scholarly journals PENGARUH CAHAYA LAMPU TERHADAP POLA AGREGASI IKAN DI BAGAN TANCAP PERAIRAN KEPULAUAN SERIBU

2017 ◽  
Vol 15 (2) ◽  
pp. 141
Author(s):  
Asep Priatna ◽  
Mahiswara Mahiswara
Keyword(s):  
Light Intensity ◽  
Data Interpretation ◽  
Light Illumination ◽  
Intensity Level ◽  
Catch Data ◽  
Maximum Value ◽  
Aggregation Pattern ◽  
Fish Aggregation ◽  
Graph Presentation ◽  
Visual Description

Penelitian ini bertujuan untuk mempelajari pola agregasi ikan di bawah pengaruh cahaya lampu bagan tancap. Penelitian dilaksanakan pada bulan Mei 2005 di Kepulauan Seribu. Pengamatan pola agregasi ikan dilakukan dengan menggunakan alat akustik Simrad EY500. Data intensitas cahaya diambil dengan menggunakan light meter LI-250, serta verifikasi hasil tangkapan untuk memperkuat hasil analisis. Analisis meliputi interpretasi visual berbasis pada presentasi grafik yang merupakan dasar bagi penafsiran data dan penyusunan informasi. Pengaruh intensitas cahaya yang berbeda terhadap agregasi ikan mempunyai pola yang tidak sama, baik nilai intensitas cahaya optimumnya, besarnya agregasi, maupun posisi kedalaman untuk nilai agregasi terbesar. Proses pengumpulan ikan pada awal penyinaran dengan perlakuan jenis lampu petromak lebih cepat dibanding dengan hasil perlakuan lampu mercuri. Ikan akan beradaptasi terhadap variasi iluminasi cahaya sehingga selama proses pencahayaan terjadi migrasi. The research objective was to study fish aggregation pattern under light influence set in stationary bamboo lift net. This research was conducted on May 2005 in Seribu Islands waters. Simrad EY-500 echosounder was used to observe the fish aggregation. Light meter LI 250 was used to measure light intensity level and catch data for supporting the analysis result. Data analyzed by visual description based on graph presentation were used as data interpretation and information. The influence of different light intensity on fish aggregation had different pattern especially for optimum value of light intensity, maximumvalue of fish aggregation, and depth layer of the maximum value of fish aggregation. For fish aggregation under light of kerosene pressured lamps was quicker than mercury lamps in the early of illumination process. Fish will adapt to various light illumination, so that during illumination process the migration of fish is occured.

scholarly journals SEBARAN KEPADATAN AKUSTIK IKAN PELAGIS DI BAWAH PENGARUH CAHAYA LAMPU PADA PERIKANAN PUKAT CINCIN DI LAUT JAWA

2017 ◽  
Vol 15 (2) ◽  
pp. 151
Author(s):  
Mahiswara Mahiswara ◽  
Agustinus Anung Wiodo ◽  
Asep Priatna
Keyword(s):  
Light Intensity ◽  
Research Result ◽  
Purse Seine ◽  
Fluorescent Lamp ◽  
Aggregation Pattern ◽  
Java Sea ◽  
Fish Aggregation

Persaingan penggunaan cahaya lampu sebagai alat bantu penangkapan pada perikanan pukat cincin cenderung semakin meningkat. Suatu penelitian untuk mengetahui pola agregasi ikan di bawah pengaruh cahaya lampu telah dilaksanakan pada bulan Juli 2005 di perairan Laut Jawa. Pengamatan terhadap kapal pukat cincin dengan daya lampu 10.000-20.000 watt menggunakan perangkat akustik SIMRAD EY-500 dilakukan untuk mengetahui sebaran ikan di dalam air dan luxmeter tipe Licor LI 250 untuk mengukur intensitas cahaya. Analisis akustik, statistik, dan deskripsi digunakan untuk menjelaskan data dan informasi yang diperoleh. Hasil analisis menunjukkan bahwa penggunaan lampu fluorocent 20.000 watt diperoleh jumlah kepadatan akustik pada nilai >10 m2/ n.mi2 lebih tinggi dibandingkan dengan penggunaan lampu fluorocent 10.000 dan 15.000 watt. Terdapat hubungan antara jumlah daya lampu yang digunakan dengan hasil tangkapan pada perikanan pukatcincin. The competition on utilization of lights in purse seine fisheries tends to be more increased. A research to obtain fish aggregation pattern under light on purse seiner with 10,000-20,000 watt in power was conducted on July 2005 in Java Sea. SIMRAD EY-500 to observe underwater fish aggregation and luxmeter type LI-250 to measure light intensity was operated during the research result. Data were analyzed with acoustic, statistic and descriptive methods to figure out of the research. The results showed that acoustic density was >10 m2 /n.mi2 on fluorescent lamp by 20,000 watt in power, which was higher than 10,000 and 15,000 watt. There is a correlation between numbers of lights with catches of purseseiner.

