Avoidance of Hidden Terminal & Exposed terminal problem Using Directional MAC Protocol

Khushboo Agarwal,Vikas Sejwar 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.4

The mobile Adhoc network is deployed in the environment where traditional wired network cannot be established due to its required features and their limitation. Use of directional antenna is one of the most promising technique for the high speed wireless network such as IEEE 802.11.Proposed a new directional MAC protocol to address the Directional Hidden terminal problem and Directional Exposed Terminal Problem.

WOLFE TYPE HIGHER ORDER SYMMETRIC DUALITY UNDER INVEXITY

Khushboo Verma,T.R. Gulati 한국전산응용수학회 2014 Journal of applied mathematics & informatics Vol.32 No.1

In this paper, we introduce a pair of higher-order symmetric dual models/problems. Weak, strong and converse duality theorems for this pair are established under the assumption of higher-order invexity. Moreover, self dualitytheorem is also discussed.

Empowerment and subjugation : Re-conceiving commercial surrogacy as work–labor in India

Khushboo Srivastava 이화여자대학교 한국여성연구원 2021 Asian Journal of Women's Studies(AJWS) Vol.27 No.4

Feminist analysis of surrogacy remains caught between calls for abolition on the one hand, and regulation, on the other. Within this dualistic discourse, the question of recognizing commercial gestational surrogacy as a new form of work–labor remains undermined. This paper brings together the abolitionregulation conceptual framework to examine surrogacy as work–labor. Based on ethnographic research conducted in two surrogacy hotspots in India, it illustrates how women understand and construct meaning from their labor as surrogates. In doing so, the study extends the existing feminist framework, using ethnographic research, to open up a space where the labor of surrogacy can be looked upon as both empowering and subjugating at the same time and in differing ways.

Effect on Throughput Due to Changes in Transmission Power of Nodes in MANETs

Khushboo Agarwal,Vikash Sejwar 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.3

Mobile Adhoc network is a unique paradigm, which can be deployed in the environment where traditional wired network cannot be established due to its required features and their limitation. Transmission power is one of the major concern in case of MANETs. In this paper, effect changes in transmission power of the node has been analysed and its impact on network throughput has been investigated. The results achieved by various variations have been used for proposing the possible improvement in the network performance.

Black Carbon Concentration during Spring Season at High Altitude Urban Center in Eastern Himalayan Region of India

Khushboo Sharma,Rakesh Kumar Ranjan,Sargam Lohar,Jayant Sharma,Rajeev Rajak,Aparna Gupta,Amit Prakash,Alok Kumar Pandey 한국대기환경학회 2022 Asian Journal of Atmospheric Environment (AJAE) Vol.16 No.1

This study analyzed the BC associated with PM1 and the contribution of biomass burning to the BC using a portable seven-channel Dual spot Aethalometer in and around Gangtok, the capital city of Sikkim, India, during April 2021. Additionally, CO2 and meteorological parameters (Temperature, Pressure, and Relative Humidity) was measured. The minimum concentration of BC was found in rural areas where the contribution of biomass burning to the BC is highest. The observed spatial variability of BC over Gangtok Municipal Corporation (GMC) area is minimal. Five days back-trajectory analysis was done using the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model to understand the regional influences of air masses at Gangtok. The air mass of the studied region is under influence of trans-regional transport from Indo-Gangetic Plains affecting the BC concentration over the studied region. The black carbon presence in the ambient air near the glacier heights in the Eastern Himalayan region may significantly cause localized warming, thereby enhancing glacier melts. The results have significant bearing for the policy-makers to take corrective steps in addressing the issue of rising BC concentration in high altitude regions. A further detailed study is needed to examine the effect of BC on radiative forcing and its large-scale effect on the East Asian summer monsoon using regional climate models.

WOLFE TYPE HIGHER ORDER SYMMETRIC DUALITY UNDER INVEXITY

Verma, Khushboo,Gulati, T.R. The Korean Society for Computational and Applied M 2014 Journal of applied mathematics & informatics Vol.32 No.1

In this paper, we introduce a pair of higher-order symmetric dual models/problems. Weak, strong and converse duality theorems for this pair are established under the assumption of higher-order invexity. Moreover, self duality theorem is also discussed.

