart textiles.
Multifaceted Chemistry Conceptual Profile of Selected Senior High School STEM Students from a Private School in Manila
Authors: Carvajal Rick Jasper A.
Published: November 2020

Chemistry has always been identified as a discipline with pluralistic characteristics. This implies that chemistry can be viewed differently based on one’s conception, conceptual model, and conceptual change. Subsequently, this denotes into a diverse context, different profiles of conceptions, which then convey multifaceted view of the discipline. The polysemous view of chemistry was addressed and proposed into six chemistry conceptual profile zones - monist, epistemic, processual, pragmatic, aversive, and attractive. There is a need to recognize this and structure chemistry education based on conceptual profile, since the discipline is naturally complex, rich, and multifaceted. The objective of the study is to analyze, identify, and categorize the multifaceted conceptions in chemistry of selected senior high school STEM students enrolled in a certain private school in Manila City, under these six conceptual profile zones. More so, the study aims to determine the possible ways to improve the conceptions of students based on their own response and perspective. Descriptive qualitative research design through semantic thematic analysis and statistical inference using Chi-square of Goodness-of-Fit were employed to analyze the data. The result revealed that almost all of these (n=57) selected SHS STEM students can conceptualize the epistemic view in the profile zone but not the other five. Based on the two themes generated, it can be implied that there is always an opportunity for critical reflection on how to reconceptualize the discipline and take chemistry into a more authentic field of science and science education.
Circadian rhythm and neurodegenerative disorders
Authors: Werdann Michelle , Zhang Yong
Published: November 2020

The circadian clock controls daily rhythms in animal physiology, metabolism, and behavior, such as the sleep‐wake cycle. Disruption of circadian rhythms has been revealed in many diseases including neurodegenerative disorders. Interestingly, patients with many neurodegenerative diseases often show problems with circadian clocks even years before other symptoms develop. Here we review the recent studies identifying the association between circadian rhythms and several major neurodegenerative disorders. Early intervention of circadian rhythms may benefit the treatment of neurodegeneration.
MERANGKAI WARNA: EKSPLORASI LARAS “PELOG” DALAM PERMAINAN ‘OUD ARABIS BERBASIS GARAPAN “WORLD MUSIC”
Authors: Harahap Irwansyah
Published: November 2020

ABSTRACT This writing generally discusses the term “world music” and various musical creative approaches that have been done. This writing also descriptively reviews the composition of “Merangkai Warna” in the context of melodist’s idea, instrument, concept building, and musical practice in musical composition. The musical composition “Merangkai Warna” is a musical composition inspired from the conception of world music. This composition is a form of musical exploration, namely through a set of musical instrument ‘oud Arabis, it tried to fuse and synthesize musical idioms and aesthetics via the composition of pentatonic playing style found in the area of musical era in Asia. In this composition, there is a concept of a new rhythm play called as “hetero-poly-metric rhythmic structure,” in which the basis of rhythmical play is built on metrical 7 contra 3 pattern applied in the percussion play of kendangan Sunda and ’oud. Keywords: World music, pelog, pentatonic, hetero-poly-metric rhythmic structure  ABSTRAK Tulisan ini membicarakan secara umum tentang istilah “world music” dan berbagai pendekatan kreatif musikal yang telah dikerjakan. Tulisan ini juga mengulas secara deskriptif karya komposisi “Merangkai Warna” dalam konteks gagasan kompositoris, instrumetarium, bangunan konsep, dan praktik musikal dalam karya musik. Komposisi musik “Merangkai Warna” merupakan sebuah garapan musik berangkat dari konsepsi musik dunia (world music).  Karya ini merupakan sebuah bentuk eksplorasi musikal dimana melalui perangkat alat musik ‘oud Arabis mencoba untuk memfusikan dan mensintesiskan idiom dan estetika musik lewat garapan gaya permainan modus pentatonik yang terdapat di wilayah peradaban musik di Asia. Dalam karya komposisi ini tertuang satu konsep permainan ritme baru, yang disebut dengan “hetero-poly-metric rhythmic structure,” dimana dasar permainan ritmikal dibangun dari pola metrikal 7 kontra 3 yang dituangkan dalam permainan perkusi kendangan Sunda  dan ’oud. Kata Kunci: World music, pelog, pentatonic, hetero-poly-metric rhythmic structure
HARMONIZING RELATIONSHIPS OF CENTRAL GOVERNMENT AND REGIONAL GOVERNMENTS IN SHARE DIVESTMENT OF MINING COMPANIES
Authors: Tiopan Demson
Published: November 2020

