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CALYPTRA : Jurnal Ilmiah Mahasiswa Universitas Surabaya
Published by Universitas Surabaya
ISSN : 23038203     EISSN : -     DOI : -
Core Subject : Education,
Education
CALYPTRA : Jurnal Ilmiah Mahasiswa Universitas Surabaya merupakan kumpulan artikel yang ditulis oleh mahasiswa Universitas Surabaya. ISSN 2302-8203
Arjuna Subject : -
Articles 3,446 Documents
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PERAN FREIGHT FORWARDER DALAM PERDAGANGAN INTERNASIONAL: STUDI KASUS YANG MING LINE, 2011-2016 SELVY LEONARTO
CALYPTRA Vol. 7 No. 2 (2019): Calyptra : Jurnal Ilmiah Mahasiswa Universitas Surabaya (Maret)
Publisher : Perpustakaan Universitas Surabaya

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Abstract

One way to increase the country's economic growth, that is international trade. Through international trade especially in export and import trade has an important role in enlarging market expansion and increasing foreign exchange revenue through inter-state economic cooperation. In this case to support the export and import of the country of Indonesia to grow and increase each year, it is necessary sea transport companies and freight forwarder service providers that are able to cover global trading. This research aims to observe the role of international expedition such as freight forwarder, the analysis is done by structured interview method that is used to determine the role of the company in improving the performance and the efficiency of all forms of infrastructure in supporting the export and import activities in Indonesia. The findings from this study that due to limited infrastructure from seaports in Indonesia resulted in cargo export delivery of imports decreased.
ANALISIS FAKTOR YANG MEMPENGARUHI PROFITABILITAS PT PEGADAIAN (PERSERO) PERIODE 2001-2015 NABILA CLAUDIA A.; Sugeng Hariadi; Mintarti Ariani
CALYPTRA Vol. 7 No. 2 (2019): Calyptra : Jurnal Ilmiah Mahasiswa Universitas Surabaya (Maret)
Publisher : Perpustakaan Universitas Surabaya

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Abstract

The purpose of this research is to examine and analize the effect of Current Ratio, Owner's Equity to Asset, and Total Assets Turn Over on Return On Equity (ROE) in PT Pegadaian (Persero). These ratios can examine the wellness of PT Pegadaian (Persero). Return On Equity (ROE) is the dependent variable, whereas Current Ratio, Owner's Equity to Asset, and Total Assets Turn Over are the independent variables. The data used is annual financial reports of PT Pegadaian (Persero) from 2001 – 2015. This empirical study use a quantitative approach and method of OLS (Ordinary Least Squares). The result of this research indicate that Current Ratio has negative and statistically insignificant effect on Return On Equity; Owner's Equity to Asset has negative and statistically significant effect on Return on Equity; Total Assets Turn Over has positive and insignificant effect on Return on Equiy.
PENGARUH CORPORATE GOVERNANCE TERHADAP TRANSPARANSI PADA PERUSAHAAN NON- KEUANGAN DI BEI PERIODE 2012-2016 Adrian Christianto; Werner Ria Murhadi; Liliana Inggrit Wijaya
CALYPTRA Vol. 7 No. 2 (2019): Calyptra : Jurnal Ilmiah Mahasiswa Universitas Surabaya (Maret)
Publisher : Perpustakaan Universitas Surabaya

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Abstract

This research aim to analyze affect corporate governance which transparency in measured stock return synchronicity.Research finding indicates that board size (komisaris), institutional ownership andleverage give positiveeffect to transparancy and volatility of firm fundamental give negative effect to transparancy . The another variabels like big4 audit, market to book ratio, and firm size give not effect to transparancy.
EKSTRAK DAUN TEH HITAM SEBAGAI ANTIOKSIDAN ALAMI MINYAK KELAPA BLACK TEA LEAVES EXTRACT AS A NATURAL ANTIOXIDANT IN COCONUT OIL Agnes Belinda Ferina; Tjandra Pantjajani; Ruth Chrisnasari
CALYPTRA Vol. 7 No. 2 (2019): Calyptra : Jurnal Ilmiah Mahasiswa Universitas Surabaya (Maret)
Publisher : Perpustakaan Universitas Surabaya

