Conservative management against arthroscopic Bankart repair for first-time anterior shoulder instability

Hashem Bukhary,Jae Chul Yoo,Jong Hun Park,Su Cheol Kim 대한견주관절의학회 2022 대한견주관절학회 학술대회논문집 Vol.2022 No.4

Investigating loading rate and fibre densities influence on SRG - concrete bond behaviour

Hashem Jahangir,Mohammad Reza Esfahani 국제구조공학회 2020 Steel and Composite Structures, An International J Vol.34 No.6

This work features the outcomes of an empirical investigation into the characteristics of steel reinforced grout (SRG) composite - concrete interfaces. The parameters varied were loading rate, densities of steel fibres and types of load displacement responses or measurements (slip and machine grips). The following observations and results were derived from standard single-lap shear tests. Interfacial debonding of SRG - concrete joints is a function of both fracture of matrix along the bond interface and slippage of fibre. A change in the loading rate results in a variation in peak load (Pmax) and the correlative stress (σmax), slip and machine grips readings at measured peak load. Further analysis of load responses revealed that the behaviour of load responses is shaped by loading rate, fibre density as well as load response measurement variable. Notably, the out-of-plane displacement at peak load increased with increments in load rates and were independent of specimen fibre densities.

Factors Predicting the Physical Activity Behavior of Female Adolescents: A Test of the Health Promotion Model

Hashem Mohamadian,Mohammad Ghannaee Arani 대한예방의학회 2014 예방의학회지 Vol.47 No.1

Objectives: Physical activity behavior begins to decline during adolescence and continues to decrease throughout young adulthood. This study aims to explain factors that influence physical activity behavior in a sample of female adolescents using a health promotion model framework. Methods: This cross-sectional survey was used to explore physical activity behavior among a sample of female adolescents. Participants completed measures of physical activity, perceived self-efficacy, self-esteem, social support, perceived barriers, and perceived affect. Interactions among the variables were examined using path analysis within a covariance modeling framework. Results: The final model accounted for an R2 value of 0.52 for physical activity and offered a good model-data fit. The results indicated that physical activity was predicted by self-esteem (β=0.46, p<0.001), perceived self-efficacy (β=0.40, p<0.001), social support (β=0.24, p<0.001), perceived barriers (β=-0.19, p<0.001), and perceived affect (β=0.17, p<0.001). Conclusions: The findings of this study showed that the health promotion model was useful to predict physical activity behavior among the Iranian female adolescents. Information related to the predictors of physical activity behavior will help researchers plan more tailored culturally relevant health promotion interventions for this population.

Embryotoxic and Teratogenic Effects of Tartrazine in Rats

Hashem, Mohamed Mohammed,Abd-Elhakim, Yasmina Mohammed,Abo-EL-Sooud, Khaled,Eleiwa, Mona M.E. Korean Society of ToxicologyKorea Environmental Mu 2019 Toxicological Research Vol.35 No.1

Tartrazine (TAZ) is one of the most commonly used artificial dyes for foods and drugs. We determined the effect of TAZ on fetal development by examining morphological, visceral, and skeletal malformations in rat fetuses following daily oral administration of TAZ to pregnant Wistar rats at the 6th-15th day of gestation. TAZ at 0.45 and 4.5 mg/kg induced 6.0 and 7.1% fetal resorptions, as well as 10.0 and 10.5% fetal mortality, respectively. Fetal body weight and length were significantly lower in the groups treated with TAZ at 0.45 ($3.97{\pm}0.21g$ and $27.3{\pm}0.54mm$, respectively) and 4.5 mg/kg ($3.48{\pm}0.15g$ and $23.22{\pm}1.02mm$, respectively) than in the control group ($4.0{\pm}0.15g$ and $30.01{\pm}0.42mm$, respectively). TAZ at 0.45 and 4.5 mg/kg induced hepatic damage (20 and 33.3%, respectively), dark brown pigmentation due to hemosiderin in the splenic parenchyma (16.7 and 21.7%, respectively), as well as destructed and necrotic renal tubules (16.7 and 26.7%, respectively) in the fetuses. Moreover, TAZ at 0.45 and 4.5 mg/kg caused one or more missing coccygeal vertebrae (20 and 40%, respectively), missing sternebrae (6 and 10%, respectively), missing hind limbs (24 and 4%, respectively), and irregular ribs (16 and 20, respectively) in the fetuses. We concluded that TAZ has embryotoxic and teratogenic potentials in rats.

