bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGEMBANGAN BAHAN AJAR BERBASIS NILAI KARAKTER DI SD KOTA TERNATE PROVINSI MALUKU UTARA
Authors: Darmawati Darmawati , Sundari Sundari
Published: December 2017

Abstract: Abstract: A research development of teaching materials in the form of character-based worksheets. This research is aimed at developing producing output an elementary teaching materials based on the character value addition through this research are expected to: 1) provide accurate information to organizations / institutions / groups ber- competent to teach students to use materials ajarberbasisnilai right character in Basic pendidikanSekolah levels; 2) the development of strategies and policies that will be recommended from this research can be a direction for developm-ment-based learning models karakterdi value formal education, 3) prod- ucts of this study can be a reference for the Department of Education in policy decisions ber- connection with efforts to improve the quality of education in North Maluku in obtaining appropriate teaching materials in elementary school education. The results of this study indicate that that the teaching materials developed are worksheets grade 5 semesters 1 with the theme of Ben-da-objects in the surrounding environment. Integrating the value of the character in the worksheets to follow the curriculum in 2013 with thematic integrative approach. LKS validation results developed are still in pretty decent categories used so that still needs to be revised and improved in the development of the next stage. Abstrak: Telah dilakukan  penelitian pengembangan bahan ajar  berbentuk LKS berbasis karakter. Penelitian ini merupakan penelitian pengembangan yang bertujuan menghasilkan out put suatu bahan ajar SD berbasis nilai karakter Selain itu melalui penelitian ini diharapkan dapat: 1) memberikan informasi yang akurat kepada organisasi/lembaga/kelompok yang ber-  kompeten untuk mengajarkan kepada anak didik dengan memakai bahan ajarberbasisnilai karakter yang tepat di jenjang pendidikanSekolah Dasar; 2) strategi pengembangan dan kebi- jakan yang akan direkomendasikan dari penelitian ini dapat menjadi arahan bagi pengem-bangan model-model pembelajaran  berbasis nilai karakterdi jenjang pendidikan formal, 3) ha- sil penelitian ini dapat menjadi acuan bagi Dinas pendidikan dalam penentuan kebijakan ber- kaitan dengan upaya peningkatan mutu pendidikan di Maluku Utara dalam memperoleh bahan ajar yang tepat pada jenjang pendidikan Sekolah Dasar. Hasil penelitian ini menunjukkan bahwa bahwa bahan ajar yang dikembangkan adalah LKS kelas 5 semester 1 dengan tema ben- da-benda di lingkungan sekitar. Pengintegrasian nilai karakter dalam LKS mengikuti kuriku- lum 2013 dengan pendekatan tematik Integratif. Hasil validasi LKS yang dikembangkan  masih dalam kategori cukup layak digunakan sehingga masih perlu dilakukan revisi dan perbaikan dalam pengembangan tahap berikutnya. Kata Kunci: bahan ajar, lembar kerja siswa, nilai karakter, sekolah dasar kota ternate
PERBEDAAN KEMAMPUAN KOGNITIF SISWA MENGGUNAKAN MODEL PEMBELAJARAN KANCING GEMERINCING DAN JIGSAW PADA PEMBELAJARAN TEMATIK TEMA 9 KELAS V SD
Authors: Sholehah Lutfi Alimatus
Published: December 2017

Abstract:Cooperative learning ringing button and jigsaw model is two learning model which has similarity and different characteristic. The research type is quasi experiment research. Research variables consist of Independent variable which is ringing button learning model and jigsaw and dependent variable, which is student cognitive skill. Research sample consist of two grade V which are class VA Muhammadiyah 4 Batu Elementary school. The research is measured using Independent Sample T -test with the help of SPSS 17 for windows. Research shows that post-test found count t value for -0,970 with significance for 0,336 table tvalue in free degree of 56 and real rate 0,05 for 2,003. When there’s comparison, so that count t< table t or significance > 0,05 and concluded that Ho is accepted which means there’s no significant difference is students’ cognitive skill using ringing button and jigsaw learning model.Keyword:Cognitive abilities, learning models, Jinks, Jigsaw, thematic learning.Abstrak:.Pembelajaran kooperatif model Kancing Gemerincing dan J igsaw merupakan dua modelajaran yang memiliki memiliki perbedan karakteristik. Penelitian ini eksperimen semu. Variabel penelitian terdiri dari variabel bebas yaitu model pembelajaran Kancing Gemerincing dan Jigsaw dan variabel terikat yaitu kemampuan kognitif siswa. Sampel penelitian ini terdiri dari 2 kelas V SD Muhammadiyah 4 Batu tahun ajaran 2014/2015 yaitu kelas VA yang berjumlah 30 siswa dan kelas VB yang berjumlah 30 siswa.Analisis data dilakukan dengan uji normalitas, uji homogenitas, dan uji hipotesis menggunakan Independent Sample T-Test dengan bantuan SPSS 17 for windows.Hasil penelitian menunjukan bahwa post-test diperoleh nilai thitung sebesar -0,970 dengan nilai signifikansi sebesar 0,336. Nilai ttabel pada derajat bebas 56 dan taraf nyata 0,05 sebesar 2,003. Apabila dilakukan pembandingan maka |thitung| < t tabel atau nilai signifikansi > 0,05 disimpulkan Ho diterima yang berarti bahwa tidak terdapat perbedaan yang signifikan kemampuan ko gnitif siswa yang menggunakan model pembelajaran Kancing Gemerincing dan Jigsaw.Kata Kunci:Kemampuan kognitif, model pembelajaran, Kancing Gemerincing, Jigsaw, pembelajaran tematik
Pszichometria Magyarországon a 20. század első felében
Authors: Zsuzsanna Vajda
Published: December 2017

