scholarly journals Penerapan Algoritma Punctured Elias Codes Dalam Kompresi Citra

2020 ◽  
Vol 2 (2) ◽  
pp. 176-187
Author(s):  
Dwi Ayu Depika ◽  
Surya Darma Nasution
Keyword(s):  
Free Space ◽  
Memory Storage ◽  
Compression Method ◽  
Memory Space ◽  
Multiple Images ◽  
Storage Media ◽  
Opening Up

In the process of managing multiple images or images, with larger image sizes or images that can hold longer storage and larger storage, it is needed more often as it cannot be contained on storage media and is not conveyed, thus opening up free space in memory storage media. So to make a lot of free space and have a data size that is not large on the storage media, a compression method is needed which means to shorten the required bit size. Punctured Elias Algorithm Code can be used to obtain information about the compression performed by compressing images to provide benefits in storage and requires more memory space compared to uncompressed images.

Case Study: Opening Up Memory Space: The Challenges of Audiovisual History

2012 ◽  
Author(s):  
Albert Lichtblau
Keyword(s):  
Oral History ◽  
Paradigm Shift ◽  
Technical Development ◽  
Primary Sources ◽  
Memory Space ◽  
New Methods ◽  
Written Form ◽  
Opening Up ◽  
Recording Techniques

The emergence of oral history was connected with a technical development—namely the possibility of recording human voices. The recording techniques developed rapidly. This article discusses the challenges faced while recording audiovisual history. In the 1980s expensive filmmaking began to be replaced by more affordable video formats, which took the technical development of oral history to a new audiovisual level. The paradigm shift generated by oral history in which historians began to generate their own primary sources announced another transformation of the way historians worked: taking leave of the written form and communicating scholarly results in audiovisual form. This article seeks to describe what the integration of the visual aspect means for oral historians in generating documents of remembrance. It elaborates on a few concrete examples of how integrating the camera's eye has shaped audiovisual history. A discussion on negotiation of remembrance followed by new methods and issues of videohistory concludes this article.

PENERAPAN ALGORITMA LEVENSTEIN PADA APLIKASI KOMPRESI FILE MP3

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Tetti Purnama Sari ◽  
Surya Darma Nasution ◽  
Rivalri Kristianto Hondro
Keyword(s):  
Data Storage ◽  
Lossless Compression ◽  
Empty Space ◽  
Original Data ◽  
Quality Data ◽  
Storage Space ◽  
Compression Method ◽  
Compression Process ◽  
Transmission Process ◽  
Storage Media

Compressed files require less disk space than files that are not compressed, so compressing is useful for backing up data by using storage space to be small or to send information over the Internet faster. MP3 makes the audio format often used because the data stored resembles the original data when recorded and has a size that is not too large compared to other formats. Users besides storing song files, they also store videos and other files and users also want the highest quality data and minimum quantity (size). So to make a lot of empty space and have a size of data that is not large on storage media, a compression method that means to shorten the size of the bits needed for data is needed. Algorithms used in the compression process, including the Levenstein algorithm which is a type of lossless compression. Applying the Levenstein algorithm to the compression process the author wants to know the performance of compression when done by compressing MP3 files, so that large MP3 files will be compressed into smaller sizes, so that the transmission process is carried out faster and reduces the data storage location.Keywords: MP3, File, Levenstein

scholarly journals A novel approach for big data processing using message passing interface based on memory mapping

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Saad Ahmed Dheyab ◽  
Mohammed Najm Abdullah ◽  
Buthainah Fahran Abed
Keyword(s):  
Big Data ◽  
Data Processing ◽  
Message Passing ◽  
High Performance ◽  
Message Passing Interface ◽  
Memory Storage ◽  
Big Data Processing ◽  
Memory Space ◽  
Novel Approach ◽  
Memory Mapping

AbstractThe analysis and processing of big data are one of the most important challenges that researchers are working on to find the best approaches to handle it with high performance, low cost and high accuracy. In this paper, a novel approach for big data processing and management was proposed that differed from the existing ones; the proposed method employs not only the memory space to reads and handle big data, it also uses space of memory-mapped extended from memory storage. From a methodological viewpoint, the novelty of this paper is the segmentation stage of big data using memory mapping and broadcasting all segments to a number of processors using a parallel message passing interface. From an application viewpoint, the paper presents a high-performance approach based on a homogenous network which works parallelly to encrypt-decrypt big data using AES algorithm. This approach can be done on Windows Operating System using .NET libraries.

