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Wyświetlanie 1-15 z 66
Tytuł:
Projective synchronization of chaotic systems via backstepping design
Autorzy:
Tarai, A.
Khan, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/266186.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
równanie Lyapunova
projekt
układ dynamiczny
Lyapunov function
projective synchronization
backstepping
design
Opis:
Chaos synchronization of discrete dynamical systems is investigated. An algorithm is proposed for projective synchronization of chaotic 2D Duffing map and chaotic Tinkerbell map. The control law was derived from the Lyapunov stability theory. Numerical simulation results are presented to verify the effectiveness of the proposed algorithm.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 965-973
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular epidemiology and phylogenetic analysis of Tams I gene of Theileria annulata in Khyber Pakhtunkhwa, Pakistan
Autorzy:
Shah, S.S.A.
Saddique, U.
Khan, M.A.
Khan, S.
Powiązania:
https://bibliotekanauki.pl/articles/16647390.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
crossbred cattle
Pakistan
PCR
risk factors
sequencing
theileriosis
Opis:
Theileriosis is a hemoparasitic disease that affects a wide range of different animal species and is caused by various species of Theileria. This study aimed to determine the molecular epidemiology of Theileria annulata through microscopy and PCR, in crossbred cattle in some districts of Khyber Pakhtunkhwa, Pakistan. For this study, a total of 384 blood samples were collected from cattle in the Peshawar (n=120), Charsadda (n=94), Nowshera (n=84), and Swabi (n=86) districts. Microscopy and PCR were used to determine the overall prevalence of theileriosis, which was found to be 15.8 and 22.6%, respectively. Theileria annulata was detected in blood samples through PCR in the study area, and the target gene i.e., Tams 1, of positive samples was sequenced. The sequences in the current study revealed high sequence homology (ranging from 96 to 100%) with Tams 1 sequences of neighboring countries present in the NCBI database. Season, breed, age, and sex were found to be important risk factors among the several risk factors examined, whereas, among different clinical manifestations, lymphadenopathy showed a strong association with theileriosis. According to Cohen’s kappa and ROC analysis, microscopy was proven to be a fair diagnostic test for detecting theileriosis in cattle, and may be used in combination with molecular techniques for screening a large number of animals.
Źródło:
Polish Journal of Veterinary Sciences; 2022, 25, 4; 625-629
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extension of shelf-life of tomato using irradiated chitosan and its physical and biochemical characteristics
Autorzy:
Parvin, N.
Kader, M.A.
Huque, R.
Molla, M.E.
Khan, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/10996.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2018, 67
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Significant Influence of Annealing Temperature and Thickness of Electrode on Energy Conversion Efficiency of Dye Sensitized Solar Cell: Effect of Catalyst
Autorzy:
Uddin, J.
Islam, J. M. M.
Khan, S. M. M.
Hoque, E.
Khan, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/412298.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Dye Sensitized Solar Cell
sensitizer
catalyst
annealing temperature
thickness
Opis:
Dye sensitized solar cell (DSSC) shows great promise as an alternative to conventional p-n junction solar cells due to their low fabrication cost and reasonably high efficiency. DSSC was assembled by using natural dye extracted from red amaranth (Amaranthus Gangeticus) as a sensitizer and different catalysts for counter electrode were applied for maximum energy conversion efficiency. Annealing temperature and thickness of electrode were also investigated and optimized. Catalyst, annealing temperature and thickness were optimized by the determination of cell performance considering photoelectrochemical output and measuring current and voltage; then calculating efficiency and other electrical parameters. The experimental results indicated that samples having 40 μm electrode thickness and prepared at 450 o C annealing temperature showed the best performance.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 20, 1; 78-87
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Upwelling session in Indonesia waters
Autorzy:
Purba, Noir P.
Khan, Alexander M. A.