Kulcsszavak: az értelmi képességek mérése, gyerekek és az iskola, a képességmérés bevezetése MagyarországonA modern pszichológia megszületésében - ezt a pszichológushallgatók már a bevezető kurzusokon megtanulják – alapvető szerepet játszott, hogy a 19. század derekára létrejöttek a mentális funkciók mérésének elvi és gyakorlati lehetőségei. Az egyszerűbb megismerő funkciók (érzékelés, emlékezés) mellett az értelmi képességek jelentették az első komplex emberi sajátosságot, amelynek mérésével a kutatók kísérleteztek. A koponya- és agytérfogat- vizsgálatoktól nem túlságosan hosszú út vezetett az értelem teljesítmény alapú méréséig, amelynek legsikeresebb változata a mai módszerekre is hatást gyakorló Alfred Binet nevéhez fűződik. Binet módszere gyorsan elterjedt a világ fejlettebbik felében, alig néhány éven belül Magyarországra is eljutott. Vajon tartogat-e érdekességeket a több, mint egy évszázaddal ezelőtt zajlott hazai adaptáció bemutatása a mai olvasónak?Key words: measurement of mental capacities, children and schooling, introduction of mental testing in Hungary.By the end of  the 19th century many attempts had been made for the sake of measurement of mental capacities. It was nevertheless a theoretical and a practical need: having „objective” data about human skills  was a condition of becoming psychology as „science”. Hence educators wanted to learn more about cognitive development of children  and to understand why certain children could not keep up with their peers in the classrooms of schools. In the early 19ties Binet and Simon’s  test gained ground in Europe and United States and it has been soon introduced into Hungary  too. This paper gives a surway of the history of its introduction, its social and historical background and the people who took part in it.
Impact of Prolonged Periods Classroom Settings in Intra-abdominal fat area and its Consequence on Posture/Balance Control among Algerian Childhood College Preparatory School.
Authors: Mohammed Zerf
Published: December 2017

The play has been shown to help children adjust to the school setting and to enhance children's learning [1]. Since this theory, the current study was designed to examine the significance of mechanical effects of intra-abdominal on posture/balance control among the Algerian Childhood Primary Schools. Since our teachers emphasise the good classroom settings as a discipline pedagogical aspect of success learning. While High-quality educational programs for children in preschool and kindergarten have play at the centre of the curriculum [2]. Our interventions in this study aimed to examine Impact of Prolonged Periods Classroom Settings in Intra-abdominal fat area and its Consequence on Posture/Balance Control among Algerian Childhood Preparatory Schools. for the purpose, a total of 61 schoolboys of Slimane provinces Naama, Municipality Mecheria, Algeria male gender their average age 5±1.52 years distributed into two homogeneous groups, according to them, school attendance (kindergarten School (29 boys) - preschool (32 boys)). Tested by saving tests (Body Fat Percentage-Abdominal circumference - Modified Bass Test of Dynamic Balance and standing balance).

Based on the analysis statistics, we confirm:

Prolonged periods classroom settings increase Intra-Abdominal Fat which represents big risk posture/balance control.

Primary schools posture needs an interactive play method Learning classroom to improve body imbalance as health benefits physical activities.

Based on the differences acquired by the research team, we emphasise that prolonged periods classroom settings Primary Schools increase the intra-abdominal which owing to the weakness of skeletal muscle fatigue and abnormal pathological alignment. While as a recommendation pedagogy practised, we suggested to our teachers, who work with these children to know that the balanced posture requires more energy in the class, Considering that our student seat more than 6 hours a day, 30 per week, and 120 per month 1080 per year in Algerian primary schools.
Novel lncRNA Erbb4-IR Promotes Diabetic Kidney Injury in db/db Mice by Targeting miR-29b
Authors: Sun Si F. , Tang Patrick M.K. , Feng Min , Xiao Jun , Huang Xiao R. , Li Ping , Ma Ronald C.W. , Lan Hui Y.
Published: December 2017

Transforming growth factor-β/Smad signaling plays an important role in diabetic nephropathy. The current study identified a novel Smad3-dependent long noncoding RNA (lncRNA) Erbb4-IR in the development of type 2 diabetic nephropathy (T2DN) in db/db mice. We found that Erbb4-IR was highly expressed in T2DN of db/db mice and specifically induced by advanced glycosylation end products (AGEs) via a Smad3-dependent mechanism. The functional role of Erbb4-IR in T2DN was revealed by kidney-specific silencing of Erbb4-IR to protect against the development of T2DN, such as elevated microalbuminuria, serum creatinine, and progressive renal fibrosis in db/db mice, and to block AGE-induced collagen I and IV expression in mouse mesangial cells (mMCs) and mouse tubular epithelial cells (mTECs). Mechanistically, we identified that the Erbb4-IR–microRNA (miR)-29b axis was a key mechanism of T2DN because Erbb4-IR was able to bind the 3′ untranslated region of miR-29b genomic sequence to suppress miR-29b expression at transcriptional level. In contrast, silencing of renal Erbb4-IR increased miR-29b and therefore protected the kidney from progressive renal injury in db/db mice and prevented mTECs and mMCs from AGE-induced loss of miR-29b and fibrotic response in vitro. Collectively, we identify that Erbb4-IR is a Smad3-dependent lncRNA that promotes renal fibrosis in T2DN by suppressing miR-29b. Targeting Erbb4-IR may represent a novel therapy for T2DN.
A Gyűrűfűi Riolit Formáció kőzettani vizsgálatának eredményei a Villányi-hegység északi előterében
Authors: Szemerédi Máté , Varga Andrea , Lukács Réka , Pál-Molnár Elemér
Published: December 2017

