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A Novel 3-DOF Optical Force Sensor for Wearable Robotic Arm
Shams, Sarmad,Kim, Dong-Su,Choi, Youn-Sung,Han, Chang-Soo 한국정밀공학회 2011 International Journal of Precision Engineering and Vol.12 No.4
This paper presents a novel 3-DOF optical force sensor for the wearable robotic arm. Precise sensing of human motion is still a challenge. As human motion detection sensors are expected to generate the real time data, with simultaneous measurement of multiple degrees of freedom. The optical sensing is considered to be standard for monitoring the human motion. The optical sensor is consists of high speed camera with integrated DSP (Digital Signal Processor). The DSP use to detect the changes in the sequence of frames to calculate the direction and displacement of its motion in a plane. On the other hand optical sensor eliminates the requirement of being in contact with the subject. Hand is the end-effecter of the arm and can be controlled by a 3-DOF (degree of freedom) shoulder, 2-DOF elbow and 2-DOF wrist joint. In this paper we present a new technique to measure the human's hand movement in 3 dimensions translation frame. An intelligent computational method for this sensory system to measure the applied force is also developed. The optical force sensor was calibrated and then several experiments were conducted to check the feasibility of sensory system with the wearable robotic arm.
On a Class of Univalent Functions Defined by Ruscheweyh Derivatives
SHAMS, S.,KULKARNI, S.R.,JAHANGIRI, JAY M. Department of Mathematics 2003 Kyungpook mathematical journal Vol.43 No.4
A new class of univalent functions is defined by making use of the Ruscheweyh derivatives. We provide necessary and sufficient coefficient conditions, extreme points, integral representations, distortion bounds, and radius of starlikeness and convexity for this class.
Shams-Ul-Islam,Hamid Rahman,Waqas Sarwar Abbasi,Uzma Noreen,Aftab Khan 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.12
A numerical study for flow past a square cylinder in a two-dimensional channel with a detached flat plate is investigated in this paper. A flat plate is detached downstream in order to control the flow around and behind the square cylinder. Fluid forces acting on the squarecylinder, wake structure mechanism and vortex shedding frequency are presented systematically for different Reynolds numbers andspacing ratios. Effects of Reynolds numbers upon physical parameters are also studied. Variation of Reynolds number is from 75 to 200,based on the incoming flow velocity and width of cylinder. The lattice Boltzmann method is used for this numerical investigation. In thisstudy, we choose three different spacing ratios namely closely, moderately and widely. Numerical studies show that some physical parameterssignificantly reduced by the detached flat plate for closely spacing ratio. The results which we obtained in this investigation areauthentic in the sense that some other experimental observations by different authors can be deduced from our results.
( Shams Tabrez Khan ),( Rizwan Wahab ),( Javed Ahmad ),( Abdulaziz A. Al-khedhairy ),( Maqsood A. Siddiqui ),( Quaiser Saquib ),( Bahy A. Ali ),( Javed Musarrat ) 한국화학공학회 2015 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.53 No.5
Envisaging the role of Co in theranautics and biomedicine it is immensely important to evaluate its antimicrobial activity. Hence in this study CoO thin nanosheets (CoO-TNs) were synthesized using wet chemical solution method at a very low refluxing temperature (90 oC) and short time (60 min). Scanning electron microscopy of the grown structure revealed microflowers (2~3 μm) composed of thin sheets petals (60~80 nm). The thickness of each individual grown sheet varies from 10~20 nm. Antimicrobial activities of CoO-TNs against two Gram positive bacteria (Micrococcus luteus, and Staphylococcus aureus), and two Gram negative bacteria (Escherichia coli and Pseudomonas aeruginosa) were determined. A 98% and 65% growth inhibition of M. luteus and S. aureus respectively, was observed with 500 μg/ml of CoO-TNs compared to 39 and 34% growth inhibition of E. coli and P. aeruginosa, respectively with the same concentration of CoO-TNs. Hence, synthesized CoO-TNs exhibited antimicrobial activity against Gram negative bacteria and an invariably higher activity against tested Gram positive bacteria. Therefore, synthesized CoO-TNs are less prone to microbial infections.
