130 research outputs found
Extended Armendariz Rings
In this note we introduce central linear Armendariz rings as a generalization
of Armendariz rings and investigate their properties
A Universal Infrared Remote Control
This project consists of building a universal remote controller, which can be used to
control any kind of device capable of communicating its user interface. The remote
device works based on an infrared technology and allows the user to control any of the
home appliances. The idea and design of this project are considered as a multicommunication
between transmitter and receiver, because the remote control device
combines many remotes into one and has an ability to control up to fifteen appliances
that are commonly used at homes. Thetransmitter contains 15 independent inputs and
has a carrier wave frequency of 38 kHz, which is the same for almost all infrared
remote controls. Similarly, the receiver has 15 independent outputs, each of which can
operate separately. The SAA3004 transmitter integrated circuit (IC), which is designed
for infrared remote control systems, is used as a main IC on the remote control itself.
As for receiver part, PIC16C55-XT/P is used as a microcontroller to control the
infrared receiver operations due to the increased number of Input/Output pins. Both
ICs are programmed accordingly to provide a multi- communication. A desktop lamp
and fan are used as the example appliances to be remotely controlled. The control of
these appliances is associated with ON/OFF switching application. Since a remote
control has become a part of the everyday life, in this project, an infrared remote
control system is designed to prove the universality of it
Systematization and classification of e-waste and its harmful effects on health
Today, the waste of electrical and electronic equipment has created a number of global problems, and their solution is as urgent as other environmental problems. The article explores the issues related to the potential danger of e-waste to human health. For this, the data from a number of international normative documents and authoritative journals is collected, systematized and classified. The feasibility of classifying the waste according to the criterion “hazardous-safe” is substantiated. The main goal of the study is to identify the cause-effect relationship between hazardous waste and their harm. The elements and connections of electronic waste, the harmful environment they create, the relationship of pathological conditions related to human health
On Semicommutative Modules and Rings
We say a module MR a semicommutative module if for any m 2 M and any
a 2 R, ma = 0 implies mRa = 0. This paper gives various properties of reduced, Armendariz,
Baer, Quasi-Baer, p:p: and p:q:-Baer rings to extend to modules. In addition
we also prove, for a p.p.-ring R, R is semicommutative iff R is Armendariz. Let R be an
abelian ring and MR be a p:p:-module, then MR is a semicommutative module iff MR is
an Armendariz module. For any ring R, R is semicommutative iff A(R; ®) is semicommutative.
Let R be a reduced ring, it is shown that for number n ¸ 4 and k = [n=2]; Tk
n (R)
is semicommutative ring but Tk¡1
n (R) is not
On Rickart Modules
We investigate some properties of Rickart modules defined
by Rizvi and Roman. Let R be an arbitrary ring with identity
and M be a right R-module with S = EndR(M). A module
M is called to be Rickart if for any f 2 S, rM(f) = Se, for some
e2 = e 2 S. We prove that some results of principally projective
rings and Baer modules can be extended to Rickart modules for this
general settings
On a Class of Semicommutative Modules
Let R be a ring with identity,M a right R-module and S = EndR(M). In this
note, we introduce S-semicommutative, S-Baer, S-q.-Baer and S-p.q.-Baer modules.
We study the relations between these classes of modules. Also we prove if M is an
S-semicommutative module, then M is an S-p.q.-Baer module if and only if M[x] is
an S[x]-p.q.-Baer module, M is an S-Baer module if and only if M[x] is an S[x]-Baer
module, M is an S-q.-Baer module if and only if M[x] is an S[x]-q.-Baer module
On Abelian Rings
Let α be an endomorphism of an arbitrary ring R with identity. In this note, we introduce the notion
of α-abelian rings which generalizes abelian rings. We prove that α-reduced rings, α-symmetric rings,
α-semicommutative rings and α-Armendariz rings are α-abelian. For a right principally projective ring R,
we also prove that R is α-reduced if and only if R is α-symmetric if and only if R is α-semicommutative
if and only if R is α-Armendariz if and only if R is α-Armendariz of power series type if and only if R is
α-abelian
On a Class of Semicommutative Rings
In this paper, a generalization of the class of semicommutative rings is inves-
tigated. A ring R is called central semicommutative if for any a; b 2 R, ab = 0 implies arb
is a central element of R for each r 2 R. We prove that some results on semicommutative
rings can be extended to central semicommutative rings for this general settings
A Universal Infrared Remote Control
This project consists of building a universal remote controller, which can be used to
control any kind of device capable of communicating its user interface. The remote
device works based on an infrared technology and allows the user to control any of the
home appliances. The idea and design of this project are considered as a multicommunication
between transmitter and receiver, because the remote control device
combines many remotes into one and has an ability to control up to fifteen appliances
that are commonly used at homes. Thetransmitter contains 15 independent inputs and
has a carrier wave frequency of 38 kHz, which is the same for almost all infrared
remote controls. Similarly, the receiver has 15 independent outputs, each of which can
operate separately. The SAA3004 transmitter integrated circuit (IC), which is designed
for infrared remote control systems, is used as a main IC on the remote control itself.
As for receiver part, PIC16C55-XT/P is used as a microcontroller to control the
infrared receiver operations due to the increased number of Input/Output pins. Both
ICs are programmed accordingly to provide a multi- communication. A desktop lamp
and fan are used as the example appliances to be remotely controlled. The control of
these appliances is associated with ON/OFF switching application. Since a remote
control has become a part of the everyday life, in this project, an infrared remote
control system is designed to prove the universality of it
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