Band Gap Engineering in Zinc Doped Sodium Hexa-titanate

Objectives: In this article Zinc doped Sodium Hexa-titanate ceramic materials were prepared for investigating of optical behaviors. Methods and Analysis: Pure and Zinc doped Sodium Hexa-titanate (Na2Ti6O13) ceramic materials have been synthesized using solid state route method, by adding sodium carbonate and titanium dioxide in a proper ratio and passes through different process. Structure and phase of all synthesized ceramic materials were analyzed using X-ray diffraction, and found single phase and monoclinic structure of pure and zinc doped samples. Morphology of all synthesized materials has been studied using scanning electron microscopy. Absorption spectra of these Hexa-titanate samples have also been recorded. Findings: The Crystalline size of synthesized samples was calculated with Debye-Scherrer equation, as well as the energy band gaps have been calculated using Tauc relation with respect to absorption wavelength. Application: The energy band gap has been reduced by doping ZnO from 3.780eV to 2.779eV. These narrower band gaps can be used in different infrared and thermoelectric sensors.

Transcriptome profiling of brain and lung under Dip2a regulation v1

Karyotype Variations among Date Palm (Phoenix dactylifera L.) Cultivars of Sindh, Pakistan

Phenotypic Reversion of Somaclonal Variants Derived from Inflorescence of Date Palm (Phoenix dactylifera L.) in the Open Field Trials

D palm is an important fruit crop for its high nutritional fruit and useful by-products (Khushk et al., 2009). It is the major food source for human and livestock in arid regions of the world. Its propagation through tissue culture technique has enabled date palm growers to cultivate both native and exotic cultivars at large scale (Abul-Soad and Mahdi, 2010). However, date palm plants produced through this method may exhibit various phenotypic variations in open field depending on type and concentration of plant growth regulator, in vitro subculture cycle number, type of explant and also genotype used. The variations may persist for short time (temporary, epigenetic variations) or remain adhered to the plants forever Abstract | The likelihood and degree of the reversion of somaclonal variations have not been reported for tissue-cultured date palm (Phoenix dactylifera) plants derived from immature inflorescences. In this study, three to four years old field grown tissue cultured date palm plants of cvs. Kashuwari and Gulistan derived from in vitro subculture 1-10 (block I) and 11-25 (block II) in multiplication stage were screened for type and nature of phenotypic abnormalities. Six phenotypic abnormalities were detected: 1) dwarfism, 2) excessive vegetative growth, 3) production of deformed offshoots and twisted inflorescence, 4) abnormal frond growth, 5) low levels of fruit setting and 6) inflorescence absent. Among the six different variant phenotypes, complete reversion of phenotypic abnormalities for the phenotypes of inflorescence absent, low level of fruit setting, production of deformed offshoots, and abnormal frond growth were observed in open field trial plants during the three years’ study period. An overall percentage of all the variations was higher (64.19%) in block II during the first season as compared to block I (2.42%). This study provides a good indicator for the date palm tissue culture industry where in vitro cultures with subculture number <11 cycles in multiplication stage are needed to obtain higher percentage of true-to-type regenerants. Abdul A. Mirani1,2*, Chee H. Teo2, Adel A. Abul-Soad3, Ghulam S. Markhand1, Tahira Jatt1, Amir A. Mirbahar1, Najamuddin Solangi1

Numerical Investigation of Free Convection Heat Transfer from Two-Dimensional Rectangular Enclosure with Discrete Isothermal Heating from Bottom Side

Received: 11 March 2019 Accepted: 5 December 2019 The thermal energy exchange by means of free convection between two sources of heat located in an enclosure with a rectangular shape on the bottom side with sawtooth periodic (repetition) upper wall has been studied numerically. The length of the two isothermal sources was about 20% of the total bottom surface length with a constant power. The impacts of the sawtooth waves and the separation of both heat sources in the heat exchange were analyzed during the numerical simulation. The working fluid was air with Prandtl number (0.72) and Rayleigh numbers that varied from 103 to 105. The finite volume method with SIMPLE algorithm was used to solve the governing partial differential equations (continuity, Navier Stokes and energy equations) and to analyze the flow and temperature fields inside the enclosure. The simulated data revealed that an increase in the distance between two heat sources results in a raise of the mean Nusselt Number for all the ranges of Rayleigh Numbers studied, while an increase in the sawtooth periodic results in a diminishing of the mean Nusselt Number for all the Rayleigh Numbers analyzed.

CIC at SemEval-2019 Task 5: Simple Yet Very Efficient Approach to Hate Speech Detection, Aggressive Behavior Detection, and Target Classification in Twitter

In recent years, the use of social media has in-creased incredibly. Social media permits Inter-net users a friendly platform to express their views and opinions. Along with these nice and distinct communication chances, it also allows bad things like usage of hate speech. Online automatic hate speech detection in various aspects is a significant scientific problem. This paper presents the Instituto Politécnico Nacional (Mexico) approach for the Semeval 2019 Task-5 [Hateval 2019] (Basile et al., 2019) competition for Multilingual Detection of Hate Speech on Twitter. The goal of this paper is to detect (A) Hate speech against immigrants and women, (B) Aggressive behavior and target classification, both for English and Spanish. In the proposed approach, we used a bag of words model with preprocessing (stem-ming and stop words removal). We submitted two different systems with names: (i) CIC-1 and (ii) CIC-2 for Hateval 2019 shared task. We used TF values in the first system and TF-IDF for the second system. The first system, CIC-1 got 2nd rank in subtask B for both English and Spanish languages with EMR score of 0.568 for English and 0.675 for Spanish. The second system, CIC-2 was ranked 4th in sub-task A and 1st in subtask B for Spanish language with a macro-F1 score of 0.727 and EMR score of 0.705 respectively.

Fusobacterium nucleatum: A cause of subacute liver abscesses with extensive fibrosis crossing the diaphragm, mimicking actinomycosis

Fusobacterium nucleatum is a Gram-negative, obligate anaerobic bacterium which predominantly resides within the oral cavity and causes acute abscesses and venous thrombosis, primarily in the head and neck region, but could have unique clinical presentations in different anatomical regions of the body.

A Study on Histogram Moments and their Application to Image Thresholding

Histogram moments have been widely investigated for image thresholding. This paper proposes several novel schemes in this area. In some of the proposals, the idea is simply to match a moment from the original image (calculated from the histogram) to a corresponding moment of the thresholded image. In other proposals, the threshold is the one optimizing a specific moment. Comparative results with Otsu shows the effectiveness of the proposed schemes. 1.Introduction Image thresholding has been widely investigated due to its vital role in many applications and one of the effective methods for image segmentation. Various schemes have been proposed in the literature, a good review can be found in [1]. The histogram plays a crucial role in many of these schemes. In general, the histogram is used as an approximation to the probability density function [2 – 3]. In these cases and their extensions, the threshold is selected as a solution to an optimization problem for some objective function dependent on features extracted from the histogram. The aforementioned schemes can be generalized to multi-level thresholding as in [4]. However, the computational price is too high. An interesting scheme to preserve the moments was proposed by [5]. For binary thresholding, the first three moments of the thresholded image have to be equal to those of the original image. A higher dimensional histogram can be constructed using the local variance [6]. This research proposes few formulations that exploit the use of different moments deducted from the 1D histogram. In general, the optimum threshold(s) are the ones producing a moment match (to that of the original) or the moment attains its optimum value at these threshold(s).

Level of Satisfaction among Farmers Attending Kisan Mela

National Culture, Employee’s Engagement and Employee’s CSR Perceptions in Technology Based Firms of Pakistan