Munkánkban a Gyűrűfűi Riolit Formáció Villányi-hegység északi előterében mélyfúrások által feltárt kőzeteit vizsgáltuk. A Bisse–1, a Peterd–1, a Szava–1, a Vókány–2, az Egerág–7 és a Szalánta–3 fúrásokból változó, de alapvetően korlátozott mennyiségű fúrómag és vékonycsiszolat állt rendelkezésre a kőzettani reambulációhoz. Petrográfiai megfigyeléseink, valamint az archív jelentések adatai alapján két fő litológiai csoportot különítettünk el a területen: lávakőzeteket és piroklasztitokat. Ásványos összetétel és szövet alapján a következő kifejlődések különböztethetők meg a Gyűrűfűi Riolitban: (1) riolitos összetételű lapillitufa (Peterd–1, Vókány–2 felső szakasza, Egerág–7 felső szakasza, Szalánta–3 felső szakasza és feltételezhetően a Bisse–1 felső szakasza); (2) riolitos összetételű lávakőzet (Bisse–1 alsó szakasza, Szava–1, Vókány–2 alsó szakasza); (3) dácitos összetételű lávakőzet (Egerág–7 alsó szakasza); (4) riodácitos–dácitos összetételű lávakőzet (Szalánta–3 alsó szakasza).
A Villányi-hegység északi előterében feltételezhető egy korábbi, lávaöntéssel járó magmás tevékenység (többek között Bisse–Vókány és Szava térségében egy riolitos összetételű lávadómot/lávaárat, míg Egerág–Szalánta térségében riodácitos–dácitos összetételű lávakőzeteket létrehozva), időben ezt követte egy robbanásos kitörésekkel kísért vulkanizmus, amely jelentős vastagságú ignimbrittakaróval fedte be a területet.
A mélyfúrásokban feltárt, jelenleg riolitos összetételű piroklasztitok kristálygazdagsága szakirodalmi adatok alapján dácitos kiindulási olvadékösszetételre jellemző, ami hasonlít az úgynevezett monoton intermedier képződményekre. Az ilyen vulkáni kőzetek egy középső-felső kéregbeli magmatározó kristálykása reaktivációjaként értelmezhetők. Figyelembe véve, hogy a piroklasztitokat utólagos kálimetaszomatikus hatások érték (pl. Peterd–1 fúrás földpátjainak adulárosodása), nem zárható ki azok kémiai összetételének módosulása. A Villányi-hegység északi előterében a permi vulkanizmus jellegének pontosításához ezért további részletes kutatás szükséges, amit az Egerág–7 és a Szalánta–3 fúrások piroklasztitjaiban megjelenő magmás eredetű gránátkristályok vizsgálata is elősegíthet.  
Eredményeink azt mutatják, hogy a Villányi-hegység északi előterében — az európai Variszcidák analóg területeihez (pl. Intra-Szudéta-medence, Dél-permi-medence, Erdélyi-szigethegység) hasonlóan — egy kemizmusát tekintve is összetett, akár hosszabb ideig fennálló vulkáni rendszer működhetett, amelynek kőzeteit korábban egyszerűsítve, egyetlen rétegtani marker képződményként kezelték. A rendszer alaposabb megismeréséhez a fúrásonkénti radiometrikus (U-Pb, cirkon) kormérések, továbbá a teljes kőzet (fő- és nyomelem) geokémiai vizsgálatok hozhatnak előrelépést.
A Brissus genus (Echinoidea) első előfordulása a magyarországi badeniből és a Brissus mihalyi n. sp. leírása
Authors: Polonkai Bálint , Kroh Andreas , Görög Ágnes , Selmeczi Ildikó , Dunai Mihály , Bodor Emese Réka
Published: December 2017

A budapesti Örs vezér téri üzletközpontok alapozása során nagy számban fordultak elő tengeri sünök is a badeni korú Lajtai Mészkő Formáció rétegeiben. Az Árkád 1 alapgödréből előkerült egy Magyarországról eddig nem ismert tengeri sün nemzetség, a Brissus.  
A genust eddig a Paratethys térségéből csak burgenlandi és nyugat-ukrajnai lelőhelyekről írták le. A Budapesten megtalált mindkét Brissus egyed jó megtartású. Az egyik példányt a Brissus abeli (Reidl, 1941) fajba lehetett besorolni, ami csak a Paratethys késő-badeni korú üledékeiből ismert. Ezen felül előkerült egy az egész európai-mediterrán térségben eddig ismeretlen Brissus forma, amely morfológiai bélyegeit tekintve egyik európai vagy egyéb mediterrán formával sem egyezik meg. Emellett hordoz sajátságos morfológiai elemeket is, úgy, mint az erősen anterior helyzetű apicalis lemez, az anterior szirompár által bezárt szög mértéke, valamint a periproct elhelyezkedése. Mindezek alapján a forma új fajként való elkülönítése indokolt, melynek neve – Mihály Sándor tiszteletére – Brissus mihalyi nov. sp.
Maga a Brissus genus ma széles földrajzi elterjedésű, de kis egyedszámú; a ma élő együtteseket részletesen nem vizsgálták. Az európai neogénben ritka, így a magyarországi megjelenés a forma eocéntől máig zajló evolúciójának megismeréséhez is fontos információt nyújt.
Furadékminták gáz és illékony komponenseinek vizsgálatához szükséges minta-előkészítési és -feltárási protokoll fejlesztésének eredményei
Authors: Körmös Sándor , Czirbus Nóra , Schubert Félix
Published: December 2017

A mélyfúrásokból származó fúrómagok, furadékminták anyagában csapdázódott fluidumzárványok gáz és illékony komponens tartalmának vizsgálatával lehetőség nyílik a kőzettestben egykor működött fluidumrendszerek kémiai összetételének megismerésére, azok vertikális kiterjedésének meghatározására, a paleo-fázishatárok lehatárolására. A kiválasztott fúrásszelvény mentén, a kőzetmintákból kiszabadított gázok relatív mennyiségét a mélység függvényében ábrázolva, gázprofilok, illetve ezekből további származtatott paraméterek számíthatók. A Szegedi Tudományegyetem, Ásványtani, Geokémiai és Kőzettani Tanszékén megépített gázanalizátorral a fluidumzárványok mechanikai feltárása („feltörése”) alacsony nyomású-magas hőmérsékletű körülmények között történik. Az így felszabadított gázok azonosítását a törőkamrákhoz csatlakoztatott kvadrupól tömegspektrométerrel végezzük.

