scholarly journals Modeling of A LDR Based Liquid Level Detecting Device Using Power Function

2021 ◽  
Vol 6 (2) ◽  
pp. 16-23
Author(s):  
R.I. Salawu ◽  
S.O. Adetona
Keyword(s):  
Power Function ◽  
Lower Cost ◽  
Light Emitting Diode ◽  
Cross Sectional ◽  
Light Emitting ◽  
Closed Container ◽  
Proposed Model ◽  
Professional Environment ◽  
Volume Level ◽  
Main Attraction

All vehicles require liquid to move from one point to the other; and it is necessary for the driver of the vehicle to ascertain the volume (level) of the liquid in the tank before setting out on a journey, hence the need to know the level of the liquid in the tank. This paper therefore presents modeling and simulation of a sensory device, which evaluates the volume VLQD of any type of liquid in any type of a closed container that has a cross-sectional area A (m2) and height h (m). The main attraction of the approach is that it does not get in touch with the liquid, its simplicity and lower cost. The aim is achieved by using a sensor, Light Dependent Resistor (LDR); which operates on a principle which states that the voltage ELUX in Volts across a LDR is a function of luminance it receives from a light source, Light Emitting Diode (LED). This principle and a power function developed using experimental data were used to model VLQD; which reveals that VLQD in litres is a function of ELUX in Volts. The model of VLQD was simulated for the sake of validation in the Proteus 8.9 professional environment. The results obtained revealed that the proposed model correctly indicated the VLQD in litres in a closed container that its A (m2) and h (m) are known and specified in the model.

scholarly journals Assessing the irradiance levels of phototherapy devices in Jos, north central, Nigeria

2018 ◽  
Vol 6 (4) ◽  
pp. 1088
Author(s):  
Akinyemi O. D. Ofakunrin ◽  
Udochukwu M. Diala ◽  
Bose O. Toma ◽  
David D. Shwe ◽  
Sanusi Gidado ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Significant Proportion ◽  
Neonatal Morbidity ◽  
Cross Sectional Study ◽  
Optimum Level ◽  
Cross Sectional ◽  
Middle Income ◽  
North Central ◽  
Light Emitting ◽  
Routine Assessment

Background: Neonatal jaundice (NNJ) remains a major cause of neonatal morbidity and mortality in Nigeria with significant contribution to the global figures. Effective phototherapy can reduce the complications associated with NNJ. The effectiveness of a phototherapy device (PD) depends mainly on the emitted irradiance of the device. We, therefore, assessed the irradiance of the PDs in Jos, North Central Nigeria in order to determine the effectiveness of the devices and to highlight the need for routine assessment of irradiance levels of PDs in low-middle income settings.Methods: This was a cross- sectional study involving 14 hospitals with a total of 38 functional PDs comprising of 25 (65.8%) locally fabricated, eight (21.0%) light- emitting diode (LED) and five (13.2%) conventional patented devices. The irradiance was measured using the BiliBlanket® light meter II.Results: The irradiance of the PDs ranged from 2 to 102μW/cm2/nm with a median value of 10.6 (IQR 6-18μW/cm2/nm).   Sixteen devices (42.1%) had a suboptimal irradiance (<10μW/cm2/nm); while only five (13.2%) provided irradiance at the intensive level (≥30μW/cm2/nm). The mean distance between the babies and phototherapy lights was 35.1±12.7cm (range 15-70cm).Conclusions: A significant proportion of the PDs in Jos delivered suboptimal irradiance which could reduce the effectiveness of the phototherapy. The irradiance of PDs needs to be assessed regularly and measures should be instituted to improve the irradiance to the optimum level in order to reduce the burden of kernicterus.

Measurement of acetylcholinesterase in erythrocytes in the field.

