bluuebunny/crossref_metadata_2025_split huggingface dataset:
Kontribusi Kuat Lentur Polikarbonat Pada Pelat Beton Berpori (The Contribution of Polycarbonate Flexural Strength into Porous Concrete Slab)
Authors: Nurtanto Dwi 
Published: February 2018

Polycarbonate is thermoplastic polymer group. It is easily formed using heat. Plastic has many advantages, namely thermal resistance compared to other types of plastic, resistant to impact, and very clear. The purpose of this research is to replace steel in reinforced concrete with polycarbonate and it is expected to contribute a good flexural strength on the porous concrete slab. The test specimen is 40x40x5 cm and the variation widths of polycarbonate are 2 cm, 4 cm, and 6 cm. Polycarbonates are arranged in the x direction and y direction, such as the reinforcement in concrete slab. The distance between the pores in concrete slab is 8 cm. Once the concrete aged 28 days, the next step is testing the flexural strength. The results show the concrete compressive strength is 24.699 MPa. The biggest average flexural test is in porous concrete slab with diameter of reinforcement is 6 mm. Meanwhile, for porous concrete slab without reinforcement and porous concrete slab with polycarbonate have flexural strength which is almost the same. This is because there is no bond between polycarbonate and concrete, so that the adhesion between them is very small and virtually non-existent. In addition, the results show that there is no contribution of polycarbonate flexural strength in concrete slab.
Polikarbonat adalah suatu kelompok polimer termoplastik yang mudah dibentuk dengan menggunakan panas. Plastik ini memiliki banyak keunggulan, yaitu ketahanan termal dibandingkan dengan plastik jenis lain, tahan terhadap benturan, dan sangat bening. Tujuan penelitian ini adalah mengganti material baja pada beton bertulang dengan polikarbonat dan diharapkan dapat memberikan kontribusi kuat lentur yang baik pada pelat beton berpori. Ukuran benda uji adalah 40x40x5 cm, dimana variasi ukuran lebar polikarbonat adalah 2 cm, 4 cm dan 6 cm. Polikarbonat disusun dalam arah x dan arah y, seperti penulangan pada pelat beton. Selanjutnya dilakukan pengecoran. Jarak antar pori pada pelat beton adalah 8 cm. Setelah beton berumur 28 hari maka dilakukan pengujian kuat lentur. Hasil penelitian menunjukkan kuat tekan karakteristik beton adalah sebesar 24.699 MPa. Hasil kuat lentur rata-rata yang paling besar terjadi pada pelat beton berpori dengan tulangan diameter 6 mm, sedangkan untuk plat beton berpori tanpa tulangan dan dengan polikarbonat hasil kuat lenturnya hampir sama. Hal ini dikarenakan tidak adanya lekatan antara lembaran polikarbonat dan beton, sehingga daya lekat polikarbonat terhadap beton sangat kecil dan bisa dikatakan tidak ada. Selain itu, hasil menunjukkan bahwa tidak adanya kontribusi kuat lentur polikarbonat pada beton berpori.
Science Technology Engineering and Mathematics (STEM) Education Approach against a Microscopic Representation Skill in Atom and Molecule Concept
Authors: Wisudawati Asih Widi 
Published: February 2018

ABSTRACT: The aim of this research in to know microscopic representation change in atom and molecule concept which is influenced by STEM Education. This research is one of the sequences in Research and Development of test instrument by chemistry software. The kind of this research is fieldwork research with one group pre-test and post-test design. Subjects in this research are the twenty-seven students in MBS Senior High School grade 11 th in Yogyakarta region. STEM Education can improve student microscopic representation skill from 30.18 to 54.62 in average score and based on student result in painting molecule with ChemDraw and Avogadro's application, there are a lot of improvement in understanding concept.
Correlation of Peer Assessment with Learning Achievement in Predict Observe Explain (POE) Learning
Authors: Arlianty Widinda Normalia 
Published: February 2018

ABSTRACT: This study aims to determine the correlation between peer assessment with learning achievement. The learning achievement was obtained from the value of chemistry practicum by taking three values, namely the value of responses and the pretest values taken using written test, and the value of practical skills taken using the peer assessment observation sheet. This research is a descriptive study. The sample of this research is second-semester student, force 2015/2016 Chemical Education Study Program, Islamic University of Indonesia. Data analysis using nonparametric statistic correlation test Spearman Rank Order Correlation. Based on statistical analysis, it is found that there is a correlation between peer assessment and student learning achievement: 1) correlation of peer assessment with response 0,722; correlation of peer assessment with pretest of 0.651; and the correlation of peer assessment with practical skills of 0.617
PROCESS TECHNOLOGY OF FABRICATION NO2 GAS SENSOR DEVICES WITH ACTIVE LAYER In2O3
Authors: Widodo Slamet 
Published: February 2018