Menurut Pasal 1 angka 8 Peraturan Pemerintah  No. 23 Tahun 2010 tentang Pelaksanaan Kegiatan Usaha Pertambangan Mineral dan Batubara, divestasi saham adalah jumlah saham asing yang harus ditawarkan untuk dijual kepada peserta Indonesia.Upaya divestasi saham ini dilakukan sepenuhnya oleh pemeritah pusat tanpa melibatkan pemerintahan daerah yang menjadi daerah eksplorasi perusahaan tambang.Berlakunya sikap pemerintah pusat kepada pemerintah daerah yang tidak mencerminkan tujuan hukum dalam upaya divestasi saham perusahaan tambang . Penulisan Paper ini menggunakan metode penelitian hukum normatif yaitu dengan meneliti pada data sekunder bidang hukum yang ada sebagai data kepustakaan dengan menggunakan metode berpikir deduktif dan kriterium kebenaran koheren. Untuk menganalisisnya permasalah ini penulis menggunakan teori tujuan hukum dari Gustav Radbruc  dikaitkan dengan sistem hukum yang dikemukakan oleh Lawrence Friedman. Penulis menemukan bahwa Norma hukum yang ada pada dasarnya tidak mengehendaki pembagian yang tidak adil akan tetapi di dalam norma-norma hukum yang lain terdapat ketentuan mengenai tindakan-tindakan khusus yang dapat dilakukan pemerintah pusat khususnya di dalam bidang pertambangan yang dapat dijadikan celah pemerintah pusat dalam memonopoli divestasi saham. Upaya hukum juga pada dasarnya mengupayakan sikap pemerintah pusat yang berimbang kepada pemeritnah daerah untuk memajukan masyarakat daerah.Penulis menyarankan bahwa legislatif harus membentuk undang-undang yang mengatur lebih detail mengenai divestasi saham yang dilakukan pemerintah pusat dimana juga megedepankan pemerintah daerah. Jika keuangan pemerintah daerah tidak mampu melakukan upaya divestasi saham perusahaan tambang seharunsya pemerintah wajib meberikan hibah divestasi sahamnya, walaupun pemerintah kehilangan sahamnya tetapi pada prinsipnya hibah tersebut digunakan untuk kemakmuran rakyat di daerah.
Geochemistry Evaluation and Oil to Source Rock Correlation of Lhokseumawe Area, North Sumatra Basin
Authors: Aditya M.
Published: November 2020

The purpose of this study was to evaluate the hydrocarbon source potential of the Middle Miocene Lower Baong Formation of the Lhokseumawe area and further attempt to establish a correlation of this possible source with the oil produced in the area by the mean of biomarkers analysis. Source rock characterization was realized by integrating several geochemical measurements including TOC, HI and Ro from the DY-1 and TM-1 wells. This has allowed us to define the organic content, maturity and kerogen type of the Lower Baong. Meanwhile, multiple produced oil samples from the area of interest were used to characterize their geochemical signature, based on a combination of isoprenoid, triterpane and sterane biomarkers, in an effort to determine maturity of those oils and the depositional environment of their source. This provides the basis of our attempt to correlate genetically oil and source rock in the Lhokseumawe area. The geochemical characterization of the Lower Baong suggest the formation to be an effective active source rock in the Lhokseumawe area with remaining average TOC of c1.5%, Kerogen Type II-III and maturity levels optimal for oil expulsion. Biomarker analysis of oils suggest an origin from a source facies deposited in open marine environment. Maturity level analysis using pentacyclic triterpane supports the source to be at peak maturity level. The correlation of oil with source rock supports largely that the Lower Baong oils are sourced by Lower Baong source facies of marine origin. However it worth noting that one oil family differs from this genetic correlation, opening speculation around other source facies to be active in the Lower Baong or an additional source interval to be active in the Lhokseumawe area. This could be interesting topic to be discuss in future.
ASSESSMENT OF BAKE PRODUCTS AT DEHRADUN
Authors: Deshwa Vishal Kumar , Sharma Lovely
Published: November 2020

In present study, local manufactured food products such as bread, pastry, bakery biscuits and one company product parle-G Biscuit were selected for microbial count and characterized the isolated contaminant on the basis of biochemical tests. In Local bread contained 2.86 x104 bacterial cells per gm, bakery biscuits find average 2.96x103 bacterial cells per gm and in pastry, and average 2.73 x103 bacterial cells per gm were present. But parle-G Biscuit did not contain any microorganism. Further, isolated contaminant were characterized by biochemical tests and observed that isolated strains were Bacillus spp., E. coil and Klebsiella spp.
EXPERIMENTAL STUDY AND ANALYSIS OF SOLAR AIR HEATER USING OF VARIOUS INLET TEMPERATURES
Authors: Vishwakarma Deeksha , Kale Jyoti
Published: November 2020

In this paper, we are make the experimental setup and assembled the various components such as, flats plate glass, wood, collector, inlet port and outlet port. The collector are generated the hot air with the help solar radiation. The collector are aching the air from inlet port and finally hot air are out through outlet port. We are measured the maximum outlet hot air Temperature in °C.
BIOCHEMICAL CHARACTERIZATION OF RECOMBINANT PHYTASE ENZYME (phyK) FROM Klebsiella sp. ASR1 ENCAPSULATED WITH ALGINATE
Authors: Hidayatullah Muhammad Eka , Sajidan . , Susilowati Ari , Mkumbe Baraka Stewart , Greiner Ralf
Published: November 2020