1987 ◽  
Vol 33 (10) ◽  
pp. 1731-1735 ◽  
Author(s):  
R A Magnotti ◽  
J P Eberly ◽  
D E Quarm ◽  
R S McConnell
Keyword(s):  
Silicon Carbide ◽  
Blue Light ◽  
Lower Cost ◽  
Light Emitting Diode ◽  
Field Method ◽  
Capillary Blood ◽  
Field Methods ◽  
Blood Samples ◽  
Light Emitting

Abstract We describe here a field method we developed for colorimetry of erythrocytic acetylcholinesterase (EC 3.1.1.7) in capillary blood samples. Three stable, premixed assay reagents and de-ionized water (but no centrifuge or balance) are required. This method, adapted for a microplate format, is essentially that of Ellman et al. (Biochem Pharmacol 1961;7:88-95) as modified by George and Abernethy (Clin Chem 1983;29:365-8). Assays were quantified and corrected for hematocrit by using a battery-powered colorimeter with a silicon carbide (blue) light-emitting-diode source. Advantages over existing field methods include better portability, ruggedness, greater precision, and lower cost per sample.

scholarly journals PENGGUNAAN LIGHT EMITTING DIODE PADA LAMPU CELUP BAGAN (The Use of Light Emitting Diode on Sunked Lamps of Lift Net)

2016 ◽  
Vol 4 (2) ◽  
pp. 141
Author(s):  
Imanuel M. Thenu ◽  
Gondo Puspito ◽  
Sulaeman Martasuganda
Keyword(s):  
Key Words ◽  
Lower Cost ◽  
Light Emitting Diode ◽  
The Other ◽  
Fluorescent Lamp ◽  
Light Emitting ◽  
Led Light ◽  
Fluorescent Lamps ◽  
Energy Save

<p>ABSTRACT<br />Lift net fishermen usually use fluorescent lamp as attractor to lure fish. As price of fuel rise, fishermen are forced to find another option to change their attractor into some much lower cost and more energy-save lamp, or in other words, to change into LED lamp. This research are providing evidence that sunked LED lamps can be utilized as a helper tools, and also determined the best time for catching fish in the lift net. Two lift net used in this research, one of them used sunked LED lamps and the other used ordinary fluorescent lamps. Lift net are operated as long as 20 nights, with four catching times per night, between 18.00-21.00, 21.00-00.00, 00.00-03.00, and 03.00-06.00. Results showed that LED lamps give a better result with 11 organisms successfully catch (287,6 kg), compared to ordinary fluorescent lamps with only six organisms (238,3 kg). The best time for catching with LED lamps are between 18.00-21.00 (121 kg), while between 21.00-00.00 (67,4 kg), 00.00-03.00 (46,9 kg) and 03.00-06.00 (52,3 kg).<br />Key words: fluorescent lamp, lift net, light emitting diode, Palabuhanratu,sunked lights</p><p>-------</p><p><br />ABSTRAK<br />Nelayan bagan biasa menggunakan lampu fluorescent sebagai atraktor untuk memanggil ikan. Harga bahan bakar yang mahal menyebabkan nelayan harus beralih memakai jenis lampu lain yang hemat energi, seperti lampu LED (light emitting diode) Penelitian bertujuan untuk membuktikan bahwa lampu celup LED dapat digunakan sebagai alat bantu penangkapan ikan pada bagan dan menentukan waktu operasi penangkapan terbaik. Dua bagan digunakan dalam penelitian ini. Masing-masing menggunakan lampu celup LED dan lampu fluorescent. Bagan dioperasikan selama 20 malam. Dalam 1 malam dilakukan 4 kali penangkapan, yaitu antara jam 18.00-21.00, 21.00-00.00, 00.00-03.00 dan 03.00-06.00. Hasil penelitian menunjukkan bahwa penggunaan lampu celup LED pada bagan menghasilkan 11 jenis organisma tangkapan seberat 287,6 kg, atau lebih banyak dari lampu fluorescent sejumlah 6 organisma (238,3 kg). Adapun waktu penangkapan terbaik pada bagan yang menggunakan lampu LED adalah antara pukul 18.00-21.00 yang menghasilkan tangkapan seberat 121 kg, sedangkan 21.00-00.00 (67,4 kg), 00.00-03.00 (46,9 kg) dan 03.00-06.00 (52,3 kg).<br />Kata kunci: lampu fluorescent, bagan, light emitting diode, Palabuhanratu, lampu celup</p>

scholarly journals Hubungan Penggunaan Smartphone pada Malam Hari Terhadap Kualitas Tidur Mahasiswa Program Studi Pendidikan Dokter Fakultas Kedokteran Universitas Andalas