This paper discuss the design and fabrication of NO<sub>2 </sub>gas sensor based on metal oxide using thick film technology was described. The design of gas sensor is consisted of components, i.e. heater, electrode (interdigital fingers) and sensitive layer from In<sub>2</sub>O<sub>3</sub> material. This sensor has been designed as multilayers with heater and both electrodes in one surface, in accordance with miniaturisation aspect, heat distribution and less consumption of energy from the sensor device. The heater and electrode were fabricated on alumina substrate (aluminum oxide/Al<sub>2</sub>O<sub>3</sub>) with silver paste. The In<sub>2</sub>O<sub>3 </sub>layer provides\ resistance change when it is exposed by NO<sub>2</sub> gas. It indicates that this sensor device has a potency to be used as NO<sub>2 </sub>detector.
BIOSYNTHESIS OF BIOSURFACTANT BY PSEUDOMONAS AERUGINOSA USING CASSAVA FLOUR INDUSTRIAL WASTEWATER AS MEDIA
Authors: Suryanti Venty , Hastuti Sri , Handayani Desi Suci 
Published: February 2018

<span>Biosynthesis of biosurfactant by </span><em>Pseudomonas </em><em>aeruginosa</em><span> have been prepared using cassava flour industrial wastewater (</span><em>manipueira</em><span>) as medium. The optimum condition of the biosurfactans biosynthesis was obtained using media containing nutrient broth and manipueira without centrifugation (NBM) with 4 days fermentation. UV-Vis and FT-IR spectra indicated that the biosurfactant was a rhamnolipid containing hydroxyl, ester, carbocylic and aliphatic carbon chain functional groups. Biosurfactant exhibited critical micelle concentration (CMC) value of 576 mg/L and surface tension value of 0.045 N/m. The biosurfactant was able to decrease the interface tension and form emulsion with benzene, toluene, gasoline and palm oil. This biosurfactant showed w/o emulsion system.</span>
OPTIMIZING OF TIO2 SEPARATION FROM BANGKA ILMENITE BY LEACHING PROCESS USING HCL
Authors: Wahyuningsih Sayekti , Hidayatullah Hari , Pramono Edi 
Published: February 2018

<span>Separation of titanium dioxide (TiO</span><sub>2</sub>) from ilmenite Bangka has been done byleaching processusing HCl. Before the leaching process, ilmenite was roastedat 900<sup>o</sup>C for pre-oxidation (preliminary - oxidation). Leaching process carried out by variation of HCl concentration and Fe<sup>0 </sup>reducing agents. While the re-deposition of dissolved Ti<sup>4+ </sup>ion achieved by hydrolysis - condensation using 2-propanol-H<sub>2</sub>O solvents. Leaching the pre-oxidazed ilmenite shows the phase change of pseudobrokite (Fe<sub>2</sub>TiO<sub>5</sub>) into hematite (Fe<sub>2</sub>O<sub>3</sub>) and synthetic rutile (TiO<sub>2</sub>). Formation of the synthetic rutile was characterized by the loss of intensity of Fe<sub>2</sub>TiO<sub>5</sub><span class="apple-converted-space"> at 26.65º and the increasing intensity of rutile TiO</span><sub>2</sub><span class="apple-converted-space"> at 27.49º.The dissolution rate of both titanium and iron was found to be increased, generally, by increasing acid concentration in case of HCl as well as by increasing ilmenite: Fe</span><sup>0</sup><span class="apple-converted-space"> ratio. Precipitation of the dissolved titania with 2-propanol -H</span><sub>2</sub>Oof 8:2(v /v) produced anatase TiO<sub>2 </sub>due to the hydrolysis and condensation of Ti-tetra isopropoxide complexes.
HIGH PERFORMANCE LIQUID CHROMATOGRAPHY METHOD VALIDATION OF α-MANGOSTIN ASSAY IN MANGOSTEEN (Garcinia mangostana L.) FRUIT RIND EXTRACT FORMULATED IN ORAL SOLUTION
Authors: Nurhidayati Liliek , Sofiah Siti , Sumarny Ros , Caesar Kevin 
Published: February 2018

