Cosmos Scholars Publishing House: Journals Management System
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Degradation of Polyester Composite Reinforced E-Glass Fiber with Calcium Carbonate Filler in Seawater
Get PDFThis research is concerned with composite materials that use CaCO3 as a reinforcing material in construction, especially subsea panels and buildings. Composite materials are solids composed of two or more materials that have their own properties and improve their properties when combined. In this experiment, glass fiber and CaCO3 were mixed in a certain composition and tested to evaluate the water absorption and mechanical strength of the composite. The results show that increasing temperature can increase water absorption, while the addition of CaCO3 has a significant effect on water absorption due to its hydrophilic properties. Water absorption in polyester composites is influenced by aging temperature and Calcium Carbonate powder filler, affecting tensile and bending strength. As aging temperature increases, mechanical strength decreases, composite having the highest tensile strength. Bending tests show debonding and splitting fault patterns due to glass fiber arrangement. With a deeper understanding of how CaCO3 affects composite materials under various conditions, this research can provide valuable insights for developing more durable composite materials suitable for construction applications, especially in corrosive environments such as subsea buildings.In this research, it proposes theoretically model to controlling on half-wave voltage of modulator, in which it uses studying the factor of effective of refractive index difference, this using analysis distribution of refractive index for LN material before and after voltage is applied (i.e., with and without applied voltage), and uses analysis a factor of propagation constant difference ??, before and after voltage is applied where it depends on the wavelength, these leads to it controls on the half-wave voltage V? using a reduction half-wave voltage up to 1V. Also, it achieves an excellent solution for solve the fundamental optical mode with effective factor is neff. Finally, the modulator with an effect effective refractive index difference have lower applied voltage up to 10V, and with an effective propagation constant difference the operating voltage is from value of 20V
All-On-Four Concept Literature Review
No full textThe All-on-4 concept is a dental implant technique that provides a solution for patients who have lost or are about to lose all of their teeth in one or both jaws. This concept was developed to simplify the implant process and make it more accessible for individuals with extensive tooth loss. In the review performed in Pubmed and Cochrane Library between 2005 and 2023, Full arch implant-supported prosthesis, 4-implant full arc, osseointegration, inclined implant, total edentulism and different combinations in which some of these keywords were used together were chosen. 100 of the articles achieved from the review were evaluated with respect to the subject we examined. The inclusion criteria for articles were as follows: 1-Articles were related to the all-on-four concept. 2-Abstracts were obtained when the full texts could not be obtained. The All-on-4 concept in dental implantology offers several advantages, making it a popular and effective solution for patients with extensive tooth loss. The All-on-4 concept allows for the immediate loading of prostheses onto the implants shortly after surgery. Compared to traditional implant approaches, All-on-4 reduces treatment time significantly. The concept utilizes tilted posterior implants, which take advantage of available bone and reduce the necessity for bone grafting in areas with insufficient bone volume. All-on-4 may be more cost-effective than traditional implant-supported restorations due to the reduced number of implants and the associated surgical procedures. The concept aims to provide a fixed, full-arch prosthesis that closely resembles natural teeth. Numerous studies have reported high success rates for the All-on-4 concept, with the majority of patients experiencing successful osseointegration and long-term stability of the implants. All-on-4 often results in a more comfortable experience for patients, with fewer surgical interventions and reduced healing periods. The tilted posterior implants increase the contact between bone and implant, enhancing stability and support for the prosthesis
Treatment of Endocrine Pollutants Upstream of the Wadis Tghat and Zhoun of the City of Fez by Coagulation-Flocculation (Morocco)
