检索结果-南通市图书馆

Selective catalytic reduction of NO by NH3 on cerium modified faujasite zeolite prepared from aluminum scraps and industrial metasilicate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2020年第3期38卷 250-256页

作者： rahma Abid Gerard Delahay Hassib Tounsi Laboratory of Advanced Materials National School of Engineers of SfaxUniversity of SfaxTunisia Institut Charles Gerhardt ENSCM"Advanced Materials for Health and Catalysis"240 Av Professor Emile Jeanbrau34296 MontpellierFrance

This work was devoted to the study of the selective catalytic reduction of NO by NH3 on calcined and hydrothermal treated cerium loaded zeolite *** parent faujasite zeolite Na-F(Si/Al=1.32 and SBET=749 m^2/g) used as support for the preparation of the catalysts was obtained from industrial sodium metasilicate and aluminum *** expected,the NO conversion increases with increasing the percentage of cerium in the structure of the faujasite *** NO conversion into N2 is reached at 400℃at a space velocity of 250 000 h^-*** high conversion is due to the redox shift between Ce^3+/Ce^4+and the strong acid sites related to the rare earth present in the framework that is the key in SCR of NO ***,the highest loaded cerium catalyst retains almost its activity after hydrothermal treatment at 850℃.This higher loading is desirable for both activity and stability provided that two stages of preparation are used to put the Ce ions in the sodalite cages.

关键词： Aluminum scraps Ce-Y NH3-SCR Hydrothermal stability

Improving Video Watermarking through Galois Field GF(2^(4)) Multiplication Tables with Diverse Irreducible Polynomials and Adaptive Techniques

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第1期78卷 1423-1442页

作者： Yasmin Alaa Hassan Abdul Monem S.rahma Department of Computer Science College of ScienceUniversity of BaghdadBaghdadIraq Department of Computer Science College of ScienceAl-Maarif University CollegeAl-AnbarIraq

Video watermarking plays a crucial role in protecting intellectual property rights and ensuring content *** study delves into the integration of Galois Field(GF)multiplication tables,especially GF(2^(4)),and their interaction with distinct irreducible *** primary aim is to enhance watermarking techniques for achieving imperceptibility,robustness,and efficient execution *** research employs scene selection and adaptive thresholding techniques to streamline the watermarking *** selection is used strategically to embed watermarks in the most vital frames of the video,while adaptive thresholding methods ensure that the watermarking process adheres to imperceptibility criteria,maintaining the video's visual ***,careful consideration is given to execution time,crucial in real-world scenarios,to balance efficiency and *** Peak Signal-to-Noise Ratio(PSNR)serves as a pivotal metric to gauge the watermark's imperceptibility and video *** study explores various irreducible polynomials,navigating the trade-offs between computational efficiency and watermark *** parallel,the study pays careful attention to the execution time,a paramount consideration in real-world scenarios,to strike a balance between efficiency and *** comprehensive analysis provides valuable insights into the interplay of GF multiplication tables,diverse irreducible polynomials,scene selection,adaptive thresholding,imperceptibility,and execution *** evaluation of the proposed algorithm's robustness was conducted using PSNR and NC metrics,and it was subjected to assessment under the impact of five distinct attack *** findings contribute to the development of watermarking strategies that balance imperceptibility,robustness,and processing efficiency,enhancing the field's practicality and effectiveness.

关键词： Video watermarking galois field irreducible polynomial multiplication table scene selection adaptive thresholding

Techno-economic analysis of a hybrid renewable energy system integrated with productive activities in an underdeveloped rural region of eastern Indonesia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Clean Energy 2023年第6期7卷 1247-1267页

作者： Alya Nurul Shafira Subhan Petrana rahma Muthia Widodo Wahyu Purwanto Sustainable Energy Systems and Policy Research Cluster Universitas IndonesiaDepok16424Indonesia Chemical Engineering Department Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia Master Program in Energy Systems Engineering Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia

The Southwest Maluku region in eastern Indonesia is considered a frontier,outermost and underdeveloped *** inhabitants live on isolated islands,including the residents of Mahaleta Village,where only 9.4%of the community have limited access to *** study aimed to design an economically feasible hybrid renewable energy(RE)system based on solar and wind energy to integrate with the productive activities of the *** study developed conceptual schemes to meet the demand for electricity from the resi-dential,community,commercial and productive sectors of the *** analysis was performed using a techno-economic *** hybrid system was designed using the HOMER Pro optimization function,and cold-storage and dryer systems were designed to support related productive *** optimized design of the hybrid RE system comprised 271.62 kW of solar photovoltaics,80 kW of wind turbines and a 1-MWh lead-acid *** found that the hybrid RE system would only be economically feasible with a full-grant incentive and an electricity tariff of$0.0808/***,the productive activity schemes were all economically feasible,with a cold-storage cost of$0.035/kg and a drying cost of$0.082/*** the hybrid RE system with productive activities can improve the economic feasibility of the energy system and create more jobs as well as increase income for the local community.

