bluuebunny/crossref_metadata_2025_split huggingface dataset:
PRESIPITASI LOGAM BERAT LIMBAH CAIR LABORATORIUM MENGGUNAKAN NATRIUM SULFIDA DARI BELERANG ALAM
Authors: Anami Wisni Rona , Maslahat Mamay , Arrisujaya Dian 
Published: September 2020

Precipitation of Laboratory Wastewater Heavy Metals by Natural Sulphur Sodium Sulfide Sodium sulfide (Na2S) from natural sulfur has been used for heavy metal precipitation from laboratory wastewater. Heavy metals in laboratory wastewater include mercury (Hg), lead (Pb), chromium (Cr) and zinc (Zn). Initial laboratory wastewater testing was performed by measuring the initial pH and the concentration of heavy metals in the wastewater prior to precipitation using the atomic absorption spectrophotometer. Sulphide precipitation phase consists of variations in the concentration of NaOH, time, temperature, and volume of dissolving Na2S. Parameters for the efficiency of Hg, Pb, Zn and Cr heavy metal precipitation were the initial pH, concentration and rate of stirring of the solution. Results showed that the optimum precipitation efficiency for Zn is achieved by using 10 % Na2S solution with an efficiency of 97.93 %. The most significant reduction in Cr and Hg was the use of 20 % Na2S solution with a precipitation efficiency of 99.24 % and 99.76 % respectively. The optimal efficiency for Pb with a 30 % Na2S solution was 99.68 %. Natural sulfur can reduce the levels of heavy metals in laboratory wastewater by precipitation.Key words: Natural sulfur, Heavy metals, Precipitation, Sodium sulfide, ABSTRAKPresipitasi logam berat dari limbah cair laboratorium telah dilakukan dengan menggunakan natrium sulfida (Na2S) dari belerang alam. Logam berat yang terkandung dalam limbah cair laboratorium diantaranya adalah merkuri (Hg), timbal (Pb), kromium (Cr) dan seng (Zn). Pengujian awal limbah laboratorium dilakukan dengan mengukur pH awal dan kadar logam berat yang terdapat dalam limbah sebelum presipitasi menggunakan pH meter dan spektrofotometer serapan atom. Tahapan presipitasi limbah oleh sulfida meliputi pembuatan variasi konsentrasi NaOH, waktu, suhu, dan volume pelarutan Na2S. Parameter efisiensi presipitasi logam Hg, Pb, Zn, dan Cr meliputi pH, Konsentrasi dan Kecepatan pengadukan. Hasil penelitian menunjukkan efisiensi pengendapan optimal untuk logam Zn terdapat pada penggunaan larutan Na2S 10% dengan efisiensi 97,93%. Larutan Na2S 20% paling banyak menurunkan logam Cr dan Hg dengan efisiensi masing-masing sebesar 99,24% dan99,76%. Efisiensi optimal untuk logam Pb berada pada penggunaan larutan Na2S 30% dengan efisiensi 99,68%. Belerang alam mampu menurunkan kadar logam berat dalam limbah cair laboratorium dengan metode presipitasi.Kata kunci: Belerang alam, Logam berat, Presipitasi, Natrium sulfida
Rancang Bangun Alat Pembersih Pasir Silika Sebagai Penyaring Air Di PT. Tirta Fresindo Jaya
Authors: Nur Rusdi , Razak Arthur H. , Putra A.Ari , Maulana Irsat , Ahmad Miftahul 
Published: September 2020

