21 research outputs found
Pengaruh panjang serat terhadap sifat mekanik dan fisik komposit berpenguat serat ijuk dengan matrik Epoxy [ Skripsi ]
No full textBibliografi hal. 65-67Abstrakxx, 64 hal. : il. ; 28 cm. . - - Lamp. (21 lembar
PENGARUH PANJANG SERAT TERHADAP KEKUATAN TARIK KOMPOSIT BERPENGUAT SERAT IJUK DENGAN MATRIK EPOXY
No full textSerat ijuk merupakan serat alami yang diperoleh dari pohon aren (Arenga Pinnata Merr), dan dapat terdegradasi secara alami serta harganya lebih murah disbanding serat sintetis. Tujuan dari penelitian ini untuk mengetahui pengaruh panjang serat terhadap kekuatan tarik komposit berpenguat serat ijuk dengan matrik epoxy. Pada penelitian ini, pengekstrakan serat ijuk menggunakan sisir kawat yang berfungsi memisahkan serat ijuk dari pelepahnya lalu dilakukan pemilihan serat berdiameter 3 mm menggunakan micrometer sekrup.kemudian serat ijuk direndam dalam larutan NaOH 5% selama 2 jam dan dikeringkan selama 15 menit. Serat selanjutnya dipotong dengan panjang 30 mm, 60 mm, dan 90 mm.Lebih lanjut, pembuatan komposit menggunakan metode hand lay up dengan pencampuran resin epoxy dan hardener dengan perbandingan campuran 1:1 mengacu pada ASTM D638. Selanjutnya dilakukan pencampuran matrik dan serat dengan fraksi massa 80% : 20% menggunakan variasi panjang serat. Selanjutnya specimen uji dipanaskan dalam oven dengan suhu70 C selama 10 menit. Kemudian dilakukan pengujian tarik untuk resin epoxy murni dan untuk komposit dengan variasi panjang serat 30 mm, 60 mm, dan 90 mm. Fhoto daerah patahan dengan Scanning Electron Microscope (SEM) digunakan untuk melihat mekanisme perpatahan komposit. Hasil pengujian menunjukkan bahwa kekuatan tarik dan regangan tertinggi dicapai pada komposit dengan panjang serat 90 mm. Kekuatan tarik yang didapat sebesar 36,37 MPa dan regangan sebesar9,34 %. Faktor-faktor yang mempengaruhi kekuatan komposit ialah daya ikat serat dengan matrik, pendistribusian serat yang merata, dan panjang kritis serat. Hasil foto SEM pada patahan komposit serat ijuk menunjukkan terjadinya fiber breaking. Hal ini menunjukan bahwa daya ikat antara matrik dan serat yang cukup baik, tetapi sebaran serat pada matrik tidak merata yang mengakibatkan kekuatan tarik komposit yang optimal tidak bisa dicapai.Keywords : Serat ijuk, kekuatan tarik, SE
Vernacularization analysis towards Cakepan Suci Al-Qur’an Salinan Ring Basa Bali
No full textThe development of interpretation in Indonesia generally used the elements of the locality to make the community easier in understanding messages of Quran. there are many aspects of life like social structure, law, and government systems that are formed by the influence of Islam, as well as several Arabic vocabularies introduced into local languages. The commentator interpreted the Qur'an using the common language is known as localization or vernacularization.
Many languages are used in the interpretation of Quran. For example, Malay, Javanese, and Sundanese. Al-Qur’an with the Balinese translation seems rare to be done than other local languages. Cakepan Suci Al-Qur'an Salinan Ring Basa Bali by H. Ahmad Iwan Darmawan (I Wayan Rupa Mengwi) is a translation of the Qur'an in Balinese. He is the member of Indonesian Ahmadiyya Community. Some dictions used local languages that are different from translations in general, like translating the word "Allah" with "Ida Hiyang Widi", the word "believers" alladzina amanu which means "anake sane matutang" and many more. This research is intended to reveal the reason why the author vernacularize some terms of the Qur’an in Cakepan Suci Al-Qur’an Salinan Ring Basa Bali and explain how does the Vernacularization within it.