scholarly journals Data compression algorithms for sensor networks with periodic transmission schemes

2022 ◽  
Vol 355 ◽  
pp. 03003
Author(s):  
Jianxin Chen ◽  
Pengcheng Wang ◽  
Xinzhuo Ren ◽  
Haojie Meng ◽  
Yinfei Xu ◽  
...  
Keyword(s):  
Sensor Networks ◽  
Data Compression ◽  
Original Data ◽  
Transmission Model ◽  
Complex Environment ◽  
Compression Method ◽  
Theoretical Derivation ◽  
Memory Space ◽  
Change Trend ◽  
Periodic Transmission

The operating state of switch cabinet is significant for the reliability of the whole power system, collecting and monitoring its data through the wireless sensor network is an effective method to avoid accidents. This paper proposes a data compression method based on periodic transmission model under the condition of limited energy consumption and memory space resources in the complex environment of switch cabinet sensor networks. Then, the proposed method is rigorously and intuitively shown by theoretical derivation and algorithm flow chart. Finally, numerical simulations are carried out and compared with the original data. The comparisons of compression ratio and error results indicate that the improved algorithm has a better effect on the periodic sensing data with interference and can make sure the change trend of data by making certain timing sequence.

Surface Enhanced Raman Spectroscopy Of AgTCNQ Formed From Ag Micellar And Inverse Micellar Colloidal Systems

1995 ◽  
Vol 413 ◽  
Author(s):  
Ivan W. Ong ◽  
Dwaine O. Cowan ◽  
Theodore O. Poehler
Keyword(s):  
Colloidal Particles ◽  
Optical Memory ◽  
Surface Enhanced Raman Spectroscopy ◽  
Memory Storage ◽  
Colloidal Systems ◽  
Laser Raman ◽  
The Past ◽  
Storage Media ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

ABSTRACTSilver Tetracyanoquinodimethane (AgTCNQ) is an organometallic semiconductingcompound with potential for use as an optical memory storage media due to its ability to exist intwo states. A laser Raman system has been proposed for this application as the two states havedistinct Raman vibrational peaks. However, the Raman spectra of bulk AgTCNQ films is veryweak and requires special measures to prevent laser-induced degradation and to ensure adequatesignal to noise ratios. In this paper, we report a synthesis AgTCNQ consisting of AgTCNQnanolayers grown around silver colloidal particles in both water and heptane with the use of theamphiphilic surfactants, AOT and SDS. The Raman scattering of such AgTCNQ systems hasbeen found to be strongly enhanced and far superior to that obtained on bulk AgTCNQ films.We believe that such a system represents a novel and advantageous way of detecting theswitching behavior of AgTCNQ (and other metal-TCNQ compounds) by laser, as Ramanresearch on metal-TCNQ systems has been stymied in the past by poor Raman signals andsusceptibility to laser-induced degradation.

scholarly journals PENERAPAN ALGORITMA EVEN-RODEH PADA APLIKASI KOMPRESI FILE GAMBAR

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Agus Adi Pramadi ◽  
Surya Darma Nasution ◽  
Bister Purba
Keyword(s):  
Image Data ◽  
Memory Storage ◽  
Storage Allocation ◽  
Compression Technique ◽  
Image File ◽  
Storage Media ◽  
File Allocation ◽  
Code Algorithm ◽  
Speed Up ◽  
Data Files

Some image files are very large in size. So it requires a large memory storage capacity too, this is certainly a lot of costs that must be spent on the storage media. With the existence of a very large image file size in the process of sending image data files can fail because the storage media exceeds the maximum limit. The above problems can be overcome by performing the process of compressing large image files into small sizes or can reduce the bit size contained in each image file thereby saving storage containers and simplifying the process of transferring image files to other storage media. The solution to this problem is how the image file can be compressed in order to speed up the transfer and storage of image files. Image file compression aims to reduce or reduce the size of the file but does not eliminate the information data in it. With the compression technique, the data was initially large so that the size of the data can be reduced so as to save storage allocation space. In this study using the Even-Rodeh Code algorithm, using the method results in very good compression in tramisi data and transfer of image file allocation easier and faster.Keywords: Image File Compression, Event Rode Code Algorithm