No full textIn recent years, the quality of the surface water of the city of Fez has deteriorated due to the development of various anthropic activities, ill-considered modernization, unregulated discharge of wastewater and solid waste. This is a worrying threat to human health and the environment. Previous studies on these wadis have shown that Tghat and Zhoun wadis are the most polluted [1]; [2]; [3]. Adequate treatment of effluents upstream is therefore of crucial importance. The objective of this study is to contribute to the treatment of endocrine pollutants discharged upstream of these two wadis after their characterization and monitoring of their pollutant load for six months (El Madani et al., 2019). The most polluted wadis of the city of Fez [2] by coagulation-flocculation.The results showed that these effluents have a medium faecal load and are loaded by organic pollution at the limit of biodegradability rich in nitrogen and phosphorus matter and a high metallic load with endocrine disrupting effect, mainly Cr, As, Pb and Cd.The treatment of these pollutants by coagulation-flocculation with aluminum sulphate of the effluents studied under optimal conditions of pH, a dose of coagulant and flocculant and coagulation and flocculation agitation speeds, allowed the reduction of almost all the organic matter and 90 to 96% of the metal load
Formation Of Values as Psychological Immunity in Adolescent Children in The Conditions of Information Threat
No full textIn the article, in the formation of psychological immunity in adolescent children in the conditions of information threats, based on the requirements of the present time, the uniqueness of the formation of values in adolescent children and the conducted researches are analyzed and the priority values are defined
“Antibiotic Resistance in the Vibrio species isolated from the estuarine sediments of Uttara Kannada Karnataka”
No full textVibrio species are the marine pathogenic bacterium which causes the health issues in the infected organisms. Antibiotic resistance in the Vibrio species is the threat to the human health by the transfer of the resistant gene in the human from the food chain. The present study was carried out to isolate the Vibrio species and to study antibiotic resistance from the sediments of two estuaries Kali and Aghanashini from Uttara Kannada, Karnataka. The sampling was done during low tide for the period of ten months from September 2021 to June 2022. The total vibrio count was observed in range between 3.86 to 4.83 Log X101 CFU/g. Vibrio parahaemolyticus, Vibrio alginolyticus, Vibrio navarrensis and Vibrio vulnificus were isolated and identified from the sediments. The identified Vibrio species were resistant to ampicillin and sensitive to chloramphenicol and tetracycline. Due the over use of antibiotics in the aquaculture and mariculture activities there is a possibility of organism to show multiple resistance towards the antibiotics
Plants Used for Medicine To Fight Cancer
No full textThis article explores the potential of medicinal plants as a valuable resource in the fight against cancer. It delves into their mechanisms of action, effectiveness, safety considerations, and future prospects. Notable plants like turmeric, green tea, graviola, ginseng, and garlic are discussed for their promising anticancer properties. Research highlights their ability to hinder tumor growth by interacting with critical cellular processes. Clinical trials show positive outcomes, although challenges like standardization and interactions with conventional treatments need attention. Combining plant compounds and mainstream therapies offers exciting possibilities for better results. Integrating traditional knowledge with modern research is crucial for safe and effective treatments. Overcoming regulatory and ethical hurdles is essential for mainstream adoption. Looking forward, the discovery and development of novel plant-derived compounds hold significant promise. Personalized cancer treatment, blending genetic insights with targeted herbal approaches, represents an innovative path ahead. Collaboration between traditional practices and modern medicine is emphasized, spotlighting patient success stories. Looking ahead, the identification of novel compounds from plants and their subsequent development into pharmaceutical agents holds great potential. Personalized cancer treatment, combining genetic insights with targeted herbal interventions, is an exciting avenue for future exploration. This chapter underscores the urgency of collaborative efforts between traditional healing practices and modern medicine, spotlighting the inspiring experiences of patients who have benefited from integrating medicinal plants into their cancer care journey
Design And Simulation of a Hexagonal High-Gain MIMO Patch Antenna For 5G Applications
