State University of Semarang

About: State University of Semarang is a education organization based out in Semarang, Indonesia. It is known for research contribution in the topics: Population & Curriculum. The organization has 7737 authors who have published 7790 publications receiving 38055 citations. The organization is also known as: Universitas Negeri Semarang.

Adsorption of Crystal Violet Dye Using Zeolite A Synthesized From Coal Fly Ash

Abstract: Adsorption of Crystal Violet (CV) dye using zeolite A synthesized from coal fly ash (ZA) has been done. Effect of pH, contact time, and the initial concentration of dye adsorption was studied in this adsorption. Model experimental of adsorption isotherms and adsorption kinetics were also studied. The adsorption is done in a batch reactor at room temperature. A total of 0.01 g of zeolite A was added to the Erlenmeyer flask 50 mL containing 20 mL of the dye solution of Crystal Violet in a variety of conditions of pH, contact time and initial concentration. Furthermore, Erlenmeyer flask and its contents were shaken using an orbital shaker at a speed of 200 rpm. After a specified period of adsorption, the solution was centrifuged for 2 minutes so that the solids separated from the solution. The concentration of the dye after adsorption determined using Genesis-20 Spectrophotometer. The results showed that the Zeolite A synthesized from coal fly ash could be used as an effective adsorbent for Crystal Violet dye. The optimum adsorption occurs at pH 6, and contact time 45 minutes. At the initial concentration of 2 to 6 mg/L, adsorption is reduced from 79 to 62.8%. Crystal Violet dye adsorption in zeolite A fulfilled kinetic model of pseudo-order 2 and model of Freundlich adsorption isotherm.

Analisis Kemampuan Literasi Matematika dan Karakter Rasa Ingin Tahu Siswa pada Pembelajaran Berbasis Proyek Berbantuan Schoology

Abstract: Literasi matematika merupakan kemampuan untuk memformulasikan, menerapkan dan menginterpretasikan matematika ke dalam berbagai konteks, meliputi kemampuan untuk bernalar secara matematis dan menggunakan konsep, prosedur, dan fakta untuk mendeskripsikan, menjelaskan, atau memprediksikan suatu fenomena. Penelitian ini bertujuan untuk: (1) mengetahui kriteria kualitas pembelajaran PjBL berbantuan Schoology, dan (2) mendeskripsikan kemampuan literasi matematika dan karakter rasa ingin tahu epistemik siswa kelas XI IPA SMA Karangturi Semarang pada pembelajaran PjBL berbantuan Schoology pada materi turunan fungsi. Penelitian ini menggunakan jenis penelitian mixed method dengan concurrent embedded design. Subjek penelitiannya adalah siswa kelas XI IPA SMA Karangturi Semarang. Hasil penelitian menunjukkan bahwa kemampuan literasi matematika siswa pada pembelajaran berbasis proyek berbantuan Schoology berkualitas baik. Kemampuan – kemampuan yang memperoleh pengaruh dari peningkatan karakter rasa ingin tahu peistemik tersebut diantaranya adalah communicating, mathematizing, representation, reasoning, using symbolic formal and technical operation dan using mathematics tools. Mathematics Literacy is the ability to formulate, apply and interpret mathematics in various contexts, including the ability to do mathematical reasoning and use concepts, procedures, and facts to describe, explain or predict phenomena of events. This study aims to (1) get the information of the learning quality of PjBL with Schoology, and (2) to describe the ability of mathematical literacy and the students epistemic curiosity of grade XI in SMA Karangturi Semarang on PjBL with Schoology on the derivative. This research uses mixed method research with concurrent embedded design. The results showed that students' mathematical literacy skills on project based learning with Schoology get the good quality. The capabilities such influenced by the gaining of epistemic curiosity include communicating, mathematizing, representation, reasoning, using formal symbolic and technical operations and using mathematics tools.

Factors to Predict the Financial Distress Condition of the Banking Listed in The Indonesia Stock Exchange

