scholarly journals Efektivitas low light emitting diode sebagai lampu pengumpul ikan untuk perikanan bagan tancap

DEPIK ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 365-376
Author(s):  
Adi Susanto ◽  
Sugeng Hari Wisudo ◽  
Mulyono Sumitro Baskoro ◽  
Mochammad Riyanto ◽  
Fis Purwangka
Keyword(s):  
Low Power ◽  
Light Emitting Diode ◽  
Research Field ◽  
Main Zone ◽  
Fishing Activity ◽  
Great Opportunity ◽  
White Leds ◽  
Swimming Pattern ◽  
Imaging Sonar ◽  
And Behavior

The effectiveness of the artificial lights on fishing activity with a fixed lift net is significant influences on the success of fishing operations. The used of color and intensity must be adjusted to the preferences, response and behavior of the target fish, due to the fish can be more quickly attracted and concentrated in the catchable area. The development of LED technology as an energy-saving lamp has a great opportunity to be applied as a fishing lamp for fixed lift net fisheries. The purpose of this study is to determine the effectiveness of low power LEDs as a fishing lamp based on fish behavioral response. The study was conducted on a research field laboratory that was built in the waters of the Banten Bay in July - August 2018. Test fish were collected from catches of the guiding barrier around the research vehicle. Data on response and behavior of fish to fluorescent lights, blue, green and white LEDs were recorded using 360 ° sonar and side imaging sonar. The results showed the green LEDs had better effectiveness in attracting, focusing and concentrating fish in the main zone than other types of lights. The fish gather more quickly, form groups and have a stable and consistent swimming pattern in the main lighting zone. Green LED is more appropriate to be used as a fishing lamp on fixed lift net fishing with an optimum intensity range of 4-20 μW cm².Keywords: Light, Intensity, Optimum, Response, BehaviorABSTRAKEfektivitas lampu yang digunakan pada proses penangkapan dengan bagan tancap sangat berpengaruh terhadap keberhasilan operasi penangkapan ikan. Intensitas dan warna yang digunakan harus disesuaikan dengan preferensi, respons dan tingkah laku ikan target sehingga ikan lebih cepat terkumpul dan terkonsentrasi pada catchable area. Perkembangan teknologi LED sebagai lampu hemat energi berpeluang besar digunakan sebagai fishing lamp untuk perikanan bagan tancap. Penelitian ini bertujuan untuk menentukan efektivitas low power LED sebagai lampu pemikat ikan berdasarkan aspek respons dan tingkah laku ikan. Penelitian dilakukan pada wahana penelitian yang dibangun di perairan Teluk Banten pada bulan Juli - Agustus 2018. Ikan uji diperoleh dari hasil tangkapan sero yang berada di sekitar wahana penelitian. Data respons dan tingkah laku ikan terhadap lampu neon, LED biru, hijau dan putih direkam menggunakan sonar 360° dan side imaging sonar. Hasil penelitian menunjukkan LED hijau memiliki efektivitas yang lebih baik dalam memikat, mengumpulkan dan mengkonsentrasikan ikan pada main zone dibandingkan jenis lampu lainnya. Ikan lebih cepat berkumpul, membentuk kelompok serta memiliki pola renang yang stabil dan konsistem di zona utama pencahayaan. LED hijau lebih tepat digunakan sebagai fishing lamp pada bagan tancap dibandingkan jenis lampu lainnya dengan intensitas optimum antara 4-20 μW/cm².Kata kunci: Cahaya, Intensitas, Optimum, Respons, Tingkah laku

A Review of the Restorative Environment Research in the Mainland of China

2016 ◽  
Vol 1 (3) ◽  
Author(s):  
Meng Ruoxi ◽  
Xu Leiqing
Keyword(s):  
Subjective Evaluation ◽  
Publishing House ◽  
Mainland China ◽  
Research Field ◽  
Restorative Environment ◽  
International Publishing ◽  
Fight Or Flight Response ◽  
And Behavior ◽  
Objective Indicators ◽  
Theory Framework

More and more Chinese experts focus on the research field of the restorative environment and public health. We reorganized the theories of restorative environment and proposed a theory framework which consists of Attention Restorative Theory(ART) and psycho-evolutionary theory and other three auxiliary hypothesis included Biophilia Theory, Prospect-Refuge Theory and Stress: The "fight or flight" response We classified the experiments methods into three types; the psychological, subjective evaluation, physiological objective indicators, and  behavior improvements .We could figure out some shared questions at the current research in mainland China, such as limited research methods, limited senses used in the current research.© 2016.The Authors. Published for AMER ABRA by e-International Publishing House, Ltd., UK. Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies, Faculty of Architecture, Planning & Surveying, UniversitiTeknologi MARA, Malaysia.Keywords : Restorative; Theory;Questionnaire;Experiments 

scholarly journals ANALYSIS ON NON-PROFIT ADVERTISEMENTS BASED ON CULTURAL DIFFERENCE BETWEEN CHINA AND UNITED STATES

2021 ◽  
Author(s):  
QIAN WANG
Keyword(s):  
Cultural Difference ◽  
Economic Status ◽  
Developed Countries ◽  
Cultural Background ◽  
Research Field ◽  
Consumer Perceptions ◽  
Non Profit ◽  
Social Economic Status ◽  
And Behavior ◽  
Consumer's Perception