2021 ◽  
Vol 1 (3) ◽  
pp. 379-385
Author(s):  
Nika Fitri Lubis ◽  
Fathiya Juwita Hanum ◽  
Mohamad Reza
Keyword(s):  
Global Positioning System ◽  
Light Emitting Diode ◽  
Personal Digital Assistant ◽  
P Value ◽  
Positioning System ◽  
Cross Sectional ◽  
Light Emitting ◽  
Global Positioning ◽  
E Mail ◽  
Wireless Mobile

Smartphone adalah telepon yang menggabungkan kemampuan-kemampuan canggih dan merupakan bentuk lanjutan dari Wireless Mobile Device (WMD) yang bisa berfungsi seperti komputer dengan menawarkan fitur-fitur yaitu Personal Digital Assistant (PDA), akses internet, e-mail, dan Global Positioning System (GPS). Indonesia merupakan pengguna aktif smartphone terbesar keempat di dunia setelah Cina, India, dan Amerika. Smartphone dilengkapi dengan tampilan light-emitting diode (LED) yang dapat menyebabkan penekanan produksi melatonin pada malam hari dan mempengaruhi regulasi sirkadian dari siklus tidur-bangun, sehingga mempengaruhi kualitas tidur. Tujuan: Mengetahui hubungan penggunaan smartphone pada malam hari terhadap kualitas tidur mahasiswa program studi Pendidikan Dokter Fakultas Kedokteran Universitas Andalas. Metode: Penelitian menggunakan metode analitik dengan desain cross-sectional yang dilakukan di Fakultas Kedokteran Universitas Andalas pada bulan Oktober 2019 – Juni 2020 . Teknik pengambilan sampel adalah stratified random sampling dengan jumlah total 261 sampel. Hasil: Penggunaan smartphone pada malam hari <2 jam (11,1 %), >2 jam (88,9%), kualitas tidur baik (37,9%), kualitas tidur buruk (62,1%). Hasil analisis bivariat didapatkan nilai p-value 0,024 (<0,05) yang berarti terdapat hubungan yang bermakna antara penggunaan smartphone pada malam hari terhadap kualitas tidur mahasiswa Pendidikan Dokter Fakultas Kedokteran Universitas Andalas. Simpulan: Terdapat hubungan yang bermakna antara penggunaan smartphone pada malam hari terhadap kualitas tidur mahasiswa program studi Pendidikan Dokter Fakultas Kedokteran Universitas Andalas. Kata Kunci: Smartphone, kualitas tidur.      

scholarly journals Knowledge and Attitude of Dental Clinicians towards Light-Curing Units: A Cross-Sectional Study

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Dana Al-Senan ◽  
Fatin Ageel ◽  
Amani Aldosari ◽  
Haifa Maktabi
Keyword(s):  
Light Emitting Diode ◽  
Statistical Significance ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Light Emitting ◽  
Electronic Survey ◽  
Inadequate Knowledge ◽  
Light Curing ◽  
Knowledge And Attitude ◽  
Composite Resin Restorations