Karakterisasi Biokimia Enzim Fitase Rekombinan (phyK) dari Klebsiella sp. ASR1 Yang Dienkapsulasi Dengan AlginatEnzim fitase melepas molekul fosfor pada atom C dari benzena Inositol fitat. Tetapi fitase memiliki kelemahan tidak mampu bertahan terhadap kondisi ekstrim dalam lambung nonruminansia. Solusi dalam penelitian ini yaitu fitase dienkapsulasi menggunakan alginat. Penelitian ini bertujuan mengkarakterisasi fitase setelah dienkapsulasi menggunakan alginate. Hasil penelitian ini yaitu fitase yang dienkapsulasi memiliki aktivitas tertinggi pada pH 6,0, sedangkan fitase tanpa enkapsulasi pada pH 5,0. Suhu optimum untuk aktivitas tertinggi fitase yang dienkapsulasi yaitu 70ÂºC, sedangkan fitase tanpa enkapsulasi 37ÂºC. Untuk perlakuan penambahan ion logam, aktivitas tertinggi fitase yang dienkapsulasi terjadi dengan penambahan 0,1 mM Fe2+ dan 1,0 mM Ca2+, sedangkan fitase tanpa enkapsulasi dengan penambahan 0,1 mM Fe2+. Berdasarkan hasil penelitian ini, fitase yang dienkapsulasi memiliki keunggulan lebih banyak dibandingkan dengan fitase tanpa enkapsulasi, karena mampu bertahan pada pH dan suhu tinggi, dan beberapa efek ion logam.Kata Kunci: alginat, asam fitat, enkapsulasi, fitase, fitase rekombinanABSTRACTPhytase enzymes release phosphorus molecules on the C atom from benzene inositol phytate. But phytase has the disadvantage of being unable to withstand extreme conditions in the non-ruminant stomach. The solution in this research was phytase encapsulated using alginate. This study aims to characterize phytase after being encapsulated using alginate. The results of this study were the encapsulated phytase had the highest activity at pH 6.0, while the unencapsulated phytase at pH 5.0. The optimum temperature for the highest activity of the encapsulated phytase was 70ÂºC, while the unencapsulated phytase 37ÂºC. For treatment of metal ion addition, the highest activity of the encapsulated phytase occurred with the addition of 0.1 mM Fe2+ and 1.0 mM Ca2+, while the unencapsulated phytase with the addition of 0.1 mM Fe2+. Based on the results of this study, the encapsulated phytase had more advantages compared to the unencapsulated phytase, as the former withstand high pH and temperature, and some metal ion effects.
PERBANYAKAN AKASIA HIBRIDA (Acacia mangium Ã— Acacia auriculiformis) MELALUI SUBKULTUR BERULANG
Authors: Yelnititis Yelnititis , Sunarti Sri
Published: November 2020

In vitro culture is a promising technique for mass propagation of high-value species. Study of propagation for Acacia hybrid (A. mangium x A. auriculiformis) through this technique has been conducted using single node stem from seedlings as explants. Growth medium used was modified Murashige and Skoog (MS), basal medium Woody Plant Medium (WPM), and Gamborg (B5) supplemented. The study was conducted in two stages, namely shoot induction and shoot multiplication. The treatment tested was the Benzyl Adenine (BA) supplementation at the concentration of 0.3; 0.7; and 1.0 mgL-1 of. Observation was conducted on the frequency of shoot induction, number of shoot, shoot length and visual performance of the culture. The result showed that treatment of BA 0.7 mgL-1 on modified MS medium is the best for shoot induction, shoot multiplication and visual performace of the culture. The average of number of shoot was 2.6; 5.0 and 7.7 shoots on the first three consecutive subcultures. Changing to different basal medium on the fourth subculture showed that the treatment of BA 0.7 mgl-1 is the best condition for shoot regeneration (12.60 shoots) and shoot length (6.97 cm). The culture from this treatment showed the best visual morphological performance.Keywords:Acacia hybrid; multiplication; subculture; in vitro; BA.Â ABSTRAKKultur in vitro merupakan suatu teknik yang menjanjikan untuk perbanyakan massal spesies-tanaman bernilai tinggi. Penelitian perbanyakan akasia hibrid (A. mangium x A. auriculiformis) melalui kulturin vitro telah dilakukan dengan menggunakan eksplan berupa batang satu buku yang berasal dari anakan. Media tumbuh yang digunakan adalah media dasar Murashige dan Skoog (MS) yang sudah dimodifikasi, media dasar Woody Plant Medium (WPM), dan Gamborg (B5). Penelitian dilakukan dalam dua tahap yaitu induksi tunas dan perbanyakan tunas. Perlakuan yang diuji adalah penggunaan Benzyl Adenine (BA) dengan konsentrasi 0,3; 0,7 dan 1,0 mg L-1. Pengamatan dilakukan terhadap waktu induksi tunas, jumlah tunas, tinggi tunas dan penampilan biakan secara visual. Hasil penelitian menunjukkan bahwa penggunaan BA 0,7 mg L-1 pada media MS modifikasi merupakan perlakuan terbaik untuk induksi tunas, perbanyakan tunas, tinggi tunas, dan kondisi biakan secara visual. Jumlah rata-rata tunas yang dihasilkan dari perlakuan ini adalah 2,6; 5,0 dan 7,7 tunas pada subkultur pertama, kedua dan ketiga. Pada penggunaan media dasar berbeda pada subkultur keempat menunjukkan bahwa perlakuan BA 0,7 mg L-1 merupakan perlakuan terbaik dengan jumlah tunas sebanyak 12,60 tunas dan rata-rata tinggi tunas 6,97 cm. Biakan yang dihasilkan dari perlakuan tersebut mempunyai penampilan yang baik dan normal.
UJI KEMAMPUAN DAYA SERAP HANJUANG (Cordyline fruticosa) SEBAGAI AGEN FITOREMEDIASI LOGAM Pb PADA MEDIA TANAH
Authors: Hernahadini Nelis , Muharram Luthfia Hastiani , Istiqomah Noviani Arifina
Published: November 2020