Effect of gas detonation on response of circular plate- experimental and theoretical

Hashem Babaei,Tohid Mirzababaie Mostofi,Seyed Hamidreza Sadraei 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.56 No.4

A series of experimental results on thin mild steel plates clamped at the boundary subjected to gas detonation shock loading are presented. Detonation occurred by mixing Acetylene (C2H2)-Oxygen (O2) in various volume ratio and different initial pressure. The applied impulse is varied to give deformation in the range from 6 mm to 35 mm. Analytical modeling using energy method was also performed. Dependent material properties, as well as strain rate sensitivity, are included in the theoretical modeling. Prediction values for midpoint deflections are compared with experimental data. The analytical predictions have good agreement with experimental values. Moreover, it has been shown that the obtained model has much less error compared with those previously proposed in the literature.

Predicting Audit Reports Using Meta-Heuristic Algorithms

Hashem Valipour,Fatemeh Salehi,Mostafa Bahrami 한국유통과학회 2013 유통과학연구 Vol.11 No.6

Purpose - This study aims to predict the audit reports of listed companies on the Tehran Stock Exchange by using meta-heuristic algorithms. Research design, data, methodology - This applied research aims to predict auditors reports’ using meta-heuristic methods (i.e., neural networks,the ANFIS, and a genetic algorithm). The sample includes all firms listed on the Tehran Stock Exchange. The research covers the seven years between 2005 and 2011. Results - The results show that the ANFIS model using fuzzy clustering and a least-squares back propagation algorithm has the best performance among the tested models, with an error rate of 4% for incorrect predictions and 96% for correct predictions. Conclusion - A decision tree was used with ten independent variables and one dependent variable the less important variables were removed,leaving only those variables with the greatest effect on auditor opinion (i.e., net-profit-to-sales ratio, current ratio, quick ratio, inventory turnover, collection period, and debt coverage ratio).

Bond strength characterization and estimation of steel fibre reinforced polymer - concrete composites

Hashem Jahangir,Danial Rezazadeh Eidgahee,Mohammad Reza Esfahani 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.44 No.6

Composite materials are effective in forming externally bonded reinforcements which find applications related to existing structures repair, attributed to their high strength-to-weight ratio and ease of installation. Among various composites, fibre reinforced polymers (FRP) have somewhat been largely accepted as a commonly utilized composite for such purposes. It is only recently that steel fibres have been considered as additional members of the FRP fibre family, intuitively termed as steel reinforced polymer (SRP). Owing to its low cost and permissibility of fibre bending at sharp corners, SRP is rapidly becoming a viable contender to other FRP systems. This paper investigates the bond behaviour of SRP-concrete joints with different bonded lengths (50, 75, 100, 150 and 300 mm) and widths (15, 30, 40, 50, and 75 mm) using single-lap shear tests. The experimental specimens contain SRP strips with a fixed density of steel fibres (0.472 cords/mm) bonded to the face of concrete prisms. The load responses were obtained and compared in terms of corresponding load and slip boundaries of the constant region and the peak loads. The failure modes of SRP composites are discussed, and the range of effective bonded length is evaluated herein. In the end, a new analytical model was proposed to estimate the SRP-concrete bond strength using a genetic algorithm, which outperforms 22 existing FRP-concrete bond strength models.

Cell cycle analysis and interspecies nuclear transfer of in vitro cultured skin fibroblasts of the Siberian tiger (Panthera tigris Altaica)

Hashem, Md. Abul,Bhandari, Dilip P.,Kang, Sung Keun,Lee, Byeong Chun JOHN WILEY & SONS LTD 2007 Molecular Reproduction and Development Vol.74 No.4

