scholarly journals Memorials to John Snow – Pioneer in anaesthesia and epidemiology

2021 ◽  
pp. 096777202110138
Author(s):  
Neil G Snowise
Keyword(s):  
Water Pump ◽  
Cholera Outbreak ◽  
Oral Transmission ◽  
Home Town ◽  
Relevant Today ◽  
Queen Victoria ◽  
Public House ◽  
John Snow ◽  
Water Pumps ◽  
Satisfactory Analgesia

John Snow was an English physician and a founding father of epidemiology, whose name is inextricably linked with tracing the source of the 1854 cholera outbreak in Soho, which killed over 600 people. Despite his recommendation to remove the water pump handle and thus reduce the spread of cholera, his theory of faecal–oral transmission was not widely believed until after his death. Furthermore, he also pioneered substantial achievements in the development of anaesthesia. He studied both chloroform and ether, improving the accuracy of their delivery. In his obstetric practice, he achieved the feat of obtaining satisfactory analgesia with a safer technique and is remembered for administering chloroform to Queen Victoria, during the delivery of her last two children. There are several interesting and unusual memorials to Snow, ranging from replica water pumps, blue plaques and a public house named after him. The most recent new memorial was erected in 2017, in his home town of York, which commemorates his origins and his subsequent contribution to curbing the cholera outbreak. All the memorials commemorate his achievements, which remain relevant today. Public health and epidemiology expertise is required in the current world of the COVID-19 pandemic, where his legacy remains as important as ever.

Seal Lubrication of an Automotive Water Pump

Tribology ◽  
2006 ◽  
Author(s):  
Massimo Antonini ◽  
Rodolfo Faglia ◽  
Carlo Remino ◽  
Marco Pedersoli
Keyword(s):  
Acoustic Emission ◽  
Theoretical Model ◽  
Working Conditions ◽  
Automotive Industry ◽  
Dynamic Instability ◽  
Mechanical Seal ◽  
Water Pump ◽  
Stick Slip ◽  
Grave Problem ◽  
Water Pumps

A noisy mechanical seal is a grave problem, especially in water pumps designed for the automotive industry. The noisiness is often caused by dynamic instability (stick-slip behavior), which occurs when the seal lubrication changes from hydrodynamic to mixed. Starting from this hypothesis, the paper shows a theoretical model that describes the interaction between the seal disks. Therefore this model correlates the acoustic emission to the working conditions of the water pump.

The Use of Water and Water Pumps in Archaeological Excavations

1973 ◽  
Vol 38 (2) ◽  
pp. 218-220
Author(s):  
Richard G. Sense
Keyword(s):  
Gasoline Engine ◽  
Archaeological Site ◽  
Water Pump ◽  
Centrifugal Pumps ◽  
Water Pumps ◽  
Archaeological Excavations ◽  
Dependable Source

AbstractIf an archaeological site is situated near a dependable source of water, a water pump with attached hoses can be utilized to deliver water to screen excavated fill. Screening with water results in the recovery of more and a greater variety of artifacts and non-artifactual materials, and saves time and money. Gasoline-engine powered centrifugal pumps are recommended for most projects.

scholarly journals PENGUJIAN KINERJA PEMBANGKIT LISTRIK TENAGA SURYA UNTUK MENGGERAKKAN POMPA AIR

2018 ◽  
Vol 10 (3) ◽  
pp. 44-47
Author(s):  
Muhammad Anwar ◽  
Zulwisli Zulwisli
Keyword(s):  
Power Plants ◽  
Maximum Yield ◽  
Weather Conditions ◽  
Electrical Energy ◽  
Water Pump ◽  
Solar Panels ◽  
Promising Alternative ◽  
Current Maximum ◽  
Solar Power Plants ◽  
Water Pumps

Solar Power Plants (PLTS) is a promising alternative in the provision of electrical energy. In this study built PLTS to drive the load of water pump. The performance of water pumps is tested under various weather conditions. Performed measurements of some important quantities such as voltage, current and timing of the use of the PLTS to drive the water pump. Maximum yield with a one-hour charge occurs in sunny weather conditions at 11-12 WIB. A one-hour charge can move a 75 watts water pump for two hours. Solar panels are also directed towards the sun position resulting in a 40% increase in power at 12-13 pm. Keywords : PLTS, Output Voltage, Output Current, Maximum Power.

scholarly journals IoT-Based Intelligent Irrigation System for Paddy Crop Using an Internet-Controlled Water Pump

2021 ◽  
Vol 12 (1) ◽  
pp. 21-36
Author(s):  
Brij Bhushan Sharma ◽  
Nagesh Kumar
Keyword(s):  
Irrigation System ◽  
Ph Sensor ◽  
Soil Condition ◽  
Water Pump ◽  
Moisture Sensor ◽  
Soil Moisture Sensor ◽  
Crop Field ◽  
Intelligent Irrigation ◽  
Paddy Crop ◽  
Water Pumps