Penelitian ini bertujuan untuk mengurangi waktu proses pembersihan pasir silika dari 4 hari pengerjaaan menjadi 2 hari. Tahap-tahap dalam merancang alat pembersih ini yang pertama adalah pengamatan dari proses pembersihan manual dan ditemukan kekurangan dari pengerjaan tersebut. Kemudian perancangan alat pembersih yang lebih baik dari yang sudah ada. Tahap selanjutnya adalah perencanaan, perhitungan dan penggambaran untuk menentukan komponen-komponen yang digunakan. Tahap terakhir adalahÂ produksi, pangecetan dan perakitan. Dari hasil perencanaan dan perhitungan menunjukkan bahwa alat pembersih pasir silika ini mampu membersihkan 30 Kg/4,25 menit atau 425Kg/Jam. Biaya keseluruhan yang dibutuhkan untuk membuat alat ini per unit sebesar Rp. 4.653.371,-.
Analisis Kestabilan Transien dan Mekanisme Pelepasan Beban Pada Jaringan Listrik Wilayah Sulselbar Setelah Penambahan PLTU Punagaya
Authors: Marhatang Marhatang , Saini Makmur , Fauzan Muhammad Ikram , Erniwati Erniwati 
Published: September 2020

Kebutuhan listrik semakin hari semakin meningkat baik itu pada sektor perumahan maupun sektor perindustrian. Seiring dengan pertumbuhan beban maka penambahan pembangkit juga diperlukan. Pada jaringan listrik wilayah Sulselrabar, telah diadakan penambahan sejumlah pembangkit dan salahsatunya adalah PLTU Punagaya Jeneponto yang berkapasitas 2x100 MW. Penambahan pembangkit ini menyebabkan kestabilan pada sistem bisa berubah, sehingga dibutuhkan studi kestabilan transien untuk mengetahui kestabilan sistem pada jaringan Sulselrabar saat terjadi gangguan.Pengambilan data berupa spesifikasi generator, transformator, jaringan transmisi dan beban yang ada pada Unit Pengaturan Beban PT. PLN Wilayah Sulselrabar. Pada penelitian ini dilakukan simulasi kestabilan transien menggunakan software ETAP 12.6Â dengan memberikan gangguanÂ pada sistem berupa generator lepas dan hubung singkat. Selanjutnya jika sistem mengalami ketidakstabilan akan dilakukan mekanisme pelepasan beban. Berdasarkan hasil simulasi, menunjukkan bahwa pada kasus lepasnya generator unit 2 Barru, sistem masih dapat mempertahankan kestabilannya. Namun pada kasus lepasnya PLTU BE, rata-rata penurunan tegangan mencapai 9,34% dan menyebabkan karakteristik sistem sudah tidak dapat berada pada range yang diizinkan sehingga dibutuhkan pelepasan beban sebesar 56,213 MVA. Pada kasus hubung singkat, sistem masih dapat mempertahankan kestabilannya meskipun rata-rata penurunan tegangan sesaat pada saat terjadi gangguan mencapai 68,97%.Â
Efek Pemakaian Economizer Terhadap Peningkatan Efisiensi Boiler Pulverized Pada Unit Pembangkit Listrik Tenaga Uap
Authors: Suhardi Suhardi , Kamriani Kamriani , Suryanto Suryanto , Jamal Jamal 
Published: September 2020

Kehilangan panas pada pembangkit listrik tenaga uap (PLTU) merupakan salah satu faktor penting yang sangat perlu diperhatikan dalam pengoperasian boiler. Penelitian ini bertujuanÂ menganalisis efisiensi boiler pulverized dengan memakai economizer dan membandingkan jika tidak memakai economizer pada suatu boiler jenis Pulverized PLTU. Â Dalam melakukan penelitian ini metode yang digunakan adalah metode dengan menggunakan data hasil survey pada pembangkit listrik tenaga uap (PLTU) Jeneponto dan dilanjutkan dengan analisis yang membandingkan penggunaan economizer dan tanpa menggunakan economizer. Hasil analisis diperoleh efesiensi boiler dengan menggunakan economizer sebesar rata-rata 90% dan tanpa menggunakan economizer rata-rata 80%. Dengan demikian penggunaan economizer dapat meningkatkan efesiensi sekitar 12% atau yang setara dengan 2976,8 kg/jam.
Internalisasi Multikulturalisme dalam Berbangsa pada Lembaga Pendidikan Pondok Pesantren (Studi pada Pondok Pesantren se-Kota Metro)
Authors: Sutarjo J 
Published: September 2020