Shams A.M. Issa,Yasser B. Saddeek,H.O. Tekin,M.I. Sayyed,Khamies saber Shaaban 한국물리학회 2018 Current Applied Physics Vol.18 No.6
Several physical parameters such as the packing density (PD), oxygen molar volume (OMV), oxygen packing density (OPD) and the elastic moduli of the quaternary glass system xPbO-(30-x)SiO2-46.67B2O3-23.33Na2O (x = 0, 5, 10 and 15 mol%) have been evaluated. The elastic moduli were computed according to Makishima-Mackenzie model and Rocherulle model. The values of these moduli have been compared to their experimental values. Moreover, different shielding parameters such as mass attenuation coefficients (MAC), half value layer (HVL), mean free path (MFP), effective atomic numbers (EAN), effective electron densities (EED) and buildup factors have been evaluated using the WinXcom program in the energy range 0.015–15 MeV for the quaternary studied glass system. The MAC values have been compared with MCNPX (version 2.6.0) Monte Carlo code. Besides, mass stopping power (MSP) for proton, alpha and electron as well as the removal cross section for fast neutron (∑R) have been calculated. The results observed that the composition has the highest value of PbO (15 mol %) showed excellent nuclear radiation shielding and elastic properties.
Numerical Investigation of Different Flow Regimes for Square Cylinders in Staggered Configuration
Shams Ul Islam,Ghazala Nazeer,Sehrish Hassan Shigri 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.5
The present numerical investigation deals with the flow across two square cylinders placed in staggered alignment at fixed Reynolds number (Re) of 160 and varying gap spacings (g*) from 0 to 6. Numerical computations are conducted by employing the two-dimensional single-relaxation-time lattice Boltzmann method (SRT-LBM). The complex phenomena of vortex shedding are explored for different g* and outcomes are presented as vorticity snapshots, time-history analysis of drag and lift coefficients (CD and CL) and power spectra analysis of CL. Five flow patterns are observed which are named as: single bluff body flow, quasi periodic flow, chaotic flow, in-phase/anti-phase modulated flow and synchronized flow. The fluid forces are irregular for all flow pattern except for synchronized flow where lift is periodic due to synchronization of flow. It is observed that presence of an upstream cylinder in the near vicinity of downstream cylinder increases the drag at small gap spacing and vice versa.
The Impact of Terrorism on Cycle Times in International Supply Chains
Shams Rahman,Christopher Findlay Jungseok Research Institute of International Logis 2003 JOURNAL OF INTERNATIONAL LOGISTICS AND TRADE Vol.1 No.1
Supply chains in East Asia are being redesigned following the reassessment of the risk of disruption through terrorist attacks. The nature of these risks and of the? costs of the private sector responses is reviewed. The research available suggests the costs incurred are substantial. Government regulation applied to security matters also applies within supply chains. It too has been redesigned in response to the change in the risk of terrorist attacks. Examples of its impacts, and its costs and benefit, are presented. Relevant empirical work remains scarce, but principles for government's role can be identified.
c-KIT Positive Schistosomal Urinary Bladder Carcinomas are Frequent but Lack KIT Gene Mutations
Shams, Tahany M.,Metawea, Mokhtar,Salim, Elsayed I. Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.1
Urinary bladder squamous cell carcinoma (SCC), one of the most common neoplasms in Egypt, is attributed to chronic urinary infection with Schistosoma haematobium (Schistosomiasis). The proto-oncogene c-KIT, encoding a tyrosine kinase receptor and implicated in the development of a number of human malignancies, has not been studied so far in schistosomal urinary bladder SCCs. We therefore determined immunohistochemical (IHC) expression of c-KIT in paraffin sections from 120 radical cystectomies of SCCs originally obtained from the Pathology Department of Suez Canal University (Ismailia, Egypt). Each slide was evaluated for staining intensity where the staining extent of >10% of cells was considered positive. c-KIT overexpression was detected in 78.3% (94/120) of the patients, the staining extents in the tumor cells were 11-50% and >50% in 40 (42.6%) and 54 (57.4%) respectively. The positive cases had 14.9%, 63.8%, 21.3% as weak, moderate and strong intensity respectively. Patients with positive bilharzial ova had significantly higher c-KIT expression than patients without (95.2% vs. 38.9%, P=0.000). Mutation analysis of exons 9-13 was negative in thirty KIT positive cases. The high rate of positivity in SBSCC was one of the striking findings; However, CD117 may be a potential target for site specific immunotherapy to improve the outcome of this tumor.