Exposure of Polymeric Glazing Materials Using NREL’s Ultra-Accelerated Weathering System (UAWs)

2010 ◽  
Author(s):  
Carl Bingham ◽  
Gary Jorgensen ◽  
Amy Wylie
Keyword(s):  
Light Intensity ◽  
Thermal Effects ◽  
Outdoor Exposure ◽  
Exposure Chamber ◽  
Accelerated Weathering ◽  
Intensity Level ◽  
Design And Implementation ◽  
Different Temperatures ◽  
Exposure Testing ◽  
Ultraviolet Irradiance

NREL’s Ultra-Accelerated Weathering System (UAWS) selectively reflects and concentrates natural sunlight ultraviolet irradiance below 475 nm onto exposed samples to provide accelerated weathering of materials while keeping samples within realistic temperature limits. This paper will explain the design and implementation of the UAWS which allow it to simulate the effect of years of weathering in weeks of exposure. Exposure chamber design and instrumentation will be discussed for both a prototype UAWS used to test glazing samples as well as a commercial version of UAWS. Candidate polymeric glazing materials have been subjected to accelerated exposure testing at a light intensity level of up to 50 UV suns for an equivalent outdoor exposure in Miami, FL exceeding 15 years. Samples include an impact modified acrylic, fiberglass, and polycarbonate having several thin UV-screening coatings. Concurrent exposure is carried out for identical sample sets at two different temperatures to allow thermal effects to be quantified along with resistance to UV.

scholarly journals Effects of LED light on Acacia melanoxylon bud proliferation in vitro and root growth ex vitro

2019 ◽  
Vol 14 (1) ◽  
pp. 349-357 ◽  
Author(s):  
Shubin Li ◽  
Lili Zhou ◽  
Sipan Wu ◽  
Li Liu ◽  
Meng Huang ◽  
...  
Keyword(s):  
Light Intensity ◽  
Root Growth ◽  
Photon Flux ◽  
Light Illumination ◽  
Root Number ◽  
Ex Vitro ◽  
Blue Led ◽  
Positive Effects ◽  
Acacia Melanoxylon

AbstractThis study examines the effects of light emitting diodes (LEDs) on tissue culture proliferation of Acacia melanoxylon plantlets among five different clones (FM1, FM2, FM4, FM5, and FM10). Shoot bud apex cuttings were transplanted onto Murashige and Skoog basal medium containing 0.1 mg L-1 6-benzyladenine and 0.5 mg L-1 naphthalene acetic acid and cultured in vitro for 40 days. Root growth was studied under different light intensities and photoperiods ex vitro. The bud proliferation coefficient was greatest under a light intensity of 45 μmol m-2 s-1 photosynthetic photon flux and photoperiod of 16 h light, but decreased as the light intensity increased. However, the greatest light intensity was beneficial for the growth of robust plantlets. Plantlets exposed to red and blue LED combinations grew tall and green, with a small number of roots. Plantlets also grew taller and some roots expanded under the longer photoperiod. Increased light intensity had positive effects on root number and rooting rate, and prolonged light greatly increased root number. Therefore, lower light intensity and a short photoperiod were beneficial for bud proliferation, while red/blue LED combinations, increased light intensity, and longer light illumination were beneficial for plantlet growth and root growth of Acacia melanoxylon.

