A comprehensive study of document security system, open issues and challenges

2020 ◽  
Author(s):  
Riaz A. Khan ◽  
Sajaad A. Lone
Keyword(s):  
Security System ◽  
Document Security ◽  
Open Issues ◽  
Comprehensive Study

Analysis of the hop production and processing market in the Russian food security system

2021 ◽  
pp. 95-101
Author(s):  
О.В. Чеха
Keyword(s):  
Food Security ◽  
Russian Federation ◽  
Security System ◽  
Annual Reports ◽  
Federal State ◽  
State Program ◽  
Internet Portal ◽  
Chuvash Republic ◽  
The Russian Federation ◽  
Comprehensive Study

В статье представлены результаты комплексного исследования на рынке производства и переработки хмеля. Проанализированы отчеты фирмы «Барт» и годовые отчеты International Hop Growers’ Convention в период 2007-2020 гг. Приведены и систематизированы данные Федеральной службы государственной статистики Российской Федерации, по Чувашской Республике и официального интернет-портала органов власти Чувашской Республики по формированию внутреннего рынка хмеля. Предложены меры регионального регулирования отрасли, которые согласованы с утверждённой Концепцией развития хмелеводства в Чувашской Республике на 2020-2025 гг. в рамках государственной программы. The article presents the results of a comprehensive study on the market of hop production and processing. The reports of the company «Bart» and the annual reports of International Hop Growers'are analyzed Convention in the period 2007-2020. The data of the Federal State Statistics Service of the Russian Federation on the Chuvash Republic and the official Internet portal of the authorities of the Chuvash Republic on the formation of the domestic hop market are presented and systematized. The measures of regional regulation of the industry are proposed, which are coordinated with the approved Concept of hop growing development in the Chuvash Republic for 2020-2025 within the framework of the state program.

scholarly journals Lights and Shadows: A Comprehensive Survey on Cooperative and Precoding Schemes to Overcome LOS Blockage and Interference in Indoor VLC

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 861
Author(s):  
Máximo Morales Céspedes ◽  
Borja Genovés Guzmán ◽  
Víctor P. Gil Jiménez
Keyword(s):  
High Rate ◽  
Visible Light Communications ◽  
Rf Systems ◽  
Indoor Wireless ◽  
Blocking Effects ◽  
Comprehensive Survey ◽  
Indoor Scenarios ◽  
Significant Attention ◽  
Open Issues ◽  
Comprehensive Study

Visible light communications (VLC) have received significant attention as a way of moving part of the saturated indoor wireless traffic to the wide and unregulated visible optical spectrum. Nowadays, VLC are considered as a suitable technology, for several applications such as high-rate data transmission, supporting internet of things communications or positioning. The signal processing originally derived from radio-frequency (RF) systems such as cooperative or precoding schemes can be applied to VLC. However, its implementation is not straightforward. Furthermore, unlike RF transmission, VLC present a predominant line-of-sight link, although a weak non-LoS component may appear due to the reflection of the light on walls, floor, ceiling and nearby objects. Blocking effects may compromise the performance of the aforementioned transmission schemes. There exist several surveys in the literature focused on VLC and its applications, but the management of the shadowing and interference in VLC requires a comprehensive study. To fill this gap, this work introduces the implementation of cooperative and precoding schemes to VLC, while remarking their benefits and drawbacks for overcoming the shadowing effects. After that, the combination of both cooperative and precoding schemes is analyzed as a way of providing resilient VLC networks. Finally, we propose several open issues that the cooperative and precoding schemes must face in order to provide satisfactory VLC performance in indoor scenarios.

scholarly journals Security Evaluation of Pailiar Homormophic Encryption Scheme

2020 ◽  
pp. 12-17
Author(s):  
Daniel Asiedu ◽  
Abdul-Mumin Salifu
Keyword(s):  
Information Security ◽  
Security System ◽  
Security Evaluation ◽  
Encryption Scheme ◽  
Security Vulnerabilities ◽  
Encryption Schemes ◽  
Open Issues

In modern days of information security, much attention is drifted towards achieving the major security triad of privacy, authentication and availability. Pailiar homormophic encryption is one of the most widely area of pubic key encryption schemes researchers are exploring to enhance information security. In this paper, we presented an overview of the Pailiar cryptosystem. We further evaluated the security vulnerabilities in the cryptosystem. This was achieved through mathematical theorems and inductions. This is to present some open issues for further research to propose and implement a more robust security system based on the Pailiar homormophic encryption scheme. 

Progress In The Practical Application Of Automated Image Analysis To Tem Negatives

1977 ◽  
Vol 35 ◽  
pp. 214-217
Author(s):  
F. A. Heckman ◽  
E. Redman ◽  
J.E. Connolly
Keyword(s):  
Image Analysis ◽  
Image Quality ◽  
Exposure Time ◽  
Image Contrast ◽  
Automated Image Analysis ◽  
Practical Application ◽  
Factors Affecting ◽  
High Image Quality ◽  
Qualitative Evidence ◽  
Comprehensive Study

In our initial publication on this subject1) we reported results demonstrating that contrast is the most important factor in producing the high image quality required for reliable image analysis. We also listed the factors which enhance contrast in order of the experimentally determined magnitude of their effect. The two most powerful factors affecting image contrast attainable with sheet film are beam intensity and KV. At that time we had only qualitative evidence for the ranking of enhancing factors. Later we carried out the densitometric measurements which led to the results outlined below.Meaningful evaluations of the cause-effect relationships among the considerable number of variables in preparing EM negatives depend on doing things in a systematic way, varying only one parameter at a time. Unless otherwise noted, we adhered to the following procedure evolved during our comprehensive study:Philips EM-300; 30μ objective aperature; magnification 7000- 12000X, exposure time 1 second, anti-contamination device operating.