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Abstract

Coconut oil can undergo rancidity during the usage. Rancidity in coconut oil can occur due to the oxidation process. Antioxidant mostly used to prevent oil oxidation. Synthetic antioxidant usually used as a preservative in commercial oil, however synthetic antioxidant had been known to cause several health problems. Therefore, this research was aimed to study the addition of antioxidant from crude extract of black tea leaves in coconut oil quality which treated to accelerate its rancidity. Black tea leaves were extracted using 3 different solvents to determine the best solvent to extract the antioxidant from black tea leaves which gave the highest antioxidant activity. The best solvent to extract the black tea leaves was found to be ethanol 96% with the antioxidant activity of 75,01%. As much as 0,01% (v/v) crude extract of black tea leaves then used for treatment to prevent the deterioration of coconut oil. The oil quality was assessed by measuring iodine value, peroxide value, TBA value and the change in colour and viscosity. The results showed that the addition of crude extract from black tea leaves delayed the oxidation rate in coconut oil compared to the control (without extract addition). The antioxidant efficiency of crude extract from black tea leaves was 1,5.
EKSTRAK DAUN TEH HIJAU (CAMELLIA SINENSIS) SEBAGAI XANTIOKSIDAN ALAMI MINYAK KELAPA (COCOS NUCIFERA) Yessyca Octavia; Ruth Chrisnasari; Maria Goretti Marianti P.
CALYPTRA Vol. 7 No. 2 (2019): Calyptra : Jurnal Ilmiah Mahasiswa Universitas Surabaya (Maret)
Publisher : Perpustakaan Universitas Surabaya

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Coconut oil can be used to fulfill the high demand for cooking oil in Indonesia. The quality of coconut oil can decrease because of oxidation. Oxidation can be prevented by adding natural antioxidant such as green tea. The objective of this research was to optimize the process of metabolite extraction with highest antioxidant activity. The solvent used for extraction were ethanol 96%, asetonitril 50% and acetone 25%. Green tea extract was analyzed quantitatively using Total Phenolic Compound (TPC) and 2,2-diphenyl-1-pichrylhydraziyl (DPPH). The crude extract from green tea from maceration using ethanol 96% gave the highest inhibition at about 90,8 ± 0,71%. Thin Layer Chromatography (TLC) analysis showed existence of catechin and myrecetin in the extract. As much as 0,01% was applied as natural antioxidant in coconut oil. The quality of coconut oil observed by iodine value, peroxide value, TBA value, colour and viscosity changed. The result showed that the addition of green tea extract can prevent oxidation rate with efficiency of 1,5.
FORMULASI PAKAN TERNAK SAPI PERAH BERBAHAN DASAR BLOTONG, TONGKOL JAGUNG, DAN TEPUNG IKAN KUALITAS RENDAH DENGAN PENAMBAHAN PROBIOTIK Euginius Eduard Effendi; Ruth Chrisnasari; Tjandra Pantjajani
CALYPTRA Vol. 7 No. 2 (2019): Calyptra : Jurnal Ilmiah Mahasiswa Universitas Surabaya (Maret)
Publisher : Perpustakaan Universitas Surabaya

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Abstract

Cattle feed is a product made from a variety of organic compounds that are useful as a staple food of cattle. Filter cake usually called blotong is solid mud from the sugar mill industrial. Corn cob is an agriculture waste. Low quality fish flour is fish waste which is dried and milled. Cattle feed formulation made from raw materials has a completeness in meeting the nutritional needs of dairy cattle feed. The three ingredients processed into animal feed formulations to find the best and qualify the Indonesian National Standard (SNI). The best formulation with the composition of the filter cake 30%, 30% corn cobs, and low quality fish flour 40%. The formulation has a reduced sugar content of 0,21%, 1,6% total sugar, 4,23% water, 8,48% ash, 21,69% crude fiber, 21.3% protein, 1.84% fat, and pH of 6.39. Best cattle feed formulation was fermented by Lactobacillus acidophilusuntil seven days. After observation, reduced sugar content, total sugar, crude fiber, and pH were decreased. Probiotics was determined using Total Plate Count with the number of cells 6,12x1010 on the seventh day of fermentation.
FERMENTASI ANGGUR (WINE) DARI MANGGA KUWINI (MANGIFERA ODORATA) MENGGUNAKAN SACCHAROMYCES CEREVISIAE Margaretha Maria Stephanie; Tjandra Pantjajani; Mangihot Tua Goeltom
CALYPTRA Vol. 7 No. 2 (2019): Calyptra : Jurnal Ilmiah Mahasiswa Universitas Surabaya (Maret)
Publisher : Perpustakaan Universitas Surabaya

