Fornecimento de uma abordagem híbrida para aumentar a precisão da detecção de intrusos na computação em nuvem e a geração de alarmes falsos.

As cloud computing services are presented via internet, the security and privacy are the key issues these services encounter. The open and distributive (decentralized) structure of cloud computing has changed this kind of computing into targets for hackers, cyber attackers and intruders. The relevant studies conducted by the International Data Research Institute reveal that security is the biggest challenge for cloud computing.For efficiency and more effectiveness of intrusion detection systems, they should take detection in real-time and online. Intrusion detection systems (IDS) using signature-based detection techniques (like snort) are careful and real-time intrusion systems, which can detect known attacks immediately and activate security mechanisms according to known attack patterns and known attach databank. However, these systems practically lose their efficiency against unknown attacks. Hence, this study has tried to present a hybrid method to enhance intrusion detection accuracy in cloud computing and the amount of production of false warnings in them.Dado que los servicios de computación en la nube se presentan a través de Internet, la seguridad y la privacidad son los problemas clave que enfrentan estos servicios. La estructura abierta y distributiva (descentralizada) de la computación en la nube ha transformado este tipo de informática en objetivos para piratas informáticos, atacantes cibernéticos e intrusos. Los estudios pertinentes realizados por el Instituto Internacional de Investigación de Datos revelan que la seguridad es el mayor desafío para la computación en la nube.Para lograr una mayor eficiencia y efectividad de los sistemas de detección de intrusos, deben detectarse en tiempo real y en línea. Los sistemas de detección de intrusiones (IDS) que usan técnicas de detección basadas en firmas (como snort) son sistemas de intrusión cuidadosos y en tiempo real, que pueden detectar ataques conocidos inmediatamente y activar mecanismos de seguridad de acuerdo con patrones de ataque conocidos y banco de datos adjunto conocido. Sin embargo, estos sistemas prácticamente pierden su eficacia contra ataques desconocidos. Por lo tanto, este estudio ha intentado presentar un método híbrido para mejorar la precisión de la detección de intrusos en la computación en la nube y la cantidad de producción de advertencias falsas en ellos.Como os serviços de computação em nuvem são apresentados via Internet, a segurança e a privacidade são os principais problemas que esses serviços encontram. A estrutura aberta e distributiva (descentralizada) da computação em nuvem transformou esse tipo de computação em alvos para hackers, invasores cibernéticos e intrusos. Os estudos relevantes conduzidos pelo International Data Research Institute revelam que a segurança é o maior desafio para a computação em nuvem.Para eficiência e mais eficácia dos sistemas de detecção de intrusão, eles devem fazer a detecção em tempo real e on-line. Sistemas de detecção de invasão (IDS) usando técnicas de detecção baseadas em assinatura (como snort) são sistemas de intrusão cuidadosos e em tempo real, que podem detectar ataques conhecidos imediatamente e ativar mecanismos de segurança de acordo com padrões de ataque conhecidos e bancos de dados conhecidos. No entanto, esses sistemas praticamente perdem sua eficiência contra ataques desconhecidos. Portanto, este estudo tentou apresentar um método híbrido para melhorar a precisão da detecção de intrusão na computação em nuvem e a quantidade de produção de alertas falsos neles

Fundus Autofluorescence and Clinical Applications

Fundus autofluorescence (FAF) has allowed in vivo mapping of retinal metabolic derangements and structural changes not possible with conventional color imaging. Incident light is absorbed by molecules in the fundus, which are excited and in turn emit photons of specific wavelengths that are captured and processed by a sensor to create a metabolic map of the fundus. Studies on the growing number of FAF platforms has shown each may be suited to certain clinical scenarios. Scanning laser ophthalmoscopes, fundus cameras, and modifications of these each have benefits and drawbacks that must be considered before and after imaging to properly interpret the images. Emerging clinical evidence has demonstrated the usefulness of FAF in diagnosis and management of an increasing number of chorioretinal conditions, such as agerelated macular degeneration, central serous chorioretinopathy, retinal drug toxicities, and inherited retinal degenerations such as retinitis pigmentosa and Stargardt disease. This article reviews commercial imaging platforms, imaging techniques, and clinical applications of FAF

GAIN ENHANCEMENT OF DIELECTRIC RESONATOR LOADED WAVE-GUIDE ANTENNAS WITH DIELECTRIC OVERLAYS

The gain characteristics of a dielectric resonator loaded coaxial probe fed circular waveguide antenna (DRLWA) with overlaying parasitic discs have been investigated experimentally. Results indicate that, when properly spaced, the overlays can enhance the gain by more than 6 dB. This record was migrated from the OpenDepot repository service in June, 2017 before shutting down

Acquired Vitelliform Macular Degeneration: Characteristics and Challenges of Managing Subretinal Fluid