Absorption Capability Test of Hanjuang (Cordyline fruticosa) as Fitoremediation Agent of Lead in Soil MediumLead is a heavy metal waste that is dangerous for the environment and health. The use of ornamental plants is an alternative in reducing heavy metal pollution. Hanjuang (Cordyline fruticosa) is an ornamental-plant phytoremediation agent that can absorb heavy metals especially lead (Pb) at a high concentration. This study aims to test the Pb absorption ability of Hanjuang plant. Hanjuang was planted in a medium containing Pb at the concentration of 50 mg kgâ€“1 with variable planting time of 4, 6, 8, 10, and 12 weeks. The measurement of Hanjuang's absorption of Pb was carried out on the roots, stems, and leaves by the atomic absorption spectroscopy (AAS) method. The results showed that the highest absorption capacity of 63.4% occurred at 12 days planting time. Whereas the amount of Pb accumulation in each part of the plant, from the highest to the lowest concentration, was found in the roots, leaves, and stems, consecutively. The ability of the plant's absorption of Pb was reduced with increasing metal concentrations in the media.Keywords: Hanjuang, heavy metal, lead, phytoremediation, solid wasteABSTRAKTimbal menjadi salah satu limbah logam berat yang berbahaya untuk lingkungan dan kesehatan. Penggunaan tanaman hias menjadi alternatif dalam mengurangi pencemaran logam berat. Hanjuang (Cordyline fruticosa) merupakan tanaman hias agen fitoremediasi yang memiliki kemampuan menyerap logam berat khususnya timbal (Pb) yang cukup tinggi. Penelitian ini bertujuan melakukan uji daya serap tanaman hanjuang terhadap logam Pb. Hanjuang ditanam pada medium tanah berlogam Pb dengan kadar 50 mg kgâ€“1 dengan variabel waktu penanaman selama 4, 6, 8, 10 dan 12 minggu. Pengukuran daya serap Hanjuang terhadap Pb dilakukan pada bagian akar, batang, dan daun dengan metode spektroskopi serapan atom (AAS). Hasil menunjukkan bahwa daya serap tertinggi terjadi pada waktu tanam 12 hari dengan kadar 63,4%. Sedangkan jumlah akumulasi tiap bagian tanaman paling tinggi ke rendah terdapat pada bagian akar, daun, dan batang. Pada variasi konsentrasi, kemampuan daya serap tanaman terhadap Pb berkurang seiring meningkatnya konsentrasi logam pada media.
Effect of Elevated Temperature on Bending Fatigue Behavior for Neat and Reinforced Polyamide 6,6
Authors: Abdullah Orhan Sabah , Hassan Shaker S. , Al-khazraji Ahmed N.
Published: November 2020

Recently, considering polymer composite in manufacturing of mechanical parts can be caused a fatigue failure due to the very long time of exposure to cyclic loading and may at environmental temperatures higher than their glass transition temperature; therefore, in this paper, a comprehensive investigation for bending fatigue behavior at room and elevated temperatures equal to 60 °C, 70°C, and 80 °C will be done. Rotating bending test machine was manufactured for this purpose supplied with a connected furnace to perform fatigue tests at elevated temperatures. The obtained results appeared that the increase in applied stress and temperature caused a clear reduction in fatigue life; also the addition of carbon nanotubes enhanced the fatigue life at different temperatures by 183%, 205%, 218%, and 240%, respectively while the addition of short carbon fibers improved fatigue life by 324%, 351%, 387%, and 415%, respectively. As well as, Polyamide 6,6/carbon fiber composite appeared fatigue limit at temperatures equal to 20°C and 60°C and stresses approximately equal to 55 MPa and 38 MPa respectively.
Robotic Exoskeleton: A Compact, Portable, and Constructing Using 3D Printer Technique for Wrist-Forearm Rehabilitation
Authors: Shalal Noor S. , Aboud Wajdi S.
Published: November 2020

Regaining the activities of daily living after stroke and spinal cord injury requires repetitive and intensive tasks, meaning that rehabilitation therapy should be treated with a long duration. Thus, the need for rehabilitation devices based home is of most importance to increase the rehabilitation process and provide more comfortability for patients. This paper focuses on implementing and construction of a three degree of freedom (DOF) (flexion/extension, adduction/abduction, and pronation/supination), low cost, lightweight, and portable robotic exoskeleton for wrist-forearm rehabilitation. SolidWorks software program and 3D printer technology are used to model and construct the proposed robotic exoskeleton structure. In addition, the anthropometric parameters of the normal human lower arm are considered for this exoskeleton to provide a range of motion (ROM) and velocity for the links, joints, which matches with the anatomical structure of human and also to avoid the excesses motions over the normal range. The exoskeleton is constructed by a 3D printer utilizing polylactic acid (PLA) plastic material. The proposed implementing structure of the robotic exoskeleton shows comfortable, lightweight, simple and economic as well.
Analysis of the use of energy security assessment indicators in scientific publications
Authors: Chigarev B.N.
Published: November 2020

