The upper critical magnetic field of holographic superconductor with conformally invariant power-Maxwell electrodynamics

The properties of $(d-1)$-dimensional $s$-wave holographic superconductor in the presence of power-Maxwell field is explored. We study the probe limit in which the scalar and gauge fields do not backreact on the background geometry. Our study is based on the matching of solutions on the boundary and on the horizon at some intermediate point. At first, the case without external magnetic field is considered, and the critical temperature is obtained in terms of the charge density, the dimensionality, and the power-Maxwell exponent. Then, a magnetic field is turned on in the $d$-dimensional bulk which can influence the $(d-1)$-dimensional holographic superconductor at the boundary. The phase behavior of the corresponding holographic superconductor is obtained by computing the upper critical magnetic field in the presence of power-Maxwell electrodynamics, characterized by the power exponent $q$. Interestingly, it is observed that in the presence of magnetic field, the physically acceptable phase behavior of the holographic superconductor is obtained for $q={d}/{4}$, which guaranties the conformal invariance of the power-Maxwell Lagrangian. The case of physical interest in five spacetime dimensions ($d=5$, and $q=5/4$) is considered in detail, and compared with the results obtained for the usual Maxwell electrodynamics $q=1$ in the same dimensions.Comment: 12 pages, 1 table, 5 figure

Indirect Photometric Chromatography of Inorganic and Organic Anions Using Benzoate as an Eluent

For many years the determination of common inorganic and organic anions was hindered by the lack of adequately sensitive analytical techniques. The determination of these anions was laborious and time consuming (e.g. titration, precipitaion, gravimetric analysis etc.). Because of the development of high-performance liquid chromatography, the anion exchange separation of simple inorganic and organic anions is now possible. Now, there are a broad and ever-increasing array of chromatographic methods supplanting these older chemical methods. However, detection is still a problem, but indirect detection provides a practical route for the detection of non-chromophoric inorganic and organic anions. This dissertation describes the technique of Indirect Photometric Chromatography (IPC) for the determination of common inorganic anions and short-chain carboxylic and sulfonic acids. In this study, inverted peaks were observed in an elevated baseline as the transparent sample ions were selectively displaced from the anion exchange column by the UV absorbing mobile phase ion sodium benzoate. A Hamilton PRP-X100 (styrene-divinyl benzene) anion exchange column which possessed a low capacity and a wide working pH range (1-13) was employed. The influence of various mobile phase parameters such as benzoate concentration, pH, and percent organic content was investigated. A 2.0 mM concentration of sodium benzoate provided maximum eluting ability for the separation of common inorganic anions (F-, Cl-, Br-, NO2-, NO3-, and H2PO4- ) within eight minutes with UV detection at 260 nm. At high pH, the competition between hydroxide and benzoate ions in the elution process decreases the detection sensitivity. Multicomponent mixtures of straight-chain alkyl carboxylic and sulfonic acids in the anionic form were also separated upon the addition of acetonitrile to the mobile phase. Combined anion exchange/reversed phase interactions were found to influence the retention of these organic acids. The application of the benzoate eluent with UV detection method to the determination of anions was demonstrated via the analysis of chloride, EDTA and sorbate in a commercial saline solution. The limits of detection for injected chloride and EDTA were 1.5 ppm, while sorbate was detected at 0.5 ppm

Indirect Photometric Chromatography of Inorganic and Organic Anions Using Benzoate as an Eluent

For many years the determination of common inorganic and organic anions was hindered by the lack of adequately sensitive analytical techniques. The determination of these anions was laborious and time consuming (e.g. titration, precipitaion, gravimetric analysis etc.). Because of the development of high-performance liquid chromatography, the anion exchange separation of simple inorganic and organic anions is now possible. Now, there are a broad and ever-increasing array of chromatographic methods supplanting these older chemical methods. However, detection is still a problem, but indirect detection provides a practical route for the detection of non-chromophoric inorganic and organic anions. This dissertation describes the technique of Indirect Photometric Chromatography (IPC) for the determination of common inorganic anions and short-chain carboxylic and sulfonic acids. In this study, inverted peaks were observed in an elevated baseline as the transparent sample ions were selectively displaced from the anion exchange column by the UV absorbing mobile phase ion sodium benzoate. A Hamilton PRP-X100 (styrene-divinyl benzene) anion exchange column which possessed a low capacity and a wide working pH range (1-13) was employed. The influence of various mobile phase parameters such as benzoate concentration, pH, and percent organic content was investigated. A 2.0 mM concentration of sodium benzoate provided maximum eluting ability for the separation of common inorganic anions (F-, Cl-, Br-, NO2-, NO3-, and H2PO4- ) within eight minutes with UV detection at 260 nm. At high pH, the competition between hydroxide and benzoate ions in the elution process decreases the detection sensitivity. Multicomponent mixtures of straight-chain alkyl carboxylic and sulfonic acids in the anionic form were also separated upon the addition of acetonitrile to the mobile phase. Combined anion exchange/reversed phase interactions were found to influence the retention of these organic acids. The application of the benzoate eluent with UV detection method to the determination of anions was demonstrated via the analysis of chloride, EDTA and sorbate in a commercial saline solution. The limits of detection for injected chloride and EDTA were 1.5 ppm, while sorbate was detected at 0.5 ppm

