Asad Ali - Academia.edu (original) (raw)

Papers by Asad Ali

The 1st International Conference on Energy, Power and Environment, 2022

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

The authors gratefully acknowledge funding from European Union's Horizon 2020 Research and In... more The authors gratefully acknowledge funding from European Union's Horizon 2020 Research and Innovation programme under the Marie Sklodowska Curie grant agreement No. 813278 (A- WEAR, http://www.a-wear.eu/).

We propose a new static approach to Role-Based Access Control (RBAC) policy enforcement. The stat... more We propose a new static approach to Role-Based Access Control (RBAC) policy enforcement. The static approach we advocate includes a new design methodology, for applications involving RBAC, which integrates the security requirements into the system’s architecture. We apply this new approach to policies restricting calls to methods in Java applications. We present a language to express RBAC policies on calls to methods in Java, a set of design patterns which Java programs must adhere to for the policy to be enforced statically, and a description of the checks made by our static verifier for static enforcement. 1

IEEE Access, 2021

Multi-hop relay networks are deployed to restore communication environment in the catastrophe str... more Multi-hop relay networks are deployed to restore communication environment in the catastrophe stricken area. Deployment of these networks are fast and easy but performance is low due to the relay nature of the networks. Given the surge of bandwidth hungry application, performance such as high data rates, high throughput and ultra-low latency is a concern in traditional one-hop Wireless Local Area Networks (WLANs) as well. Simultaneous transmission over multiple bands is a compendious solution that has the potential to significantly boost data rates and flexibility. It will enhance the network utilization and performance of high-bandwidth applications effectively and efficiently. However, there are certain challenges that need to be addressed before taking full advantage of simultaneous transmission over multiple bands. In this work, we outline the factors affecting the performance such as throughput and end-to-end delay in multiband multi-hop WLANs. Considering these factors, we design an end-to-end traffic scheduling technique that minimizes end-to-end delay and maximizes throughput. We design a mixed integer linear program (MILP) that optimizes end-to-end delay and maximizes throughput. Illustrative numerical results show that proposed technique effectively minimizes end-to-end delay and maximizes throughput. INDEX TERMS Disaster area networks, multiband, multi-hop communication, simultaneous transmission, packet reordering.

2011 World Congress on Internet Security (WorldCIS-2011), 2011

The Common Vulnerability Scoring System (CVSS) is an emerging standard for scoring the impact of ... more The Common Vulnerability Scoring System (CVSS) is an emerging standard for scoring the impact of vulnerabilities. The CVSS base score has been widely adopted by the industry as a framework for exchanging general vulnerability information, while CVSS temporal and environmental scores, which estimate the effect of vulnerabilities within specific environments, is yet to become part of routine IT risk assessment methodologies. To mitigate the effects of vulnerabilities in an environment, a large number of combinations of environmental metric group values can be manipulated. Due to the unavailability of an efficient CVSS tool, identification of the optimum combination for reducing the score to an acceptable level is a daunting task. This paper reports on a software application developed to help to mitigate the risks and study the effects of temporal and environmental metrics on the overall CVSS v2 score. The developed software solution will be released under the Creative Commons Attribut...

Eyes are foremost blessing to enjoy the nature. Blind people face lot of hurdles in daily life. B... more Eyes are foremost blessing to enjoy the nature. Blind people face lot of hurdles in daily life. Blind people needs to depend on others to perform their normal life activities. Information technology brings revolution in every field of life with emerging artificial intelligence, internet of things, wireless sensor networks etc. Internet of Things is evolving technology that digitally interconnect the humans, machines, sensors and everything for automation. It transform manual processes to intelligent automated processes with the help of aritifical intelligence. In this research, we have developed a sensitive smart stick empowered by Interent of Things to support the visually impaired peoples. Smart stick is incorporated with ultrasonic sensor and buzzer to sense and alarm in case of any hurdle. Andorid application is developed with smart stick to generate the important notification and forward to registered numbers along with GPS location. This solution is cost effective and implemen...

Proceedings of the Future Technologies Conference (FTC) 2021, Volume 3, 2021

Medicina, 2021

Background and Objectives: Hyperbaric oxygen is a recognised treatment for a range of medical con... more Background and Objectives: Hyperbaric oxygen is a recognised treatment for a range of medical conditions, including treatment of diabetic foot disease. A number of studies have reported an impact of hyperbaric oxygen treatment on glycaemic control in patients undergoing treatment for diabetic foot disease. There has been no systematic review considering the impact of hyperbaric oxygen on glycaemia in people with diabetes. Materials and Methods: A prospectively PROSPERO-registered (PROSPERO registration: CRD42021255528) systematic review of eligible studies published in English in the PUBMED, MEDLINE, and EMBASE databases, based on the following search terms: hyperbaric oxygen therapy, HBO2, hyperbaric oxygenation, glycaemic control, diabetes, diabetes Mellitus, diabetic, HbA1c. Data extraction to pre-determined piloted data collection form, with individual assessment of bias. Results: In total, 10 eligible publications were identified after screening. Of these, six articles reported...