Objectives. Light curing is crucial when applying composite resin restorations. Complete polymerization of the resin depends on delivering adequate light energy to it. Dental clinicians may be unaware of the importance of proper light-curing techniques. This study aimed at evaluating and comparing the level of knowledge of general practitioners (GPs) and specialists (SPs) regarding light-curing units. Materials and Methods. An electronic survey was conducted online among GPs and SPs of various specialties, working in the governmental sector in Riyadh, Saudi Arabia. Collected data were analyzed for statistical significance. Results. 310 dentists were included in the study. Nearly half of the GPs (45.9%) and more than half of SPs (56.8%) use light-emitting diode (LED) type light-curing units (LCUs). 36.9% of GPs and 29.6% of SPs were unsure about the type of LCUs they use in their dental clinics. 10.8% of GPs and 8.5% of SPs knew the proper term of the power output of LCU. 52.2% of the GPs and 55.7% of SPs were wrong about advancements in technology of LED LCUs. Regarding the use of radiometer, 48.2% of SPs and 35.1% of GPs had responded wrongly, and 37.7% of SPs and 52.3% of GPs were not familiar with the device, showing a statistical significance p = 0.040 . There was no statistical significance observed in the responses pertaining to their years of experience, expected for two questions. Conclusion. Both GPs and SPs displayed inadequate knowledge regarding the use of LCUs. Further educational programs are recommended to spread awareness about the handling of LCUs among dental clinicians.

scholarly journals GSM based dual power enhanced LED display notice board with motion detector

2018 ◽  
Vol 7 (2.8) ◽  
pp. 559
Author(s):  
Gowrishankar Kasilingam ◽  
K Nithiyananthan ◽  
Priyanka Ramesh Mani ◽  
Sunil Thomas
Keyword(s):  
Short Message Service ◽  
Light Emitting Diode ◽  
Short Message ◽  
Motion Detector ◽  
Light Emitting ◽  
Ac Power ◽  
Proposed Model ◽  
Message Service ◽  
Notice Board

In this paper, a new improved Light Emitting Diode (LED) Display notice board with GSM technology has been created to plugs in all the drawbacks in existing framework. The proposed model has an excellent display notice board to display notices or messages at places that require real-time visibility, thereby transferring messages by Short Message Service (SMS) through cellular device. The proposed work in this paper elaborately narrates the procedure to construct a display notice board that has the quality of displaying messages in continuously running mode, and enabling the user to alter the ongoing message using SMS instantaneously. This system also has the feasibility to bind with other devices such as PC or laptop. The best feature of proposed system is the dual system for changing messages. And also utilizes two way power supply such as Renewable energy (Solar Power) and AC power. This feature enables the proposed model to work under any situations which overcomes the drawback in the existing display notice boards. Additionally, a motion detector has been included which turn ON or OFF the system automatically if any motion is not sensed.

scholarly journals Diagnostic efficacy of Light-Emitting Diode (LED) Fluorescence based Microscope for the diagnosis of Tuberculous lymphadenitis

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0255146
Author(s):  
Gebeyehu Assefa ◽  
Kassu Desta ◽  
Shambel Araya ◽  
Selfu Girma ◽  
Adane Mihret ◽  
...  
Keyword(s):  
Gold Standard ◽  
Light Emitting Diode ◽  
Cross Sectional Study ◽  
Comparable Efficacy ◽  
Tuberculous Lymphadenitis ◽  
Time Saving ◽  
Diagnostic Efficacy ◽  
Cross Sectional ◽  
Predictive Values ◽  
Light Emitting

Background The comparatively straightforward and cheaper light-emitting diode fluorescent microscope (LEDFM) was suggested by WHO to replace conventional microscope in tuberculosis (TB) laboratories. However, the comparable efficacy of each of those techniques differs from laboratory to laboratory. We investigated the efficacy of LEDFM for the diagnosis of tuberculous lymphadenitis (TBLN) patients. Methods A cross-sectional study was conducted on 211 samples from clinically suspected tuberculous lymphadenitis patients. Three smears were prepared from FNA on microscope slides for cytomorphology study, Auramine O (AO), and for Ziehl-Neelsen (ZN) staining. The left-over samples were inoculated onto Lowenstein-Jensen (LJ) media. Statistical analysis was done using STATA version 11. The sensitivity, specificity, positive and negative predictive values were calculated by considering the culture results as the gold standard using a 95% confidence interval. Results Among 211 samples 49.7% (105) were positive by cytomorphology, 32.7% (69) by LEDFM, 23.69% (50) by LJ culture, and 13.7% (29) by ZN. Compared to the gold standard sensitivity of ZN, LEDFM, and cytomorphology were 30% [95% CI: 17.9–44.6], 66% [95% CI: 51.2–78.8] 78% [95% CI: 64–88.5], respectively. The specificity of ZN, LEDFM, and cytomorphology was 91.3% [95% CI: 85.8–95.2], 77.6% [95% CI: 70.4–83.8], 58.8% [95% CI: 50.7–66.5], respectively. Conclusion LED fluorescence microscopy gives a legitimate option in contrast to conventional ZN techniques in terms of its higher sensitivity, a bit lower specificity, time-saving, and minimal effort.