BIM architecture design from the perspective of smart city and its application in traditional residential design

2020 ◽  
pp. 1-10
Author(s):  
Yan’an Lu ◽  
Lei Shi
Keyword(s):  
Safety Factor ◽  
Smart City ◽  
Consumption Rate ◽  
Building Design ◽  
Resource Consumption ◽  
Strength Level ◽  
Architecture Design ◽  
Intensity Level ◽  
Residential Design ◽  
Maximum Value

This research mainly discusses the characteristics of BIM architecture design and its application in traditional residential design from the perspective of smart cities. Given the topics that people are more concerned about, this research mainly uses BIM modeling technology to initially build a virtualized building model. It discusses the convenience of intelligent automation technology in terms of resource consumption and house security. In terms of safety, different levels of wind blowing strength are mainly used to measure the distance moved by the house to evaluate the safety factor. Divide the wind blowing intensity into A, B, C, D, E, F, and 6 levels to test the strength of the house. When the wind intensity level is F, the safety factor is the weakest, which is 20%. When conducting a house consumption test, directly measure the house’s electricity consumption within a specified time to conduct a resource rate consumption test. Divide the time period into 1 h, 2 h, 3 h, 4 h, 5 h, 6 h, 6 different time periods to measure power consumption. The resource consumption rate reaches a maximum value of 96% when the length of time is 6 h. The experimental results show that the safety characteristics of BIM technology are the weakest when the wind strength level is F, and the safety performance is different when the wind strength level is different. In terms of resource consumption, the resource consumption rate reaches the maximum value when the time is 6 h, and the length of time directly determines the housing resource consumption rate. From the perspective of a smart city, BIM building design has the advantages of low resource consumption and high safety factor.

scholarly journals Shade requirements of aglaonemas

1969 ◽  
Vol 74 (2) ◽  
pp. 95-102
Author(s):  
Gerardo Ruiz-Sifre
Keyword(s):  
Light Intensity ◽  
Commercial Production ◽  
Intensity Level ◽  
Shoot Height ◽  
Nylon Fiber ◽  
Number Of Leaves ◽  
The Ideal

Aglaonema María and Silver Queen were grown under 63%, 80% and 92% shade to determine the optimum shade level or light intensity level for commercial production. María's shoot height and number of offsets increased as the shade level decreased. In Silver Queen the number of leaves increased and the number of offsets decreased as the shade level increased. The highest number of offsets was produced by Silver Queen at 63% shade. Light intensity at 63% nylon fiber shade increased offset production in both Silver Queen and María. Thus, 63% shade seems to be the ideal shade for aglaonema offset production.

Efficiency of solar energy conversion as a function of light intensity

2008 ◽  
Vol 80 (10) ◽  
pp. 2069-2077
Author(s):  
Sergei Varfolomeev
Keyword(s):  
Solar Energy ◽  
Light Intensity ◽  
Energy Conversion ◽  
Solar Energy Conversion ◽  
Maximum Efficiency ◽  
Light Illumination ◽  
Photosynthetic System ◽  
System Parameters ◽  
Photosynthetic Antenna ◽  
Photosynthesis And Respiration

The kinetic model has been developed for disserting the efficiency of solar energy conversion as a function of light intensity. A comparison of theory with experimental results shows that the model provides a satisfactory agreement. We have estimated the essential parameters of photosynthetic systems (the size of the photosynthetic antenna, the rate of electron transport, the correlation between photosynthesis and respiration) that are responsible for reaching the maximum efficiency at "one sun" and "one hundred suns" light illumination intensities. Recommendations for the improvement of photosynthetic system parameters using genetic engineering methods are also provided.

