Truncations of W (infinity) Algebras

We introduce a new class of Vertex Operator Algebras Y+ and their duals, which generalize the standard W-algebras WN of type sl(N). These algebras can be defined in terms of junctions of boundary conditions and interfaces in the GL-twisted N = 4 Super Yang Mills gauge theory. The aim of these technical calculations is to find the relation of these ortho-symplectic Y-algebras to truncations of even W\infinity

Role of Cold Storage in Rooting of Stem Cuttings: A Review

Cold storage is a strategy mainly used for ornamental cuttings for the purpose of prolonging production duration that provide the cuttings with the best condition at the time of planting. The results have been obtained from cold storage of carnations and chrysanthemums confirmed the fact that the herbaceous cuttings could be stored for about two months at not lower than 0 C and more than 4 C, with similar results of the cuttings directly planted without storage. On the other hand, hardwood cuttings are stored at low temperature in order to improve rooting ability via reducing rooting inhibitors that occur in dormant cuttings which were taken during dormant seasons (late fall or early winter). So, declining in rooting inhibitors has been observed in the hardwood cuttings of deciduous trees and Vitis spp which were subjected to low temperature for around 2-6 months. Consequently, rooting was improved in these species. Also, cold storage of cuttings of some coniferous trees increased rooting at a high rate. Other factors like cultivar and storage method may interact with cold storage duration and temperature degree as well. This review article outlines the information of the studies that have been obtained as a result of cold storage of the cuttings of different species

Online Art Gallery

Online art gallery is an e-commerce application which connects artists with their customers, this website will help the artists to showcase their art in this website by helping them to sell it to prospective customers also it will help the customers to discover and search the art which they like and they will have an option to buy the art if they want. There will be three types of user’s roles in the website, the first one is buyer who can search and discover the art without any need to register or login but if they want to buy any art they have to register and login to buy the art and second one is a seller who has to register and login to post their art works for exhibiting and selling on the website and third user is admin who specifies authority and restrictions on the users. There will be a separate console for artist, buyer and administrator. Software Requirements/Tools: Operating System: Windows XP/2010. User Interface: HTML5, CSS3, Bootstrap. Client-side Scripting: JavaScript. IDE/Workbench: NetBeans. Database: MySQL. Modules: Admin Login module. Admin Order Management module. Add Artist information module. Add System user module. Artist Login module. Customer Login Module. Customer Payment Module. Advanced Search module

The Impact of ASYCUDA System Implementation on the Performance of the Sudanese Customs Authority: An Evaluation Study

This study examines the impact of the ASYCUDA system on the performance of the Sudanese Customs Authority. A quantitative research design was used, and data were collected through a questionnaire from 24 customs officials. Descriptive and inferential statistics, including chi-square and paired samples t-test, were used to analyze the data. The results suggest that the ASYCUDA system has positively influenced the performance of the Sudanese Customs Authority, and customs officials are satisfied with its implementation. The study concludes that the ASYCUDA system can enhance the efficiency and effectiveness of the Sudanese Customs Authority and has important implications for policymakers and practitioners in the field of customs management. Keywords:ASYCUDA system, Sudanese Customs Authority, evaluation study, gender, chi-square test, paired samples t-test. DOI: 10.7176/JAAS/82-02 Publication date:July 31st 202

Consumer protection on online transactions in Kurdistan: Lessons from Malaysian law

Recently, the increase in the usage of e-commerce has been one of the most significant developments of business sector. It has transformed many marketplaces to start new opportunities have never been imagined before. Kurdistan is considered as one of the very few regions in the world that are still so far from the real use of inevitable services of e-commerce. Primarily, Kurdistan suffers various features that run as barriers to an effective use of e-commerce, such as inadequate laws to protect consumers electronically, lack of awareness and understanding the benefits of electronic commerce, lack of information and communication technologies (ICT) knowledge and skills, unstable physical network infrastructure, security and other problems related to costs for the adoption of a new technology. This study aims to identify potential issues and problems facing e-commerce in Kurdistan. For this purpose, the study has conducted a comparison between both Malaysian and Kurdish contexts in terms of consumer protection law on online transactions. This study also indicates the intention of Kurdish government to apply Malaysian context into its national laws in terms of e-transactions. As a part of data collection, this study has conducted two versions of formal and informal interviews involved three sets of questions asked each group of selected panelists from governmental and nongovernmental organizations in Kurdistan. The given discussions by this study focused on the technological and law issues that could drive e-commerce in this region. Suggestions were given for better improvement of Kurdish internet laws to provide safe electronic environment and to bring Kurdistan amongst other developing countries to become an active member in the digital economy

Etiology and antibiotic resistance patterns of community-acquired urinary tract infections in J N M C Hospital Aligarh, India

