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CR Heating and Cooling was established in 2001. We are a licensed and insured Heating and Air Conditioning company. Our main objective is to create a great service at a reasonable price. As the owner, my vision has stayed the same since the beginning. I have an associate degree accreditation in HVAC and over 12 years of experience in the HVAC industry. Our EPA certified installation manager has acquired over 25 years of experience in the HVAC industry installing residential and commercial systems. Our training and experience has allowed us to stay up to date with the latest cutting-edge technology. We take great pride specializing in the installation and service of Heating and Air conditioning equipment, including the service and installation of geothermal systems. From our CR Heating and Cooling family to yours, we look forward to earning your business.
A Virtual Sensor estimates product objective or process conditions using mathematical models rather than and sometimes in conjunction with physical sensors. These mathematical models use other physical sensor readings to calculate the estimated property or condition. Virtual sensor may provide flexibility, cost effective solutions, promote diversity, ensure security and increase manageability.
The paper presents the modeling, simulation and analysis of an AC-DC converter based PWM rectifier. It provides a suitable control algorithm for a pulse width modulation rectifier which reduces ripple from the DC output side as well as shapes the input current properly. The basic objective of a PWM rectifier is to regulate the DC output voltage and also ensure a sinusoidal input current and unity power factor operation. This is implemented by high speed IGBT switches connected in anti parallel mode across the rectifier diodes
Wireless ad-hoc sensor networks and routing data in them is a significant research area. The objective of this paper is to examine resource depletion attacks at the routing protocol layer, which attempts to permanently disable network nodes by quickly draining their battery power. This type of attack is called as vampire attack. Vampire attacks are very difficult to detect because they attack the node only by sending protocol-compliant messages.
Since long time, it has been noticed that refrigerators are the devices which work almost 365 days round the clock; hence objective of energy efficiency improvement attracts much. There are several ways of improving the performance of a vapor compression refrigeration cycle. Use of an ejector as expansion device is one of the alternative way.
The objective is to have data manipulation capabilities that would allow for sophisticated data analysis of consumer behavior in terms of mistakes, link traversals, length of a visit, and the impact of information content, among others.
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The cost of concrete is governed by the cost of material, plant and labour. The cost of cement is several times higher than the aggregate. Therefore, the objective is to produce the concrete mix as lean as possible and should be economical. That is why designed mixes are preferred to nominal mix. Generally in nominal mixes, cement in higher quantity is used than the designed mixes. Since in production of concrete, the cost of cement is governing factor, therefore, to minimize the cost of concrete, it is essential that concrete mixes must be designed.
The demand for retail banking services is concerned with the demand for the financial services offered in retail/ commercial banks. The general objective of this particular study was to examine the factors affecting customer demand for financial services offered by commercial banks in Nairobi County. The researcher used both primary and secondary data sources. The target group for this study was bank customers from a select 13 of the 43 commercial banks operating in Nairobi County as registered by the Central Bank of Kenya that is; Barclays Bank, CFC Stanbic, Chase Bank, Commercial Bank of Africa, Co-operative Bank of Kenya, Diamond Trust Bank, Equity Bank, Gulf Africa bank, I&M Bank, Kenya Commercial Bank, NIC Bank, Standard Chartered Bank and the United Bank of Africa. From these 13 Banks, a sample population of 115 respondents was drawn for investigation. This sample was selected using stratified random sampling technique. Both open and closed ended questionnaires were use
In this paper M (X ) / G(a,b) /1 queueing system with multiple vacations ,set up time with N-policy and delayed service. If the queue size is b) customers in the queue .(ie) the server finds at least N customers waiting for service , then he requires a setup time R to start the service. After the setup he servers a batch of b customers where b a. various Characteristics of the queueing system are presented in this paper.