Association of after-school physical activity levels and organized physical activity participation in Hong Kong children

2012 ◽  
Vol 18 (2) ◽  
pp. 182-190 ◽  
Author(s):  
Peggy PY Cheung
Keyword(s):  
Physical Activity ◽  
Hong Kong ◽  
Light Intensity ◽  
Primary Schools ◽  
Intervention Strategy ◽  
After School ◽  
Intensity Level ◽  
Activity Levels ◽  
Factorial Anova ◽  
School Period

The aims of this study were to 1) describe the children’s physical activity (PA) patterns during the after-school period and 2) to compare the type and intensity of activity during the after-school period of children with or without participation in organized PA programmes. The participants were 456 children from four primary schools in Hong Kong. Self-administered questionnaires were used to measure the PA pattern and intensity level of the children during the after-school period. Independent t-test and factorial ANOVA was used for data analysis. Results indicated that children engaged substantial time in light intensity PA during the after-school period. Children who participated in organized PA programmes spent fewer time blocks on light intensity PA and more time blocks in vigorous PA. The boys spent more time blocks on high intensity PA than the girls. A structured PA programme during the after-school period is a potential intervention strategy to increase children’s PA participation without using up the time intended for children’s homework.

Research of Optical Characteristics of Diffuser with Taper Microstructure by Micro Injection Molding

2014 ◽  
Vol 609-610 ◽  
pp. 1313-1318
Author(s):  
Da Ming Wu ◽  
Jian Zhuang ◽  
Zhong Li Zhao ◽  
Hong Xu ◽  
Yao Huang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Light Intensity ◽  
Injection Molding ◽  
Intensity Distribution ◽  
Visual Angle ◽  
Optical Axis ◽  
Diameter Ratio ◽  
Vertex Angle ◽  
Light Intensity Distribution ◽  
Maximum Value

In this paper, diffuser with taper microstructure has been put forward, and the transmission of the light in the taper microstructure has been analyzed. The software of Lighttools has been used to analyze the influence on light intensity distribution of the vertex angle θ, the space between the microstructure L, the diameter ratio of up to down of the microstructure A/B, the cutting output of the microstructure H and the refractive index of the diffuser n1.As a result, the light intensity of the optical axis will increase and visual angle will decrease when the vertex angle θ, the refractive index of the diffuser n1 and the cutting output of the microstructure H increase; the light intensity of the optical axis will increase and visual angle will decrease when the space between the microstructure decrease; with the increasing of the ratio A/B, the light intensity of the optical axis would first increase and then decrease, visual angle would first decrease and then increase. When A/B=0.4, the light intensity gets the maximum value, the visual angle gets the minimum value. The result of the simulation is significant to manufacture and research.

scholarly journals Evaluation of Biogenic Volatile Organic Compound Emissions and Its Impact of Ozone Formation

1970 ◽  
Vol 7 (1) ◽  
pp. 48-55 ◽  
Author(s):  
A. Kondo ◽  
B. Hai ◽  
K. L. Shrestha ◽  
A. Kaga ◽  
Y. Inoue
Keyword(s):  
Organic Compound ◽  
Light Intensity ◽  
Volatile Organic Compound ◽  
Growth Chamber ◽  
Monthly Average ◽  
Ozone Concentrations ◽  
Maximum Value ◽  
Volatile Organic ◽  
Volatile Organic Compound Emissions ◽  
Biogenic Volatile Organic Compound

The standard Biogenic Volatile Organic Compound (BVOC) emissions from ten Japanese plant species were measured by using a growth chamber where temperature and light intensity can be controlled. These species were selected due to their abundance in the estimated domain of the Kinki region. The BVOC emissions in Kinki region during July 2002 were estimated by revising the standard BVOC emissions from temperature and light intensity which were calculated by MM5. The two types of the ozone calculation were carried out by CMAQ. One was the calculation with BVOC emissions (BIO). Another was the calculation that assumes BVOC emissions to be zero (NOBIO). The maximum ozone concentrations of BIO reasonably reproduced the observed maximum concentrations in especially the fine days. The hourly differences of monthly average ozone concentrations between BIO and NOBIO had the maximum value of 6ppb at 2 p.m. The explicit difference appeared in urban area, though the place where the maximum of difference occurred changed. It was shown that the BVOC emitted from the forest area strongly affected the ozone generation in the urban area.Key words: biogenic volatile organic compound, ozone, MM5, CMAQ, growth chamber Journal of the Institute of Engineering, Vol. 7, No. 1, 2009, July, pp. 48-55doi: 10.3126/jie.v7i1.2062

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