SNDT Women's University

About: SNDT Women's University is a education organization based out in Mumbai, Maharashtra, India. It is known for research contribution in the topics: Routing protocol & Femtocell. The organization has 252 authors who have published 260 publications receiving 2609 citations. The organization is also known as: Shreemati Nathibai Damodar Thackersey Women's University.

Effect of radio link and network layer parameters on performance of Zolertia Z1 motes based 6LoWPAN

Abstract: Unbeknownst the characteristics of radio link parameters and their effect on network performance it becomes difficult to work around the various constraints in low power lossy networks also known as IPv6 over Low Power Wireless Personal Area Networks (6LoWPAN). Based on thorough experiments carried out on the test bed of real zolertia Z1 motes enabled with contiki operating system, the effect of link and network layer parameters on 6LoWPAN performance is analyzed. The performance of 6LoWPAN depends firstly on link metrics viz; radio signal strength indication (RSSI), packet reception ratio (PRR), packet error rate (PER) and link quality indication (LQI). Secondly on node metrics viz; energy consumption, memory occupancy and thirdly on network level metric viz; routing protocol convergence time, control overhead. It is found that the RPL protocol convergence time depends on both the link metrics RSSI and the channel check rate (CCR). Most importantly the node metric; energy consumption is found to be inversely proportional to the link metric RSSI. It is observed that the energy consumption in radio listening state is higher on an average by the factors of 11.64 and 24.66 than in radio transmitting and processing states respectively.

Holistic health assessment tool for patients on maintenance hemodialysis

Abstract: The recent emphasis on assessment of the psychological status, availability of newer and better methods of interpreting the anthropometric measurements of renal patients on dialysis therapy prompted the authors to develop the "Holistic Health Assessment Tool for dialysis patients (HHAT-D)." A total of 30 subjects (25-65 years), enrolled from dialysis centers in Mumbai were administered the HHAT-D tool to assess anthropometric, biochemical, functional, and psychological status (knowledge, needs, that coping strategies) along with dietary intake. The results showed that majority of the patients (73.3%) were mild to moderately malnourished. A highly significant negative correlation of anthropometric measurements (BMI, lean body mass, mid arm circumference, arm muscle area, bicep skin fold thickness, % usual body weight, and % standard body weight) with the HHAT-D scores (P<0.01) confirmed the validity of the tool in assessing the degree of malnutrition. The poor health status of the patients was further confirmed by the average (40%) to poor (36.6%) flexibility status and poor dietary nutrient intake. Moderate (36.6%) to high (60%) coping effectiveness was recorded in the patients as assessed using the "coping effectiveness inventory." A high degree of interitem correlation (Cronbach's coefficient alpha-test value 0.836) also proved the reliability of the HHAT-D tool. Thus, the HHAT-D was found to be a specific and reliable tool for assessment of holistic health status of patients on maintenance hemodialysis to improve quality of life and facilitate faster recovery.

Adaptive physical layer security using code bank of sequences for CDMA

Abstract: Wireless security is an important concern in todays technological world. Wireless devices are used to access data and private applications. From broadband to Wi-Fi, 3G to LTE Advanced, WiMAX to satellite communication every network demands on-the-air security from attacks. Tapping or Jamming attacks leak the secret data, while Service Disruption Attacks affecting QoS (Quality of Service) are relatively easy to perform. In CDMA, the channel and antenna dependent attacks are quite critical to avoid because of its wide bandwidth usage. The critical exchange of time and frequency parameters makes the physical layer elements vulnerable to security related attacks. In order to enable data security and secrecy, there is need of signal protection at the physical layer of CDMA system. Gold codes, M-sequences, OVSF and De-Bruijn sequences were used individually in wireless systems for scrambling purposes in previous proposals. These codes have their own advantages and disadvantages, when channel bandwidth and noise conditions change. This paper proposes a system which would select scrambling codes from a bank of all these mentioned codes depending upon the Signal to Noise Ratio (SNR) or Channel State Information (CSI). This code bank technique is shown as a highly practical solution in selection of proper code for mitigation of attacks and hence, to provide security at the physical layer of CDMA.

Resource allocation using Genetic Algorithm in Heterogeneous Network

Abstract: In this research work resource allocation for femto cell users (FUEs) formulated using genetic algorithm. Here two tier heterogeneous cellular Network is considered which includes macro cell and femto cell. The resources can also segregate for both the tiers. As macro Base station (MBS) Transmission power is large, hence wider coverage area and more users can be accommodated. Whereas, femtocell is an indoor solution having less transmitted power and small coverage area with limited user admission and guaranteed QoS. Some of the resources of macro cell can be dedicated for FUEs by putting Absolute blank subframe (ABS). It will minimize the intra tier interference between the macro cell and femto cell. As frequency resource is valuable and proper allocation should be done among the users in proportional fair manner for getting better throughput. In this research work along with system model resource allocation using genetic algorithm is derived. The obtained genetic algorithm results are compared with heuristic method (knapsack problem) and it is observed that genetic algorithm provides 42% better performance in comparison to the conventional heuristic method.

Albumin nanoparticles—A versatile and a safe platform for drug delivery applications

Abstract: Nanotechnology is a platform long been used as a delivery system for encapsulating therapeutics and/or imaging compounds that are employed for the prevention, diagnosis, and treatment of various diseases. Among the available potential colloidal drug carrier systems, albumin has emerged as a versatile protein used as a carrier system that has been extensively researched for pharmacokinetics and clinical applications. The albumin-based nanoparticles are particularly interesting as attractive macromolecular carriers that are biodegradable and hold great value in the field of nanomedicine due to being well-tolerated without any side effects, having high drug-loading capacity, and with binding efficiency with many drugs, providing a depot and carrier for many small and large molecules alike. Human serum albumin, the most abundant protein present in the human blood, has been used as a carrier in the landmark nanomedicine product, Abraxane (paclitaxel-albumin nanoparticles), establishing its clinical advantage. This chapter deliberates on the design and synthesis of nanoparticulate drug delivery systems that make use of albumin as a drug carrier system and elaborates on their applications in various therapeutic conditions.