Radiation Damage in Ceramics

1982 ◽  
Vol 40 ◽  
pp. 600-603
Author(s):  
T. E. Mitchell ◽  
M. R. Pascucci ◽  
R. A. Youngman
Keyword(s):  
Radiation Damage ◽  
Outer Space ◽  
Point Of View ◽  
Nuclear Waste Storage ◽  
Waste Storage ◽  
Storage Media ◽  
Transmission Electron ◽  
Fundamental Point ◽  
Small Defect ◽  
Present Understanding

1. Introduction. Studies of radiation damage in ceramics are of interest not only from a fundamental point of view but also because it is important to understand the behavior of ceramics in various practical radiation enyironments- fission and fusion reactors, nuclear waste storage media, ion-implantation devices, outer space, etc. A great deal of work has been done on the spectroscopy of point defects and small defect clusters in ceramics, but relatively little has been performed on defect agglomeration using transmission electron microscopy (TEM) in the same kind of detail that has been so successful in metals. This article will assess our present understanding of radiation damage in ceramics with illustrations using results obtained from the authors' work.

Stereo modeling of HVEM specimens by serial tilting and computer graphics

1986 ◽  
Vol 44 ◽  
pp. 34-35
Author(s):  
J.R. McIntosh ◽  
D.L. Stemple ◽  
William Bishop ◽  
G.W. Hannaway
Keyword(s):  
Computer Graphics ◽  
Analytical Methods ◽  
Photographic Film ◽  
Complex Structures ◽  
Multiple Objects ◽  
Multiple Images ◽  
3 Dimensional

EM specimens often contain 3-dimensional information that is lost during micrography on a single photographic film. Two images of one specimen at appropriate orientations give a stereo view, but complex structures composed of multiple objects of graded density that superimpose in each projection are often difficult to decipher in stereo. Several analytical methods for 3-D reconstruction from multiple images of a serially tilted specimen are available, but they are all time-consuming and computationally intense.

A New Detector System For The HB5 Stem Instrument

1985 ◽  
Vol 43 ◽  
pp. 134-135
Author(s):  
J.M. Cowley
Keyword(s):  
Dark Field ◽  
Detector System ◽  
Electron Holography ◽  
Small Specimen ◽  
Bright Field ◽  
Multiple Images ◽  
Practical Applications ◽  
Wide Range ◽  
Diffraction Patterns ◽  
Operational Modes

The HB5 STEM instrument at ASU has been modified previously to include an efficient two-dimensional detector incorporating an optical analyser device and also a digital system for the recording of multiple images. The detector system was built to explore a wide range of possibilities including in-line electron holography, the observation and recording of diffraction patterns from very small specimen regions (having diameters as small as 3Å) and the formation of both bright field and dark field images by detection of various portions of the diffraction pattern. Experience in the use of this system has shown that sane of its capabilities are unique and valuable. For other purposes it appears that, while the principles of the operational modes may be verified, the practical applications are limited by the details of the initial design.

Seeking to uncover biology's chemical roots

2019 ◽  
Vol 3 (5) ◽  
pp. 435-443 ◽  
Author(s):  
Addy Pross
Keyword(s):  
Environmental Changes ◽  
Biological Systems ◽  
Significant Development ◽  
The Road ◽  
Physical Chemical ◽  
Systems Chemistry ◽  
Biological World ◽  
Inanimate Matter ◽  
The Origin Of Life ◽  
Opening Up

Despite the considerable advances in molecular biology over the past several decades, the nature of the physical–chemical process by which inanimate matter become transformed into simplest life remains elusive. In this review, we describe recent advances in a relatively new area of chemistry, systems chemistry, which attempts to uncover the physical–chemical principles underlying that remarkable transformation. A significant development has been the discovery that within the space of chemical potentiality there exists a largely unexplored kinetic domain which could be termed dynamic kinetic chemistry. Our analysis suggests that all biological systems and associated sub-systems belong to this distinct domain, thereby facilitating the placement of biological systems within a coherent physical/chemical framework. That discovery offers new insights into the origin of life process, as well as opening the door toward the preparation of active materials able to self-heal, adapt to environmental changes, even communicate, mimicking what transpires routinely in the biological world. The road to simplest proto-life appears to be opening up.

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