Anuria in a 9-Month-Old Infant Resulting from Ureteral Cystine Stones

Hamdy Aboutaleb 대한비뇨의학회 2011 Investigative and Clinical Urology Vol.52 No.9

Pediatric urolithiasis and calcular anuria in early infancy are rare. Cystine stones may develop in utero or during early infancy. We report the case of a female 9-month-old infant with obstructive anuria resulting from cystine stones in a single functioning unit. She presented to the emergency department owing to the absence of micturition for 3 days. Radiological investigations revealed four left ureteral stones and an atrophic right kidney resulting from a calcular obstruction. Her laboratory values were as follows: serum creatinine 6.7 mg/dl, Na 132 mEq/l, K 6 mg/dl, and hematocrit 32%. An urgent percutaneous nephrostomy tube was inserted into the left side for urinary drainage, and her serum levels of creatinine and K returned to normal within 3 days. A left ureterolithotomy was the final management. Stone analysis revealed pure cystine crystals.

Proposed program for monitoring recent Crustal movement in Korean Peninsula

Hamdy, Ahmed M.,Jo, Bong-Gon Korean Society of Earth and Exploration Geophysici 2002 지구물리 Vol.5 No.4

한반도는 동아시아 활성 경계부의 끝에 위치해있다. 한반도에서의 지진 활동은 이웃나라인 중국과 일본에 비해서 상대적으로 낮은 편이다. 한반도에서의 지진정보에 따르면 한반도는 지진재해로부터 완전히 안전하지는 않다. 게다가, 한반도 주위의 "태평양, 필리핀해, 유라시아, 남중국"같은 구조적 판들의 상대적인 움직임의 결과로 생긴 다양한 구조적 힘에 의해 둘러 싸여져 있다. 현재 남한에는 5개의 정부기관에서 서로의 필요에 따라 설치한 65개의 GPS관측소를 가지고 있다. 한반도에서의 지진피해를 최소화하기 위해 현재, 앞서 언급한 지진관측소 중 몇 개의 관측소로부터의 GPS관측 자료와 한반도 내부와 주변부의 구조적 환경들을 함께 고려하여 근대의 지각운동을 관찰하는 프로그램이 계획되어 왔다. 이 프로그램은 두개의 주요 부분으로 이루어져 있으며, 첫째부분은 주변 국가인 "중국, 일본"과 협력하여 한반도 주위의 지각 변형을 모니터링하기 위한 것인데, 이 부분은 "East Sea Phase and Yellow Sea Phase" 두개의 페이스로 구성되어 있다 이러한 페이스들은 "East Sea Phase and Yellow Sea Phase"에서 각각의 변형 파라미터들을 결정하는데 도움을 줄 것이다. 한편, 이 프로그램의 두번째 부분은 한반도 주요 단층 내부와 주변의 변형 파라미터와 한반도-제주도 간의 상대운동을 결정하기 위해 계획되었다. 이번 연구를 통해서 다양한 지구 역학적 방법의 적용을 위한 신빙성 있는 자료로서 사용되기 위해, 앞서 언급한 관측소에서의 지각운동 중심부에서 기록된 자료의 필요성이 부각되었다. The Korean peninsula is located at the edge of the East Asian active margin. The seismic activity in the Korean Peninsula is relatively low compared with the neighboring countries China and Japan. According to the available Seismic information, the Korean Peninsula is not totally safe from the Earthquake disaster. Moreover, the area is surrounded by varies tectonic forces which is resulted from the relative movements of the surrounding tectonic plates "Pacific, Philippine Sea, Eurasian and South China". Nowadays South Korea has 65 GPS stations belong to 5 governmental organizations "each organization figure out its own GPS stations for different requirements" In order to minimize the seismic hazard in the Korean Peninsula a program for monitoring the recent crustal movement has been designed considering the uses of the available GPS station "some selected stations from the previously mentioned stations" and the tectonic settings in and around the Korean Peninsula. This program is composed of two main parts, the first part to monitor the crustal deformation around the Korean Peninsula with the collaboration of the surrounding countries "China and Japan" this part is composed of two phases "East Sea Phase and Yellow Sea Phase". These phases will be helpful in determining the deformation parameters in the East Sea and the Yellow Sea respectively While the Second part of this program, is designed to determine the deformation parameters id and around the main faults in the Korean Peninsula and the relative movement between the Korean Peninsula and the Cheju Island. Through out this study the needs of crustal movement center rose up to collect the data from the previously mentioned stations and Organizations in order to use such reliable data in different geodynamical application.

