ABAKA : a novel attribute-based k-anonymous collaborative solution for LBSs

The increasing use of mobile devices, along with advances in telecommunication systems, increased the popularity of Location-Based Services (LBSs). In LBSs, users share their exact location with a potentially untrusted Location-Based Service Provider (LBSP). In such a scenario, user privacy becomes a major con- cern: the knowledge about user location may lead to her identification as well as a continuous tracing of her position. Researchers proposed several approaches to preserve users’ location privacy. They also showed that hiding the location of an LBS user is not enough to guarantee her privacy, i.e., user’s pro- file attributes or background knowledge of an attacker may reveal the user’s identity. In this paper we propose ABAKA, a novel collaborative approach that provides identity privacy for LBS users considering users’ profile attributes. In particular, our solution guarantees p -sensitive k -anonymity for the user that sends an LBS request to the LBSP. ABAKA computes a cloaked area by collaborative multi-hop forwarding of the LBS query, and using Ciphertext-Policy Attribute-Based Encryption (CP-ABE). We ran a thorough set of experiments to evaluate our solution: the results confirm the feasibility and efficiency of our proposal

INHIBITIVE BEHAVIOUR OF GREEN INHIBITOR IN POTABLE WATER DISTRIBUTION SYSTEM

The inhibition effect of amino trimethylene phosphonic acid (ATMP) and zinc ions on the corrosion of carbon steel in potable water distribution system was investigated. The corrosion inhibiting action was studied through weight loss, potentiodynamic polarization and AC impedance spectroscopy techniques. The possibilities of formation of protective complex was examined using UV – visible spectroscopy. The investigations revealed that zinc acts as an excellent synergist in corrosion inhibition. UV – visible spectral study indicates that there will be a possibility of formation of complexes of ATMP and Zn2+ with carbon steel iron. Polarization studies indicate that the new binary system is a mixed inhibitor. Result of the impedance studies shows that a protective film is formed on the metal surface in presence of the inhibitor formulation

केंद्रीय समुद्री मात्स्यिकी अनुसंधान संस्थान का कालीकट अनुसंधान केंद्र

केंद्रीय समुद्री मात्स्यिकी अनुसंधान संस्थान का कालीकट अनुसंधान केंद्

Signature of a silver phase percolation threshold in microscopically phase separated ternary Ge0.15Se0.85-xAgx (0 <= x <= 0.20) glasses

Temperature modulated Alternating Differential Scanning Calorimetric (ADSC) studies show that Se rich Ge0.15Se0.85-xAgx (0 <= x <= 0.20) glasses are microscopically phase separated, containing Ag2Se phases embedded in a Ge0.15Se0.85 backbone. With increasing silver concentration, Ag2Se phase percolates in the Ge-Se matrix, with a well-defined percolation threshold at x = 0.10. A signature of this percolation transition is shown up in the thermal behavior, as the appearance of two exothermic crystallization peaks. Density, molar volume and micro-hardness measurements, undertaken in the present study, also strongly support this view of percolation transition. The super-ionic conduction observed earlier in these glasses at higher silver proportions, is likely to be connected with the silver phase percolation.Comment: 4 pages, 7 figure

Ab-initio computation of neutron-rich oxygen isotopes

We compute the binding energy of neutron-rich oxygen isotopes and employ the coupled-cluster method and chiral nucleon-nucleon interactions at next-to-next-to-next-to-leading order with two different cutoffs. We obtain rather well-converged results in model spaces consisting of up to 21 oscillator shells. For interactions with a momentum cutoff of 500 MeV, we find that 28O is stable with respect to 24O, while calculations with a momentum cutoff of 600 MeV result in a slightly unbound 28O. The theoretical error estimates due to the omission of the three-nucleon forces and the truncation of excitations beyond three-particle-three-hole clusters indicate that the stability of 28O cannot be ruled out from ab-initio calculations, and that three-nucleon forces and continuum effects play the dominant role in deciding this question.Comment: 5 pages + eps, 3 figure