Frontiers in Chemistry, 2020

Herein, we report a protocol for highly efficient hypervalent iodine (III) mediated, group-assist... more Herein, we report a protocol for highly efficient hypervalent iodine (III) mediated, group-assisted purification (GAP) method for the regioselectivities and stereoselective aminochlorination of electron-deficient olefins. A series of vicinal chloramines with multifunctionalities were acquired in moderate to excellent yields (45-94%), by merely mixing the GAP auxiliary-anchored substrates with dichloramine T and tosylamide as chlorine/nitrogen sources and iodobenzene diacetate as a catalyst. The vicinal chloramines were obtained without any column chromatographic purification and recrystallization simply by washing the reaction mixture with a minimum amount of common inexpensive solvents and thus avoiding wastage of silica, solvents, time, and labor. The GAP auxiliary is recyclable and reusable. This strategy is easy to handle, cost-effective, greener, sustainable, environmentally benign, and mostly suitable for the syntheses of vicinal haloamines from various electron-deficient alkenes.

Energies, 2021

The working capability of multi-stage pumps, such as electrical submersible pumps (ESPs) handling... more The working capability of multi-stage pumps, such as electrical submersible pumps (ESPs) handling multiphase flow, has always been a big challenge for petroleum industries. The major problem is associated with the agglomeration of gas bubbles inside ESP-impellers, causing pump performance degradation ranging from mild to severe deterioration (surging/gas pockets). Previous literature showed that the two-phase performance of ESPs is greatly affected by gas involvement, rotational speed, bubble size, and fluid viscosity. Thus, it is necessary to understand which parameter is actually accountable for performance degradation and different flow patterns in ESP, and how it can be controlled. The present study is mainly focused on (1) the main parameters that impede two-phase performance of different ESPs; (2) comparison of existing empirical models (established for two-phase performance prediction and surging initiation) with our single-stage centrifugal pump results to determine their va...

IEEE Wireless Communications Letters, 2021

Journal of Independent Studies and Research - Computing, 2015

Graph Partitioning is one of the favorite research topics among researchers since the 70s. It att... more Graph Partitioning is one of the favorite research topics among researchers since the 70s. It attracts a diverse group of researchers from various fields such as engineering, science and mathematics. In the last decade, the graphs have increased in size to billions of vertices. Despite the fact that storage devices have become cheaper, processing these huge spanning graphs is not possible for a single machine. This call for the need of partitioning the graph so a group of machines can perform various parallel calculations on them which would save time and produce quick results. The research problem is that the ratio of boundary vertices to interior vertices increases with the increase in number of partitions for existing partitioning techniques available. To address this issue, the random edge selection method of Graph Lab algorithm was replaced with four suggested edge sorting techniques. The results were compared with the random edge selection method of Graph Lab using various performance parameters.

The Electronic Journal of Combinatorics, 1996

Connected graphs with minimum degree delta\deltadelta and at least 2delta+12\delta + 12delta+1 vertices have paths with... more Connected graphs with minimum degree delta\deltadelta and at least 2delta+12\delta + 12delta+1 vertices have paths with at least 2delta+12\delta + 12delta+1 vertices. We provide a characterization of all such graphs which have no longer paths.

ICASSP '79. IEEE International Conference on Acoustics, Speech, and Signal Processing

In this paper, new structures are proposed for the realization of two-dimensional (2-D) stable re... more In this paper, new structures are proposed for the realization of two-dimensional (2-D) stable recursive filters. Such structures are derived from 1-D analog doubly-terminated LC ladder networks by first creating a suitable 2-D analog ladder structure using the method outlined in (1), and then utilizing the linear transformation technique to derive the corresponding 2-D structures. In doing so, the resulting structures are not only ensured to be recursively stable, but they also enjoy very low sensitivity to variations in multiplier coefficient values, and their round-off noise is expected to be low. The technique of linear transformations is applied to the design of low sensitivity active filter structures, and one particular scheme leading to an economical realization is outlined. Examples are included to illustrate the excellent low sensitivity of the derived structures.