A furadékminták vizsgálatának elengedhetetlen feltétele a minták megfelelő előtisztítása, majd a fluidumzárványok hatékony és reprodukálható feltárása, azaz a minta törése. Az optimális mérési protokoll kialakítása céljából, az adatok reprodukálhatósága és megbízhatósága érdekében a műszer törőegységeivel 250–500 μm mérettartományba eső kvarchomok minták töréstesztjeit, és eltérő típusú fúróiszapokkal szennyezett kvarchomok minták tisztítási eljárásait vizsgáltuk meg. A töréstesztek eredményei alapján a nagyobb mintamennyiség, a magasabb ütésszám vagy a megnövelt préselési idő eltérő mértékben módosítja az aprózódás hatékonyságát. Vizsgálataink alapján az optimális aprózódás, azaz a legnagyobb számú fluidumzárvány felnyitásához maximálisan 0,5–1,0 g mintamennyiség, minimum 50 db ütésszám és 1 sec ütésenkénti préselési idő szükséges.

A tisztítási eljárások hatékonyságának összehasonlítása során beigazolódott, hogy a megvizsgált tisztítási módszerek esetében, a minták mosószeres tisztítása a minta-előkészítés időtartamát jelentősen megnöveli, de bizonyos minták esetében a mosás alkalmazása elkerülhetetlen a megbízható mérési eredmény elérése érdekében. Az elvégzett tesztek eredményei alapján kidolgoztuk a műszer kőzet- és furadékminták vizsgálatára alkalmazható mérési protokollját, továbbá meghatároztuk a további fejlesztési irányokat.
RMS Value Measurement Using a Meter Based on ARM Cortex-MO Microprocessor
Authors: Eski Ajakida , Zavalani Orion , Komici Denald
Published: December 2017

In an electrical grid at the transmission and distribution system level, to guarantee the system security and the power quality, the RMS value of voltage and current is an important issue. We calculate the RMS value by processing the samples of a signal in the time domain. A software based explicit RMS converter is presented to transform the alternating voltage and current waveforms into their RMS values. This paper briefly covers the mathematics of RMS and offers an algorithm of RMS measurements based in FIR digital filter, which are more versatile when compared to the analogue filters in their characteristics such as programming flexibility, ability to handle both low as well as high frequency signals accurately. The measurement system is designed using ARM Cortex MO, PSoC4, CY8C4245AXI-483 architecture which is responsible for executing algorithms required for the calculation and ensures high performances and low cost. To check the accuracy of the metering system, the proposed metering values are compared to the readings of a standard FLUKE metering and it is concluded that the meter has been successfully completed. Since the proposed approach provides low cost solution for true RMS metering, it can be used in industrial and commercial applications especially as Digital panel meters and harmonic detectors.Â
Optimization of a Grid Connected Photovoltaic System using Fuzzy Logic Control
Authors: Idoniboyeobu Dikio C. , Orike Sunny , Biragbara Peace B.
Published: December 2017

Solar Photovoltaic energy generating system is one of the auspicious renewable energy resources that use the ample energy from the sun with clean, inexhaustible and environment friendly cyclic operations. However, the intermittent nature of the output power of PV systems reduces their reliability in delivering continuous power to customers. In this work, we propose an efficient and precise technique using a fuzzy controller and simulated in MATLAB environment, for tracking maximum power point in PV system. The fuzzy Logic model results were compared with other methods such as Perturb and Observe (P&O) and Proportional Integral Differential (PID) for validation. The results show that the Fuzzy Logic Controller, an Artificial Intelligence technique under various conditions was able to track the peak power point under lesser time - it took the fuzzy model less than 0.4 secs to attain maximum power while the other controllers took more than 0.7 and 0.8 seconds respectively. It was also observed that the fuzzy logic controller showed greater stability when the maximum power point was attained than the other controller. Hence the fuzzy logic controller gave a better overall performance than other conventional controllers.
Development of A Propagation Path Loss Prediction Model for Mobile Communication Networks Deployment in Osogbo, Nigeria
Authors: Lasisi Hammed
Published: December 2017

Path loss, a major parameter in the analysis and design of the link budget of a telecommunication system, could be explained as the reduction in power density of an electromagnetic wave as it travels through space, over a distance. Path loss prediction models are therefore vital tools in cell planning, cell parameter estimation, frequency assignments and interference evaluation. This paper reports on the development of a path loss prediction model that describes the signal attenuation between transmitting and receiving antennas as a function of the propagation distance and other parameters for Osogbo, Nigeria. The model is extensively useful for conducting feasibility studies for signal prediction, coverage optimization and interference analysis during the initial phase of network planning in the study area and other areas with similar environmental and propagation characteristics.
Embedded Communication System in a Local Meteorological Station in Lagos, Nigeria
Authors: Odubanjo Oduwole Funmilade , Babatunde Peter , Aluko Tolulope Olaide , Jimoh Oluwaseyi Emmanuel , Adebayo Timileyin Philip
Published: December 2017