Powiązania:
https://bibliotekanauki.pl/articles/1076677.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
coastal area
economic exclusive zone
periodic monsoon
satellite data
upwelling
Opis:
The aim of this research was to analyze monthly sea surface temperature (SST) and chlor-a satellite data for 16 years from 2003 in an area from south Java to north Papua. The results show that the temporal and spatial pattern of SST and chlor-a distribution strongly was related to the monsoonal pattern. The upwelling session starts from May and ends in the October, in the south-east monsoon season. The lowest SST (25-30 °C) and the highest chlor-a (2.23 mg/l) is found in August in the south-east monsoon season. In addition, the largest upwelling area occurs in July, and ranges within 790,221 km2 of size.
Źródło:
World News of Natural Sciences; 2019, 25; 72-83
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Properties of Carbon Nanotube (CNT) Reinforced Polyvinyl Alcohol (PVA) Composites
Autorzy:
Hasan, M.
Das, S. K.
Islam, J. M. M.
Gafur, Md. A.
Hoque, E
Khan, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/411675.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
CNT
PVA
composite
Thermal properties
Gum acacia
Opis:
Homogeneous Polyvinyl alcohol (PVA)/Carbon nanotube (CNT) composite has been prepared by solution casting method using gum acacia as a surfactant. CNT content in the composite was varied from 5-10 % by weight. The thermal properties of PVA/CNT composites were investigated by Thermo Gravimetric/Differential Thermal Analyzer (TG/DTA) and Thermo Mechanical Analyzer (TMA). TG/DTA results showed that higher thermal stability in higher percentage of CNT in the composites. The 10 % CNT containing PVA composite exhibit highest onset of melting, glass transition point and offset of melting temperature and the recoded values are 330.4K, 379K and 421.3K respectively. All of the result indicates that the developed PVA/CNT composite might be promising for use in solar cell application.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 12; 59-66
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic Contribution of Southern West Java Province Marine Fisheries
Autorzy:
Rizal, Achmad
Nurruhwati, Isni
Khan, Alexander M. A.
Powiązania:
https://bibliotekanauki.pl/articles/1075704.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Economic
Fisheries
Input-Output
Marine
Southern West Java Province
Opis:
Economic development has negative impacts on the environment and spurs an upward trend of environmental degradation and resource depletion. However, as incomes increase, the structure of the economy may change, shifting from a resource-intensive economy to a serviceand knowledge-based technology-intensive economy. Marine Fisheries development is one of the economic’s sector that contribute on regional economic growth in west java province. This paper present the Input Output Analysis to show economic contribution of Marine fisheries of southern west java province. Total contribution (direct and indirect effect) of marine fisheries in the Southern West Java economy range from 12.7%, 13.1% to 14.6% in terms of value added, employment and production value. The direct economic contribution in 2017 for the first two measures is 5.5% and 7.3%. Recommendation as consequences of this finding are investment should be alocated to fish culture on high value fish species. Concerning investment on marine fisheries resources, it needs increasing financial institution supporting.
Źródło:
World Scientific News; 2019, 119; 204-217
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of Electrically Conductive Nanocrystalline Thin Film for Optoelectronic Applications
Autorzy:
Das, S K.
Islam, J. M. M.
Hasan, M.
Kabir, H.
Gafur, Md. A.
Hoque, E.
Khan, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/412543.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Conductive thin film
Composite
TiO2
Solar cell
Optoelectronics
Sodium alginate
Opis:
Sodium alginate (TiO2) sand composites were prepared by solution casting. Purified sand was added in the composite films to increase electrical conductivity. Electrical properties such as conductivity, capacitance, dielectric constant, and loss tangent of the composites were investigated. The current voltage characteristics for all the composites showed ohmic behavior. All the electrical properties have been found to improve with the incorporation of sand (SiO2) but 6 % sand containing composite exhibits the best electrical properties. The mechanical properties tensile strength (TS), elongation at break (Eb) and Young modulus for 6 % sand containing composite film are found to be 4.445 MPa, 9.76 %, and 72.8 MPa respectively. The experimental results reveal that the blended films exhibit higher stability and improved mechanical properties of both tensile strength and elongation at break in dry state. Water absorption properties of the composites are found to decrease with the increase of sand content. Lowest water uptake properties and highest stability were demonstrated by 6 % sand containing sample. Electrically conductive composite films have useful applications for solar cells and optoelectronics. Thus, this study is very much expected to aid in the design and selection of proper composite for the potential application of solar cell and optoelectronics.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 10, 1; 90-101
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Attributes of Occupational Injury Among Workers in the Chemical Industry and Safety Issues
Autorzy:
Khan, M. M. A.