Generalization of the memory integer model for the analysis of the quasi-static behaviour of polyurethane foams

Hamdi Jmal,Ming Lei Ju,Raphael Dupuis,Evelyne Aubry 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.11

Polyurethane foam is a cellular material characterized by an interesting mechanical spectrum of properties: low density, capacity to absorbthe deformation energy and low stiffness. This spectrum of properties makes polyurethane foam commonly used in many thermal,acoustic and comfort applications. Several models, such as memory, hyper-elastic and pseudo-elastic models have been developed in theliterature to describe the mechanical response of polyurethane foam under quasi-static and dynamic test conditions. The main disadvantageof these models is the dependence of their parameters against the test conditions (strain rate, maximum compression level, etc). Thisaffects the general character of their representativeness to the quasi-static and dynamic behaviours of polyurethane foam. The main goalof this article is to implement reliable mechanical model which is able to provide the quasi-static response of the polyurethane foam underdifferent strain rates and large compressive deformation. The dimensional parameters of our model can be expressed by the productof two independent parts; the first contain only the test conditions and the second define the dimensionless and invariant parameters thatcharacterize the foam material. The developed model has been proposed after several experimental studies allowing the apprehension ofthe quasi-static behaviour (through unidirectional compression tests). The polyurethane foam, under large deformations, exhibits anonlinear elastic behaviour and viscoelastic behaviour. To assess the ability of our model to be a general representation, three industrialpolyurethane foams have been considered.

Synthesis and cation complexation of calix[4]azacrowns and a spirobiscalix[4]azacrown

Hamdi, Abdelwaheb,Noomen, Mohamed Habib,Abidi, Rym,Woo, A. Rim,Cho, Jeong Hwan,Kim, Yang Springer-Verlag 2011 JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHE Vol.71 No.3

Multistage Point and Confidence Interval Estimation of the Shape Parameter of Pareto Distribution

Hamdy, H.I.,Son, M.S.,Gharraph, M.K.,Rashad, A.M. The Korean Statistical Society 2003 Communications for statistical applications and me Vol.10 No.3

This article presents the asymptotic theory of triple sampling procedure as pertain to estimating the shape parameter of Pareto distribution. Both point and confidence interval estimation are considered within the same inference unified framework. We show that this group sampling technique possesses the efficiency of Anscome (1953), Chow and Robbins (1965) purely sequential procedure as well as reduce the number of sampling operations by utilizing Stein (1945) two stages procedure. The analysis reveals that the technique performs excellent as far as the accuracy is concerned. The present problem differs from those considered by many authors, in multistage sampling, in that the final stage sample size and the parameter's estimate become highly correlated and therefore we adopted different approach.

GRADED PRIMITIVE AND INC-EXTENSIONS

Hamdi, Haleh,Sahandi, Parviz Korean Mathematical Society 2018 대한수학회논문집 Vol.33 No.2

It is well-known that quasi-$Pr{\ddot{u}}fer$ domains are characterized as those domains D, such that every extension of D inside its quotient field is a primitive extension and that primitive extensions are characterized in terms of INC-extensions. Let $R={\bigoplus}_{{\alpha}{{\in}}{\Gamma}}$ $R_{\alpha}$ be a graded integral domain graded by an arbitrary torsionless grading monoid ${\Gamma}$ and ${\star}$ be a semistar operation on R. The main purpose of this paper is to give new characterizations of gr-${\star}$-quasi-$Pr{\ddot{u}}fer$ domains in terms of graded primitive and INC-extensions. Applications include new characterizations of UMt-domains.