Effective communication among units of a system is very essential because it determines the reliability of such a system. A local meteorological station has a target of atmospheric data acquisition, processing and output hence it is an embedded system with different units. Embedded communication among these units was facilitated and made effective by ESP8266 microcontroller a 32-bit Tensilica L106 running at 80MHz system clock equipped with 802.11 IEEE standard Wi-Fi protocols such as TCP/IP stacks. Full duplex data communication was adopted between the Access point server (station mode) and the client mode. The ESP8266 (station) reads all the sensors attached to it identifies the MAC (Media Access Control) address of the clients before processing its request. The data transmission between the client and the server (station) is through HTTP application. Universal Asynchronous Receiver Transmitter (UART) communication was implemented on the ESP8266 client sending the received data to the user computer. The computer uses RS232 logic while the ESP8266 uses TTL logic. USB/UART Bridge, FTD232 IC was adopted to connect ESP8266 with the output device (computer). The data received was viewed on the personal computer. These embedded communication routes and connections were adopted in a local meteorological station in Lagos.
Optimization of Stir Casting Process Parameters to Improve the Hardness Property of Al/RHA Matrix Composites
Authors: Durowoju Mondiu Olayinka , Agunsoye Johnson Olumuyiwa , Mudashiru Lateef Owolabi , Yekinni Adekunle Adetayo , Bello Solomon Kola , Rabiu Taiwo Olugbenga
Published: December 2017

The development of inexpensive materials reinforced metal matrix composites has become an important area of research interest in Material Science and its growing rapidly in various engineering fields. Therefore, the need for optimization becomes necessary in developing a composite material when different process parameters are to be used simultaneously. This is an efficient method to design a metal matrix composite with reliable and predictable mechanical properties which will be highly beneficial to the manufacturing industry. The application of trial and error method for the design of process parameters is found to be highly costly, time consuming and difficult to achieve desired products with optimum properties. In this study, composites of aluminium alloy reinforced with locally available inexpensive rice husk ash (RHA) was developed by stir casting method. In the manufacturing of the composites of Al/RHA, a three factor historical data (HD) model was used to design the experiment. The factors considered are weight fraction (5%, 10% and 15%), particle size (150 µm, 300 µm and 600 µm) and stirring time (10 mins, 20 mins and 30 mins) at stirring speed of 140 rpm, while hardness is the major response. Response surface methodology was used in this study to investigate the effect of the casting parameters for the performance of the Al/RHA composites. The Vickers hardness test was performed on the composite specimens. The hardness test revealed that the particle size, weight fraction and stirring time have their effect on the hardness of the composite. Highest hardness was obtained at 150 µm particle size, 15% weight fraction and stirring time of 30 mins. This study attempts to establish the trend between processing parameters with hardness of composite.
Gompertz Equation’s First and Second Derivatives for Kinetics Analysis of Batch Dark Fermentation on Bio-Hydrogen Production.
Authors: Barrera-Quintero Vladimir , Davila-Gomez Jose Angel , Rizo Acosta Pavel , Hernandez-Rojas Maria Elena , Baez-Pimiento Sandro
Published: December 2017

Based on results of different works carried out under the project of hydrogen and sustainable energies of the Department of Energy and the perspective shown by Bergues et al [6], concerning the presentation and interpretation of results obtained by Aleman [21], Sandoval and Yanez [10] and Morales and Argueta [22]; it is established a rigorous method for the analysis of the results obtained using as a model the Gompertz equation, and its first and second derivatives as indicators, that focuses on dark fermentation bio-hydrogen production, from the perspective of the conversion of the product –i.e., not of reagents–, for purposes of its maximization and operation control.
Inverse square law for light and radiation: A unifying educational approach
Authors: Voudoukis Nikolaos , Oikonomidis Sarantos
Published: December 2017

Many concepts in the physics curricula can be explained by the inverse square law.  Point-like sources of gravitational forces, electric fields, light, sound and radiation obey the inverse square law. This geometrical law gives the ability of unifying educational approach of various cognitive subjects in all the educational levels.   During the last years we have been using engaging hands-on activities to help our students in order to understand the cohesion in Nature and to export conclusions from experimental data. The development of critical thinking is also stimulated by student‘s experimental activities. Teaching students to think critically is perhaps the most important and difficult thing we do as science teachers. In this paper three activities are described, which were executed by students. These activities are concerning the electromagnetic radiation and the main goal is to confirm the inverse square law. We used three activities entitled as: “Inverse square law-Light”, “Photometer construction” and “Radioactive source”.The significant motive for this work constituted the following question: “Is it possible to find lab activities which bring out unification and a non-piecemeal description of physical phenomena, helping students to think critically?”.
Determination of Shear Strength Parameters of Rock Mass using Back Analysis Methods and Comparison of Results with Empirical Methods
Authors: Bakhtiyari Ehsan , Almasi Ali , Cheshomi Akbar , Hassanpour Jafar
Published: December 2017

In this study, using the collected data from 4 slope failures in one of the central mines of Iran, the shear strength parameters of jointed and crushed rock masses using back analysis method are calculated and its results are compared with the values obtained from the empirical methods.  In this regard, firstly, the identification of failures is investigated and then geometrical and geological engineering parameters of slopes are collected and recorded by field survey. At this stage, using the Hoek-Brown criterion, shear strength parameters of the rock mass are estimated. Then, using appropriate software for slope stability analysis (limit equilibrium method software: SLIDE and numerical method software: FLAC), and assuming that safety factor is one, the shear strength parameters for sliding surfaces are determined. Finally, the results obtained from this analysis are compared with the results of the empirical methods and then suggestions are made to modify the input data of empirical method
Assessment of the Mechanical Properties of Some Selected Sandcrete Hollow Blocks in Kogi State
Authors: Quadri Ajibola Ibrahim , Ijesoh Lawrence Irobekhian
Published: December 2017