IoT is a communal association of things or equipment that can interact with each other with the help of an internet connection. IoT services play an imperative responsibility in the industry of agriculture, which can feed 10 billion people worldwide by 2050. Irrigation systems are a backbone of agriculture that help to reduce wastage of water and decide the effective usage of water according to the specific crop and thereby increase the crop yield. In this paper, an irrigation system is developed to supervise the paddy crop field using sensors (soil moisture sensor, pH sensor, and flow sensor), and this irrigation system works based on the concept of IoT, so it is known as intelligent irrigation system (IIS). The soil condition data from sensors are sent to a web server database using wireless transmission to decide how much water needed. In the proposed server database, the data is saved, and the authors use the concept of a dashboard; it operates via http protocol to control water pump of farmland. The condition of soil is monitored based on the parameter of soil-like moisture and water flow amount using the IoT, which is capable to turn on/off water pumps. The used dashboard is developed using open source free server, namely “000webhost.” This paper has considered the paddy crop that is rice because water is essential for growth and development of rice plants. The experimental results show this system is more proficient than the existing conventional and unadventurous irrigation approach.

scholarly journals Analisis Kualitas Daya Listrik Pada Penggunaan Modul Surya Sederhana Untuk Pompa Air Rumah Tangga

Kilat ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 42-52
Author(s):  
Syarif Hidayat Hidayat
Keyword(s):  
Power Factor ◽  
Water Pump ◽  
Measuring Device ◽  
Voltage Distortion ◽  
Harmonic Voltage ◽  
Power Generation System ◽  
Water Pumps ◽  
Incandescent Lamps ◽  
Quality Deviation

The use of solar modules to meet the needs of everyday life is something interesting to use. Harmonics is a phenomenon of power quality deviation that can distort voltage and current waveforms. In this experiment, a simple inverter with 1000 W capability will be used, then will be loaded with water pumps and other household appliances. The method used is to measure the power factor and harmonics generated by using a measuring device. In this process needs to be assessed and will be seen using the ability of the inverter and the quality of the electric power generated in this solar power generation system. Based on the results of measurements and calculations on a water pump with  a power of 680 W and 1 incandescent lamp with a power of 60 Watts, the value of the power factor generated is 0.95 while the total harmonic voltage distortion (THDv) value is when the water pump load is THDv 1.9 % and at THDv incandescent lamps 1.6%.

Development of ABWR Feedwater Pump and Controller Model

2008 ◽  
Author(s):  
Hui-Wen Huang ◽  
Chunkuan Shih ◽  
Hung-Chih Hung ◽  
Shu-Chuan Chen ◽  
Li-Hsin Wang ◽  
...  
Keyword(s):  
Water Level ◽  
Time Lag ◽  
Control Valve ◽  
Steam Line ◽  
Feed Water ◽  
Water Pump ◽  
Software Safety ◽  
Simulation Code ◽  
Feedwater Pump ◽  
Water Pumps

This work developed a stand-alone ABWR (Advanced Boiled Water Reactor) feedwater pump and controller model which was incorporated with a simplified reactor vessel and steam line model. The purpose of this work is to improve the existing model in PCTran-ABWR, a nuclear power plant (NPP) simulation code. INER has been using this computer code as an NPP simulation model for Software Safety Analysis (SSA) and software Fault Injection (FI) of digital instrumentation and control (I&C) research for years. The feedwater pump model includes three turbine-driven feed water pumps and one motor-driven feed water pump. The feedwater controller includes a one-element / three-element water level controller and a specific feedwater speed controller for each feedwater pump. The feed water turbines are driven by the steam from main steam line. As a result, the reactor dome pressure can affect the driving force of the three turbine-driven feed water pumps. It means if the dome pressure becomes low enough, the turbine-driven feed water pumps cannot function normally. The reactor dome pressure transient also affects the pressure difference of feedwater pump discharge pressure and the reactor dome pressure, which can actually affect the feedwater flow rate and reactor water level. The time-lag of feedwater control valve is also considered in this model. Hence, the slower response of turbine-driven feed water pump than that of motor-driven feed water pump can be observed. A number of test cases namely step change of dome pressure, load rejection, and four tests of feedwater pumps transfer were performed in this work to demonstrate the feasibility of dynamic response of this model. Therefore, this model will be implemented into the existing PCTran-ABWR plant simulation code to improve the response of feedwater pump and controller model. This stand-alone model can also be a feedwater control strategy tool to observe the possible responses of various feedwater control architectures.

scholarly journals Karakteristik Pompa Ganda Fotovoltaik Surya

2019 ◽  
Vol 4 ◽  
pp. 7
Author(s):  
Agus Alim
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Power Supply ◽  
Water Pump ◽  
Solar Module ◽  
Final Project ◽  
Project Analysis ◽  
Cell Sources ◽  
Water Pumps ◽  
High Place