Purpose: To highlight diagnostic challenges in patients with acquired vitelliform macular degeneration (AVMD) with subretinal fluid (SRF) and to examine the characteristics of image findings in patients with AVMD. Methods: In this retrospective review, the electronic medical record of 22 eyes of 16 patients with AVMD was studied. The rates of SRF, drusen, pigment epithelial detachment (PED), and patient clinical information such as age, length of follow-up, and BCVA were assessed. Results: The mean age at diagnosis with AVMD was 72 years with a mean follow-up time of 29 months. Median best-corrected visual acuity (BCVA) was 20/33 at presentation and 20/33 at final follow-up. Drusen was found in 13 of 22 eyes (59.1%), PEDs in 4 of 22 eyes (18.2%), and SRF in 10 of 22 eyes (45.5%) at some point during their follow-up. Of the 10 eyes with SRF, 70% were center involving, and recurrence occurred in 40%, all in the same location as the initial presentation of SRF. Three eyes received an anti-vascular endothelial growth factor injection for SRF. In 66% of cases receiving an injection, the fluid later relapsed and remitted without further injections during the course of follow-up. Conclusion: AVMD occurs in the same demographic as age-related macular degeneration (AMD) and has many common features. SRF in AVMD tends to be center involving and recurs usually in the same location as its origin. The use of anti-VEGF injections did not seem to improve SRF in contrast to the SRF seen in wet AMD. Proper differentiation of AVMD may prevent unnecessary long-term treatment with intravitreal anti-VEGF injections

Effects of Anethum graveolens L. seed extracts on experimental gastric irritation models in mice

BACKGROUND: As a folk remedy, Anethum graveolens seed (dill) is used for some gastrointestinal ailments. We aimed to evaluate aqueous and ethanolic extracts of anti-ulcer and acute toxicity effects of the Anethum graveolens in mice. RESULTS: Gastric mucosal lesions were induced by oral administration of HCl (1 N) and absolute ethanol in mice. The acidity and total acid content of gastric juice were measured in pylorus-ligated mice. LD(50 )values of the aqueous and ethanolic extracts were 3.04 g/kg, i.p., (1.5, 6.16) and 6.98 g/kg, i.p., (5.69, 8.56), respectively. The efficacy of high dose of extracts (p.o.) was similar to sucralfate. The acidity and total acid content were reduced by the orally or intraperitoneally administration of the extracts. CONCLUSIONS: The results suggest that A. graveolens seed extracts have significant mucosal protective and antisecretory effects of the gastric mucosa in mice

Multi-Hole Waveguide Directional Couplers

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RESPONSES OF EGGPLANT (SOLANUM MELONGENA L.) TO DIFFERENT RATES OF NITROGEN UNDER FIELD CONDITIONS

The present study was carried out to evaluate the effect of nitrogen fertilizer on growth and yield of eggplant (Solanum melongena L.) under field conditions. Nitrogen was applied in four rates (0, 50, 100 and 150 Kg/ha). Average plant height, lateral stem number, leaf chlorophyll content, flower number, fruit weight and plant yield were determined , Increasing rates of Nitrogen significantly affected plant vegetative growth (plant height, lateral stem number, and leaf chlorophyll content).The highest lateral stem number and leaf chlorophyll content were obtained in plants receiving 150 Kg N ha -1. Nitrogen fertilizer affected flower number and the days to first flowering. Nitrogen application decreased the days to first flowering and treated plants flowered early than control. It was observed that fertilization with 100 Kg N ha-1 resulted in the highest average fruit weight and fruit yield. Our results showed that nitrogen fertilization has strongly influenced vegetative and reproductive growth of eggplant plants grown under field conditions

A Compact Analytical Design of Dual-Loop 18 GHz Frequency Synthesizer to Enhance Signal Reliability in Digital Millimeter Radio Link System

In this paper a high resolution dual-loop 17.7�19.7 GHz frequency synthesizer is presented which is compatible with ITU-R (F.595-6) standards. The investigations of phase noise and spur frequency contents are discussed in detail. The simulated and measured phase noise and spur frequency contents are similar to one another. Phase noise of �81 dBc/Hz in 17.7 GHz at 10 KHz offset frequency is measured by (HP8560) series Spectrum analyzer and it matches with predicted measurements. This record was migrated from the OpenDepot repository service in June, 2017 before shutting down

Protein Enrichment of Olive Cake Substrate by Solid State Fermentation of Lentinus edodes

Solid-state fermentation technique can be used for protein enrichment of the olive cake substrate (OCS). Among microorganisms, mushrooms, in particular, white-rot fungi belonging to the genus Lentinus is known for its ability to digest the lignin and also the most effective producers of lignocellulosic enzymes. Hence, the objective of this work is to evaluate the effect of Lentinus edodes on protein content of agro by-product namely, olive cake substrate. To do so, solid state fermentation was performed at 25ºC in different conditions including various nitrogen sources, inoculum size, fermentation time, and moisture content using glass bottle as bioreactor. Protein extraction was carried out at 4ºC. The results obtained show significantly increasing protein content of OCS. HIGHLIGHTS•Solid-state fermentation technique can be used for protein enrichment of the olive cake substrate (OCS).•The nutritional value of olive cake substrate (OCS) was improved upon fungal treatment.•Lentinus edodes fungi enhanced the protein content in experimental OCS

Multifrequency Wilkinson power divider using microstrip nonuniform transmission lines

A new idea is proposed to modify the conventional Wilkinson power dividers to operate at two or several desired frequencies. The proposed structure contains two Microstrip Nonuniform Transmission Lines (MNTLs) instead of two uniform ones with nearly the same length at the minimum frequency. The strip width of MNTLs is considered variable and is written as a truncated Fourier series. Three nonuniform power dividers are designed and one of them operating at frequencies 1.0, 2.8, and 4.5 GHz is fabricated and measured. The measured results of the fabricated diplexer have a good agreement with the theoretical results. This record was migrated from the OpenDepot repository service in June, 2017 before shutting down