The article analyzes the general picture of the use of five indicators for assessing energy security: World Energy Trilemma Index, International Index of Energy Security Risk, SES. Sustainable Energy Security Index, Global Energy Architecture Performance, The IEA Model of Short-term Energy Security, proposed by international energy agencies in research studies on energy security. Their rare use in scientific publications and even in the texts of reports of a number of agencies is noted. As an example, the case of China shows that the use of indicators in conjunction with the regular International Energy Agency reports can only give a general picture of the country’s energy security, but does not allow a deeper analysis due to the lack of access to the source data. A brief bibliometric analysis of publications on energy security indicators is provided. It is shown that bibliometric indicators can be verstatile markers of expert attitude to the topic under study and identify promising areas of research on energy security issues.
Thermal performance of corrugated plate heat exchanger using ethylene glycol as test fluid
Authors: Battula Sreedhar Rao , Chittireddy Keerthana Reddy , Pullurwar Meena , Sriramoju Kishore Kumar
Published: November 2020

This paper reports an experimental comparative thermal analysis of a flat plate heat exchanger and corrugated plate heat exchanger (CPHE) of different corrugation angles using ethylene glycol as test fluid. The experiments were carried out counter current mode using water as hot fluid at 75°C.  Design of each plate provided with eleven thermocouple sensors to determine the temperatures, in which seven were used to measure the surface temperature of plate and four were used to measure the inlet and outlet bulk temperature of cold and hot fluids.  The mass flow rate of test fluid, varied between 0.5 to 4 liters per minute and corresponding steady state temperatures is measured. Using experimental readings, temperature difference between the inlet and outlet streams (DT), logarithmic mean temperature difference (LMTD) and overall heat transfer coefficient (U) are determined. The obtained DT and U values of corrugation angles (300, 500) of CPHE were compared with those of flat plate heat exchangers. For corrugation angle of 30° and 50°, the DT and U values increases with increase of mass flow rate of the fluid.
Modern third generation solar photovoltaic technology: Dye sensitized solar cell
Authors: Banne Chiranjeev
Published: November 2020

Depleting conventional energy resources are forcing the world to search for new and renewable energy resources. Solar energy is one of the potent and abundant energy resource .To use the solar energy to its fullest along with conventional technology has specific limitations. These limitations can be eliminated by use of Dye Sensitized Solar Cell (DSSC). DSSC can be seen as promising future technology. It is advantageous over Silicon (Si) based Photovoltaic (PV) cell in terms cost, easy manufacturing, stability at higher temperature, aesthetics, etc. Also it works in indoor conditions i.e. diffused sunlight which nearly not feasible with conventional PV cells. Now Research and Development Departments of many countries like Japan, Germany, USA, Switzerland, India, China and many firms like G-Cell, Oxford PV, Sony, TATA-Dyesol are working on DSSC to improve its various aspects so as to make it more applicable in various conditions. The paper will discuss the concept, construction, working of DSSC. Also it will illustrate current applications of DSSC.
Yumuşak kontakt lens kullanıcılarında korneal değişikliklerin incelenmesi
Authors: BULUT Mübeccel , BİLEN Abdurrahman , KARADAĞ Ayşe Sevgi
Published: November 2020

Amaç: Kontakt lens kullanan hastalardaki korneal değişimlerin incelenmesi.Gereç ve Yöntem: Kontakt lens kullanmak için başvuran 18 olgunun, topografi cihazı ile ölçülen merkezi korneal kalınlık (MKK) ve keratometri değerleri (K1, K2), speküler mikroskop cihazı kullanılarak elde edilen kornea endotel değerleri ve schirmer testi sonuçları kaydedildi.Bulgular: Çalışmaya 18 hastanın 36 gözü dâhil edildi. Olguların yaş ortalaması 22,77±4,00, 15’i kadın, 3’ü erkekti. K1, K2, MKK ve endotel sayısı değerlerinde lens kullanımı sonrası anlamlı bir azalma olduğu görüldü. (p<0,05) Posterior K1 değerinde lens kullanımından sonra anlamlı bir artış olduğu görüldü.Sonuç: Silikon hidrojel lensler yüksek oksijen geçirgenliğine rağmen korneanın fizyolojisi ve mimarisini hala etkileyebilmektedir.
The evaluation of age and gender related changes of the choanae height and width sizes with computed tomography
Authors: OKSÜZLER Mahmut , ÖZANDAÇ POLAT Sema , KABAKCI Ayşe Gül
Published: November 2020

Aim: It is the evaluation of height and width morphometry of choanae according to age and gender in healthy Turkish population between 18-80 years old.Materials and Methods: 281 subjects (140 males and 141 females) having brain Computed Tomography in the Radiology Department, participated in this study. ANOVA Test, Paired Samples T test and Pearson Correlation analysis were used to determine the relation and significance between measurements.Results: The overall means and standard deviations of the choanae height (right/left) and choanae width (right/left) were found as 24.29±3.35mm/24.20±3.23mm, 13.17±1.43mm/12.76±1.43mm in females, respectively whereas, the same measurements were 22.97±3.12mm/23.01±3.28mm; 13.14±1.67mm/12.60±1.38mm in males, respectively. When analyzed the values, there were an increase from 18 years to 80 years (from decade 2 to decade 8) in choanae heights of two sides (right/left).Conclusion: The knowledge of the choanae ideal and reference values may play a key role in success of the surgical procedure.
Aspartam ve asesülfam K kullanımının testis yapısına etkilerinin ince yapı düzeyinde incelenmesi
Authors: SENCAR Leman , KUYUCU Yurdun
Published: November 2020

