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Access control has made a long way from 1960s. With the advent changes of technologies pertaining to location transparency in storage of data, there arises different access control scenarios. Cloud storage, the predominant storage that is being in use currently, also paves way to various access control problems. Though there are various access control mechanisms such as RBAC, ABAC, they are designed on the user’s perspective such as the role held by the user or other attributes assigned to the user. A new access control mechanism called object relationship based access control (RoBAC) has been developed based on the relations held among the users. The policy decision of access control is based on the relationship among the classes followed in the Java programming. Results have shown that this model best suits various scenarios in the cloud environment, and it also shows that the time for making decision either to allow or to deny is reduced compared to the existing system.

Background The diagnosis of temporomandibular disorders (TMDs), specifically TMD myalgia, can be challenging. Although the anatomy of the jaw muscles has been extensively characterized, a structural difference in TMD-myalgia individuals has never been demonstrated. Tendons are a highly specialized tissue with a predominately mechanical function. Collagen fibrils, the main contributor to tendon mechanical properties, begin macroscopic failure at 8% to 10% strain. The characterization of tendon/muscle abnormalities in individuals with chronic, painful TMD myalgia will lay the groundwork for utilizing noninvasive magnetic resonance imaging (MRI) for screening and objective monitoring of patients with TMD myalgia. A structural marker unique to TMD myalgia will aid in its diagnosis and treatment. Objective(s) This study aimed to determine differences in the tendon/muscle volume ratio of the temporalis muscle in patients with TMD myalgia compared with age-/gender-matched controls without facial pain. Study Design This was a retrospective, observational study of the temporalis muscle and tendon on MRI images. The comparison between groups was based on a voxel-based morphometry of anatomic T1-weighted MRI images and analyzed for differences in the tendon/muscle volume ratio. The study included at least 14 patients per group to detect a 5% difference in tendon/muscle volume ratio. An intraclass correlation coefficient was used to evaluate the intrarater test–retest reliability. General linear models were used to test whether the outcome measures (muscle/tendon volume, muscle/tendon T1 signal intensity, tendon/muscle ratio) are different between groups. Results Our pilot data demonstrated similar muscle volumes but significantly smaller tendon volumes and signal intensity when comparing patients with TMD myalgia with healthy controls (P Discussion/Conclusions Preliminary data suggest that chronic TMD myalgia may be associated with structural abnormalities of the temporalis tendon. Should the temporalis tendon/muscle volume ratio prove to be a reliable marker, this metric may be used to evaluate different treatment modalities in a noninvasive manner.

Large-scale polynomial product computations often used in aerospace applications such as satellite image processing and sensor networks data processing always pose considerable challenge when processed on networked computing systems. With non-zero communication and computation time delays of the links and processors on a networked infrastructure, the computation becomes all the more challenging. In this research, we attempt to investigate the use of a divisible load paradigm to design efficient strategies to minimize the overall processing time for performing large-scale polynomial product computations in compute cloud environments. We consider a compute cloud system with the resource allocator distributing the entire load to a set of virtual CPU instances (VCI) and the VCIs propagating back the processed results to resource allocator for postprocessing. We consider heterogeneous networks in our analysis and we derive fundamental recursive equations and a closed-form solution for the load fractions to be assigned to each VCI. Our analysis also attempts to eliminate any redundant VCI-link pairs by carefully considering the overheads associated with load distribution and processing. Finally, we quantify the performance of the strategies via rigorous simulation studies.

The modern libraries are equipped with latest technological developments ranging from digital Archives, repositories, delivery of the net contents and providing seamless global access to the digital information resources. This paper focuses on the importance of library user studies and stresses the required methodological procedures. Keywords: Digital library, ICT, users.

Health science digital library describes the distribution of the digital resources and digital library initiative of the Tamil Nadu Dr. M.G.R. Medical University. It discusses the brief information about the e-resources available in this University. It explains the method of digitization of previous examination question papers of Under Graduate and Post Graduate courses of Medicine. The total number of question papers digitized for all the courses is 17,489 numbers. A total number of 4652 question papers were digitized under the U.G. course (Medical), 3801 for U.G. course (Para Medical), 4678 for the Post Graduate (Medical) course, 1693 for the Post Graduate (Non-Medical), 1377 for Higher Specialties and 1288 Question papers for Diploma courses. Totally around19614 users accessed this e-resource through the University's website from January to December 2007.

This paper proposes the use of electric field sensors to implement "pretouch" for robotic grasping. Weakly electric fish use this perceptual channel, but it has not received much attention in robotics. This paper describes a series of manipulators each of which incorporates electric field sensors in a different fashion. In each case, the paper presents techniques for using the sensors, and experimental data collected. First, a simple dynamic-object avoidance technique is presented. Next, a 1-D alignment task for grasping is described. Then linear and rotary electrode scanning techniques are presented. It is shown that these techniques can distinguish a small object at close range from a large object farther away, a capability that may be important for grasping.