Conflicts related to multicultural are widely reported in mass media and electronics in various forms such as demonstrations and other blasphemies related to differences in Indonesia. This shows that many people still do not understand multiculturalism. If it is realized that it does not need to happen because the diversity that exists should be understood because in essentially multicultural have a purpose to understand each other and compete in goodness with ” taqwa” to Allah SWT.
In multicultural studies multiculturalism is seen as Politic of Recognition; building awareness of cultural diversity, traditions or preserved habits. Recognition and acceptance of the condition is a politic of recognition that must be upheld. This includes; 1) Multicultural in Etnic and Cultural Groups. 2) Society in Metaphors of Mixed Culture. 3) Multiculturalism in Social Characteristics. 4) Hyperculturalism as a new view.
From the study conducted in “pesantren cottage” in Metro city, multicultural multiculturalization has been done although has not been integrated into the curriculum of boarding school education officially.
Evaluasi Pembelajaran dan Penilaian Autentik dalam Pembelajaran Bahasa Arab
Authors: Indriana Dina 
Published: September 2020

Dalam pembelajaran dibutuhkan adanya evaluasi agar guru dapat mengetahui apakah tujuan pembelajaran itu tercapai atau tidak. Evaluasi adalah salah satu alat untuk mengetahui hasil pembelajaran. Evaluasi model CIPP yang akan peneliti gunakan dalam melihat sejauh mana pendekatan saintifik dan penilaian autentik dilaksanakan oleh guru bahasa Arab.
Evaluasi model CIPP digunakan karena ecaluasi model ini lebih komprehensfi. Evaluasi merupakan kegiatan yang terencana dan sistematik, karena mempunyai tujuan, untuk mengetahui hasil evaluasi yang baik maka dibutuhkan ontiunitas evaluasi, obyektifitas evaluasi, komprehensif evaluasi, dan praktikabilitas evaluasi.
Model CIPP dikembankan oleh Daniel L. Stufflebeam, dkk. Stuflebeam mengembangkan evaluasi pembelajaran model CIPP. Teori ini dikembangkan pada tahun 1971 dengan berlandaskan pada empat dimensi yaitu dimensi context, dimensi input, dimensi proses, dan dimensi produc.
Strategi pembelajaran saintifik dan penilaian autentik merupakan bagian dari strategi pembelajaran dan penilaian yang menjadi prioritas dalam implementasi strategi pembelajaran dan jenis penilaian yang diusung oleh penerapan kurikulum 2013 sebagai kurikulum perubahan dari kurikulum KTSP.
Evaluasi input strategi pembelajaran saintifik dan penilaian autentik dalam pembelajaran Bahasa Arab dari hasil pre-tes menunjukkan pemahaman awal bagi para guru Bahasa Arab di MTs Kota Serang sangat rendah dengan rata-rata 49,25. Analisis RPP yang disusun pada kegiatan Inti masih menunjukkan ada kesalahan dan kelemahan pengetahuan dalam menyusun kegiatan pembelajaran untuk disesuaikan dengan tahapan-tahapan pembelajaran dengan tahapan 5 M.
Call-level Analysis of Hybrid WDM-OCDMA Passive Optical Networks with Finite Traffic Sources
Authors: J.S. Vardakas , V.G. Vassilakis , M.D. Logothetis 
Published: September 2020

Passive Optical Networks (PONs) are becoming a mature concept for the provision of enormous bandwidth to end-users with low cost. In this paper we study the call-level performance of two PON configurations: the OCDMA-PON and the Hybrid WDM-OCDMA PON. We propose analytical models for calculating connection failure probabilities (due to unavailability of a wavelength) and call blocking probabilities (due to the total interference on a call that may exceed a permissible threshold) in the upstream direction. The PONs are described/modeled by onedimensional Markov chains. Bysolving them, we derive recurrent formulas for the blocking probabilities. The proposed analytical models are validated through simulation; their accuracy was found to be absolutely satisfactory.
Proposal of A Dynamic Channel Allocation Method for MIMO-OFDMA System
Authors: Khuong Nguyen Quoc , Duc Nguyen Van , Trung Nguyen Quoc , Hung Dao Minh 
Published: September 2020