<P>The present study was conducted to examine the effect of cell culture conditions, antioxidants, protease inhibitors (PI), and different levels of dimethylsulfoxide (DMSO) for the promotion of synchronization of different cell cycles of Siberian tiger skin fibroblasts. We also compared the ability of somatic cell nuclei of the Siberian tiger in pig cytoplasts and to support early development after reconstruction. Cell cycle synchronization between nuclear donor and recipient cells is considered to be one of the most crucial factors for successful cloning. Five experiments were performed each with a one-way completely randomized design involving three replicates of all treatments. Least significant difference (LSD) was used to determine variation among treatment groups. Experiment I focused in the effects of cycling, serum starved and fully confluent stages of Siberian tiger cells on different cell cycles. In Experiment II, the effects of different antioxidants like β-Mercaptoethanol (β-ME, 10 µM), cysteine (2 mM), and glutathione (2 mM) were examined after cells were fully confluent without serum starvation for 4 hr. In Experiment III, three PI, namely 6-dimethylaminopurine (6-DMAP, 2 mM), cycloheximide (7.5 µg/ml) and cytochalasin B (7.5 µg/ml) were used in the sane manner as in Experiment II. In Experiment IV, different levels of DMSO at 0%, 0.5%, 1.0%, and 2.5% were tested on different cell cycle stages of Siberian tiger examined by Flowcytometry (FACS). In Experiment I, 67.2% of the Siberian tiger skin fibroblasts reached the G<SUB>0</SUB>/G<SUB>1</SUB> stage (2C DNA content) in fully confluent conditions which was more than the cycling (49.8%) and serum starved (SS) medium (65.5%; P < 0.05). Among the chemically treated group, glutathione (72.6%) and cycloheximide (71.3%) had little bit better results for the synchronization of G<SUB>0</SUB> + G<SUB>1</SUB> phases than serum starved and fully confluent. After nuclear transfer we did not see any significant differences on the development of tiger-porcine reconstructed embryos at cycling, SS and fully confluent. Data indicate that prolonged culture of cells in the absence of serum as well as using different chemicals for this experiment does not imply a shift in the percentage of cells that enter G<SUB>0</SUB>/G<SUB>1</SUB> and that confluency is sufficient to induce quiescence. This finding can be beneficial in nuclear transfer programs in Siberian tiger, because there are negative effects, such as apoptosis associated with serum starvation. Mol. Reprod. Dev. 74: 403–411, 2007. © 2006 Wiley-Liss, Inc.</P>

A new layered manufacturing machine with cutting force analysis in tapered end milling

Hashem Ghariblu,Shahed Abedi 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.8

We introduce a new layered manufacturing machine with its associated geometric cutting force model. This machine is designed to build metal parts and is a modified type of commercial layered object manufacturing (LOM) machine. This apparatus uses tapered end mills with different angles instead of laser to cut the layer edges. The proposed machine needs higher stiffness, because cutting action would regularly create more inaccuracy. Consequently, a new force model is considered that takes into account cutting conditions, cutter geometry and combination of tool-workpiece materials. Then, by force and stress analysis cutting-force induced inaccuracy has been evaluated for different components of the machine. Finally, the effectiveness of the machine and its capability to build functional metal parts with different geometries is clearly shown.

Effect of Essential and Nonessential Amino Acids in North Carolina State University (NCSU)-23 Medium on Development of Porcine In vitro Fertilized Embryos

Hashem, Md. Abul,Bhandari, Dilip P.,Hossein, Mohammad Shamim,Jeong, Yeon Woo,Kim, Sue,Kim, Ji-Hye,Koo, Ok-Jae,Park, Seon Mi,Lee, Eu Gine,Park, Sun Woo,Kang, Sung Keun,Lee, Byeong Chun Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.5

The present study was conducted to examine the effect of different levels of essential and nonessential amino acid in NCSU-23 medium on the in vitro-produced porcine embryo as it develops from the zygote to the blastocyst stage. Four experiments were performed, each with a completely randomized design involving 5 to 8 replications of treatments. In order to know the effect of nonessential amino acids in NCSU-23 medium, 0, 5, 10 and $20{\mu}/ml$ MEM were supplemented there to, (Exp. 1) and the medium was supplemented with same level of essential amino acids (Exp. 2). The combined effect of nonessential (0, 5, 10 and $20{\mu}/ml$ MEM) and essential amino acids (0, 5, 10 and $10{\mu}/ml$ MEM) in NCSU-23 medium (Exp. 3), first 72 h with non-essential amino acids (at 0, 5, 10 and $20{\mu}/ml$ MEM), and last 4 d with essential amino acids with the same level as NEAA (Exp. 4) were examined. The embryo development was monitored and the quality of blastocysts was evaluated by counting the number of total cells and determining the ratio of inner cell mass (ICM) to trophoectoderm (TE) cells. When Eagle's nonessential amino acids (MEM) added to NCSU-23 medium, it significantly increased the likelihood of development to the 2- to 4-cell stage and subsequent blastocyst development. Supplementation of different levels of essential amino acids in the NCSU-23 medium decreased cleavage rate, rate of morula and blastocyst development and the number of ICMs. In the case of the combined effect of essential and nonessential amino acids, better and significant results were found for blastocysts, hatching blastocysts and for ICM numbers which were also dose dependent. With respect to the biphasic effect of nonessential and essential amino acids, nonessential amino acids increased cleavage whereas essential amino acids increased the total cell number. Neither the nonessential nor the essential group of amino acids, on their own, affected blastocyst cell number or the differentiation of cells in the blastocyst. In conclusion, this study determined the role of nonessential and essential amino acids in the culture of the porcine embryo and showed that the embryo requires different levels of amino acids as it develops from the zygote to the blastocyst stage.