Amaç: Bu çalışma, ülkemizde ve dünyada yaygın olarak kullanılan aspartam ve asesülfam K’nın, sıçanlarda testis dokuları üzerindeki etkilerinin ışık ve elektron mikroskobik düzeyde araştırılması amacıyla yapılmıştır.Gereç ve Yöntem: Çalışmada 60 adet erkek sıçan kullanıldı ve bu denekler rastgele olarak 6 eşit gruba ayrıldı. 1. gruptaki hayvanlar kontrol grubu olarak değerlendirildi; 2.gruptaki hayvanlara 200 mg/kg/gün aspartam; 3.gruptaki hayvanlara 300 mg/kg/gün aspartam; 4. gruptaki hayvanlara 300 mg/kg/gün asesülfam K; 5. gruptaki hayvanlara 600 mg/kg/gün asesülfam K ve son gruba da 300 mg/kg/gün aspartam+300 mg/kg/gün asesülfam K birlikte 8 hafta süreyle verildi. 8. haftanın sonunda deneklerden testis dokuları alındı ve dokular ışık ve elektron mikroskobik olarak değerlendirildi.Bulgular: Aspartam ve asesülfam K kullanımının testis dokusunda dejenerasyona yol açtığı ve spermatogenez sürecinde sağlıklı spermatid oluşumunu engellediği izlendi.Sonuç: Aspartam ve asesülfam K tüketiminin erkek sıçanlarda testis dejenerasyonuna neden olduğu görüldü. Bununla birlikte, erkek üreme sistemindeki aspartam ve asesülfam K toksisitesinin doğrulanması için daha kapsamlı çalışmaların yapılması gerektiği kanaatine varıldı.
Can public toilets in hospitals contribute to the spread of carbapenem resistant gram-negative microorganisms? Assessment with social handwashing observations
Authors: ALTUNIŞIK TOPLU Sibel , DUMAN Yücel , ERSOY Yasemin , PARMAKSİZ Emine
Published: November 2020

Aim: The goal of our study is to investigate the role that public toilets in hospitals have in spreading and transmitting significant carbapenem resistant Gram negative microorganisms, and potentially compare them to the isolates present in our intensive care units.Materials and Methods: In our study, student groups took samples from the toilets that were actively used, mostly by patient companions, in our hospital. In addition, social hand washing compliance and reliability was observed from the specified toilets.Results: In 85 samples taken from fourteen toilets, Gram negative bacteria accounted for 26% of 115 bacterial growths. However, carbapenem-resistance, which is thought to have epidemiological significance, was not present in Gram negative isolates.Conclusion: It was concluded that no major problem was associated with the transmission of Carbapenem-resistant Gram negative microorganisms from these areas through the hands and peripheral surfaces of patients and their companions.
Patrimonio negroafricano; una propuesta didáctica sobre máscaras para Educación Visual y Plástica
Authors: Revilla Carrasco Alfonso , Olivares Gázquez Pilar
Published: November 2020

Este artículo se centra en la inclusión del patrimonio artístico negroafricano de máscaras tradicionales dentro del currículum de la asignatura de Educación Plástica y Visual. El proyecto desarrolla actividades didácticas enfocadas a visualizar las máscaras negrafricanas y de ese modo paliar las connotaciones etnocéntricas que suponen el desconocimiento de las culturas negroafricanas[i]. Esta propuesta didáctica se desarrollará dentro del contexto educativo del instituto Goya de Zaragoza en el nivel de 1º de Bachillerato artístico. La asignatura de Volumen es la materia donde se ha puesto en práctica esta propuesta didáctica y la ratio es de 8 alumnos/as con edades de entre 16 y 17 años. En este grupo un alumno es absentista y el resto acude a clase con regularidad. El proceso metodológico está marcado por un aprendizaje activo y cooperativo, donde los individuos desarrollaron sus dotes artísticas y creativas. [i] Este trabajo se ha realizado con la colaboración de la Fundación Seminario de Investigación para la Paz de Zaragoza en el marco de su Convenio con las Cortes de Aragón 2019.
La evaluación competencial en el Proyecto Artístico. Un estudio de caso en secundaria
Authors: Ramos Vallecillo Nora
Published: November 2020

Este trabajo presenta los resultados de una investigación centrada en el análisis de la importancia del proceso evaluativo para el desarrollo competencial dentro del ámbito artístico. El estudio tomó como eje de indagación un proyecto llevado a cabo con alumnado de segundo curso de educación secundaria. Se utilizó el estudio de caso como metodología de la investigación y el análisis de documentos, observación participante y entrevista como estrategia de recogida de información. Los resultados alcanzados permiten constatar la importancia del proceso de evaluación, el desarrollo competencial y la sistematización de los procesos artísticos por medio del aprendizaje basado en proyectos.
Empirical Differences between UAE and Finland of Strategic Foresight Implementation
Authors:   Faculty of Technology Management and Business,Universiti Tun Hussein Onn Malaysia, 86400,Parit Raja, Batu Pahat, Darul Ta’zim, Johor, MALAYSIA, Ahmed Lari Fatma , Darwish Abdulla Lari Darwish Ahmed ,   Department of Municipalities and Transport (DMT), Al maamora, Abu Dhabi, UNITED ARAB EMIRATES, Abdulla Lari ohamed Ahmed Darwish ,   Abu Dhabi Transmission & Despatch Company, Abu Dhabi , UNITED ARAB EMIRATES
Published: November 2020