<p>Mangosteen fruit rind extract contain a lot of antioxidants. α-Mangostin is a component in mangosteen fruit rind that has highest antioxidant effect. The oral solution containing mangosteen fruit rind extract is required an assay method for quality assessment. Determination of a very low concentration of analyte in sample with very complex matrix, such as α-mangostin in oral solution, needs a selective and sensitive method, such as high performance liquid chromatography (HPLC). In this study, α-mangostin assay was performed by reverse phase HPLC system using octadecylsilane (C18) as stationary phase, methanol-water (90:10) as mobile phase, the flow rate is 1.0 mL/min, and the UV detector at 316 nm. The retention time of α-mangostin was 9.622 minutes. Peak of α-mangostin was well separated with resolution of 1.725. Linearity was in the range of 1.67-5.01 ppm with correlation coefficient of 0.9986. The relative standard deviation (RSD) was 1.30 %, the recovery was in the range of 95.80-100.76 </p>
REDUCTION ON THE LEVELS OF TANNINS FROM STEVIA REBAUDIANA EXTRACT USING ACTIVATED CARBON
Authors: Kusumaningsih Triana , Asrilya Nur Jannah , Wulandari Suci , Wardani Dewi Restu Tri , Fatihin Khoirul 
Published: February 2018

<p>Extraction of tannins from leaves of <em>Stevia rebaudiana</em> using ethanol 30% with a temperature variation of 30, 50, 70 and 100<sup>o</sup>C for 3 hours was performed. Reduction on the levels of tannins in <em>stevia</em> extract is done by using activated carbon.<br /> The results showed the greatest weight of the extract at 70<sup>o</sup>C is 1.008 g and extract relatively alkaline pH. Reduction on the levels of tannins on <em>stevia</em> extracts done by passing the extract of <em>stevia</em> in the burette containing activated carbon as much as 4 times the cycle. Tannin concentration was reduced by 39.74%.</p>
PHOTOCATALYTIC ACTIVITY OF TiO2 NANO SUPPORTED ON MEMBRANE CELLULOSE ACETATE/NATA DE COCO (CA/NDC) IN PHOTODEGRADATION OF METHYLENE BLUE
Authors: Prawithasari Roro Ernia , Fadilah Ilma , Mudjijono Mudjijono , Saraswati Teguh Endah , Darwanto Dwidjono Hadi 
Published: February 2018

<p>Study of synthesis and effectiveness of membrane catalyst of cellulose acetate/nata de coco-TiO<sub>2 </sub>nano (CA/NDC-TiO<sub>2</sub> nano) in photodegradation of methylene blue in batch system has been investigated. TiO<sub>2</sub>nanoparticles were synthesized by hydrothermal method followed by calcination at 450<sup>o</sup>C. Scanning Electron Microscopy (SEM) images indicate nano TiO<sub>2</sub> has been successfully synthesized with average particle diameter as 88,63±4,37 nm. X-ray diffraction pattern (XRD) of nano TiO<sub>2</sub> shows some characteristic peaks of anatase TiO<sub>2</sub> were still existed. Membrane photocatalyst of CA/NDC- nano TiO<sub>2</sub> was prepared via phase inversion method by mixing TiO<sub>2</sub> nanoparticles with CA casting solution. Thermogravimetric analysis shows three decomposition steps of CA/NDC-nano membrane as well as CA/NDC membrane. Photodegradation of methylene blue was conducted with nano-TiO<sub>2</sub> particles and CA/NDC-TiO<sub>2</sub> membrane for 50 minutes in batch system. The absorbance changes were measured by spectrophotometer at wavelength of 664.6 nm. The result shows the photodegradation rections tended to follow second order reaction. According to the rate constant value, <em>k</em>, the photocatalytic effectivity using CA-NDC/nano TiO<sub>2</sub> membrane and nano TiO<sub>2</sub>photocatalysts in metilen blue photodegradation, statistically were not significantly different.</p>
The capabilities that count for early professional success in Pharmacy: A case study of graduates, employer and course teaching team perspectives
Authors: Tee Lisa , Ferns Sonia , Hughes Jeffery D 
Published: February 2018

This study gathered and analysed the perceptions of graduates, employers, and the course team regarding graduate capabilities required for early professional success in pharmacy and the extent to which these capabilities are demonstrated in new graduates. The Graduate Employability Indicator (GEI) surveys were administered online to gather stakeholders’ perceptions about the Bachelor of Pharmacy offered at a large Australian university. The GEI asks graduates the extent to which their course experience contributed to achievement of the capabilities, and asks employers and course teams about the extent to which new graduates demonstrated the capabilities. This study also assessed the incentives and disincentives of the course team for assisting to develop work-related skills, attributes and personal qualities. In total, 95 graduates, 109 employers and 42 members of the course team participated in the survey. The findings indicated that graduates preferred earlier professional placement in the course. Employers identified communication and professional skills as the most useful capabilities for new graduates. Members of the course team identified benefits to the students, industry and university as the main incentives for developing graduate employability. Both employers and course team members perceived the use of technology demonstrated by the graduates as important, however the graduates perceived this as much less important compared to other capabilities This study provided an evidence-based approach to engage the course team in curriculum renewal for the Bachelor of Pharmacy program. Data collected using the GEI tool provided valuable information for reshaping the curriculum structure.
Growth of Spiral Vortices in a Globally Unstable Region on a Rotating Disk
Authors: Keunseob Lee , Yu Nishio , Seiichiro Izawa , Yu Fukunishi 
Published: February 2018