<p class="AbstractEnglish"><strong>Abstract:</strong><span> </span>One necessary application of the Solar system is a water pump power supply. The solar cells typically designed solely to drive one load pump, to boost water to a high place, over one motor-pump ought to be thought of. Several completely different or similar water pumps are generated by separate solar cell sources, or the solar cells are combined for the total pump. This final project investigates once two water pumps generated by solar cells are combined, with the condition of solar radiation in Bandung. This final project analysis shows that for a special pump let alone a combined solar cell supply has a bonus. At low insulation, the pump will carry up water and may stop the flow of different pumps to enhance the performance of the opposite pump. As a solar module utilized by Arco Solar, it's the efficiency of 8.8%. Pump one efficiency of 26%, and for pump two the efficiency reaches 14%.</p><p class="AbstrakIndonesia"><strong>Abstrak: </strong>Salah satu penerapan penting dari sistem surya, adalah sebagai catu daya pompa air. Jajaran sel surya biasanya dirancang hanya untuk menggerakkan satu pompa berbeban tunggal saja, untuk menaikkan air ke tempat lebih tinggi perlu dipertimbangkan motor-pompa lebih dari satu. Beberapa pompa air yang berbeda atau sama dapat dibangkitkan oleh sumber sel surya secara terpisah atau sel suryanya digabung untuk keseluruhan pompa. Tujuan penelitian  ini adalah menganalisa bilamana 2 pompa air dibangkitkan oleh sel surya yang digabung, dengan kondisi radiasi surya di Bandung. Penelitian tugas akhir ini menunjukkan bahwa untuk pompa yang berbeda dikopel dengan sumber sel surya gabungan mempunyai keuntungan. Pada insolasi rendah, pompa tersebut sudah dapat mengangkat air dan dapat memutuskan arus pompa lain untuk meningkatkan kinerja dari pompa yang satunya lagi. Sebagai modul surya digunakan Arco Solar, berefisiensi 8,8%. Dari hasil penelitian, diperoleh untuk pompa-1 efisiensi sebesar 26%. Untuk pompa-2 perolehan efisiensi mencapai 14 %</p>

scholarly journals Prototipe Pemantauan Level Air Pada Bendungan Berbasis IOT

2020 ◽  
Vol 1 (02) ◽  
pp. 63-69
Author(s):  
Mardhiyah Nas ◽  
Misnawati ◽  
Megha Rahmawaty Marsing ◽  
Fadlia
Keyword(s):  
Water Level ◽  
Test Results ◽  
Water Pump ◽  
Electronic Components ◽  
Ultrasonic Sensors ◽  
Filling Water ◽  
Distance Data ◽  
Capacity Data ◽  
Water Pumps ◽  
Maximum Limit

The purpose of making this prototype is to make a water level pemantauan tool in the dam using ultrasonic sensors and an IoT system. To support the manufacture of this tool, several other electronic components are used, including the NodeMCU microcontroller, ultrasonic sensors, water pumps, relays, and buzzers. The process of the water level pemantauan system in the IoT-based dam works as a whole. The process begins with filling water from box 1 (analogous to river) to box 2 (analogous to a dam) assisted by a water pump to fill the water box. Then the ultrasonic sensor reads the water distance data from the dam and is sent to the microcontroller and then displayed on ThingSpeak via PC / HP. When box 2 is filled with water and reaches the maximum limit, the buzzer will sound and the relay will turn off the water pump automatically. The test results show that the data obtained is accurate. When the sensor reads the water level capacity data at a distance of 6 cm, the dam capacity will be fully read, the buzzer will sound and turn off the relay automatically then send the information to ThingSpeak. Reading or pemantauan the water level in the dam can be an alternative to control the water level in the dam and facilitate the dam guard.

scholarly journals Inverator Starting Energy Saver Design For Electric Power Efficiency In Water Pumps

2021 ◽  
Vol 5 (1) ◽  
pp. PRESS
Author(s):  
Faisal Irsan Pasaribu ◽  
Noorly Evalina ◽  
Partaonan Harahap
Keyword(s):  
Electric Power ◽  
Power Efficiency ◽  
Electrical Power ◽  
Active Power ◽  
Water Pump ◽  
Inverter Circuit ◽  
Quality Of Electric Power ◽  
The Cost ◽  
Water Pumps

The use of a Water Pump at the initial start is the use of electricity with a large capacity which sometimes faces various kinds of efficiency problems. These problems include an increase in current that occurs in the channel by improving the quality of electric power, especially in the electrical system in the area of the use of the Water Pump, which is expected to be able to improve the quality of electric power. The purpose of the research was to design an inverter starting energy saver as an effort to improve power quality for electricity savings, electric power efficiency in water pumps. This improvement is also expected to be able to reduce the cost of using electricity bills, especially in the use of water pumps. To be able to carry out the improvement of the quality of the electric power, it is necessary to calculate the active power and apparent power when the water pump is used. After performing these calculations, the installation of the inverter starting circuit saver electricity will be used. By carrying out these steps by installing a series of inverters that can improve the quality of electrical power. And by using the inverter circuit starting Energy saver, it is clear that it produces an active power efficiency value of 82% of the active power before using the 272 Watt inverter circuit and active power after using the 223.9 Watt inverter circuit, and also produces an apparent power efficiency value of 83% before using the circuit. inverter 275.18 VA and apparent power after using the inverter circuit 227.94 VA

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