On Systems of Systems Engineering: Online Distance Education Systems Key Challenges

Technology development have affected educational delivery around the world. The utilization and implementation of online learning is rising at a staggering manner. Online Distance learning has become an urgent need recently. The use of distance learning has appeared in the past ten years, the learning has been extended by the technology from classrooms in the schools into online learning. Online Learning adopted in various universities, educational institutions and schools worldwide. Recently, with the emergency situations due to the epidemic of COVID -19, and according to the recommendations by World Health Organization for social distance, most of the educational institutions worldwide tend to utilize the online learning instead of traditional learning. Although the online learning has been implemented years ago, still it faces challenges. The author of this research paper aim to explore the key challenges that reported while implementing Online Distance Education System as Systems of Systems. The author then outlines research agenda that identifies 11 research themes that can be considered as a solution for the current Online Distance Education System implementations challenges

Acceptance of Self-Driving Cars in United Arab Emirates

Transportation industry witnessing a revolution of the emerging of self-driving cars which are autonomous vehicles that drive by itself without human involvement. It is expected that self-driving cars would have powerful feature and would provide a lot of benefits such as reducing traveling time, reducing traffic jams, reducing car accidents and many other benefits. The government of United Arab Emirates adopt technology implementation in all life aspects in the country starting by turning into smart government and then smart education and many other implementations of using technology in different aspects of the country. This adoption of technology positively affected UAE people’s intention toward accepting technology. As UAE government always adopt best technology practices, it is expected that United Arab Emirates would adopt the using of autonomous cars. The aim of this research paper is to investigate UAE people’s intention to turn into using self-driving cars. Researcher aim as well to explore the most common factors that may affect people’s intention to turn into using self-driving cars. This research paper methodology based on quantitative methods for gathering data in which questionnaire developed and sent to people live in United Arab Emirates

Quality of Life in Iranian Patients with Acne

Acne is a chronic inflammatory disease of pilosebaceous units. Although the acne isnot a life threatening disease, studies have revealed that it has significant effect on self-image and quality of life. The purpose of this paper was to investigate the health-related quality of life in patients with acne in an Iranian context. Dermatology Life Quality Index (DLQI) and Cardiff Acne Disability Index (CADI) were used for measuring quality of life, and severity of acne was measured by Global Acne Grading System (GAGS). The mean (±SD) of DLQI and CADI scores was 6.42 (±4.77) and 5.97 (±2.97), respectively. Acne influenced the quality of life in 51.8% of patients from moderate to very much, and the quality of life was affected by the severity of acne (P < 0.01). Since acne has significant effects on patient's quality of life, the management of patients with acne requires more attention to different aspects of quality of life

Infection rate of the Shiroud River fishes with Clinostomum complanatum

Due to the variety of fishes and fisheries resources the Shiroud River is considered as one of the most valuable rivers in the west of Mazandaran Province. Therefore the infection rate of the fishes in the river with parasites was examined in Aquatic Disease laboratory of Mazandaran Fisheries Research Center. Among the observed parasitic infections, we will refer to Clinostomum complanatum, which may cause laryngo-pharyngitis in human. The examined fishes were Cobitis taenia, Capoeta capoeta,Neogobius fluviatilis, Carassius auratus, Albumoides bipunctatus, Chalcalburnus chalcoides, Barbus barbus plebejus, Leuciscus cephalus, Alburnus alburnus. Among the mentioned fishes Capoeta capoeta had the highest rate of infection with Clinostomum complanatum. In the research, Alburnoides bipunctatus and Cobitis taenia were introduced as the new hosts of this parasite

Research culture reduces scientific misconduct [La cultura de investigación reduce la mala conducta científica]

[No abstract available

Dietary administration of vitamin C and Lactobacillus rhamnosus in combination enhanced the growth and innate immune response of the rainbow trout, Oncorhynchus mykiss

The effects of dietary vitamin C and Lactobacillus rhamnosus on immunity and growth performance were investigated in Oncorhynchus mykiss. For this purpose, 480 rainbow trout (68±5g) were obtained from a local farm and acclimated to laboratory conditions for 10 days and then divided into four groups in three replicates. During 30 days, juvenile rainbow trout were fed diets supplemented with vitamin C (1g/kg) and L. rhamnosus (at 5 × 107 CFU/g) or a control diet. Biometry was done at day -30 and blood samples were taken by caudal vein after fish anesthesia with clove powder at day 0, 15, 30 and 45. Serum lysozyme activity, alternative complement activity and total plasma immunoglobulin level were assayed as innate immune response of rainbow trout. Results showed fish fed with vitamin c and L. rhamnosus (group 3) statistically could improve fish growth performance. Also lysozyme activity and alternative complement activity of serum significantly were higher in group three than other groups, but total plasma level of immunoglobulin only was higher than all groups at day 30. In conclusion dietary administration of vitamin C and L. rhamnosus in rainbow trout diet could enhance the growth and innate immune response, but these properties need further studies on the field applications