Halim, Z. I.
Iqbal, M.
Powiązania:
https://bibliotekanauki.pl/articles/90576.pdf
Data publikacji:
2006
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
attribute
occupational injury
workers
chemical industry
safety issues
uraz
przemysł chemiczny
zagrożenia zdrowia
Bangladesz
zagrożenia chemiczne
Opis:
Case-study research was carried out with a view to find the attributes of occupational injury among workers in the chemical industry and to enhance safety issues. Injury data were collected and processed in terms of different variables, such as age, gender, skills, type of hazard, etc. Pareto analysis was then applied to find a pattern of occupational injury among the workers. The study revealed that 79.52% of the injured workers were in the 40–59 age group; 57.14% of accidents occurred during the 1st shift; 73.26% of accidents caused injury to hands, feet, chest to thigh, arms and eyes; and 70.93% of injuries were caused by pumps, carrying and lifting, vehicles, pipelines, valves, and grinding. Surprisingly, no one was injured in the group of temporary workers. The paper also provides specific suggestions followed by some action plans.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2006, 12, 3; 327-341
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between Length and Mouth Opening of Skipjack Tuna (Katsuwonus pelamis) in the Waters of Palabuhanratu Sukabumi Regency
Autorzy:
Ridwan, Monika
Khan, Alexander M. A.
Zahidah, Zahidah
Hamdani, Herman
Powiązania:
https://bibliotekanauki.pl/articles/1031887.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Katsuwonus pelamis
Palabuhanratu waters
correlation value
length-mouth opening relationship
skipjack tuna
Opis:
Skipjack tuna (Katsuwonus pelamis (Linnaeus, 1758)) is one of the main commodities of Palabuhanratu capture fisheries with a percentage of 14% or 422.701 kg of total capture fisheries production in 2017. The purpose of this research is to analyze the correlation between length and mouth opening of skipjack tuna (Katsuwonus Pelamis) in the waters of Palabuhanratu Sukabumi Regency. The sample was collected in June until August 2019 at the Palabuhanratu Fishing Port, Sukabumi Regency. Skipjack tuna observed during the research had a total length range from 250 until 730 mm FL. The pattern of length and opening mouth relationships of skipjack tuna can be seen from the regression and correlation values. The results obtained were collected combined Y = 0.8064x - 0.2283 and R2 = 0.7786. Correlation value of the length and mouth opening relationship of skipjack tuna was 0.88. The level of length-mouth opening relationship of skipjack tuna is highly interrelated.
Źródło:
World News of Natural Sciences; 2020, 30, 2; 220-231
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Fishery Sectors Linkages Toward Other Sectors In Batubara District of North Sumatera Province, Indonesia
Autorzy:
Rizal, Achmad
Pasaribu, R. H. R.
Khan, Alexander M. A.
