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All Journal ALGORITMA : JURNAL ILMU KOMPUTER DAN INFORMATIKA Jurnal Manajemen Bisnis dan Kewirausahaan INFOKUM Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences
Tommy Tommy
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Religion Arts Humanities Computer Science & IT Economics, Econometrics & Finance Social Sciences

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DUAL TREE HUFFMAN ENCODING IMPLEMENTATION TO REDUCE LOW FREQUENCY BIT CODES Tommy Tommy
INFOKUM Vol. 9 No. 2, June (2021): Data Mining, Image Processing and artificial intelligence
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (261.016 KB)

Abstract

Huffman encoding is a compression algorithm that uses symbol encoding using a simpler bit substitution based on the frequency of the symbol. A symbol will be represented with much fewer bits if it has a large frequency. Conversely, symbols with less frequency will be encoded with bits of greater length. The bit code for symbols with lower frequencies often has a very long size which sometimes causes the compressed file size to be larger than the original file. This study develops the implementation of two separate Huffman trees by dividing the symbol list into two lists, each of which will form a bit code in parallel. This implementation is able to minimize the length of the symbol bit code, especially in symbols with low frequencies so as to increase the compression ratio for several types of content which is become the weakness of the original Huffman.
The Effect of Current Ratio (CR), Firm Size (FS), Return on Equity (ROE), and Earning Per Share (EPS) on the Stock Prices of Manufacturing Companies listed in Indonesia Stock Exchange in the 2014-2018 Period Yeni Ariesa; Tommy Tommy; Jane Utami; Intan Maharidha; Nanda Ciptara Siahaan; Nelson Boas Nainggolan
Budapest International Research and Critics Institute (BIRCI-Journal): Humanities and Social Sciences Vol 3, No 4 (2020): Budapest International Research and Critics Institute November
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birci.v3i4.1286

Abstract

This study aims to determine the effect of Current Ratio on stock prices, the effect of Firm Size on stock prices, the effect of Return On Equity on Stock Prices, the effect of Earning Per Share on Stock Prices, and the influence of Current Ratio, Firm Size, Return On Equity, and Earning Per Share simultaneously on stock prices in the 5 year period, 2014-2018. This study uses a quantitative approach with a descriptive statistical analysis type. The population in this study amounted to 150 companies. This study uses financial statement data with time series for the last 5 years published from www.idx.co.id. In this study, the sample selection used purposive sampling technique. The sample of this study contained 49 companies in the last 5 years with a total sample quantity of 245 manufacturing companies. The results of this study indicate that partially Current Ratio and Return On Equity have no and insignificant effect on stock prices of manufacturing companies. Partially Firm Size and Earning Per Share have a positive and significant effect on stock prices of manufacturing companies. Meanwhile, the independent variable Current Ratio, Firm Size, Return On Equity, and Earning Per Share simultaneously have a significant effect on the variable stock price of manufacturing companies.
Analisis Parameter Kompresi Algoritma Elias Omega Code dan Fibonacci Code Pada File Digital Ibrahim Hasan; Tommy Tommy; Nenna Irsa Syahputri
ALGORITMA : JURNAL ILMU KOMPUTER DAN INFORMATIKA Vol 5, No 1 (2021): April 2021
Publisher : UIN Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/algoritma.v5i1.9069

Abstract

The need for greater storage capacity is the cause of the emergence of various compression techniques.By compressing, large data will be reduced in size so as to save storage capacity. In this research, usingthe Elias Omega Code and Fibonacci Code algorithms, the performance will be measured with the ratioof compression, compression ratio and space saving in digital text files. Compression is done by readingthe string in a digital text file, then the Elias Omega Code algorithm and the Fibonacci Code algorithmcreate a string code and perform the compression process. From the final result of the compression,files with extension * .EB and * .FB contain character information and Bit String from the compressionresult that can be decompressed. From the output of the decompression is the original digital text filethat is saved with the file extension * .txt. In testing this system, a sample is used, namely a stringconsisting of one type of character stored in a digital text file with the extension * .txt. From thecompression process on digital file character strings, the Fibonacci Code algorithm is superior in termsof compression ratio of compression with an average of 1.72, compression ratio with an average of 57%and space saving of an average of 42%.Keywords: analysis, compression, text, Elias Omega Code, Fibonacci Code
Pengaruh Kepuasan Konsumen, Harga, Kualitas Produk, Dan Promosi Terhadap Loyalitas Merek Alat Angkat / Crane Xyz Pada Pt.Abc Tommy Tommy
Jurnal Manajemen Bisnis dan Kewirausahaan Vol 2, No 2 (2018): Jurnal Manajemen Bisnis Dan Kewirausahaan
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (490.987 KB) | DOI: 10.24912/jmbk.v2i2.4833

Abstract

The research aims to determine the effect of customer satisfaction, price, product quality and promotion of brand loyalty of PT ABC lifting equipment (crane). The tool used to obtain the data is a questionnaire using Likert scale. Sampling technique is purposive sampling that is technique of determining sample with certain consideration. The sample in this research is some of PT.ABC consumers in Indonesia which amounted to 50 people, but only 43 respondents who answered this questionnaire. The results show that customer satisfaction has a significant influence on brand loyalty, while price, product quality and promotion have no significant effect on brand loyalty.
Implementasi Liniear Congruential Generator Pada Pembangkitan Inizialization Vector Pada Kriptografi CBC Sederhana Sari Kurnia Riski; Tommy Tommy; Arief Budiman
ALGORITMA : JURNAL ILMU KOMPUTER DAN INFORMATIKA Vol 7, No 1 (2023): (April 2023)
Publisher : UIN Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/algoritma.v7i1.15409

Abstract

In this era of increasingly advanced technology, data security is very important in maintaining the confidentiality of information, especially those containing sensitive information whose contents should only be known by the entitled party, especially if the delivery is made through a public network, if the data is not secured first. , will be very easy to be tapped and the contents of the information known by parties who do not have the authority. One way that is used for data security is to use a cryptographic system, namely by encoding or keying the information content using a data locking algorithm method. Here this author will discuss about generating IV using the LCG algorithm are combined by XORing everyption method in simple CBC cryptography where these two algorithm are combined by XORing every bit that exists with the key or block provided. Aims to produce plaintext that has been convertd into ciphertext or secret data. Keywords : data security, cryptographic algorithm lcg, xor cipher, simple cbc method.
Co-Authors Arief Budiman Ibrahim Hasan Intan Maharidha Jane Utami Nanda Ciptara Siahaan Nelson Boas Nainggolan Sari Kurnia Riski Syahputri, Nenna Irsa Yeni Ariesa