No full textView of the technological evolution and the problems encountered by the world, researchers are obliged to find solutions, particularly researchers in the field of antennas. This article has been devoted to the design and study of a hexagonal dual-band MIMO patch antenna for Satellite and 5G applications. Several parameters have been studied, we can quote among other things the gain, the bandwidth, the radiation diagram, the directivity, and the distribution of the electric field E. To achieve these studies and find optimal solutions, several designs have been made like the design of a simple hexagonal patch antenna, and, in the end, the proposed antenna is a MIMO with a hexagonal shape and 2 feeding ports. The proposed antenna operates at 25 GHz as the central frequency. The obtained ECC (envelope correlation coefficient) value is less than 0.006 for the entire operating bandwidth, which satisfies the standard value criteria of less than 0.5 and indicates minimal isolation between the antenna arrays. The values of the gain and the maximum directivity of the antenna obtained are respectively 8.12 dB and 8.37 dB, which gives us an efficiency of the antenna at 97.01% with high isolation > 25 dB. The results are found to be sufficient for the device to be used for mm-wave 5G MIMO applications. Additional MIMO performance metrics, such as the channel capacity loss (CCL), diversity gain (DG), and total active reflection coefficient (TARC), are evaluated. All this work has been done using HFSS 15 as software
A Hybrid BTC Based Compression Techniques of General Images
No full textIn this paper we propose a new approach for the compression of the general images by combining the Discrete Wavelet Transform (DWT) with Adaptive Block Truncation Coding –Edge Quantization (ABTC- EQ). At the first the standard image is processed by DWT decomposition and into its approximations and details. From this finer and approximation details are separated. The finer details of the image then noted and discarded. The approximate details are noted and further processed in to ABTC-EQ. This approach i.e combination of DWT with AMBTC-EQ gives a better result than other techniques. The Peak Signal to Noise Ratio (PSNR), Weighted Peak Signal to Noise Ratio (WPSNR), Bit Rate (BR), and Structural SIMilarity Index (SSIM) are among the parametric measurements that are used to evaluate image quality. The comparison analysis demonstrates that the suggested algorithm outperforms both BTC and ABTC-EQ
Design, Synthesis, and Computational Studies with ADMET of Novel Cardiovascular Hybrid Drugs
No full textRecently the drug discovery trend has been to design hybrid drug molecules consisting of different pharmacophore groups linked together via spacers. Calcium channel blockers have an important role in the treatment of several cardiovascular diseases. The objective of the present research work is to encompass the strategic design, synthesis, and computational assessment of novel 1,4- dihydropyridine containing calcium channel blocker hybrid containing beta blocker side chain along with NO group as promoting cardiovascular agents as a viable alternative to well-established drugs like Amlodipine, Nifedipine, Felodipine, etc. In this research, we synthesized new 18 cardiovascular hybrid compounds based on structure-activity relationship properties. The 3D crystallographic structure of the calcium channel receptor (6M7H) was obtained from PDB. RCSB and used for docking study. The molecular docking studies were carried out by using the standard option Glide 5.5 in Maestro. In silico molecular docking analysis of all the synthesized compounds, AE1 to AE18, showed good docking scores and remarkable interactions with the essential amino acid residues located within the receptor's binding pocket of 6M7H. In comparison to amlodipine, AE12, AE6, AE8, AE11, AE5, AE16, and AE14 exhibit good scores as well as good binding patterns. AE12 exhibits the highest docking score of -8.455 kcal mol?1. Extensive ADMET profiling and structure–activity relationship (SAR) elucidated favorable pharmacokinetic properties and essential structural modifications influencing antihypertensive effectiveness
“MRI Cooling System Analysis & Optimization: CFD, Temperature Control & Efficiency Enhancement”
No full textThis paper presents a compressive analysis and optimization of a twisted heat tube exchanger for MRI cooling system. The objective of this study is to enhance the efficiency and temperature control of the system adhering to ASHRAE standards by altering the coolant inlet temperature from 18° C to 27°C & the hot inlet temperature from 75°C to 100°C. The research encompasses design modifications, thermal analysis of tubes with varying lengths (400mm,800mm,1200mm), CFD Analysis simulation to understand fluid behavior. By employing these analyses & optimizations, we aim to improve the overall performance & efficiency of the MRI cooling system. This work not only contributes to the field of heat exchangers & MRI Cooling but also provides valuable insights for HVAC world by replacement of refrigerant or conventional MRI cooling system