Hexachlorobenzene toxicity in the monkey ovary: III. Ultrastructure induced by high (10 mg/kg) dose exposure

1991 ◽  
Vol 49 ◽  
pp. 130-131
Author(s):  
A. Singh ◽  
A. Dykeman ◽  
J. Jarrelf ◽  
D. C. Villeneuve
Keyword(s):  
Present Report ◽  
Reproductive Toxicity ◽  
Control Group ◽  
Primate Model ◽  
Human Follicular Fluid ◽  
Thin Sections ◽  
Cynomolgus Monkeys ◽  
Cacodylate Buffer ◽  
Induction Cycle ◽  
Comprehensive Study

Hexachlorobenzene (HCB), a persistent and mobile organochlorine pesticide, occurs in environment. HCB has been shown to be present in human follicular fluid. An objective of the present report, which is part of a comprehensive study on reproductive toxicity of HCB, was to determine the cytologic effects of the compound on ovarian follicles in a primate model.Materials and Methods. Eight Cynomolgus monkeys were housed under controlled conditions at Animal facility of Health and Welfare, Ottawa. Animals were orally administered gelatin capsules containing HCB mixed with glucose in daily dosages of 0.0 or 10 mg/kg b.w. for 90 days; the former was the control group. On the menstrual period following completion of dosing, the monkeys underwent an induction cycle of superovulation. At necropsy, one-half of an ovary from each animal was diced into ca. 2- to 3-mm cubed specimens that were fixed by immersion in 2.5% glutaraldehyde in 0.1 M cacodylate buffer (pH 7.3). Subsequent procedures followed to obtain thin sections that were examined in a Hitachi H-7000 electron microscope have been described earlier.

Comparison of Substructures Between Uniaxial and Biaxial Deformation in 1100-0 Aluminum

1981 ◽  
Vol 39 ◽  
pp. 52-53
Author(s):  
D. L. Rohr ◽  
S. S. Hecker
Keyword(s):  
Plastic Strain ◽  
Cell Walls ◽  
Room Temperature ◽  
Mechanical Response ◽  
Biaxial Tension ◽  
Initial Deformation ◽  
Uniaxial Deformation ◽  
Biaxial Deformation ◽  
Stress States ◽  
Comprehensive Study

As part of a comprehensive study of microstructural and mechanical response of metals to uniaxial and biaxial deformations, the development of substructure in 1100 A1 has been studied over a range of plastic strain for two stress states.Specimens of 1100 aluminum annealed at 350 C were tested in uniaxial (UT) and balanced biaxial tension (BBT) at room temperature to different strain levels. The biaxial specimens were produced by the in-plane punch stretching technique. Areas of known strain levels were prepared for TEM by lapping followed by jet electropolishing. All specimens were examined in a JEOL 200B run at 150 and 200 kV within 24 to 36 hours after testing.The development of the substructure with deformation is shown in Fig. 1 for both stress states. Initial deformation produces dislocation tangles, which form cell walls by 10% uniaxial deformation, and start to recover to form subgrains by 25%. The results of several hundred measurements of cell/subgrain sizes by a linear intercept technique are presented in Table I.

Microvasculature and structure of hemal lymph nodes in the wall of the rabbit bladder: a vascular corrosion casting and EM study

1995 ◽  
Vol 53 ◽  
pp. 1074-1075
Author(s):  
F.E. Hossler ◽  
M.I. McKamey ◽  
F.C. Monson
Keyword(s):  
Lymph Nodes ◽  
Light Microscopy ◽  
Corrosion Casting ◽  
Fixed Tissue ◽  
Infusion Pressure ◽  
India Ink ◽  
Cacodylate Buffer ◽  
Rabbit Bladder ◽  
Lateral Walls ◽  
Comprehensive Study

A comprehensive study of the microvasculature of the normal rabbit bladder, revealed unusual "capillary glomeruli" along the lateral walls. Here they are characterized as hemal lymph nodes using light microscopy, SEM, TEM, ink injection, and vascular casting.Bladders were perfused via a cannula placed in the abdominal aorta with either 2% glutaraldehyde in 0.1M cacodylate buffer (pH 7.4) for fixation, 10% India ink in 0.9% saline and 0.1M phosphate (pH 7.4) for vessel tracing, or resin (Mercoximethylmethacrylate: catalyst, 4:1:0.3; Ladd Research Industries) for vascular corrosion casting. Infusion pressure was 100mm Hg. Fixed tissue was sectioned from epon-araldyte resin, and stained with toluidine blue for light microscopy, and lead and uranium for TEM. Ink injected tissue was photographed directly from saline-filled bladders illuminated from below. Resin-filled tissue was macerated in 5% KOH and distilled water. Casts were critical point dried, sputter coated with goldpalladium, and examined by routine SEM at 10 KV.

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