The research field of consumer behavior is not a new one. In fact, many researchers have conducted surveys and experiments in this field. Also, the topic on how advertisement influences consumer perceptions has been explored. It is obvious that culture background and social economic status are different between developed countries and developing countries. This can vary consumers’ perception and behaviors. Non-profit advertisement will influence consumer’s perception and behavior on the basis of cultural background. Thus, it will also be extremely crucial for non-profit advertisements to study cultural differences to learn more about consumers. This study focuses on cultural background, aiming to find the differences on how different non-profit advertisement between China and U.S., and provide useful strategies to plan non-profit advertisements.

scholarly journals “Study Natural” without Drugs: An Exploratory Study of Theory-Guided and Tailored Health Campaign Interventions to Prevent Nonmedical Use of Prescription Stimulants in College Students

2020 ◽  
Vol 17 (12) ◽  
pp. 4421
Author(s):  
Zhaohui Su ◽  
Michael Mackert ◽  
Xiaoshan Li ◽  
Jiyoon (Karen) Han ◽  
Brittani Crook ◽  
...  
Keyword(s):  
College Students ◽  
Online Survey ◽  
Research Field ◽  
Health Campaign ◽  
Prescription Stimulants ◽  
Effective Strategies ◽  
Nonmedical Use ◽  
Students Attitudes ◽  
And Behavior ◽  
Attitudes And Behavior

Nonmedical use of prescription stimulants (NMUPS) among college students continues to rise. While some anti-NMUPS campaigns are available, little is known about the campaign development process and how well college students evaluate these messages. To bridge this gap, we developed theory-guided anti-NMUPS campaign interventions that are tailored to college students’ characteristics and evaluated students’ response towards them. A total of 445 college students (74.4% female; Meanage of 20; 18 to 35 years old) reviewed the campaign interventions and offered their evaluation via an online survey. Findings indicate that students responded to the campaigns positively. Results also indicate that female students are more likely to perceive the campaigns as effective than their male counterparts. Overall, the findings of this study suggest that theory-guided and tailored anti-NMUPS campaigns have great potential in changing students’ attitudes and behavior towards NMUPS. While this study fills critical gaps in the literature, considering the progress needed to strengthen the research field, more research is needed to further identify effective strategies that could prevent college students’ participation in NMUPS activities.

Color Tuning of Biomass-Derived Carbon Nanodots by Reaction Temperature Toward White Light-Emitting Diodes

NANO ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. 2050159
Author(s):  
Yi Gong ◽  
Yanbing Han ◽  
Fang Zhang ◽  
Mingyue Zhai ◽  
Xing Chen ◽  
...  
Keyword(s):  
Reaction Temperature ◽  
White Light ◽  
Heating Temperature ◽  
Light Emitting Diode ◽  
Peak Position ◽  
Carbon Nanodots ◽  
One Pot ◽  
Light Emitting ◽  
White Leds ◽  
Band Emission

In this work, carbon nanodots (CNDs) were synthesized from extract of mango leaves. Sphere nanodots were formed rapidly by one-step microwave heating. The photoluminescence (PL) of the CNDs was found greatly dependent on the reaction temperature. The emission peak position of the CNDs changed from 550[Formula: see text]nm to 430[Formula: see text]nm when the heating temperature increased from 120[Formula: see text]C to 150[Formula: see text]C. Particularly, the CNDs synthesized at 130[Formula: see text]C showed multi-band emission at 411[Formula: see text]nm, 480[Formula: see text]nm and 530[Formula: see text]nm, providing emitting color from blue to yellow. Moreover, the free chlorophyll molecules in the solution added red fluorescence at 670[Formula: see text]nm, and the integrated emitting color of the CNDs solution was close to white. Coated on a commercial 365[Formula: see text]nm light-emitting diode (LED) chip, the CNDs showed greenish white light with CIE coordinates of (0.37, 0.44). This work provided a one-pot, rapid and green method to obtain multi-emissive CNDs toward white LEDs.