Genomics approach to develop molecular markers for targeted breeding of radish

Ji-Young Lee,Kook Hui Ryu,Jung-Hun Lee,Khushboo Rastogi,Goh Choi 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07

Radish is one of the most widely consumed vegetable crops in Korea. Root is the major part of radish supplied to the market, thus the size, shape, and quality of radish roots are main targets of breeding programs. Despite of the importance of this crop, the molecular breeding of radish is still in the rudimentary stage. In Golden Seed Project, we aim to establish the molecular breeding program of radish using genome-wide approaches. To this end, we selected inbred lines that have distinctive root traits such as yield, shape, disease resistance, and texture. Single nucleotide variation (SNV) among these lines will be identified based on the low coverage genome sequencing data. These SNVs can be used for finding genomic regions associated with root traits from segregating mapping populations which are also in the middle of development. Korean radish roots are harvested after being grown for only nine weeks. During that period, root biomass reaches to more than two kilograms. While investigating the root growth of radish inbred lines, we found that cytokinin contributes as a key growth regulator that promotes radial growth of radish roots. A difference in growth rates of two distinctive inbred lines was explained by the difference in response to cytokinin. Genes responsive to cytokinin are highly enriched in the cambium, the meristematic cell population that drives radial growth. For comprehensive understanding of genes that affect yields of radish roots, we turned to developing a tissue specific transcriptome data using laser capture microdissection. We expect that the compendium of genomics-based data will help establishing molecular breeding of radish at a fast track.

Recurrent carpal tunnel syndrome associated with extension of flexor digitorum muscle bellies into the carpal tunnel: A case series

Rochelle Castillo,Khushboo Sheth,Alan Babigian,Christopher Scola 대한성형외과학회 2018 Archives of Plastic Surgery Vol.45 No.5

While the success or failure of carpal tunnel release ultimately depends on the interplay of a wide array of factors, a broad understanding of the normal anatomy of the carpal tunnel accompanied by awareness of the possible variations of the individual structures that make up its contents is crucial to optimizing surgical outcomes. While anatomic variants such as extension of the flexor digitorum muscle bellies have been described as a cause of primary carpal tunnel syndrome (CTS), there have been no reports depicting its association with recurrent CTS following initially successful carpal tunnel release, a finding with potentially significant prognostic implications that can aid in operative planning. In such cases where muscle extension is identified preoperatively, careful debulking of the muscle belly may be beneficial in improving long-term surgical outcomes.

Isotropic coal tar pitch-based carbon fibers: Effect of nitric acid towards elimination of air-stabilization step

Sonu Rani,Khushboo Kumari,Pankaj Kumar,Shiv Prakash,Kriti Tyagi,Sanjay R. Dhakate,Saroj Kumari 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-

The remarkable properties exhibited by carbon fibers have generated considerable interest in seekingalternative approaches to replace time-consuming, energy-intensive, and multi-step procedures for theirsynthesis. Among the various stages involved in carbon fiber synthesis, the stabilization step plays a crucialrole as it necessitates an extended duration to transform thermoplastic pitch-fibers into thermosettingfibers, thus preventing them from melting during high-temperature treatments. In this study,isotropic coal tar pitch (ICTP) was transformed into pitch fibers through melt-spinning process and subsequentlysubjected to chemical treatment for stabilization using varying concentrations (ranging from5% to 50% v/v) of aqueous nitric acid (HNO3) solutions. The objective was to determine the optimal concentrationfor effective stabilization. Consequently, this research eliminates the conventional, timeconsumingair-stabilization process by treating the pitch fibers with nitric acid prior to carbonization. To produce carbon fibers, all chemically stabilized pitch fibers were directly carbonized at 1000 C. Comprehensive characterizations including Rheology, Elemental analysis, FTIR, TGA, FE-SEM, XRD,Raman, and XPS were conducted to investigate the chemical and structural transformations occurringduring the fiber processing. It was observed that aqueous nitric acid solutions ranging from 15% to30% (v/v) exhibited superior structural, morphological, and mechanical properties compared to otherconcentrations of HNO3.

Performance evaluation of Downlink Non Contiguous Carrier Aggregation in LTE-A

Diksha Duggal,Jyoteesh Malhotra,Khushboo Arora 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.9

Long Term Evolution-Advanced (LTE-A) has brought revolution in the field of wireless communication technology by providing high data rates of up to 1Gbps. One key enhancement feature of LTE-A is bandwidth extension by the use of multi-carrier technology to support deployment bandwidth of up to 100MHz. To achieve such high data rate in IMT-Advanced mobile systems, carrier aggregation technology by 3GPP has been introduced to support very-high-data rate transmissions over wide frequency bandwidth in the new LTE-Advanced standards. This work includes the details of Downlink LTE Advanced System Model and thereby all the performance analysis of Non Contiguous Carrier Aggregation are done and an overview of LTE-Advanced CA scenarios is discussed. Also component carrier parameters and oversampling factor are found and using these parameters power spectrum is plotted. The main outcome from this work is increase in the throughput of the system by increasing the number of carrier components or by increasing bandwidth. Many proposals on carrier aggregation in LTE-A have been published but still there is a need of research to be carried out in this field as this technology has not fully matured.