a-Si TFT OLED Fabricated on Low-Temperature Flexible Plastic Substrate

2004 ◽  
Vol 814 ◽  
Author(s):  
Kalluri R. Sarma
Keyword(s):  
Low Temperature ◽  
Lower Cost ◽  
Light Emitting Diode ◽  
Plastic Substrate ◽  
Active Matrix ◽  
Light Emitting ◽  
Plastic Substrates ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Superior Image Quality

AbstractActive matrix organic light emitting diode (AM OLED) display fabricated on a flexible plastic substrates has a potential for being lower cost, lighter weight, lower power and highly rugged with superior image quality, compared to the current glass substrate based AM LCDs. Amorphous silicon (a-Si) technology offers the potential for fabricating the required active matrix backplanes on low temperature (< 150°C) plastic substrates for producing flexible AM OLED displays. We have developed low-temperature a-Si TFT processes, and backplane electronics designs to fabricate and successfully demonstrate AM OLEDs using 4”-size flexible plastic substrates. Flexible AM OLED test displays with sizes up to 2×2-inch and resolutions up to 80 cgpi equivalent have been designed and fabricated. The required enabling technologies and fabrication and evaluation of these displays are discussed.

scholarly journals Prevalence, Patterns, and Determinants of Malaria and Malnutrition in Douala, Cameroon: A Cross-Sectional Community-Based Study

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Loick Pradel Kojom Foko ◽  
Nicolas Policarpe Nolla ◽  
Hervé Nyabeyeu Nyabeyeu ◽  
Calvin Tonga ◽  
Leopold Gustave Lehman
Keyword(s):  
Malaria Infection ◽  
Light Emitting Diode ◽  
World Health ◽  
Cross Sectional ◽  
Light Emitting ◽  
Reference Curves ◽  
Health Organization ◽  
Study Participants ◽  
Height For Age ◽  
Weight For Age

Background. Malaria and malnutrition are major public health problems in developing countries. This studywas mainly focused on the prevalence, patterns, and predictors of these conditions and their associations. Methods. A cross-sectional community study was conducted from February to March 2018 among 281 participants living in two districts in Douala. A questionnaire was used to collect sociodemographic information and parasitological and anthropometric data of participants. Nutritional status was determined using age, weight, and height. Body mass index for age (BMIAZ), height-for-age (HAZ), weight-for-age (WAZ), and weight-for-height (WHZ) Z scores were computed based on the World Health Organization growth reference curves. Malaria infection was diagnosed using light-emitting diode fluorescence microscopy. Results. The overall prevalence of malaria was 18.9%, mostly asymptomatic cases. Malaria infection was associated with study site ( p = 0.04 ), age ( p = 0.01 ), WAZ ( p = 0.0049 ), HAZ ( p = 0.03 ), and BMI ( p = 0.02 ). The overall prevalence of malnutrition was 43.1%, and stunting was the main form of malnutrition recorded in children under five years of age (23.6%). The risk of being stunted in this group was about quintupled in malaria-infected participants ( ARR = 4.70 ; p = 0.02 ). In those aged 5-19 years, the prevalence of underweight was significantly higher in malaria-positive individuals as compared to their negative counterparts ( p = 0.02 ). The overall prevalence of malaria and malnutrition cooccurrence was 8.5% and varied with age ( p < 0.0001 ) and study site ( p = 0.04 ). Conclusion and Recommendation. Malaria was associated with malnutrition among the study participants. Early detection and treatment of these ailments would reduce morbidity and mortality.

Sign in / Sign up

Export Citation Format

Share Document