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Kuwini mango (Mangifera odorata) is a fruit that has a fibrous fruit flesh and flavorful seared so far underutilized. Wine mango Kuwini is one way to increase the economic value and utilization of mango Kuwini, as well as increasing the diversity of food products. In this study Kuwini mango meat processed into juice mango mangoes Kuwini by comparison Kuwini: water 1:2. Granulated sugar is added to the variation of 0%, 5%, 15% and 25%. The results showed that the addition of sugar at the beginning of the fermentation of wine can increase the levels of ethanol in wine Kuwini mango, mango wine Kuwini thus meet the Indonesian National Standard (SNI). Wine mango Kuwini with a difference of optimum increase in the ethanol content is the addition of sugar as much as 15%, with an increase in ethanol content of 8.47%. It also observed changes in total sugar, reducing sugar, total acid tertitrasi (TAT), pH, ethanol and Saccharomyces cerevisiae cell count before and after fermentation. The test results of microbial contaminants Salmonella sp. and coliforms were negative, and a test of the total number of bacterial contaminants are below the maximum contaminant limit (<1 × 102). The test results hedonic / A indicates that the mango wine Kuwini with the addition of 25% sugar has the highest preference level compared with mango wine Kuwini with the addition of sugar 0%, 5% and 15%.
FRAKSINASI DAN UJI AKTIVITAS ANTIMIKROBA KULIT BUAH PISANG RAJA (MUSA SAPIENTUM) TERHADAP BAKTERI PENYEBAB JERAWAT PROPIONIBACTERIUM ACNES Albastomi Eridian Putra; Tjandra Pantjajani; Ernest Suryadjaja
CALYPTRA Vol. 7 No. 2 (2019): Calyptra : Jurnal Ilmiah Mahasiswa Universitas Surabaya (Maret)
Publisher : Perpustakaan Universitas Surabaya

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ABSTRAK Jerawat (Acne vulgaris) merupakan gangguan kulit yang umum dialami. Salah satu dari penyebab munculnya jerawat adalah infeksi Propionibacterium acnes. Tujuan dari penelitian ini adalah untuk menemukan alternatif agen antimikroba dari komposisi bahan alam/fitokimia untuk menanggulangi jerawat. Agen antimikroba yang dimaksud akan diisolasi dari kulit buah pisang Raja (Musa sapientum) dengan metode maserasi menggunakan pelarut yang berbeda, yaitu akuades, hexane, dan kloroform. Ekstrak dari masing-masing pelarut akan dievaporasi menggunakan rotary evaporator sehingga didapatkan ekstrak padat. Ekstrak padat dilarutkan kembali dengan pelarutnya, lalu diujikan kepada kultur Propionibacterium acnes yang ditumbuhkan secara pour plate pada media tripticase soy agar (TSA). Hasil penelitian menunjukkan bahwa ekstrak kulit buah pisang raja (Musa sapientum) tidak mempunyai aktivitas antimikroba terhadap Propionibacterium acnes. Sementara itu, uji kualitatif senyawa fitokimia menunjukkan bahwa ekstrak air mengandung steroid dan tanin, sedangkan ekstrak hexane dan kloroform masingmasing mengandung steroid dan glikosida. Kata kunci: Jerawat, Kulit Pisang, Propionibacterium acnes, Fitokimia ABSTRACT Acne (Acne vulgaris) is a common skin disorder of the human. One of the causes of acne is infection by Propionibacterium acnes. The aim of this study was to discover alternative of microbial agent that agaist infection of Propionibacterium acnes from banana’s peel. The microbial agent was extracted from banana’s peel (Musa sapientum) using maceration with different solvent: aquadest, chloroform and hexane. Extract from each solvent was evaporated using rotary evaporator to get solid extract. Solid extract redissolved with it’s solvent, then was tested in Propionibacterium acnes cultured in the TSA with pour plate method. The result of this study shown that there is no microbial activity of the extract that can against Propionibacterium acnes. Meanwhile, qualitative test of the extract shown that water extract contain steroid and tannin, while chloroform and hexane extract contain steroid and glycoside Keyword: Acne, Banana’s peel,Propionibacterium acnes, Phytochemistry
STUDI KONSERVASI ENERGI DENGAN BIPV (BUILDING INTEGRATED PHOTOVOLTAIC) PADA BANGUNAN PERPUSTAKAAN UNIVERSITAS SURABAYA Okky Andriansyah; Elieser Tarigan
CALYPTRA Vol. 7 No. 2 (2019): Calyptra : Jurnal Ilmiah Mahasiswa Universitas Surabaya (Maret)
Publisher : Perpustakaan Universitas Surabaya