This paper proposed a dynamic channel allocation method for MIMO-OFDMA system, which can be applied for both uplink and downlink. The SNR on each subcarrier linking from a BS to all active MSs is estimated by ZF and MMSE approach. Only subcarriers having maximum SNR are selected for the corresponding communicationlink. The proposed algorithm is investigated for different system parameters and the channel conditions. Numerical results show that the system performance can be significantly improved by applying the proposed technique.
The Business Family as the Business Model of Our Time
Authors: Hoopes James 
Published: September 2020

<p>The information technology has reduced the cost of business transactions large managerial corporations are giving way to small family business firms. It is good change because family businesses could not only aim to sustain the family economically but also could aim nurturing children. The role of ethics in family business is has not been studied systematically. This paper has argued that family firms are more socially responsible that non-family firms because family firms are breeding ground for core family values. This paper also argues that business literature should lay emphasis on virtues and character based business in place of value and culture based business. To manage for organizational virtue and character is to treat ethics as an end in itself. To manage by values and characters is to treat ethics as means for some ulterior motive. If employees are told that they should be honest because it pays then profit may trump in case of a conflict. The combination of family virtues and business can make the family busines as moral model or moral leadership for all types of business in this era of high demands for accountability.</p>
Critical Investigation of the Combined Compliance Average and Spreading Measures in the Robust Topology Optimization with Uncertain Loading Magnitude and Direction
Authors: Csébfalvi Anikó 
Published: September 2020

The paper critically investigates the role of the combined compliance average and spreading measures in the volume-constrained continuous robust topology optimization with uncertain loading magnitude and direction. In the robust topology optimization the generally expected and most popular robustness measure is the expected compliance, In the expectancy oriented approach, the compliance increment which is needed to get the robust design is an implicitly defined response variable. In order to open the possibility of the creative contribution of the designer to the best robust design searching process, this measure is sometimes combined with a spreading-oriented measure, which may be the variance or standard deviation. The best weighting schema can be done by a try-and-error-like algorithm in which the weights are design variables and the compliance-increment remains an implicitly defined response variable. In this paper, it will be shown that all of the compliance oriented approaches which are based on a single or combined statistical measure can be replaced by a new compliance-function-shape-oriented robust approach in which the allowed-compliance-increment will be an explicitly defined design variable and for a given increment value the robust solution will be the theoretically best one. A popular volume-constrained symmetric bridge problem with uncertain loading magnitude and direction will be presented to demonstrate the viability and efficiency of the proposed robust approach.
Transformation of the Political System of Saudi Arabia: Regional Dimension
Authors: Abdullah Hazaa Othman  , Oleg Evgenievich Grishin  , M. Yoserizal Saragih  
Published: September 2020

The Kingdom of Saudi Arabia is considered one of the pivotal countries in the region and the international community due to its political and economic weight. The importance of this role comes with the Saudi weight in the Arab Gulf and the importance of the Gulf for the Kingdom’s security in general, as well as being at the forefront of the countries bordering the Gulf in terms of the volume of output and oil reserves. Since the year 2010, changes in the regional environment of the Kingdom of Saudi Arabia have pushed towards reconsidering some of the problems and challenges to which its policy was exposed, and it has moved towards searching for what it deems best to enhance its security and stability in the region. However, this role is faced with internal, economic, political, social, regional and international challenges, The need to adapt in the formation of its positions on regional issues, in line with the changes that occurred in the structure of the Arab regional system and the decline in the position of some regional actors, which led to the multiplicity of Saudi regional proposals to formulate its strategic directions to confront the state of imbalance in the region, in addition to that. Its keenness to fulfill its obligations towards its regional allies, as is the case in Yemen, Saudi Arabia has benefited from being an effective regional state, but its effectiveness must be negatively affected by what is happening on or around its territory. And that future expectations do not serve this role much.
PELATIHAN PENULISAN ARAB PEGON DAN KALIGRAFI PADA SISWA SEKOLAH MENENGAH ATAS (SMA/MA/SMK) SE-KOTA METRO
Authors: Setiawan Agus , Amalia Dian Risky , Zaini Muhammad , Dea Leli Fertiliana , Mukhlisin Ahmad , Aisyah Nurul 
Published: September 2020