Strategic foresight is a structured and systematic way of using ideas to anticipate and better prepare for change in the future. Therefore, the main aim of the study is to ascertain whether there is difference between UAE and Finland strategic foresightsimplementation. This study employed quantitative methodology where questionnaire was used as a means for data collection. The data was analysed using SPSS software to ascertain the difference between the means across the strategic foresight dimensions between the two countries. The result findings revealed that that there is statistically significant difference between UAE and Finland’s in the areas of Information use and method sophistication of the two countries’ strategic foresights. Specifically, UAE and Finland differs on information use in their strategic foresights. Similarly, the two countries differ on method sophistication in their strategic foresight. However, there is no significant difference between UAE and Finland on people and network, organisation and culture in their strategic foresights. This specify that the respondents from Finland and UAE had agreed almost similar factors in strategic foresight for the public policy making. Hence iftaking Finland as a benchmark, the results indicate that UAE is also having the same interest in strategic foresight implementation
Development of Structural Mediation Model of Innovative Strategy, Employees’ Job Performance and Technology for UAE Government Sector
Authors:   Faculty of Business and Technology Management,UniversitiTun Hussein Onn Malaysia (UTHM), Batu Pahat, Johor, 86400 Parit Raja, MALAYSIA, Abdulla Lari Mohamed Ahmed Darwish , Abdul Hamid Norhadilah ,   Abu-Dhabi Police  (GHQ ), Al morour , Abu Dhabi, United Arab Emirates, Abdulla Lari Darwish Ahmed Darwish ,   Faculty of Business and Technology Management,UniversitiTun Hussein Onn Malaysia (UTHM), Batu Pahat, Johor, 86400 Parit Raja, MALAYSIA,   Abu Dhabi Transmission & Despatch Company, Abu Dhabi , United Arab Emirates
Published: November 2020

This study established a relationship of innovations and employees’ job performance in the government sector and also the mediating effect of technology towards the relationship. It adopted quantitative approach where data was collected through questionnaires survey and analyzed statistically. The questionnaire survey utilized simple random sampling methods among UAE government employees. A total of 300 questionnaires were distributed randomly and 265 were returned indicates 88.3% response rate. The collected data was then used to develop and assess SEM-AMOS mediation model. The results found that all the direct relationships reported a positive effect. It also found that the innovation dimension constructs and technology mediating construct havingexplained 84% variation in employees’ job performance constructs. For indirect/mediation effect, it was found that technology does not show any mediation effect on the relationship between innovation and job performance constructs. This implies that technology does not mediate the relationship between innovation strategies and the employees’ job performance. It also implies that for an effective employees’ job performance core attention to building and managing an innovation approach is required in the UAE government sector. Thus, innovation strategies give more influence to employees’ job performance in the government sector through the distinctive capabilities of UAE ministry employees.
Ranking of the Factors Causing Cost Overrun in Infrastructural Projects of UAE
Authors:   Faculty of Business and Technology Management,Universiti Tun Hussein Onn Malaysia (UTHM), Batu Pahat, Johor, 86400 Parit Raja, MALAYSIA, Ahmed Marey Alhammadi Ahmed Salem , Memon Aftab Hameed ,   Department of Civil Engineering,Quaid-e-Awam University of Engineering, Science and Technology, Nawabshah, PAKISTAN
Published: November 2020

Achieving completion of the projects within stipulated cost is the fundamental requirement of any client involved in construction projects. Especially when the projects are fundedby government with the revenue generated from public where it supposed to produce more development with less investment. Unfortunately, many of the construction projects fail in meeting this basic criteria globally including UAE. Hence, this study drew attention to the factors responsible for cost overrun in construction of infrastructure projects in UAE. Data was collected through structured questionnaire survey from practitioners representing the client, consultant and contractors firms involved in infrastructure projects of UAE. Investigation involved 27 common factors categorized in three groups as design & planning related factors, management related factors and resource related factors. With the statistical analysis of 59 completed survey forms, it was revealed that lack of coordination at design phase, uncompleted design on the tender's time andfrequent design changesare top 3 factors in design and planning group while in management group top 3 factors causing cost overrun are poor supervision andtimely instruction from contractor, contractual claims (ex. extension of time with cost claims)andpoor site management. Contractor's financial constraints, poor labour productivity andresource deficiency andshortage of technical personnel(skilled labour) are reported as major resource related factor causing cost overrun in infrastructural projects of UAE. The practitioner should work out for controlling these factors to complete the projects within the stipulated cost and avoid cost overrun.
Risk Factorsfor Construction Workforce Safety towardsSustainability
Authors:   Sukkur IBA University, Airport Road, Sukkur, Sindh, PAKISTAN, Asad Muhammad Mujtaba , Sherwani F. ,   National University of Computer and Emerging Sciences, Karachi, PAKISTAN, Khand Zahid Hussain ,   Sukkur IBA University, Airport Road, Sukkur, Sindh, PAKISTAN
Published: November 2020