BACKGROUND: Urinary tract infections (UTIs) remain the common infections diagnosed in outpatients as well as hospitalized patients. Current knowledge on antimicrobial susceptibility pattern is essential for appropriate therapy. Extended-Spectrum beta-Lactamase (ESBL) producing bacteria may not be detected by routine disk diffusion susceptibility test, leading to inappropriate use of antibiotics and treatment failure. The aim of this study was to determine the distribution and antibiotic susceptibility patterns of bacterial strains isolated from patients with community acquired urinary tract infections (UTIs) at Aligarh hospital in India as well as identification of ESBL producers in the population of different uropathogens. METHODS: Urinary isolates from symptomatic UTI cases attending to the JN Medical College and hospital at Aligarh were identified by conventional methods. Antimicrobial susceptibility testing was performed by Kirby Bauer's disc diffusion method. Isolates resistant to third generation cephalosporin were tested for ESBL production by double disk synergy test method. RESULTS: Of the 920 tested sample 100 samples showed growth of pathogens among which the most prevalent were E. coli (61%) followed by Klebsiella spp (22%). The majority (66.66%) of the isolates were from female while the remaining were from male. Among the gram-negative enteric bacilli high prevalence of resistance was observed against ampicillin and co-trimoxazole. Most of the isolates were resistant to 4 or more number of antibiotics. Forty two percent of isolates were detected to produce ESBL among which 34.42 % were E. coli isolates. CONCLUSION: This study revealed that E. coli was the predominant bacterial pathogen of community acquired UTIs in Aligarh, India. It also demonstrated an increasing resistance to Co-trimoxazole and production of extended spectrum β-lactamase among UTI pathogens in the community. This study is useful for clinician in order to improve the empiric treatment

Etiology and antibiotic resistance patterns of community-acquired urinary tract infections in J N M C Hospital Aligarh, India

BACKGROUND: Urinary tract infections (UTIs) remain the common infections diagnosed in outpatients as well as hospitalized patients. Current knowledge on antimicrobial susceptibility pattern is essential for appropriate therapy. Extended-Spectrum beta-Lactamase (ESBL) producing bacteria may not be detected by routine disk diffusion susceptibility test, leading to inappropriate use of antibiotics and treatment failure. The aim of this study was to determine the distribution and antibiotic susceptibility patterns of bacterial strains isolated from patients with community acquired urinary tract infections (UTIs) at Aligarh hospital in India as well as identification of ESBL producers in the population of different uropathogens. METHODS: Urinary isolates from symptomatic UTI cases attending to the JN Medical College and hospital at Aligarh were identified by conventional methods. Antimicrobial susceptibility testing was performed by Kirby Bauer's disc diffusion method. Isolates resistant to third generation cephalosporin were tested for ESBL production by double disk synergy test method. RESULTS: Of the 920 tested sample 100 samples showed growth of pathogens among which the most prevalent were E. coli (61%) followed by Klebsiella spp (22%). The majority (66.66%) of the isolates were from female while the remaining were from male. Among the gram-negative enteric bacilli high prevalence of resistance was observed against ampicillin and co-trimoxazole. Most of the isolates were resistant to 4 or more number of antibiotics. Forty two percent of isolates were detected to produce ESBL among which 34.42 % were E. coli isolates. CONCLUSION: This study revealed that E. coli was the predominant bacterial pathogen of community acquired UTIs in Aligarh, India. It also demonstrated an increasing resistance to Co-trimoxazole and production of extended spectrum β-lactamase among UTI pathogens in the community. This study is useful for clinician in order to improve the empiric treatment

Sinteza H-beskonačno regulatora s unaprijednom granom za kompenzaciju histereze kod piezoelektričnih aktuatora

Piezoelectric actuators, widely used in different micro/nanopositioning applications, generally exhibit nonlinear hysteresis characteristics. The compensation of hysteretic behavior of piezoelectric actuators is mandatory for precise micro/nanopositioning. In this paper, nonlinear hysteresis effect is first characterized using the Prandtl-Ishlinskii hysteresis model. The inverse of the Prandtl-Ishlinskii hysteresis model is employed as a feed-forward controller to compensate for hysteresis nonlinearities of the piezoelectric actuator. Slight hysteresis nonlinearity is still observed in the experimental results due to small mismatch between the identified hysteresis model and the measured hysteresis loop. To further enhance the performance of the piezoelectric actuator in terms of mitigation of hysteresis nonlinearity and precise reference tracking, advanced robust full-order as well as fixed-order H-infinity feedback controllers are designed and applied to this actuator in the presence of feed-forward compensator. The experimental results verify the effectiveness of the proposed control scheme in achieving the improved tracking performance with peak-to-peak tracking error of less than 1% for the desired displacement of 12 um with tracking frequency of 10 Hz.Piezoelektrični aktuatori, rasprostranjeni u različitim primjenama mikro/nanopozicioniranja, općenito su izloženi nelinearnim histereznim karakteristikama. Kompenzacija histereznog ponašanja piezoelektričnih aktuatora nužna je za precizno mikro/nanopozicioniranje. Inverzni Prandtl-Ishlinskii histerezni model korišten je za unaprijednu kompenzaciju histereznih nelinearnosti piezoelektričnog aktuatora. Neznatna histerezna nelinearnost još uvijek je vidljiva u eksperimentalnim rezultatima zbog malog neslaganja između identificiranog histereznog modela i mjerene histerezne petlje. Za daljnje poboljšanje performansi piezoelektričnog aktuatora u smislu smanjenja histerezne nelinearnosti i preciznog slijeđenja reference, napredni robusni H-beskonačno regulatori punog i određenog reda sintetizirani su i primijenjeni na ovaj aktuator uz prisutnost unaprijednog kompenzatora. Eksperimentalni rezultati potvrđuju efektivnost predložene upravljačke strukture u postizanju poboljšanih performansi slijeđenja, uz vršnu vrijednost pogreške manju od 1% za ciljani pomak od 12 um s frekvencijom slijeđenja od 10 Hz