Abstract: Penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh dari variabel yang diteliti dalam memprediksi probabilitas terjadinya financial distress sektor perbankan di Indonesia. Variabel dalam penelitian ini dipilih dengan pendekatan 5C, yang kemudian diproxykan menjadi GCG (Good Corporate Governance), ROA (Return on Asset), LDR (Loan Deposit Ratio),CAR (Capital Adequacy Ratio), TAG (Total Asset Growth), NPL (Non Performing Loans), PER (Price Eearning Ratio), PBV (Price Book Value Ratio). Populasi dari penelitian ini adalah bank yang terdaftar di Bursa Efek Indonesia periode tahun 2012-2014. Pengambilan sampel dilakukan dengan menggunakan teknik purposive sampling, hingga diperoleh 25 peristiwa financial distress pada periode penelitian. Penelitian ini menggunakan analisis regresi logistik untuk menguji pengaruh variabel independen terhadap variabel dependen. Hasil penelitian menunjukkan variabel return on asset dan capital adequacy ratio berpengaruh negatif terhadap probabilitas financial distress, sedangkan good corporate governance, loan deposit ratio, total asset growth, non performing loans, price earning ratio, dan price book value ratio tidak berpengaruh secara signifikan terhadap probabilitas financial distress. This research aims to analyze the effect of the variabels to predict Indonesian Banks’s financial distress. Those variabel was chosen by using 5C methods. The 5C methods consist of GCG (Good Corporate Governance), ROA (Return on Asset), LDR (Loan Deposit Ratio),CAR (Capital Adequacy Ratio), TAG (Total Asset Growth), NPL (Non Performing Loans), PER (Price Eearning Ratio), PBV (Price Book Value Ratio). The population of this study was all banks listed in Indonesia Stock Exchange (ISX) in 2012-2014. Sampling is done by using purposive sampling method, until founded that was 25 financial distress phenomena that happens in that periods.This study used logistic regression analysis for testing the influence of independent variables on dependent variable. The results of this study showed return on asset and capital adequacy ratio negative significantly influence to the probability of financial distress, meanwhile good corporate governance, loan deposit ratio, total asset growth, non performing loans, price earning ratio, and price book value ratio had no significantly influence to to the probability of financial distress. Keyword: Financial distress, 5C methods, Financial ratio, bank.

Online Web-Based Learning and Assessment Tool in Vocational High School for Physics

Abstract: ICT has transformed the conventional learning system into a modern learning system, demanding innovation in the delivery of learning. So that this study has the aim of developing, knowing the feasibility of online web-based learning and assessment tool in physics, as well as knowing students' learning results in the ICT media. This study research & development (R&D) method using Borg & Gall model. Which refers to the potential problem through data collection, product design, design validation, revision of product design, product testing, revision of usage. The feasibility testing of media and material was carried out by two material expert validators and two media expert validators with a small group trial conducted on students consisting of 13 respondents and large group trial conducted on students consisting of 40 respondents. We use online media for web-based learning and assessment tool in vocational high school for Physics subject, and the results of the study show that this application generates individual assignments, marks student responses, supplies students with the rapid feedback, and records student activities. The student activity log provides insight into student learning habits. Its a reference for assessment. This application meets the requirements as a learning media. The results of the validation by an expert material on online web-based learning and assessment tool gets a percentage of an average score of 82%, and the material gets a percentage of 81.33% criteria very feasible.

Pembelajaran Berbasis Proyek Untuk Meningkatkan Pemahaman Mahasiswa atas Permasalahan Statistika pada Perkuliahan Studi Kasus dan Seminar

Abstract: Perkuliahan studi kasus dan seminar diselenggarakan Jurusan Matematika FMIPA UNNES pada setiap semester genap. Perkuliahan diikuti oleh mahasiswa semester 4 atau lebih yang telah lulus dari mata kuliah statistika elementer, statistika inferensial, dan statistika non-parametrik. Bebekal kemampuan prasyarat dan teori yang lengkap, maka sungguh tepat jika kemudian mahasiswa melaksanakan perkuliahan studi kasus dengan kegiatan empirik. Kegiatan empirik tersebut selaras dengan pembelajaran berbasis proyek ( project based learning, PBL ). Permasalahan muncul, pembelajaran berbasis proyek yang bagaimanakah yang dapat meningkatkan pemahaman mahasiswa dalam perkuliahan studi kasus dan seminar. Pada prinsipnya, penelitian ini merupakan penelitian tindakan kelas, dengan dua siklus didalamnya. Penelitian ini akan dihentikan jika mahasiswa dapat memahami prinsip-prinsip kasus dalam statistika secara utuh. Memahami berarti mahasiswa dapat menyampaikan dan mengalami sendiri kasus yang terjadi. Pada akhirnya, berdasarkan dua siklus yang dilakukan, disimpulkan bahwa mahasiswa telah memahami permasalahan dan kasus yang mungkin ada pada pengolahan data dan analisisnya. Kasus-kasus tersebut antara lain terjadi pada masalah: data dan jenis data, pengumpulan data, dan statistika yang digunakan.