Background:Instabilities on a rotating disk ﬂow can be classiﬁed into two distinct groups, convective instability and global instability. Contrary to the convective instability, many characteristics of the global instability are left unknown despite of a lot of researches.Objective:The study investigates the characteristics of the globally unstable mode.Method:Numerical simulation is carried out by a finite difference method. The simulation code solves the full Navier-Stokes perturbation equations and the continuity equation.Results:Four cases with azimuthal domain sizes of 2π/10, 2π/70, 2π/80 and 2π/90 are compared. In all cases, a short-duration wall-normal random suction and blowing is introduced from the wall at the beginning of the computation. In the computation for the wider size 2π/10 domain, wavenumber components of 70, 80 and 90 are all found to co-exist in the ﬂow ﬁeld, with the wavenumber 80 component being much stronger than the other two components. The strength of the wavenumber 80 component is equivalent to the narrower domain case. For the other two wavenumber components of 70 and 90, the strengths in the wider domain case are much lower compared to the corresponding narrower domain cases. When the same wavenumber components are compared between the wider and narrower domain computations, no difference can be found, indicating that each wavenumber component grows by the global instability.Conclusion:The results imply that the amplitude saturation levels of wavenumber components 70 and 90 are suppressed by the wavenumber 80 component through the nonlinear effect.
Relation Between Convective Instability and Global Instability on a Rotating Disk
Authors: Keunseob Lee , Yu Nishio , Seiichiro Izawa , Yu Fukunishi 
Published: February 2018

Background:
The velocity fluctuations grow dominantly by convective instability form 32 spiral vortices which are stationary with respect to the disk. However, recent researches suggest that the global instability plays a role in the boundary layer transition.

Objective:
The study looks into the relation between convective instability and global instability.

Method:
A finite difference method is used to carry out numerical simulation. The full Navier-Stokes perturbation equations and the continuity equation solved by simulation code.

Results:
A disturbance is continuatively introduced to excite the convectively unstable mode, which successfully generates a flow field with 32 spiral and stationary vortices. Next, a short-duration artificial disturbance with an azimuthal wavenumber of 64 is introduced at Reynolds number of 530 in order to introduce a velocity fluctuation of the traveling mode, which is globally unstable. It is shown that the source of vibration for the globally unstable mode exists between Reynolds number of 560 and 670. Finally, the global and traveling wavenumber 64 component is excited in a flow field which is dominated by the convective and stationary wavenumber 32 component. It is shown that the wavenumber 64 component grows by the global instability even when the excitation is very weak.

Conclusion:
The results suggest that the reason why the globally unstable mode has not been observed in experiments is because the boundary layer transition caused by the convective instability takes place before the globally unstable mode can start to grow by itself.
KONTRIBUSI FATWA MUI NO.11 TAHUN 2012 TENTANG ANAK HASIL ZINA DAN PERLAKUAN TERHADAPNYA DALAM HUKUM KELUARGA ISLAM DI INDONESIA
Authors: Ilhami Haniah 
Published: February 2018

AbstractIdentifying the contributions of Fatwa MUI No. 1 year 2012 in Indonesian Islamic Family Law, this research finds that the Fatwa has contributed in 2 (two) positions. First, the Fatwa contributes to the development of the substance of Islamic family law through its position as the clarification and explanation of the Constitutional Court Decision Number 46/PUU-VIII/2010, as the confirmation of the prohibition of adultery, as the recommendation for the Government, and as the regulation that provides children’s protection. In the other side, the Fatwa contributes practically in Religious Courts through its contribution as the Judge's guidance, completes the absence of related regulations, and the source of material law. IntisariDalam kajian terhadap Fatwa MUI No. 11 Tahun 2012, penelitian ini menemukan bahwa Fatwa MUI No.11 tahun 2012 telah memberikan kontribusi bagi hukum keluarga Islam di Indonesia dalam 2 (dua) bentuk. Pertama, fatwa berperan terhadap pengembangan substansi hukum keluarga Islam karena telah memberikan klarifikasi dan penjelasan atas Putusan MK Nomor 46/PUU-VIII/2010, mengatur larangan perbuatan zina, sebagai rekomendasi bagi Pemerintah dalam penyusunan peraturan perundang-undangan terkait zina, dan memberikan perlindungan hukum bagi anak hasil zina. Kedua, fatwa berkontribusi dalam tataran praktis di Pengadilan Agama sebagai pedoman Hakim, pengisi kekosongan hukum, dan sebagai sumber hukum materiil.
Biometría y vigilancia social en Sudamérica: Argentina como laboratorio regional de control migratorio
Authors: Santi Pereyra Silvana Estefanía 
Published: February 2018