UPPERS TO ZERO IN POLYNOMIAL RINGS OVER GRADED DOMAINS AND UMt-DOMAINS

Hamdi, Haleh,Sahandi, Parviz Korean Mathematical Society 2018 대한수학회보 Vol.55 No.1

Let $R={\bigoplus}_{{\alpha}{\in}{\Gamma}}\;R_{\alpha}$ be a graded integral domain, H be the set of nonzero homogeneous elements of R, and ${\star}$ be a semistar operation on R. The purpose of this paper is to study the properties of $quasi-Pr{\ddot{u}}fer$ and UMt-domains of graded integral domains. For this reason we study the graded analogue of ${\star}-quasi-Pr{\ddot{u}}fer$ domains called $gr-{\star}-quasi-Pr{\ddot{u}}fer$ domains. We study several ring-theoretic properties of $gr-{\star}-quasi-Pr{\ddot{u}}fer$ domains. As an application we give new characterizations of UMt-domains. In particular it is shown that R is a $gr-t-quasi-Pr{\ddot{u}}fer$ domain if and only if R is a UMt-domain if and only if RP is a $quasi-Pr{\ddot{u}}fer$ domain for each homogeneous maximal t-ideal P of R. We also show that R is a UMt-domain if and only if H is a t-splitting set in R[X] if and only if each prime t-ideal Q in R[X] such that $Q{\cap}H ={\emptyset}$ is a maximal t-ideal.

Reconstruction of an Amputated Glans Penis With a Buccal Mucosal Graft: Case Report of a Novel Technique

Hamdy Aboutaleb 대한비뇨의학회 2014 Investigative and Clinical Urology Vol.55 No.12

Penile amputation is a rare catastrophe and a serious complication of circumcision. Reconstruction of the glans penis may be indicated following amputation. Our reportdiscusses a novel technique for reconfiguration of an amputated glans penis 1 year aftera complicated circumcision. A 2-year-old male infant presented to us with glans penisamputation that had occurred during circumcision 1 year previously. The parents complainedof severe meatal stenosis with disfigurement of the penis. Penis length was 3cm. Complete penile degloving was performed. The distal part of the remaining peniswas prepared by removing fibrous tissue. A buccal mucosal graft was applied to thedistal part of the penis associated with meatotomy. The use of a buccal mucosal graftis a successful and simple procedure with acceptable cosmetic and functional resultsfor late reconfiguration of the glans penis after amputation when penile size is suitable.

Modeling and optimization of hard turning of X38CrMoV5-1 steel with CBN tool: Machining parameters effects on flank wear and surface roughness

Hamdi Aouici,Mohamed Athmane Yallese,Brahim Fnides,Kamel Chaoui,Tarek Mabrouki 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.11

The present study, aims to investigate, under turning conditions of hardened AISI H11 (X38CrMoV5-1), the effects of cutting parameters on flank wear (VB) and surface roughness (Ra) using CBN tool. The machining experiments are conducted based on the response surface methodology (RSM). Combined effects of three cutting parameters, namely cutting speed, feed rate and cutting time on the two performance outputs (i.e. VB and Ra), are explored employing the analysis of variance (ANOVA). Optimal cutting conditions for each performance level are established and the relationship between the variables and the technological parameters is determined using a quadratic regression model. The results show that the flank wear is influenced principally by the cutting time and in the second level by the cutting speed. Also, it is that indicated that the feed rate is the dominant factor affecting workpiece surface roughness.

A New Hotbed for Extremism? Jihadism and Collective Insecurity in the Sahel

Hamdy A. Hassan 서울대학교 통일평화연구원 2020 Asian Journal of Peacebuilding Vol.8 No.2

Several jihadist groups sought a safe haven in the Sahel region following the defeat of Daesh in Syria and Iraq, making it a hotbed of terrorist activities. These groups have relied on crime, amongst other strategies, to survive and expand. Such strategies serve as the groups’ lifeblood and help them forge alliances with local actors. The appeal of radical jihadist discourse capitalizes on human insecurities as manifested in political, environmental, and demographic challenges. This article considers not only the new threats to human security in the Sahel, but also the need for a multidimensional, inclusive, dialogue-based solution. Promoting development and social cohesion centered on human security could achieve better results in the region than resorting to external military intervention.