This research is Qualitative research by doing library research. So that in the discussion described and analyzed the vernacularization contained in the translation of the Qur'an that uses local languages, Cakepan Suci Al-Qur’an Salinan Ring Basa Bali. Data collection technique uses the documentation and interview to the related informants. The method used in this research is descriptive analysis, namely by collecting and selecting data from all sources, then delivering the result of this reseacrh by describing every kind things relates with the Cakepan Suci Al-Qur’an Salinan Ring Basa Bali.
The result showed that (1) This book was written to commemorate one century of Ahmadiyyah in 1989, which aimed to introduce Islamic teachings to the Balinese as the majority of Hinduism. The use of translation in the verses used terminology that is easily understood by the Balinese people so they will not feel strange by rejecting the teachings of Islam. (2) Vernacularization theory contained in the book Cakepan Suci Al-Qur'an Salinan Ring Basa Bali by using two approaches: retention from loanword (divided into two, conscious and unconscious), and terminologization. This aims Balinese people, who are still unfamiliar, able to understand the meaning of Qur’an. (3) This translation has a great influence on the Balinese. It could be said as the first Balinese translation of the Qur'an by a native Balinese, I Wayan Rupa Mengwi
Legal Basis for Application for Bankruptcy in Indonesia (Decision Study Number 99 / Pailit / 2011 / PN.Niaga Mdn)
No full textThe bankruptcy law was originally intended to protect creditors by providing
clear and certain ways to settle unpaid debts. Circumstances to stop paying debts
can occur because they are unable to pay and do not want to pay. Both causes
certainly cause harm to the creditor concerned. The next steps, especially in
relation to financial matters, can be taken through litigation, namely by
submitting bankruptcy or delaying debt payments through the Commercial Court.
It is expected that the confiscation of the company can be carried out by the public
bankruptcy which then the assets of the company can be used to pay debts from
creditors. In this research, the writer will take the title "THE BASIS OF LAW
APPLICATION FOR Bankruptcy IN INDONESIA" (Decision Study No. 09 /
Bankrupt / 2011 / Pn. Niaga / Medan. The problem in this research is how are the
requirements for bankruptcy application to be accepted by commercial court, and
what are the consequences of the law on bankruptcy decisions granted by the
commercial court based on the decision number 09 / Bankrupt / 2011 / Mr. Niaga
/ Medan? The purpose of this study is to determine the requirements for a
bankruptcy application so that it can be granted by the Commercial Court and to
determine the legal consequences of the bankruptcy decision granted in the
decision number 09 / Bankrupt / 2001 / PN NIAGA / MEDAN The research
method used is the literature study and interview of the Commercial Judge in the
Medan District Court Based on the results of the study the authors concluded that
bankruptcy of a debtor can be filed if it meets the following requirements : Debtor
must have at least more than one creditor (Concursus Creditorium), Debit or not
paying off at least one debt to one of its creditors, the debt that has not been paid
must be past due and can be collected (due and payable) can be proven simply.