The current wave of the collapse of building structure all over Nigeria necessitates the need to carry out research on the mechanical properties of sandcrete hollow blocks. This study looks into the quality of blocks produced by block industries in Kogi state, Nigeria to ascertain its water absorption ratio, compressive strength and sieve analysis. In order to clarify these problems, the study is directed towards testing the strength properties of commercially produced sandcrete blocks; to verify whether the sandcrete block can be improved to achieve good quality in the building industries.  A Total of five block industries were visited and twenty samples were picked at random from each of the selected block industry and also, soil samples obtained for soil tests in the laboratory. The analysis of results obtained was compared with the Nigerian Industrial Standard (NIS). The average water absorption rate of the sandcrete blocks for block industry D was found to be 12.5% higher than the 12% maximum requirement of the [9]. The average compressive strength values of the sandcrete blocks range between 0.64N/mm2 and 0.87N/mm2 which when compared with standard, was found to be below the minimum requirement of the [9]. Inadequate mix ratio was observed to be one of the factors of poor quality sandcrete block production in this area. The study recommends compliance monitoring by the various regulatory body to ensure good quality of sandcrete block production.
ANOMALI SINYAL SEBELUM GEMPABUMI SIGNIFIKAN DI INDONESIA YANG TERDETEKSI OLEH SUPERCONDUCTING GRAVIMETER
Authors: Priyambada Fajar Rachmadi , Yusuf Mahmud , Variandy Ervan Dany
Published: December 2017

ABSTRAK

Indonesia merupakan salah satu negara yang memiliki aktivitas kegempaan yang cukup tinggi. Pada studi ini dilakukan penelitian tentang perubahan nilai gravity selama gempabumi terjadi dengan menggunakan Superconducting Gravimeter (SG) yang terpasang di Badan Informasi Geospasial (BIG). Tujuan penelitian ini adalah untuk mencari anomali yang terekam oleh SG sesaat sebelum gempabumi tersebut terjadi. Metode yang digunakan adalah analisis spektogram dari data SG selama tahun 2011 didapatkan 17 gempabumi signifikan yang mempunyai Mw > 6. Hasil penelitian menunjukkan anomali sinyal beberapa jam sebelum kejadian gempabumi terjadi. Anomali tersebut terdapat pada frekuensi 0.03 Hz hingga 0.20 Hz, frekuensi ini berkorelasi dengan akumulasi stress dari nukleasi gempa utama. Dari penelitian ini disimpulkan bahwa SG mampu merekam sinyal gempabumi dengan cukup baik. Tingkat sensitifitas dan kestabilan SG yang sangat baik, dapat dimanfaatkan sebagai pendukung dalam memonitor adanya gempabumi, dan prekursor gempabumi.

 

ABSTRACT

Indonesia is one of the most country which had high level of seismic activities. In this study we had research about gravity change’s value during earthquakes by using Superconducting Gravimeter (SG) which installed on Badan Informasi Geospasial, Cibinong. Superconducting Gravimeter is the most sensitive instrument to measure gravity change’s continuously in low frequencies. This research purposed to found anomaly that recorded by SG before an earthquake happened. During 2011, we found significantly earthquakes with Mw > 6. Using spectrogram analysis, we got signal anomaly few hours before earthquake happened. Frequencies of anomaly are between 0.03 Hz up to 0.20 Hz,  this frequencies are correlated with stress accumulation of nucleation mainshock. We concluded Superconducting Gravimeter can be use for supporting research about earthquake early warning system. Sensitivity and stability are so good and can be able to support monitoring earthquakes, and earthquake’s precursor.

 
PENGGUNAAN KINEMATIK GNSS PRECISE POINT POSITIONING (PPP) PADA SURVEI GAYABERAT AIRBORNE SULAWESI
Authors: Hartanto Prayudha
Published: December 2017

                                                              ABSTRAK

Metode Precise Point Positioning (PPP) adalah metode penentuan posisi teliti yang hanya menggunakan sebuah receiver GNSS dual frekuensi. Metode ini dapat digunakan untuk menentukan posisi teliti objek-objek yang diam (static) maupun bergerak (kinematic). Pada penelitian ini, akan dipaparkan mengenai penggunaan kinematik PPP dalam penentuan posisi pesawat terbang pada survei gayaberat airborne di Sulawesi tahun 2008. Data yang digunakan adalah jalur terbang pesawat pada day of year (DOY) 291 dan 274. Perangkat lunak yang digunakan adalah Waypoint® Grafnav. Hasil pengolahan menggunakan metode PPP tersebut kemudian dibandingkan dengan hasil pengolahan data Diferensial GPS (DGPS) dengan 1 titik ikat untuk DOY 291 dan 2 titik ikat untuk DOY 274. Hasil perbandingan pada DOY 291 menunjukkan nilai RMS untuk arah timur, utara dan tinggi masing-masing sebesar 0,024 m; 0,020 m dan 0,039 m. Pada DOY 274, RMS yang diperoleh adalah 0,032 m; 0,011 m dan 0,058 m masing-masing untuk arah timur, utara dan tinggi. Hasil-hasil tersebut mengindikasikan bahwa metode PPP dapat digunakan untuk menentukan posisi pesawat terbang dengan fraksi ketelitian sentimeter. Tingkat ketelitian posisi ini sudah memenuhi syarat untuk digunakan pada survei gayaberat airborne.

Kata kunci: GNSS, kinematik PPP, gayaberat airborne, DGPS

 

                                                                ABSTRACT

The Precise Point Positioning (PPP) is a positioning method which only use a dual frequency GNSS receiver. This method can be used to determine the precise position of either static (static) or moving objects (kinematic). In this paper, we will discuss the application of kinematic PPP for the 2008 Sulawesi airborne gravity survey. By using a commercial GNSS processing software called Waypoint® Grafnav, we determine the PPP solutions for the aircraft trajectory of the day of year (DOY) 291 and 274. Each solution then be compared to the Differential GPS (DGPS) results, which use one base station for DOY 291 and two reference stations for DOY 274. The PPP solution of DOY 291 gives RMS error of 0.024 m eastward, 0.020 m northward, and 0.039 m upward. Moreover, the comparison of DOY 274 gives RMS error of 0.032 m eastward, 0.011 m northward, and 0.058 m upward. These centimeter level RMS errors show that PPP is a compatible positioning method for airborne gravity survey.