Journal of Independent Studies and Research - Computing, 2017

With the development of wireless communications, several studies have been performed on Location ... more With the development of wireless communications, several studies have been performed on Location based Services due to their numerous applications. Amongst those recommendations, Travel Planning and Recommendations are few of the active topics. When it comes to movement patterns and mobility, human beings are restricted in motion due to social, financial and geographical constraints. Using check-in data from a former location based social network namely Gowalla and airport flights and route data from openflights.org, authors aim to extract a graph model from time series data of user check-ins. In this study, authors have identified patterns of location (latitude, longitude) visits using directed weighted graph. In addition to it, we have mapped airports to identified maps using latitude, longitude and used routes. This has helped to identify nearest airport routes probably used by Gowalla users. Hence, by mapping two heterogeneous graphs i.e. the Gowalla check-in data and openflights.org airport and flights data, we have tried to extract the most commonly used airport routes travelled by Gowalla users.

International Journal of Biosciences (IJB), 2016

Climate is changing universally, however it is severely affecting the arid areas of the World in ... more Climate is changing universally, however it is severely affecting the arid areas of the World in particular. Highlands of Balochistan, Pakistan are also under this threat where underground water has gone down to a drastic level due low rain falls and water mining. To overcome these issues there is a need of alternative approach i.e. Cultivation of high value low delta crops like grapes, olives, pistachio and pomegranate instead of low value high delta crops apple, apricot, cherries and peaches etc. For speeding-up the cultivation of high value low delta crops access to their true to type, disease free nursey plants are very important, which have been addressed in this experiment by developing nursery plants of grapes germplasm, under hydroponics system with semi controlled conditions and supplementation of IBA in the media. The aim of this research was to standardize the protocol for rooting of grapes in hydroponics and to find the optimized concentration of IBA for rooting of grape. Two local germplasm i.e. Haita and Sahibi and two exotic genotypes i.e. Autumn Royal and Red globe of grapes were planted in soil, static hydroponics and continuous hydroponics systems. Shoot cuttings were treated with different concentrations of Indole Butyric Acid (IBA). The grapes genotypes treated with 4000 mg.l-1of IBA had more number of roots and greater root length in both static and continuous hydroponics after one month compared with those which were treated with low concentrations of IBA. Furthermore, cuttings produced their roots in short span of time i.e. one month in hydroponics system compared with those kept in soil.

A S L E Transactions, 1979

Gel permeation chromatography is shown to be a valuable technique for analysis of the oxidation a... more Gel permeation chromatography is shown to be a valuable technique for analysis of the oxidation and thermal degradation products of various types of esters. Esters potentially useful as synthetic lubricant basestocks, such as tridecyl pelargonate (a mono-ester), di-2-ethylhexyl sebacate (a diester) and trimethylolpropane triheptanoate (a neopentyl polyolester) form products of up to 50 000 molecular weight when oxidized at high

Health For the Millions, 2004

At the outset let us start by asking ourselves a very important and pertinent question i.e. &quot... more At the outset let us start by asking ourselves a very important and pertinent question i.e. "in India even today when we talk of population why is there such an overwhelming concern for "numbers"? No doubt I agree "numbers" are always fascinating and usually carry with them the ring of "so-called" inevitable truth. But unfortunately enough in our country population related numbers have become matters of grave concern and often misinformed public debate. It is a fact that in the last five decades Indias population has increased from 36 crores in 1951 (around the time of Independence) to over 102 crores in 2001. The growth in numbers of Indias population has become a perennial source of worry for everyone - politicians public leaders administrators bureaucrats development planners public health experts demographers social scientists researchers and even to the common man. To be frank there is some sort of a "fear psychosis" about numbers - some kind of a "number phobia". Whenever there is any discussion on population issues it invariably begins with such expressions like: "India has over one billion people" - "it is the second most populous country in the world" - "in near future it will cross China and will become the most populated country in the world" "large population of India is the real reason for high levels of poverty low per capita income and slow economic growth" and it is often stated that an uncontrolled explosion is responsible for holding Indias progress an economic growth and is identified as a significant hindrance for the countrys development. (excerpt)

European Respiratory Journal, Sep 1, 2013

International Journal of Creative Computing, 2016

To explore effects of program-generated music on physiological, metabolic and endocrine responses... more To explore effects of program-generated music on physiological, metabolic and endocrine responses. Five healthy males underwent whole-body calorimetry using a standard protocol on three separate days, with no music on day 1 (D1), and genre-specific music from online computer-generated program on days 2 (D2: random track selection) and 3 (D3: track selection based on subject-inputted mood). Measurements included pulse, blood pressure (BP), and blood samples for serum cortisol. A p-value ≤ 0.05 was considered significant. Compared with D1, overall metabolic rate during D2 and D3 was reduced by 54.7 kcal (p = 0.03) and 70.6kcal (p = 0.01), respectively, and daytime drop in serum cortisol level was lessened by 125 mmol/l (p = 0.02) and 45 mmol/l (p = 0.04), respectively. Acute effects of music on BP were dependent on genre-specific popularity. Computer-generated music reduces overall metabolic rate, influences cortisol diurnal rhythm and has acute effects on physiological responses based on genre-preference.