Preserving the culture of the archipelago's Islamic treasures is something that must be done One of the Islamic treasures that needs to be preserved is Penegusan Arabic Calligraphy. To this, community service activities wre carried out to provide training on all Metro City. The method used in mentoring to the community is Appeciative inquiry. The steps were iscovery, dream, design, define and destiny. This service used the Assed-Based Community Development (ABCD) approach. ABCD was ne of the discussions used in community service prioritizing existing assets and potential in the community compared to High School students. The community service activity was carried out in 3 sessions, namely introducing and returning Arabic pegon, training to get calligraphy by the speaker and fixing it with independent calligraphy. The results of this dedication show that tudents who were ble to write Arabic pegon that simultaneously could make alligraphy based on Arabic pegon
Kesalahan Penggunaan Kata Ganti Demonstratif Ko-So-A pada Kalimat Bahasa Jepang dalam Ujian Akhir Semester Penerjemahan Lisan
Authors: Winingsih Irma 
Published: September 2020

AbstractBunmyakushiji type of â€˜Ko-So-Aâ€™ demontrative pronouns are words that are being used to replace word(s) or to refer word(s) or thing(s) which have said before. The Ko-So-A demonstrative pronouns have difference usage with pronoun in Indonesian language. Writer found out there are many Japanese learners in Japanese Language Department of Dian Nuswantoro University including were having difficulties to distinguish functions of each pronoun. Because of that, writer is interested in analyzing the errors made by learner when using bunmyakushiji type of demonstrative pronoun. Writer use qualitative method and analytic descriptive. The data were collected from conversations ofÂ Interpreting classâ€™s Final Exam. The result was error usage of So and A demonstrative pronouns often happened than error usage of Ko and So demonstrative pronouns. Â Keywords: kosoa, error, demonstrative, understanding.Â AbstrakKata ganti demonstratif Ko-So-A yang berfungsi kontekstual digunakan untukmerujuk atau menggantikan kata yang dituturkan sebelumnya. Penggunaannyaberbeda dengan kata ganti demonstrative dalam bahasa Indonesia.Karena dalamUjian Akhir Semester mata kuliah Penerjemahan Lisan yang merupakan percakapan antara penguji dengan mahasiswa cukup banyak ditemukan kesalahan penggunaan kata ganti ini, maka penulis tertarik untuk meneliti kesalahan tersebut.Metode yang digunakan adalah metode kualitatif dengan analisis deskriptif. Data diperoleh dari percakapan/tanya jawab dalam ujian. Hasilnya yaitu kesalahan penggunaan kata ganti demonstrative So dan A lebih banyak ditemukan dibandingkan kesalahan penggunaan kata ganti demonstratif Ko dan So. Kata Kunci: ko-so-a, kesalahan, demonstratif, pemahaman
Analisis Sosiolinguistik Politeness Bahasa Jepang dalam Film Galileo 2013 Karya Keigo Higashino
Authors: Fadhillah Yuniati 
Published: September 2020

ABSTRACTThis research discusses the various languages of respect (keigo), namely sonkeigo, kenjougo, and teineigo. This study aims to examine the use of keigo language and the factors that influence the use of keigo, especially in the work environment. The theory used in this study is based on Sachiko's sociolinguistic theory of distance. The data used is a Japanese film entitled Galileo 2013 by Keigo Higashino. The research method of this study show uses descriptive qualitative method. The results of this study show that the use of respectful language keigo (kenjougo and teineigo) is used between participants in the scope of uchi mono. Whereas the use of the various keigo languages (sonkeigo) is used by speakers of speech partners in the scope of soto mono, formal or informal situations, age or higher position. Factors that influence the use of keigo according to Sachiko's Idea theory are the factors that take into consideration of the use of keigo in the uchi mono group is social distance, because the speaker speaks to the speech partner, based on position or age position. Whereas the dominant factor that becomes a consideration for the use of keigo in the soto mono group is social distance and formality distance, because the speech partners who speak with many speakers do not use a variety of respectful languages (keigo), because the speech partners feel they are older than the speakers, and consider not formal talks because it's not from his job.Keywords: Keigo, social factors, distance, uchi mono, soto mono.
Applying rasch model: adversity quotient analysis of students in mathematics
Authors: Alyani Fitri , Zahra Raihana 
Published: September 2020

