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Battery Energy Storage System-Based Stabilizers for Power System Oscillations Damping
Ali, Muhammad Arif Sharafat,Mehmood, Khawaja Khalid,Park, Ji-Kyung,Kim, Chul-Hwan The Korean Institute of IIIuminating and Electrica 2016 조명·전기설비학회논문지 Vol.30 No.10
To ensure secure and reliable operations of power systems, rapid damping of power system oscillations is unavoidable. This paper addresses the improved damping characteristics of a power system by integrating the Energy Storage System (ESS) such as a battery into a Flexible AC Transmission System (FACTS) device named the Battery Energy Storage System (BESS). Design of the BESS-based stabilizers is created to enhance the power system dynamic stability and damping profile. A modified Philips-Heffron model of a Single Machine Infinite Bus bar (SMIB) power system with BESS is established and analyzed. Improved damping characteristics of the power system oscillations are selected as performance criteria for the proposed design. Simulation results show the superior performance of the proposed design as compared to the coordinated design of BESS and conventional Power System Stabilizers (PSS). All the simulations are carried out in MATLAB/ SIMULINK.
Jan, Arif Tasleem,Azam, Mudsser,Choi, Inho,Ali, Arif,Haq, Qazi Mohd. Rizwanul Elsevier 2016 Brazilian journal of microbiology Vol.47 No.1
<P>Mercury, which is ubiquitous and recalcitrant to biodegradation processes, threatens human health by escaping to the environment via various natural and anthropogenic activities. Non-biodegradability of mercury pollutants has necessitated the development and implementation of economic alternatives with promising potential to remove metals from the environment. Enhancement of microbial based remediation strategies through genetic engineering approaches provides one such alternative with a promising future. In this study, bacterial isolates inhabiting polluted sites were screened for tolerance to varying concentrations of mercuric chloride. Following identification, several <I>Pseudomonas</I> and <I>Klebsiella</I> species were found to exhibit the highest tolerance to both organic and inorganic mercury. Screened bacterial isolates were examined for their genetic make-up in terms of the presence of genes (<I>mer</I>P and <I>mer</I>T) involved in the transport of mercury across the membrane either alone or in combination to deal with the toxic mercury. Gene sequence analysis revealed that the <I>mer</I>P gene showed 86–99% homology, while the <I>mer</I>T gene showed >98% homology with previously reported sequences. By exploring the genes involved in imparting metal resistance to bacteria, this study will serve to highlight the credentials that are particularly advantageous for their practical application to remediation of mercury from the environment.</P>
Battery Energy Storage System-Based Stabilizers for Power System Oscillations Damping
Muhammad Arif Sharafat Ali,Khawaja Khalid Mehmood,Ji-Kyung Park,Chul-Hwan Kim 한국조명·전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.10
To ensure secure and reliable operations of power systems, rapid damping of power system oscillations is unavoidable. This paper addresses the improved damping characteristics of a power system by integrating the Energy Storage System (ESS) such as a battery into a Flexible AC Transmission System (FACTS) device named the Battery Energy Storage System (BESS). Design of the BESS-based stabilizers is created to enhance the power system dynamic stability and damping profile. A modified Philips-Heffron model of a Single Machine Infinite Bus bar (SMIB) power system with BESS is established and analyzed. Improved damping characteristics of the power system oscillations are selected as performance criteria for the proposed design. Simulation results show the superior performance of the proposed design as compared to the coordinated design of BESS and conventional Power System Stabilizers (PSS). All the simulations are carried out in MATLAB/SIMULINK.
Ahmad Nawaz,Habib Ali,Muhammad Sufyan,Muhammad Dildar Gogi,Muhammad Jalal Arif,Abid Ali,Muhammad Qasim,Waqar Islam,Noman Ali,Imran Bodla,Madiha Zaynab,Khalid Ali Khan,Hamed A. Ghramh 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.1
The lepidopteran insect pests have significant importance in vegetable production. The present study was performed to investigate the baseline studies about the assessment of feeding and consumption potential, utilization indices and losses promises of leafworm, Spodoptera litura (Fab.) on Okra. The data regarding feeding potential, food utilization and consumption indices as well as losses of different larval instars were recorded and subjected to appropriate statistical analysis. The results showed that, in the beginning, the approximate digestibility of various instars was increase, e.g. third instar (51.36%–64.03%), fourth instar (63.42%–69.45%) and fifth instar (70.25%–76.10%). However, after a certain period, the digestibility was decreased and efficiency to convert the ingested food into biomass varied significantly. The consumption index values increased with an increase in time but the consumption and growth rate was declined of fourth instar larvae. The ingestion and digestion increased of third (10.01–13.06, 8.32–11.91 mg), fourth (11.27–17.28, 10.96–14.03 mg) and fifth (12.60–19.40, 11.93–15.28 mg) larval instars. The corrected weight of consumed leaves increased with a gain in body weight. However, in the third instar, a decline was observed on the last day of feeding. Maximum leaf area was consumed by fifth instar larvae (44.66 cm 2 ) followed by fourth (35.41 cm 2 ) and third (27.98 cm 2 ) instars. In conclusion, all the dependent parameters, including food utilization potential, consumption indices and losses were higher for fifth instar larvae than others. These results emphasized the re-establishment of fundamental (economic threshold level: ETL, economic injury level: EIL) integrated pest management concepts.