The legal consequences of the application for bankruptcy based on the decision
are in case of decision No. 09 / PAILIT / 2011 / PN. NIAGA / MEDAN which is
the object of the study of the author where after conducting research that the
application for bankruptcy was granted by the Medan Commercial Court, the
Commercial Court, the debtor by law loses his right to do something about the
control and management of assets included in the bankruptcy from the date of the
bankruptcy
Translating the Transcends of God\u27s World in the Arabic-Quran into Balinese
No full textThe development of Quranic translation in Indonesia generally showed the total adoption of the fixed theological words and phrases of the Arabic-Qur’an as loanword in the translation work. For some local communities, it does not make them easier in understanding the messages of the Quran through its “untranslated” words and phrases. So, some parties within Muslim communities tried to translate them using the local language. Cakepan Suci Al-Qur\u27an Salinan Ring Basa Bali by I Wayan Rupa Mengwi is one of the Qur’an translation into local languages, it is the first Balinese translation of the Qur’an, which prefer to translate them rather than to borrow them in translation. But it remains questions how the author vernacularized some “fixed theological terms and phrases” of the Arabic-Qur’an into Balinese and why did he chose to “translate” them rather than to “borrow” them in his translation work? The result showed that (1) it used terminological approach to vernacularize some fixed terms and phrases, (2) The special appeal of using Balinese words and phrases when translating selected Qur\u27anic words and phrases is to reflect typical local beliefs (Balinese), as well as to carry out da\u27wah through a socio-cultural approach. Even though, this pattern reflects the platform and strategy of international Ahmadiyya movement through the translation of the Qur\u27an, but this work is not connected formally under the organization program of Ahmadiyya
THE LANGUAGE STYLE IN RENDY PANDUGO’S “THE JOURNEY” ALBUM
No full textSong lyric is created to express a person feeling either happy or sad. Every song lyric uses language style. Language style is the way the author uses their feeling to make the lyrics more meaningful. One of singer outright song in Indonesia is Rendy Pandugo. Rendy Pandugo is a new singer and a new songwriter. In his album entitled "The Journey", he uses English language to complete all the lyrics. This research aims to 1) Describe language style that is in the lyrics in album "The Journey"; 2) Explain the meaning of language style that exists in those lyrics. The songs that are used in this research are Float In The Sky, Silver Rain, Won’t Let Me Down, I Know The Answer, By My Side, I Don’t Care and Snap. The researcher uses theory from Tarigan. The analytical technique in this research is descriptive qualitative method. After analyzing the data, the researcher finds 82 data and 2 types of language style. The types of language style that are found are comparison language style and repetition language style. The comparison language styles of this research are antithesis (2), hyperbole (10), metaphor (4), personification (4), simile (4) and tautology (2). The repetition language styles of this research are anaphora (6), alliteration (7), assonance (31), epistrofa (2), epizeukis (8), simploke (1) and tautotes (1)
Out-of-Plane Piezoelectricity and Ferroelectricity in Layered alpha-In2Se3 Nanoflakes
No full textPiezoelectric and ferroelectric properties in the two-dimensional (2D) limit are highly desired for nanoelectronic, electromechanical, and optoelectronic applications. Here we report the first experimental evidence of out-of-plane piezoelectricity and ferroelectricity in van der Waals layered alpha-In2Se3 nanoflakes. The noncentrosymmetric R3m symmetry of the alpha-In2Se3 samples is confirmed by scanning transmission electron microscopy, second-harmonic generation, and Raman spectroscopy measurements. Domains with opposite polarizations are visualized by piezo-response force microscopy. Single-point poling experiments suggest that the polarization is potentially switchable for alpha-In2Se3 nanoflakes with thicknesses down to similar to 10 nm. The piezotronic effect is demonstrated in two-terminal devices, where the Schottky barrier can be modulated by the strain-induced piezopotential. Our work on polar alpha-In2Se3, one of the model 2D piezoelectrics and ferroelectrics with simple crystal structures, shows its great potential in electronic and photonic applications.Welch Foundation Grant [F-1814]; NSF EFRI [EFMA-1542747]; Welch Grant [F-1038]; National Basic Research Program of China [2014CB932500]; National Natural Science Foundation of China [21525310]SCI(E)ARTICLE95508-55131
Investigation of the effects of renewable diesel fuels on engine performance, combustion, and emissions