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Penelitian ini bertujuan untuk mempelajari potensi aplikasi building integrated photovoltaic pada atap perpustakaan Universitas Surabaya di Surabaya, Indonesia. Sebelum mewujudkan BIPV yang sebenarnya, dibutuhkan studi konservasi energi terlebih dahulu dengan cara melakukan simulasi menggunakan software. Studi konservasi energi dilakukan dengan cara mencari potensi energi matahari di lingkungan Universitas Surabaya, kebutuhan listrik di perpustakaan Universitas Surabaya dan energi yang dihasilkan pada sistem building integrated photovoltaic. Mencari potensi energi matahari dilakukan dengan cara pengukuran radiasi matahari secara langsung dan simulasi. Kebutuhan listrik di perpustakaan Universitas Surabaya akan dilakukan secara pendataan alat-alat listrik yang ada di perpustakaan. Software yang dipakai untuk membuat sistem building integrated photovoltaic adalah SketchUp dan skelion. Penelitian ini juga melakukan analisa ekonomi pada penggunaan building integrated photovoltaic pada atap perpustakaan Universitas Surabaya serta reduksi karbon (CO2). Simpulan pada pengerjaan penelitian ini bahwa penggunaan sistem BIPV pada atap perpustakaan Universitas Surabaya bisa memenuhi kebutuhan energi listrik tanpa air conditioner di perpustakaan Universitas Surabaya dan investasi awal yang diperlukan untuk melakukan sistem BIPV ini sebesar Rp 1.944.992.700,-
PEMBUATAN GAME TOWER DEFENSE MENGGUNAKAN ALGORITMA A* Aloysius Wiranata; Budi Hartanto; Marcellinus Ferdinand Suciadi
CALYPTRA Vol. 7 No. 2 (2019): Calyptra : Jurnal Ilmiah Mahasiswa Universitas Surabaya (Maret)
Publisher : Perpustakaan Universitas Surabaya

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Nowadays, tower defense games doesn’t give its players freedom which they cannot create their own path, therefore a desktop based game of tower defense game which able to give its player freedom in creating their own path is created. This game is built using unity and can be played in single player. In this game, there is an objective that must be protected by its player. There will also be monsters that will try to find their own path to the objective. This monster will be using A* path finding algorithm. A* path finding algorithm is the most common path finding algorithm used in many games. This final project will be using A* algorithm library implemented by Aron Granberg. The using of this library is based on its clear documentation and easiness of using this library. From the result of analysis, the game will also have feature to create Custom Tower. Custom Tower is a feature that enables its player to modify attributes of a tower according to his own needs. In order to remain exciting and no tower is toooverpowered, the higher the attribute of a custom tower then the cost of building that tower will also be higher. From the game test results obtained that the presence of custom tower and custom track increases the enjoyment of playing tower defense game. Suggestions that can be given for further development is to add more variety of monsters and tower and multiplayer feature.

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