Penelitian ini bertujuan untuk menganalisis Adversity Quotient siswa dalam pelajaran matematika menggunakan Rasch Model. Populasi dari penelitian ini adalah beberapa siswa SMA Negeri Jakarta, dengan sampel sebanyak 98 siswa kelas 11 salah satu SMA Negeri Jakarta tahun ajaran 2019/2020. Penelitian ini merupakan penelitian deskriptif kuantitatif. Dengan instrumen non-test berupa angket Adversity Quotient yang terdiri dari 39 pernyataan dengan jawaban yang menggunakan skala likert dengan 5 pilihan jawaban dalam bentuk “sangat tidak setuju”, “tidak setuju”, “netral”, “setuju”, “sangat setuju”. Pembagian kategori Adversity Quotient berdasarkan tipe climbers, campers, dan quitters. Hasil dari penelitian ini bahwa tipe climbers adalah tipe yang paling dominan yang dimiliki siswa berdasarkan hasil penelitiannya.
Investigation of the Relationship Between the Pulp Area and Chronological Age in Patients that Received and Not Received Orthodontic Treatment
Authors: UĞUR AYDIN Zeliha , DOĞAN Tülin , GÖLLER BULUT Duygu , KORKMAZ Yasemin Nur 
Published: September 2020

Objective: The aim of
this study was to evaluate the relationship between chronological ages and pulp
areas of mandibular canine teeth of patients who underwent orthodontic
treatment and patients who never received orthodontic treatment.

Methods: 102 patients that completed fixed
orthodontic treatment and between the ages of 13-24 and 102 age and sex-matched
control group was included in the study. A total of 204 dental panoramic
radiographs taken with the same procedures and with the same device (Soredex;
Cranex Novus, Tuusula, Finland) were evaluated. The pulp areas of the
mandibular canine teeth were measured using the Image J software (US National
Institutes of Health, Bethesda, MD). Data were analyzed with Independent t-test
and Pearson’s rank correlation test.

Results: In both the orthodontic group (r =
-0,511) and in the control group (r = -0,592), there was a negative correlation
between chronological age and pulp area. There was no significant difference
between the groups with respect to the pulp area and gender (p&gt; 0.05).

Conclusions: Orthodontic
treatment did not result in a significant difference in the correlation between
the pulp area and the chronological age.
ASURANSI SYARIAH DI INDONESIA HUKUM PROSPEK DAN TANTANGAN
Authors: Suparmin Asyari 
Published: September 2020

Kehadiran asuransi syariah di Indonesia melengkapi hadirnya bank syariah yang lebih dulu di resmikan oleh Presiden Suharto yakni bank Muamalat Indonesia. Keberadaan asuransi syariah sangat penting karena keberadaaa dan dan asuransi saling melengkapi dan membutuhkan. Sementara ummmat membutuhkan kepastian halal inilah yang mendasari mengapa asuransi syariah di pelukan. Apa hokum asuransi, bagaimana perbedaan dengan produk konvensional, bagaimana prspek di Indonesia serta apa tantangan yang di hadapi. Beberapa hal ini yang akan di bahas dalam tulisan ini
Methode diskriptif kwalitatif di pilih untuk menggambarkan kondisi asuransi syariah di Indonesia. Pembahasan sangat di dipengruhi oleh pengalaman lapangan lebih drai dua puluh tahun.
Berbagai dukungan sangat di perlukan demi pengembangan asuransi syariah d Indonesia, Sinergi antara Ulama, Umara pemerintah dalam bentuk regulasi serta dunia kampus sebagai kancah pendidikan.