关键词： underdeveloped region hybrid renewable energy system photovoltaics wind turbine Indonesia

Tumor deposits in axillary adipose tissue in patients with breast cancer:Do they matter?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第6期12卷 1045-1049页

作者： Muhammed Mubarak rahma Rashid Shaheera Shakeel Department of Histopathology Sindh Institute of Urology and TransplantationKarachi 74200SindhPakistan

Tumor deposits(TDs)are defined as discrete,irregular clusters of tumor cells lying in the soft tissue adjacent to but separate from the primary tumor,and are usually found in the lymphatic drainage area of the primary *** definition,no residual lymph node structure should be identified in these tumor *** present,TDs are mainly reported in colorectal cancer,with a few reports in gastric *** are very few reports on breast cancer(BC).For TDs,current dominant theories suggest that these are the result of lymph node metastasis of the tumor with complete destruction of the lymph nodes by the tumor *** some pathologists classify a TD as two lymph node metastases for *** pathologists also believe that TDs belong to the category of disseminated ***,regardless of the origin,TDs are an indicator of poor ***,for BC,sentinel lymph node biopsy is generally used at *** radical axillary lymph node dissection should be adopted for BC with TDs in axillary lymph nodes is still *** present commentary of this clinical issue has certain guiding *** is aimed to increase the awareness of the scientific community towards this under-recognized problem in BC pathology.

关键词： Breast cancer Tumor deposits Lymph node metastasis Staging

Techno-economic analysis of green hydrogen production by a floating solar photovoltaic system for industrial decarbonization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Clean Energy 2024年第4期8卷 1-14页

作者： rahma Muthia Anastasia Segari Putri Pramudya Mochamad Rafly Maulana Widodo Wahyu Purwanto Department of Chemical Engineering Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia Sustainable Energy Systems and Policy Research Cluster Universitas IndonesiaDepok16424Indonesia Master Program in Energy Systems Engineering Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia

This study proposes a conceptual design of green hydrogen production via proton exchange membrane electrolysis powered by a floating solar photovoltaic *** system contributes to industrial decarbonization in which hydrogen blending with natural gas is proposed as an approach to smooth the energy *** proposed design addresses the challenge of supplying a continuous flow-rate of green hydrogen,which is typically demanded by industrial end *** study particularly considers a realistic area required for the installation of a floating solar photovoltaic *** enable the green hydrogen production of 7.5 million standard cubic feet per day,the required structure includes the floating solar photovoltaic system and Li-ion batteries with the nominal capacities of 518.4 megawatts and 780.8 *** is equivalent to the requirement for 1524765 photovoltaic modules and 3718 Li-ion *** assessment confirms the technical viability of the proposed concept of green hydrogen production,transportation and *** the present commercialization is hindered by economics due to a high green hydrogen production cost of USD 26.95 per kg,this green hydrogen pathway is expected to be competitive with grey hydrogen produced via coal gasification and via natural gas steam reforming by 2043 and 2047,respectively.

关键词： floating solar photovoltaics gas blending green hydrogen industrial decarbonization lithium-ion battery photon exchange membrane electrolysis

Current debate in the oncologic management of rectal cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2016年第10期8卷 715-724页

作者： Trish Millard Paul R Kunk Erika Ramsdale Osama E rahma Division of Hematology-Oncology Department of MedicineUniversity of Virginia Health System Center for Immuno-Oncology/GI Oncology Dana-Farber Cancer Institute

Despite the considerable amount of research in the field,the management of locally advanced rectal cancer remains a subject to *** date,effective treatment centers on surgical resection with the standard approach of total mesorectal *** therapy and chemotherapy have been incorporated in order to decrease local and systemic *** it is accepted that a multimodality treatment regimen is indicated,there remains significant debate for how best to accomplish this in regards to order,dosing,and choice of *** radiation is the standard of care,yet remains debated with the option for chemoradiation,short course radiation,and even ongoing studies looking at the possibility of leaving radiation out *** was traditionally incorporated in the adjuvant setting,but recent reports suggest the possibility of improved efficacy and tolerance when given *** this review,the major studies in the management of locally advanced rectal cancer will be *** addition,future directions will be considered such as the role of immunotherapy and ongoing trials looking at timing of chemotherapy,inclusion of radiation,and nonoperative management.