Osteosarcoma: a fluid cytologic diagnosis

Osteosarcoma is the most common malignant bone tumor characterized by the formation of disorganized immature bone or osteoid tissue from mesenchymal tumor cells. It most commonly occurs in the appendicular skeleton involving the metaphysis of long bones. It is the third most common cancer in adolescence with an annual incidence of 5.6 cases per million children under the age of 15 years. Giant cell-rich osteosarcoma (GCRO) is an exceedingly rare histological variant of conventional primary osteosarcoma. It constitutes about 1%-3% of all osteosarcomas. A 20-year-old male presented with the complaints of pain and swelling over the right knee. Examination revealed a tender 15×10×8 cm swelling palpable on the distal femur. Radiological investigations showed features suggesting right femoral osteosarcoma in the meta-epiphyseal region. A core needle biopsy from the lesion was performed and 15 ml of fluid obtained from the biopsy site was sent for cytological examination, which showed features suggestive of osteosarcoma. Biopsy showed features of osteosarcoma probably of giant cell rich type confirming the fluid cytology findings. Cell block preparation also revealed giant cell predominance. Osteosarcoma is a bone tumor found in areas of rapid bone turnover, most commonly the distal femur and proximal tibia of adolescent patients. Cytology plays a vital role in diagnosing bone tumors, being a rapid, easy, and minimally invasive outpatient department procedure. Histopathology, since it gives a complete architectural pattern of tissue, remains the gold standard diagnostic tool

An overview of laparoscopic versus open incisional hernia repair

Background: An incisional hernia is perceived as a morbidity following an abdominal wall operation. Risk factors that increase the chances of developing these hernias are wound infection, male sex, obesity, abdominal distension, underlying disease process and occasionally poor surgical closure. The aim of this study was to compare laparoscopic vs open incisional hernia repair with regard to postoperative pain and nausea, operative time, postoperative complications and length of hospital stay. Methods: We conducted retrospective review of consecutive patients with hernia in department of surgery, Sri Venkateshwaraa Medical College and Hospital, Redhills, Chennai, Tamil Nadu between September 2022 to February 2023 (6 months). We analyzed 140 patients that met the inclusion criteria and their clinical data. The patients were divided into two groups: open incision hernia repair (OI=70) group and laparoscopic hernia repair (LR=70) group. Results: In our study, the mean operative time of 99.64±13.1 min for the laparoscopic repair group was longer than the mean operative time of 74.64±9.14 min for open repair (p =0.264). Hospital stay was not significantly in the laparoscopic group with a mean of 2.4±0.6 days compared with 2.8±1.4 of the open repair group (p=0.0515). Conclusions: Smaller incisional hernias with a transverse diameter &lt;10 cm can be repaired successfully by a laparoscopic approach if a suitably skilled surgeon is available, although an ugly scar may remain on the anterior abdominal wall. Major defects &gt;10 cm was best repaired by an open operation

Clinical profile and outcome of diabetic foot ulcers

Background: Diabetes mellitus is a common metabolic endocrine disorder, once prevalent in developed countries has become the leading ‘global epidemic’. WHO estimated that in the year 2000. Roughly 3% of the total world population had Diabetes. In India around 61million of general population affected in 2011 which may rise to 101 million by 2030. The aim of the study was to study the clinical profile and outcome of diabetic foot ulcers. The clinical profile of 120 patients with diabetic foot ulcer was studied.   Methods: Patients with diabetic foot ulcer of both genders with age above 30 years willing to participate were included in the study. All patients were subjected to routine diabetic work up with Doppler study and X-ray foot to rule out bone involvement. Results: The majority of patients with diabetic foot ulcers were of age group 51 to 60 years, male predominant, 84 patients out of 120 isolated included for study, 24 (28.6%) isolates had Klebsiella, 46(54.8%) isolates Pseudomonas, 14 (16.7%) isolates has E.coli. Conclusions: Our study gives important information that diabetic foot ulcer is more common among middle-aged people with male predominance which gives the importance of screening diabetic patients for neuropathy and peripheral vascular disease

Design and development of dehusker suitable for fresh arecanut

Arecanut is primarily cultivated for obtaining kernel from its fruit which is chewed in the tender, ripe or processed from. Manual dehusking of arecanut is a slow and tedious process and needs skilled labour. Frequently, due to lack of skilled labour all the fresh areca nuts could not be dehusked immediately. Hence to overcome this problem, farmers are in need of a dehusker for freshly harvested arecanut. Hence, development of suitable unit for dehusking fresh arecanut was contemplated. The physical and mechanical properties of green arecanut and kernel as well as husk were studied. Similarly the effect of compression on the failure of husk and kernel was studied. The husk failed at 0.28 kN of axial loading and the husk and nut failed at 0.36 kN of radial loading. A prototype model which can be operated either manually or by 1.5 kW electric motor was developed with two different types of blades i.e., saw tooth circumferential blades and longitudinal profiled blades. By manual operation the dehusking efficiency were 42 per cent and 63 per cent, respectively for saw tooth and profiled tooth drums. When the dehusker was operated by electric motor the performance was satisfactory with profiled tooth drum. The dehusking efficiency was 82 per cent, damage to kernel was 18 per cent and the capacity was 48 kg of kernel per hour