Powiązania:
https://bibliotekanauki.pl/articles/1076674.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Batubara District
Linkage
fishery
growth
Opis:
This research aims to analyze the growth rate, and the role of the fisheries sector also to analyze the linkage between the fisheries sector and other sectors in the economic growth rate in the Batubara district. The results of research can be used by local communities and the government as material consideration in determining a policy of management of the economic sector, especially the fisheries sector. This research was carried out from April 2017 to April 2018. The methods utilized are regional superiority analysis, klassentypology analysis, and correlation analysis. The results showed that LQ. LI and SI values of the fisheries sector of Batubara District tend to increase in value from year to year and the fisheries sector itself is in a state of growth. Still, Typology Klassen analysis reveals that the fisheries sector of Batubara district is in the second quadrant. This means that it is advanced but depressed. Moreover, the role of the fisheries sector to other sectors is in the provision of production factors and capital base due to the economy factors built-in to the same space. Herein, the result of correlation analysis of the fisheries sector with other sectors is 0,9. This shows that there is a very strong linkage between the fisheries sector and other sector values in the Batubara District.
Źródło:
World News of Natural Sciences; 2019, 25; 31-43
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Size Distribution and Sex Ratio of the Blue Swimming Crab (Portunus (Portunus) pelagicus Linnaeus, 1758) Commodities in Gebang Mekar Village, Cirebon Regency, West Java, Indonesia
Autorzy:
Shabrina, Nabilla
Khan, Alexander M. A.
Gumilar, Iwang
Supriadi, Dedi
Powiązania:
https://bibliotekanauki.pl/articles/1031889.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Portunus pelagicus
blue swimming crab
carapace width
gebang mekar village
sex ratio
Opis:
Blue swimming crab (Portunus (Portunus) pelagicus (Linnaeus, 1758)) is included as one of the fishery commodities that has high economic value and becomes one of the primadonnas in the field of fisheries. Besides in the local market, the blue swimming crabs can be one of the high levels and promising export commodities. The purpose of this research is to determine the size distribution and sex ratio from blue swimming crab in Java Sea near Gebang Mekar Village, Cirebon Regency. This research was conducted in Gebang Mekar Village, Cirebon Regency at September 2019 – October 2019 using the case study method with descriptive analysis and quantitative approach. Primary data used are the carapace width of blue swimming crab, amount of male and female blue swimming crab and female blue swimming crab containing egg. The results of the research that blue swimming crab catched by crab gillnet in Java Sea near Gebang Mekar Village, Cirebon Regency have sex ratio 1:1 and the growth of male crabs in these waters was faster than that of female crabs.
Źródło:
World News of Natural Sciences; 2020, 30, 2; 232-242
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gamma radiation treated chitosan solution for strawberry preservation: Physico-chemical properties and sensory evaluation
Autorzy:
Jesmin, S.
Al-Jubayer, A.
bin Eusuf, S.
Kamal, A.H.M.
Islam, J.M.M.
Ferdoush, F.
Kabir, S.E.
Khan, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/11054.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2016, 60
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Marine Debris Pathway Across Indonesian Boundary Seas
Autorzy:
Purba, Noir P.
Faizal, Ibnu
Cordova, Muhammad R.
Abimanyu, Amarif
Afandi, Najma K. A.
Indriawan, Dena
Khan, Alexander M. A.
Powiązania:
https://bibliotekanauki.pl/articles/1839151.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
floating debris
Indonesia Throughflow
marine pollution
wind
ocean current
Opis:
The complex circulation for both atmospheric and ocean affects the pathways of floating marine debris (MD). The aim of this research was to define the MD trajectories in the Indonesian boundary seas. The Lagrangian particle method was applied with oceanographic factors and debris classes based on 1 to 3% windage class. The simulation was applied during the Northwest and Southeast Monsoon period. On the basis of the obtained findings, the debris trajectory patterns were indicated to vary in the two monsoons. In the northern part of Indonesia, all neighbouring countries were affected, especially those near the boundaries. In the southern part of Indonesia, most of the debris headed west towards the Indian Ocean. MD was mostly transported by the ocean currents and monsoonal wind and ended up in the coastal area. Some debris was also still floating in the open ocean after three months. This study concluded that marine litter not only polluted Indonesia water, but also the neighbouring countries.
Źródło:
Journal of Ecological Engineering; 2021, 22, 3; 82-98
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 66

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