Ali Osman, Kaya,Suleyman, Buyukberber,Metin, Ozkan,Necati, Alkis,Alper, Sevinc,Nuriye Yildirim, Ozdemir,Suleyman, Alici,Onur, Esbah,Veli, Berk,Celalettin, Camci,Arife, Ulas,Ugur, Coskun,Mustafa, Benek Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.2
Purpose: To assess the safety and efficacy of a gemcitabine plus docetaxel regimen as a second line therapy for patients with advanced soft tissue sarcoma (STS) resistant to doxorubicin and ifosfamide-based therapy. Patients and Methods: Medical records of 64 patients with advanced STS who received gemcitabine plus docetaxel regimen as a second line treatment between May 2006 and June 2011 were examined. All patients had been previously treated with doxorubicin plus ifosfamide-based regimen at first line setting. Patients received gemcitabine 900 $mg/m^2$ on days one and eight intravenously over 90 minutes, followed by docetaxel 75 $mg/m^2$ on day eight intravenously over one hour. Cycles were repeated every 3 weeks. Results: The male-to-female ratio was 37/27 and the median age was 44 years (range; 19-67 years). Objective responses were observed in 13 (20.3 %) patients (2 CR, 11 PR) and stable disease in 21 (32.8 %). Total clinical benefit (CR+PR+SD) was observed in 34 (53.1 %). Median overall survival (OS) was 18 months (95% confidence interval (CI):12.1-23.9) and Median time to progression (TTP) was 4.8 months (95% CI: 3.6-6). A total of 243 cycles of chemotherapy were administered. The median number of cycle was 3 (range;1-11). The most common grade 3-4 hematologic toxicity was neutropenia (35.9 %). The most common nonhematologic toxicities consisted of nausea/vomiting (37.5 %), mucositis (32.8 %), peripheral neuropathy (29.7%), and fatigue (26 %). There was no toxicity-related death. Conclusion: The combination of gemcitabine plus docetaxel is an active and tolerable regimen as a second line therapy for patients with advanced soft tissue sarcoma who have failed doxorubicin and ifosfamide-based therapy.
Ali HUSSIN,Adnan Maqbool,Rizwan Ahmed Malik,김민수,송태권,김명호,Arif Zaman,김원정 한국물리학회 2015 새물리 Vol.65 No.8
Bi0.5Na0.5TiO3 (BNT) templates with a single phase perovskite structure were produced from a plate-like precursor particles of bismuth-layer-structured ferroelectric Bi4.5Na0.5Ti4O15 (BNT4) through a topochemical microcrystal conversion process. First, the plate-like BNT4 precursor particles were prepared via molten salt synthesis. The layered structure BNT4 transformed into a single phase perovskite BNT templates after its topochemical reaction with the complementary Na2CO3 and TiO2 reactants at 950 ℃ for 4 h in a NaCl flux. The as synthesized BNT templates exhibited large grains (range from 10 to 15 μm), had plate-like morphology and exhibits a single-phase perovskite structure with a pseudo-cubic symmetry. Furthermore, the temperature dependences of dielectric constant and loss at different frequencies showed a relaxor behavior, and polarization versus electric field curves exhibited a typical ferroelectric response.
Biochar soil amendment on alleviation of drought and salt stress in plants: a critical review
Ali, S.,Rizwan, M.,Qayyum, M. F.,Ok, Y. S.,Ibrahim, M.,Riaz, M.,Arif, M. S.,Hafeez, F.,Al-Wabel, M. I.,Shahzad, A. N. Springer Science + Business Media 2017 Environmental Science and Pollution Research Vol.24 No.14
<P>Drought and salt stress negatively affect soil fertility and plant growth. Application of biochar, carbon-rich material developed from combustion of biomass under no or limited oxygen supply, ameliorates the negative effects of drought and salt stress on plants. The biochar application increased the plant growth, biomass, and yield under either drought and/or salt stress and also increased photosynthesis, nutrient uptake, and modified gas exchange characteristics in drought and salt-stressed plants. Under drought stress, biochar increased the water holding capacity of soil and improved the physical and biological properties of soils. Under salt stress, biochar decreased Na+ uptake, while increased K+ uptake by plants. Biochar-mediated increase in salt tolerance of plants is primarily associated with improvement in soil properties, thus increasing plant water status, reduction of Na+ uptake, increasing uptake of minerals, and regulation of stomatal conductance and phytohormones. This review highlights both the potential of biochar in alleviating drought and salt stress in plants and future prospect of the role of biochar under drought and salt stress in plants.</P>