This research article is based on the identification of safety risk factors associated with construction projects in Pakistan related with the China-Pakistan economic corridor (CPEC). In this paper, four construction sites have been targeted from Sindh, Punjab, Khyber Pakhtunkhwa, and Baluchistan province of Pakistan. The research was based on quantitative mode where the questionnaire survey was adopted for data collection and analysed statistically. The targeted respondents were 400 CPEC construction workforces from four different targeted sites in Pakistan. The collected data was analysed using descriptive statistical methods of Statistical Package of Social Sciences (SPSS) 23.0 software. According to the findings, it has been specified that the respondents fromall four targeted construction sites in Pakistan has considered three major safety risk factors such as administrative, personal protective equipment (PPE) and workforce safety. Risk factors for administrative is between 1.06 and 2.65 (low level to moderate level), for PPE is between 1.06 and 2.65 (low level to moderate level) and for workforce safety is between 2.4 and 3.60 (moderate level to high Level). Meanwhile, the safety experts have been indicated the lack of proper training & PPE equipment’s, falling from height and falling object hazardsare as the major cause of injuries at Pakistani construction sites related with CPEC projects.The findings of this study will be the catalyst for the CPEC projects in Pakistan to minimize the safety and health concern among construction industry workforce.
An investigation of book reading habits levels and correct decision-making styles in terms of some variables: A research on coach and referees
Authors:   Department of Coaching Education, Faculty of Sport Sciences, Usak University, Usak, Turkey, Musa Mihriay
Published: November 2020

In this study, it was aimed to examine the reading habits levels and making the correct decision styles of basketball, handball, volleyball, and football coaches and referees in terms of some variables, the research was carried out with the general survey model, one of the quantitative research designs, the active coaches and referees of basketball, football, volleyball, and handball in İzmir, Denizli and Uşak provinces constituted the universe of the study, the sample of the study, on the other hand, consisted of 98 participants, 52 of whom were coaches and 46 were referees, determined by the simple random sampling method, one sample t-test at a 0.05 significance level was conducted to determine whether the sample represented the universe equally and homogeneously. Melbourne decision making scale I-II, and book reading habits scale were used to collect data in the study. Since the data are suitable for normal distribution, the t-test in comparing the pairwise means; parametric tests such as one-way ANOVA tests were used at 0.05 significance level in comparing the mean scores of more than two groups. In terms of education levels, it has been observed that female coaches and referees studying at faculties of sports sciences have higher levels of reading habit, love of reading, and being influenced by books. In addition, it was determined that individuals who trust and respect the decisions of their families have higher reading habits and correct decision-making styles and do not panic during the decision-making process.
Valoraciones subjetivas y condiciones objetivas de confort térmico en viviendas
Authors: Arrieta Gabriela M.
Published: November 2020

El siguiente artículo, describe el estudio realizado en un conjunto de viviendas de la ciudad de Córdoba, con el objetivo de comprender como las personas perciben el ambiente térmico de sus viviendas. Partiendo de una investigación doctoral en curso, basada fundamentalmente en el confort higrotérmico de espacios interiores residenciales bajo la concepción adaptativa, y valorando la idea de que el paradigma de confort ha ido evolucionando en los últimos años, el interés de este artículo es describir las sensaciones subjetivas referidas al confort higrotérmico de las personas que habitan en Córdoba. El estudio metodológico se desarrolló a través del método comparativo constante, recurriendo a entrevistas guiadas y a la sensibilidad teórica del investigador. Las conclusiones abordadas tienen que ver con el impacto negativo que produce la incomodidad térmica en la vida de las personas y la dependencia inconsciente a la tecnología para alcanzar confort, en lugar de estrategias pasivas.
Hacer arquitectura, enseñar tecnología
Authors: Villani Daniel Pedro , Dalvit Vanina , Mondejar Pablo , Rojo José
Published: November 2020

“Consideramos la arquitectura como un hecho construido”, por lo tanto, estamos convencidos que “el sustento tecnológico nos permite superar el límite de la idea”. El equipo de cátedra, una forma de plantear interrogantes, ideas, debates, que busquen aproximaciones sobre el aprendizaje-enseñanza de los conocimientos tecnológicos del proyecto arquitectónico atravesado por la sustentabilidad. La metodología empleada en el proceso se basa en una dinámica de transferencia de contenidos teóricos en ejercicios prácticos planificados.  El 1° trabajo práctico “El ejemplo” es analítico, sobre obras arquitectónicas. Se procura que el estudiante infiera cuales fueron los motores que permitieron el desarrollo de cada uno de los proyectos asignados para el análisis, realizando una re-interpretación intuitiva de la metodología proyectual supuesta, desde el punto de vista tecnológico. El 2° trabajo “El módulo” es una ejercitación sobre diseño tecnológico de un módulo de 6 mts x 6 mts x 6mts que abarca desde el estudio de los requerimientos climáticos, estructura, envolventes, terminaciones hasta cómputo métrico, que son todos los contenidos de la materia. Se transmite y promueve el uso pertinente y coherente de los recursos materiales de la arquitectura por lo que trabajamos en acrecentar en los estudiantes el hábito de “pensar una arquitectura bien resuelta y vinculado con su medio”. “Incorporar la tecnología en el proceso de diseño”, incorporar al proceso de diseño, como insumo del pensamiento del proyecto, para permitir que el proyecto se cristalice en arquitectura.