<p>La biometría humana aplicada por el Estado con fines de control social ejemplifica su propia transformación como actor político. La inserción y aplicación de la biometría en la región sudamericana con fines documentarios, previsionales, impositivos, de control electoral, de beneficios sociales, y de control migratorio, entre otros, revelan la necesidad de contar con más estudios que focalicen y problematicen su papel actual. En este sentido, el propósito de este trabajo sostiene que la biometría aplicada por el Estado especialmente al control migratorio es una forma de biopoder en sentido foucaultiano. Para situar el trabajo, se analizará la transformación reciente del Estado argentino, desde 2003 hasta 2015, interrogando a través de disposiciones y discursos de funcionarios públicos ¿Desde cuándo la biometría se adopta como opción política para el control migratorio?, ¿Cómo llega a posicionarse en Argentina?, y ¿Qué rol juega Argentina como país difusor de implementaciones biométricas en la región sudamericana?<strong> </strong></p>
El Papa Francisco I y la sexualidad: políticas de dislocación
Authors: Sgró Ruata María Candelaria , Vaggione Juan Marco 
Published: February 2018

<p>Con la elección de Francisco I comenzaron a circular diferentes lecturas sobre una nueva etapa de la Iglesia católica. Algunas declaraciones del Papa generaron un clima de expectativas y una corriente de opinión favorable sobre su pontificado. En este marco, nos preguntamos por la política sexual de la Iglesia católica en la etapa iniciada por el nuevo Pontificado. Con este objetivo, analizamos las principales declaraciones públicas de Francisco I sobre sexualidad (homosexualidad, aborto) y la concreción del Sínodo de la Familia como instancia en la que la Iglesia debate su postura oficial sobre moral sexual. El trabajo identifica una serie de desplazamientos como emergentes de una política de dislocación que permiten caracterizar el posicionamiento del Papa sobre el orden sexual. </p>
Can Social Media Interaction and Message Features Influence Nonprofessional Investors' Perceptions of Firms?
Authors: Kipp Peter C. , Zhang Yibo (James) , Tadesse Amanuel F. 
Published: February 2018

ABSTRACT
We investigate the impact of social media messages on nonprofessional investors' assessments of management credibility and firm value. In a between-participants experiment, we examine the joint effect of social media message vividness, valence, and micro-blogger influence on nonprofessional investors' assessments of management credibility and firm value. We find that when social media messages are pallid and negative (positive), high micro-blogger influence decreases (increases) nonprofessional investors' assessments of management credibility. In contrast, the effect is absent when messages are vivid. Further, we find that the effect of micro-blogger influence on nonprofessional investors' assessments of blogger credibility and management credibility is mediated by social media interactions. The assessment of management credibility, in turn, significantly impacts nonprofessional investors' firm valuation assessment. The results have implications for regulators (SEC 2013) that may wish to update their guidance to managers on how to monitor or even control nonprofessional investors' interaction on social media platforms.
Data Availability: Contact the authors.
Study the Effect of the Homemade Nitrogen Laser System in Medical Field
Authors: B. Mohammed Saif , M. Najim Jassim , N. Mohameed Akram 
Published: February 2018

A high power N2 laser of the three stage-Blumlein circuit designed, which consist two identical electrodes, four capacitors and three spark gaps which designed discharge geometry with minimum inductance. This system gives a maximum energy 18 mJ with a pulse time 6.65 ns and wave length 337.1 nm. The distance between spark gap terminals has large effect on the output energy. The ideal distance were 11 mm between the terminals for the first spark gap and 4 mm between the terminals for the second spark gap, the distance between the terminals of the spark gaps has a significant effect on the resulting energy, where the energy decreases when the distance between the terminals of the first and second spark gaps exceeds or Less than from the optimum distances. The effect of N2 laser on the viability of Staphylococcus that isolated from wounds, the samples of bacteria were irradiated with 337.1 nm .N2 laser using 10 pulses/second repetition rates at 10,15 minutes exposure times. The results showed that the viability of bacteria decreased with increasing the exposure time to N2 laser.