Keywords: GNSS, kinematic PPP, airborne gravity, DGPS
ESTUDO DOS EMPREENDIMENTOS DENOMINADOS SHOPPING CENTERS EM CAMPOS DOS GOYTACAZES: UMA ANÁLISE SOBRE OS CRITÉRIOS DA ABRASCE
Authors: Sales Nathália Oliveira , Dos Reis Túlio Baita
Published: December 2017

O presente trabalho tem por objetivo principal, fazer um levantamento dos empreendimentos centros comerciais intitulados Shopping centers da cidade de Campos dos Goytacazes/RJ e verificar se os mesmos atendem os critérios da ABRASCE (Associação Brasileira de Shopping centers). Para tanto, foi realizado um estudo nos oito centros comerciais da cidade de Campos dos Goytacazes, desse modo foram selecionados: Boulevard Shopping Campos, Campos Shopping, Central Plaza Shopping, Parque Centro Shopping, Pelinca Square Center, Shopping Avenida 28, Turf Centro Shopping e Vips Center Shopping, os mesmos foram objetos de estudos por obter a nomenclatura “Shopping” em seus nomes. Os dados coletados foram obtidos a partir de entrevistas realizadas com a gerência de cada estabelecimento e de pesquisa descritiva de acordo com os critérios da ABRASCE e referencial teórico levantado. O objetivo geral da pesquisa foi obtido, pois o levantamento realizado verificou que dos 8 (oito) empreendimentos estudados intitulados Shopping centers, apenas 1 (um) atendem a todos os critérios da ABRASCE.
PANORAMAS METODOLÓGICOS EM REABILITAÇÃO NEUROPSICOLÓGICA NO BRASIL: DA TEORIA À PRÁTICA
Authors: Lopes e Santos Lucas Emmanuel , Da Cunha Pereira Flávia , Souza Oliveira Cecília
Published: December 2017

A neuropsicologia é a ciência que trata das relações entre o cérebro e o comportamento, a partir da investigação de alterações cognitivas e comportamentais associadas às lesões cerebrais e distúrbios neurológicos e/ou psiquiátricos. Dentre as diversas propostas de intervenção que constituem o domínio da neuropsicologia, a reabilitação neuropsicológica (RN) tem a finalidade de capacitar pacientes e familiares a conviver, reduzir ou superar os déficits cognitivos resultantes de lesão ou transtorno neurológico. O presente estudo teve como objetivo realizar uma revisão sistemática da literatura e traçar um panorama do desenvolvimento teórico e prático da RN no Brasil. A pesquisa foi realizada na base de dados LILACS, utilizando-se o unitermo “reabilitação neuropsicológica”. A amostra final resultou em um total de 22 artigos científicos, abrangendo o período de 2000 a 2016. Evidenciou-se que: a) o maior número de publicações sobre o tema se deu no ano de 2011, representando 18,2% da produção total; b) a grande maioria dos trabalhos publicados se refere à estudos de caso, totalizando 36% da produção; c) apenas 18% das publicações apresenta metodologia detalhada do plano de reabilitação neuropsicológica utilizado. Os resultados nos permitem concluir que estudos acerca dos benefícios da reabilitação neuropsicológica ainda são escassos no Brasil.
THE DESIGN AND APPLICATION OF ENGLISH ONLINE LEARNING SYSTEM BASED ON BS
Authors: Manzoor Areeba
Published: December 2017

Since the inception of the new era, the development of the Internet technology has also promoted the upgrading of electronic equipment. And the online education mode budding at the end of last century has also yielded extraordinary results; especially for English, its online learning system has become more mature because of its needs of more voice communication and training. Taking this as the research object, this paper firstly introduces the related concepts, and then conducts a demand analysis of the system, and finally elaborates the related information about the system structure and database, hoping to provide a reference for the related research.
Principal component analysis implementation for brainwave signal reduction based on cognitive activity
Authors: Azhari Ahmad , Mardhia Murein Miksa
Published: December 2017

Human has the ability to think that comes from the brain. Electrical signals generated by brain and represented in wave form.  To record and measure the activity of brainwaves in the form of electrical potential required electroencephalogram (EEG). In this study a cognitive task is applied to trigger a specific human brain response arising from the cognitive aspect.  Stimulation is given by using nine types of cognitive tasks including breath, color, face, finger, math, object, password thinking, singing, and sports. Principal component analysis (PCA) is implemented as a first step to reduce data and to get the main component of feature extraction results obtained from EEG acquisition. The results show that PCA succeeded reducing 108 existing datasets to 2 prominent factors with a cumulative rate of 65.7%. Factor 1 (F1) includes mean, standard deviation, and entropy, while factor 2 (F2) includes skewness and kurtosis.
Waist-to-height ratio as index of cardiometabolic risk among the doctors
Authors: Mozaffor Miliva , Rahman Md. Matiur , Tabassum Mariya , Mollah Forhadul Hoque
Published: December 2017