关键词： Chemoradiation Immunotherapy Non-operative management Neoadjuvant chemotherapy Rectal cancer

Evolution of human kidney allograft pathology diagnostics through 30 years of the Banff classification process

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Transplantation 2023年第5期13卷 221-238页

作者： Muhammed Mubarak Amber Raza rahma Rashid Shaheera Shakeel Department of Histopathology Sindh Institute of Urology and TransplantationKarachi 74200SindhPakistan Department of Nephrology Sindh Institute of Urology and TransplantationKarachi 74200SindhPakistan

The second half of the previous century witnessed a tremendous rise in the number of clinical kidney transplants *** activity was,however,accompanied by many issues and *** accurate diagnosis and appropriate management of causes of graft dysfunction were and still are,a big *** allograft biopsy played a vital role in addressing the above ***,its interpretation was not standardized for many years until,in 1991,the Banff process was started to fill this ***,regular Banff meetings took place every 2 years for the past 30 *** changes have taken place in the interpretation of kidney allograft biopsies,diagnosis,and classification of rejection and other non-rejection pathologies from the original Banff 93 *** review attempts to summarize those changes for increasing the awareness and understanding of kidney allograft pathology through the eyes of the Banff *** will interest the transplant surgeons,physicians,pathologists,and allied professionals associated with the care of kidney transplant patients.

关键词： Banff process Rejection Kidney allograft biopsy Transplant pathology Review

Correlation of tumor-associated macrophage density and proportion of M2 subtypes with the pathological stage of colorectal cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第5期16卷 1878-1889页

作者： Fouzia Fazal Muhammad Arsalan Khan Sumayya Shawana rahma Rashid Muhammed Mubarak Department of Pathology Jinnah Medical and Dental CollegeKarachi 74800SindhPakistan Department of General Surgery Sindh Institute of Urology&Transplantation(SIUT)Karachi 74200SindhPakistan Department of Pathology Bahria University of Health SciencesKarachi 74400SindhPakistan Department of Pathology SIUTKarachi 74200SindhPakistan

BACKGROUND Colorectal cancer(CRC)is a prevalent global malignancy with complex prognostic ***-associated macrophages(TAMs)have shown paradoxical associations with CRC survival,particularly concerning the M2 *** We aimed to establish a simplified protocol for quantifying M2-like TAMs and explore their correlation with clinicopathological *** A cross-sectional study included histopathological assessment of paraffinembedded tissue blocks obtained from 43 CRC *** CD68 and CD163 immunohistochemistry,we quantified TAMs in tumor stroma and front,focusing on M2 ***,histopathological,and clinical parameters were *** TAM density was significantly higher at the tumor front,with the M2 proportion three times greater in both *** tumor front had a higher M2 proportion,which correlated significantly with advanced tumor stage(P=0.04),pathological nodal involvement(P=0.04),and lymphovascular invasion(LVI,P=0.01).However,no significant association was found between the M2 proportion in the tumor stroma and clinicopathological *** Our study introduces a simplified protocol for quantifying M2-like TAMs in CRC tissue *** demonstrated a significant correlation between an increased M2 proportion at the tumor front and advanced tumor stage,nodal involvement,and *** suggests that M2-like TAMs might serve as potential indicators of disease progression in CRC,warranting further investigation and potential clinical application.

关键词： Colorectal cancer Macrophages Tumor stroma M2 subset Tumor front Tumor stage Lymphovascular invasion Prognosis Tumor-associated macrophages Immunohistochemistry

A Block Cipher Algorithm Based on Magic Square for Secure E-bank Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第10期73卷 1329-1346页

作者： Farah Tawfiq Abdul Hussien Abdul Monem S.rahma Hala Bahjat Abdul Wahab Computer Science Department University of TechnologyBaghdad10011Iraq

Nowadays the E-bank systems witnessed huge growth due to the huge developments in the internet and *** transmitted information represents crucial information that is exposed to various kinds of *** paper presents a new block cipher technique to provide security to the transmitted information between the customers and the ebank *** proposed algorithm consists of 10 rounds,each round involves 5 *** operations involve Add round key,Sub bytes,Zigzag method,convert to vector,and Magic Square of order *** purpose of this algorithm is to make use of the complexity of the Magic Square algorithm,the speed of addition operation,the confusion provided by the zigzag,using these operations with Galois field 28 GF(28),and repeating these operations for several rounds to build fast high secure encryption *** algorithm is designed to provide fast with high complexity and security which is suitable to encrypt the data that is transmitted over the ***,complexity,and The National Institute of Standards and Technology Framework NIST suite tests were *** complexity of the proposed algorithm is=((256)32)r+1∗((256)89)r+1+(256)*** proposed technique gives higher speed and security in the encryption and decryption phases,according to the results of the *** degree of randomness has grown by 31.8 *** to a decrease in the time of encrypting and decrypting,as well as the usage of the central processing unit(CPU),efficiency is *** encryption process throughput is enhanced by 13%,while the decryption process throughput is increased by 11.6 percent with the recommended approach.

关键词： Block cipher magic square order 11 complexity NIST suite zigzag GF(28) MS11