No full textA study was undertaken to investigate renewable fuels in a compression-ignition internal combustion engine. The focus of this study was the effect of newly developed renewable fuels on engine performance, combustion, and emissions. Eight fuels were investigated, and they include diesel, jet fuel, a traditional biodiesel (fatty acid methyl ester: FAME), and five next generation biofuels. These five fuels were derived using a two-step process: hydrolysis of the oil into fatty acids (if necessary) and then a thermo-catalytic process to remove the oxygen via a decarboxylation reaction. The fuels included a fed batch deoxygenation of canola derived fatty acids (DCFA), a fed batch deoxygenation of canola derived fatty acids with varying amounts of H2 used during the deoxygenation process (DCFAH), a continuous deoxygenation of canola derived fatty acids (CDCFA), fed batch deoxygenation of lauric acid (DLA), and a third reaction to isomerize the products of the deoxygenated canola derived fatty acid alkanes (IPCF). Diesel, jet fuel, and biodiesel (FAME) have been used as benchmarks for comparing with the newer renewable fuels. The results of the experiments show slightly lower mechanical efficiency but better brake specific fuel consumption for the new renewable fuels. Results from combustion show shorter ignition delays for most of the renewable (deoxygenated) fuels with the exception of fed batch deoxygenation of lauric acid. Combustion results also show lower peak in-cylinder pressures, reduced rate of increase in cylinder pressure, and lower heat release rates for the renewable fuels. Emission results show an increase in hydrocarbon emissions for renewable deoxygenated fuels, but a general decrease in all other emissions including NOx, greenhouse gases, and soot. Results also demonstrate that isomers of the alkanes resulting from the deoxygenation of the canola derived fatty acids could be a potential replacement to conventional fossil diesel and biodiesel based on the experiments in this work.This material is based on work partly supported by the National Science Foundation EFRI program under Grant EFRI-093772. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the funding agencies. The authors would also like to thank Dr. Robert Natelson of the Department of Mechanical and Aerospace Engineering at NCSU for his help and suggestions
Stark tuning and electrical charge state control of single divacancies in silicon carbide
No full textNeutrally charged divacancies in silicon carbide (SiC) are paramagnetic color centers whose long coherence times and near-telecom operating wavelengths make them promising for scalable quantum communication technologies compatible with existing fiber optic networks. However, local strain inhomogeneity can randomly perturb their optical transition frequencies, which degrades the indistinguishability of photons emitted from separate defects and hinders their coupling to optical cavities. Here, we show that electric fields can be used to tune the optical transition frequencies of single neutral divacancy defects in 4H-SiC over a range of several GHz via the DC Stark effect. The same technique can also control the charge state of the defect on microsecond timescales, which we use to stabilize unstable or non-neutral divacancies into their neutral charge state. Using fluorescence-based charge state detection, we show that both 975 nm and 1130 nm excitation can prepare their neutral charge state with near unity efficiency. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons. org/licenses/by/4.0/).Funding Agencies|ARL OSD QSEP program; NSF EFRI [1641099]; AFOSR MURI program; JSPS KAKENHI(A) [17H01056]; Swedish Research Council [2016-04068]; Carl-Trygger Stiftelse for Vetenskaplig Forskning [CTS 15:339]; Swedish Energy Agency [43611-1]</p
Effects of oxygen on light activation in covalent adaptable network polymers
No full textLight activated polymers are a novel group of active materials that deform when irradiated with light at specific wavelengths. This paper focuses on the understanding and evaluation of light activated covalent adaptable networks formed by radical polymerization reactions, which have potential applications as novel actuators, surface patterning, and light-induced bending and folding. In these polymer networks, free radicals are generated upon light irradiation and lead to evolution of the polymer network structure through bond exchange reactions. It is well known that oxygen is an important inhibitor in radical-based chemistry as oxygen reacts with free radicals and renders them as inactive species towards further propagation and reaction. However, it is unclear how radical depletion by oxygen may affect the light-induced actuation. This paper studies the effects of oxygen on both stress relaxation and bending actuation. Light induced stress relaxation experiments are conducted in an environmental chamber where the concentration of oxygen is controlled by the nitrogen flow. A constitutive model that considers oxygen diffusion, radical termination due to oxygen, and the polymer network evolution is developed and used to study the stress relaxation and bending, and the model predictions agree well with experiments. Parametric studies are conducted to identify the situations where the effects of oxygen are negligible and other conditions where they must be considered.US National Science Foundation [EFRI-1435452]; National Natural Science Foundation of China [11090330, 11090331, 11072003, 11202006]; National Basic Research Program of China [G2010CB832701]SCI(E)[email protected]; [email protected]; [email protected]