The aim of this study was to see the cardiometabolic risk among doctors using waist-to-height ratio index as tool. Cardiometabolic risk is an umbrella term that includes all the risk factors of diabetes and cardiovascular disease. The study was conducted among 195 doctors. According to waist-to-height ratio index 167 (85.6%) doctors had cardiometabolic risk. Waist-to-height ratio index was found good (area under the curve >0.5, sensitivity 88.1%, specificity 23.2%, positive predictive value 53.9%, and negative predictive value 66.7%) for their predictive value of cardiometabolic risk. Age grouping was done and found that no age group was free from cardiometabolic risk.
Analysis of Naturally Occurring Resistance-Associated Variants to NS3/4A Protein Inhibitors, NS5A Protein Inhibitors, and NS5B Polymerase Inhibitors in Patients With Chronic Hepatitis C
Authors: Sun Danhui , Dai Mingjia , Shen Shanshan , Li Chunyang , Yan Xuebing
Published: December 2017

The first NS3/4A hepatitis C virus (HCV) protease inhibitors telaprevir and boceprevir were approved in 2011, and both NS5A and NS5B polymerase inhibitors were launched. Recently, direct-acting antivirals (DAAs) have had a major impact on patients infected with HCV. HCV DAAs are highly
effective antivirals with fewer side effects. DAAs have been developed for the treatment of HCV infection in combination with PEG-IFN-α/RBV as well as in IFN-free regimens. However, some drug resistance mutations occur when a single oral DAA is used for treatment, which indicates that
there is a low-frequency drug resistance mutation in HCV patients before the application of antiviral drugs. Our research showed that natural resistance to HCV DAAs was found in treatment-naive CHC patients and that the drug resistance mutation rates differ in various HCV genotypes. Many challenges
posed by natural resistance should be considered in the context of DAA therapies.
The Effect of Strontium Ranelate Gel on Bone Formation in Calvarial Critical Size Defects
Authors: El Nahass Hani , El Din Nada Nour , Nasry Sherine Adel
Published: December 2017

AIM: The current study was designed to investigate the effectiveness of locally applied Strontium ranelate to induce bone formation.MATERIALS AND METHODS: Forty-eight female rats were divided into six groups (eight rats in each group): The three test groups included Strontium (SR) 2.5 mg, 5 mg and 10 mg that was dissolved in methylcellulose gel. The control groups included methylcellulose, simvastatin 5 mg and a negative control where the defect was left to heal without any intervention. At 44 days the groups were sacrificed, and the bone defects were assessed histomorphometically to assess bone formation. The data was statistically analysed.RESULTS: There was a statistically significant difference in the amount of new bone formation between all groups, where the 2.5 mg SR group showed the highest median bone percentage, is 41.95 %, followed by the 5, and 10 mg SR demonstrating a median bone are a percentage of 39.89%, and 30.19% respectively. Simvastatin showed a median bone percentage of 36.07 %, while the methylcellulose and the negative control groups demonstrated the lowest median area percentage of 23.12 and 20.70 % respectively.CONCLUSIONS: The study showed that the local application of an SR could up-regulate the bone formation and may prove to be a cost-effective method of bone regeneration.
Experiences of Barriers and Motivators to Weight-Loss among Saudi People with Overweight or Obesity in Qassim Region - A Qualitative Study
Authors: Al-Mohaimeed Abdulrahman A. , Elmannan Abeer Abuzeid Atta
Published: December 2017

BACKGROUND: Obesity has become a global health threat. Saudi Arabia ranks among the countries with high obesity and overweight rates. This study aims to explore experiences of Saudi people with overweight or obesity with a particular focus on the perceived barriers and motivators to weight loss.MATERIAL AND METHODS: We used a qualitative approach to recruiting a purposive sample using maximum variation sampling technique. Those who had previously attempted weight loss at least once were included in the study. In-depth interviews were conducted, transcribed and/ or audiotaped. Interviews continued until saturation was reached. The qualitative content analysis was performed.RESULTS: A total of 19 males and 18 females participated in this study with a mean Body Mass Index (BMI) of 32.6 kg/m2. Their main triggers to weight loss were concerns about overall health and the desire to improve their looks. Declining motivation, lack of family support and unhealthy eating during social gatherings were perceived as the main barriers. Motivating factors included concerns about health, family support, and availability of exercise facilities.CONCLUSION: Factors responsible for a successful weight- loss is context-specific. This study has shown several barriers as well as motivators, which play an important role in weight reduction and maintenance.
The Prevalence and Risk Factors of Early Arrhythmias Following Pediatric Open Heart Surgery in Egyptian Children
Authors: Abdel Gawad Tarek Ahmed , Elguindy Waleed Mohamed , Youssef Omneya Ibrahim , Abosalem Tamer Ashraf
Published: December 2017

AIM: This study aimed to assess the prevalence of early postoperative arrhythmias after cardiac operation in the pediatric population, and to analyse possible risk factors.MATERIAL AND METHODS: Cross-sectional study included 30 postoperative patients, with age range four up to 144 months. They were selected from those admitted to the Cardiology Unit in the Pediatric department of Ain Shams University hospitals, after undergoing cardiopulmonary bypass (CPB) surgery for correction of congenital cardiac defects. All patients had preoperative sinus rhythm and normal preoperative electrolytes levels. All patients’ records about age, weight, type of surgery, intraoperative arrhythmias, cardiopulmonary bypass time, ischemic time and use of inotropic drugs were taken before they were admitted to the specialised pediatric post-surgery intensive care unit (ICU).RESULTS: Arrhythmia was documented in 15 out of 30 patients (50%). Statistically significant difference between the arrhythmic and non-arrhythmic group were recorded in relation to the age of operation (23 vs 33 months), weight (12 vs. 17 kg), ischemic time (74.5 vs. 54 min), cardiopulmonary bypass time (125.5 vs. 93.5min), inotrope use (1.6 vs. 1.16) and postoperative ICU stay (5.8 vs. 2.7 days), P<0.05.CONCLUSION: Early postoperative arrhythmias following surgery for congenital heart disease are relatively frequent in children (50%).Younger age, lower body weight, longer ischemic time and bypass time, and more inotrope use are all risk factors for postoperative arrhythmias and lead to increase the hospital stay.