The ability to resolve the spatio-temporal complexity of intracellular O2 distribution is the ‘Holy Grail’ of cellular physiology. In an effort to obtain a non-invasive approach of mapping intracellular O2 tensions, two methods of phosphorescent lifetime imaging microscopy were examined in the current study. These were picosecond time-resolved epiphosphorescence microscopy (single 0.5 µm focused spot) and two-photon confocal laser scanning microscopy with pinhole shifting. Both methods utilized nanoparticle-embedded Ru complex (45 nm diameter) as the phosphorescent probe, excited using pulsed outputs of Ti–sapphire Tsunami lasers (710–1050 nm). The former method used a 1 ps pulse width excitation beam with vertical polarization via a dichroic mirror (610 nm, XF43) and a 20× objective (NA 0.55, Nikon). Transmitted luminescence (1–2 × 104 counts s−1) was collected and time-correlated single photon counted decay times measured. Alternatively, an unmodified Zeiss LSM510 Confocal NLO microscope with 40× objective (NA 1.3) used successively shifted pinhole positions to collect image data from the lagging trail of the raster scan. Images obtained from two-photon excitation of a yeast (Schizosaccharomyces pombe) and a flagellate fish parasite (Spironucleus vortens), electroporated with Ru complex, indicated the intracellular location and magnitude of O2 gradients, thus confirming the feasibility of optical mapping under different external O2 concentrations. Both methods gave similar lifetimes for Ru complex phosphorescence under aerobic and anaerobic gas phases. Estimation of O2 tensions within individual fibroblasts (human dermal fibroblast (HDF)) and mammary adenocarcinoma (MCF-7) cells was possible using epiphosphorescence microscopy. MCF-7 cells showed lower intracellular O2 concentrations than HDF cells, possibly due to higher metabolic rates in the former. Future work should involve construction of higher resolution 3D maps of Ru coordinate complex lifetime distribution in cultured cell lines.

The antitumour activity of the methanolic extract of Glinus lotoides (MGL) has been evaluated against Dalton's ascitic lymphoma (DAL) in Swiss albino mice. A significant enhancement of mean survival time of tumour bearing mice and peritoneal cell count in normal mice was observed with respect to the control group. When these MGL treated animals underwent i.p. inoculation with DAL cells, tumour cell growth was found to be inhibited. After 14 d of inoculation, MGL is able to reverse the changes in the haemotological parameters, protein and packed cellular volume consequent to tumour inoculation.

A 52 year old man with hypertension and diabetes mellitus presented with sudden onset of binocular diplopia on looking to the left side, right facial weakness, and epiphora in the right eye. Ocular motor examination revealed combination of right gaze paresis and right internuclear ophthalmoplegia suggestive of horizontal one-and-a-half syndrome (fig 1A–C). Vertical ocular movements from the primary position were normal (fig 1D, E). In addition, he also had right lower motor neurone facial weakness …

A 60 year old man with hypertension and diabetes mellitus sought neurological consultation for sudden onset of numbness over the left side of body. On examination, he was conscious and had dysarthria. Right lingual paresis was observed on tongue protrusion (fig 1A). The other neurological findings included left lemniscal sensory impairment and mild left haemiparesis without facial involvement (fig 1B). The presence of crossed neurological …

Thalamic disequilibrium syndrome (TDS) refers to unsteady stance and gait resulting from unilateral thalamic lesion. Posterolateral thalamic involvement may result in disequilibrium with minimal motor or sensory deficit.1 However, this entity has received less attention in comparison with thalamic sensory, movement, and ataxic disorders. The transient nature of TDS underscores its importance for the prevention of falls in neurorehabilitation. The current report highlights development of TDS due to right thalamic hemorrhage after thrombolytic therapy for acute myocardial infarction. A 65-year-old man underwent thrombolytic therapy for acute anterior wall myocardial infarction with streptokinase followed by heparin and oral antiplatelet agents. When he tried to move 3 days later, he could not stand or walk unassisted. On assisted standing, he had truncal instability with axial lateropulsion to the left. He also required assistance for sitting up in bed. Neurologically he had normal visual fields, cranial nerve function (especially ocular movements), muscle power, and …

A 3 year old female child, born of consanguineous parentage and full term normal delivery, developed psychomotor regression. When examined one year later, she exhibited no tracking of visual or auditory stimuli and optic fundi revealed mild pallor. She could produce no meaningful speech. She had drooling of saliva from the mouth, bilateral pyramidal signs, and …

The technical feasibility of the proposed microprocessor-based multilingual terminal is apparent. The lower cost of the microprocessor family components makes the system economically viable. The addition and deletion of languages are very flexible. Including any new language requires only the following three steps: (1) assign a unique number to the language, (2) assign to the terminal keys the symbols necessary to generate the characters of the language and (3) develop software routines (preferably microcoded) to generate the characters of the language using the appropriate algorithm indicated and integrate these routines with the rest of the system. Similarly an existing language could be easily removed from the system.

Simplified formulas are developed not only for reducing computing time but also for improving accuracy; closed-form solutions are obtained for certain series forms that converge very slowly; reciprocal relationships between moments at one point and load at other points are carefully examined; method of integrating moment curves is given and example of application of orthotropic plate theory to bridge design is shown.

An analysis of mechanical and thermal stresses for LOFT Gamma Densitometer mounting lugs, bolts and pipe to which the lugs are attached is presented in this paper. The analysis does not include the densitometer of the supporting structure. The mechanical loads under consideration include internal pressure, seismic loads and dynamic loads due to blow down. Thermal transients associated with normal and upset operating conditions have been considered. Appropriate finite element models were constructed for obtaining stresses and deflection analyses due to mechanical loads and thermal transients. Existing computer code of SAPIV modified for Large core Memory (LCM) for CDC 7600 and SAASIII were used for the computation of mechanical and thermal stresses. Procedures to analyze the data obtained from computer analyses for ASME code evaluation are outlined. A stress summary is presented.

In the last few years linguistic approach to picture processing has gained in popularity. A scheme for recognizing handprinted Tamil characters has been developed. In this scheme, the characters are assumed to be composed of line-like elements, called primitives, satisfying certain relational constraints. Labelled graphs are used to describe the structural composition of characters in terms of the primitives and the relational constraints satisfied by them. The recognition procedure consists of converting the input image into a labelled graph representing the input character and computing correlation coefficients with the labelled graphs stored for a set of basic symbols. The algorithm uses topological matching procedure to compute the correlation coefficients and then maximises the correlation coefficient. Some pre-processing techniques are discussed to convert the input image to a labelled graph.