Discomfort glare caused by white LEDs having different spectral power distributions

2017 ◽  
Vol 50 (6) ◽  
pp. 921-936 ◽  
Author(s):  
WJ Huang ◽  
Y Yang ◽  
M Ronnier Luo
Keyword(s):  
White Light ◽  
Spectral Power ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
White Leds ◽  
Significant Difference ◽  
Discomfort Glare ◽  
Led Lights ◽  
Green Leds

This paper describes an experiment to investigate discomfort glare caused by white light-emitting diode (LED) lights having different spectral power distributions. It included two groups: a ‘Metamerism’ group and a ‘correlated colour temperatures (CCT)’ group. In the former group, it was found that white lights at 7000 K constructed from different blue LEDs and the same red and green LEDs gave about the same glare perception. In the latter group, there was a significant difference in glare perception between white lights having different CCTs. Finally, glare models, including unified glare rating (UGR) and the newly derived QUGRspd, and mUGRspd models, were tested using the data from the experiment. All of them gave quite accurate predictions of the data.

Low-Power Flexible Organic Light-Emitting Diode Display Device

2011 ◽  
Vol 23 (31) ◽  
pp. 3511-3516 ◽  
Author(s):  
Sunkook Kim ◽  
Hyuk-Jun Kwon ◽  
Sunghun Lee ◽  
Hongshik Shim ◽  
Youngtea Chun ◽  
...  
Keyword(s):  
Low Power ◽  
Light Emitting Diode ◽  
Display Device ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

Variation of thermal resistance with input current and ambient temperature in low-power SMD LED

2018 ◽  
Vol 35 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Muna E. Raypah ◽  
Dheepan M.K. ◽  
Mutharasu Devarajan ◽  
Shanmugan Subramani ◽  
Fauziah Sulaiman
Keyword(s):  
Low Power ◽  
Thermal Resistance ◽  
Ambient Temperature ◽  
Light Emitting Diode ◽  
Operating Conditions ◽  
Input Current ◽  
Junction Temperature ◽  
Total Thermal Resistance ◽  
Content Type ◽  
Thermal Transient

Purpose Thermal behavior of light-emitting diode (LED) device under different operating conditions must be known to enhance its reliability and efficiency in various applications. The purpose of this study is to report the influence of input current and ambient temperature on thermal resistance of InGaAlP low-power surface-mount device (SMD) LED. Design/methodology/approach Thermal parameters of the LED were measured using thermal transient measurement via Thermal Transient Tester (T3Ster). The experimental results were validated using computational fluid dynamics (CFD) software. Findings As input current increases from 50 to 90 mA at 25°C, the relative increase in LED package (ΔRthJS) and total thermal resistance (ΔRthJA) is about 10 and 4 per cent, respectively. In addition, at 50 mA and ambient temperature from 25 to 65°C, the ΔRthJS and ΔRthJA are roughly 28 and 22 per cent, respectively. A good agreement between simulation and experiment results of junction temperature. Originality/value Most of previous studies have focused on thermal management of high-power LEDs. There were no studies on thermal analysis of low-power SMD LED so far. This work will help in predicting the thermal performance of low-power LEDs in solid-state lighting applications.

scholarly journals Increased fibroblast proliferation induced by light emitting diode and low power laser irradiation

2003 ◽  
Vol 18 (2) ◽  
pp. 95-99 ◽  
Author(s):  
Elke M. Vinck ◽  
Barbara J. Cagnie ◽  
Maria J. Cornelissen ◽  
Heidi A. Declercq ◽  
Dirk C. Cambier
Keyword(s):  
Low Power ◽  
Laser Irradiation ◽  
Light Emitting Diode ◽  
Fibroblast Proliferation ◽  
Power Laser ◽  
Light Emitting

Current Status of GaN-Based Solid-State Lighting

MRS Bulletin ◽  
2009 ◽  
Vol 34 (2) ◽  
pp. 101-107 ◽  
Author(s):  
Shuji Nakamura
Keyword(s):  
Continuous Improvement ◽  
Charge Separation ◽  
Energy Savings ◽  
Light Emitting Diode ◽  
Current Status ◽  
Light Emitting ◽  
White Leds ◽  
Semipolar Gan ◽  
Near Future ◽  
Nonpolar Gan

AbstractThe continuous improvement in luminous efficacy of “white” light-emitting-diode (LED) sources offers the potential of considerable energy savings in general lighting applications. Recent experiments at UCSB have demonstrated 117 lumens per watt (lm/W) in white LEDs, with further improvements expected in the near future. Considerable progress has also been achieved using nonpolar GaN, such as a-plane {1120} and m-plane {1100} GaN, or semipolar GaN substrates. Such devices avoid the deleterious effects of charge separation due to spontaneous and piezoelectric polarization inherent in most c-axis-oriented devices.

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