Need answer within 15 mins! Urgent! (C) List 3 types of point defect.pdf
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Need answer within 15 mins! Urgent! (C) List 3 types of point defects, and briefly explain the characteristics of each defects. Solution Point defects include self interstitial atoms, interstitial impurity atoms, substitutional atoms and vacancies. 1.Self interstitial atoms :. A self interstitial atom is an extra atom that has crowded its way into an interstitial void in the crystal structure. 2. Interstitial impurity atoms:Interstitial impurity atoms fit into the open space between the bulk atoms of the lattice structure. An example of interstitial impurity atoms is the carbon atoms that are added to iron to make steel 3.Substitutional atoms:A substitutional impurity atom is an atom of a different type than the bulk atoms, which has replaced one of the bulk atoms in the lattice. 4.Vacancies : Vacancies are empty spaces where an atom should be, but is missing. They are common, especially at high temperatures when atoms are frequently and randomly change their positions leaving behind empty lattice sites..
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Need explanations.pdf
Need explanations
Solution
3.
alpha,a=0.05 x=102 n=16 s=4
t(a/2,n-1) = t(0.025,15) = 2.131
confidence interval:
x +/- [t(a/2,n-1) * (s/sqrt(n))]
102 +/- 2.13
= (99.87 to 104.13)
option B
4.
B) When population standard deviation is unknown
5.
n=12
confidence interval:
u +/- [t(a/2,n-1) * (s/sqrt(n))]
u - [t(a/2,n-1) * (s/sqrt(n))] = 0
u + [t(a/2,n-1) * (s/sqrt(n))] = X
add them we get 2u = X
or u = X/2
option A.
Need Expert to help . Need to develop a small research about Gaibor .pdf
Need Expert to help . Need to develop a small research about Gaibor Filter. Please post accurate
answer. thank you
Solution
In image processing, a Gabor filter, named after Dennis Gabor, is a linear filter used for edge
detection. Frequency and orientation representations of Gabor filters are similar to those of the
human visual system, and they have been found to be particularly appropriate for texture
representation and discrimination. In the spatial domain, a 2D Gabor filter is a Gaussian kernel
function modulated by a sinusoidal plane wave.
Simple cells in the visual cortex of mammalian brains can be modeled by Gabor functions.Thus,
image analysis with Gabor filters is thought to be similar to perception in the human visual
system.
Its impulse response is defined by a sinusoidal wave (a plane wave for 2D Gabor filters)
multiplied by a Gaussian function.[3] Because of the multiplication-convolution property
(Convolution theorem), the Fourier transform of a Gabor filter\'s impulse response is the
convolution of the Fourier transform of the harmonic function and the Fourier transform of the
Gaussian function. The filter has a real and an imaginary component representing orthogonal
directions.[4] The two components may be formed into a complex number or used individually.
Complex
g(x,y;\\lambda,\\theta,\\psi,\\sigma,\\gamma) = \\exp\\left(-
\\frac{x\'^2+\\gamma^2y\'^2}{2\\sigma^2}\
ight)\\exp\\left(i\\left(2\\pi\\frac{x\'}{\\lambda}+\\psi\ ight)\ ight)
Real
g(x,y;\\lambda,\\theta,\\psi,\\sigma,\\gamma) = \\exp\\left(-
\\frac{x\'^2+\\gamma^2y\'^2}{2\\sigma^2}\ ight)\\cos\\left(2\\pi\\frac{x\'}{\\lambda}+\\psi\ ight)
Imaginary
g(x,y;\\lambda,\\theta,\\psi,\\sigma,\\gamma) = \\exp\\left(-
\\frac{x\'^2+\\gamma^2y\'^2}{2\\sigma^2}\ ight)\\sin\\left(2\\pi\\frac{x\'}{\\lambda}+\\psi\ ight)
where
x\' = x \\cos\\theta + y \\sin\\theta\\,
and
y\' = -x \\sin\\theta + y \\cos\\theta\\,
In this equation, \\lambda represents the wavelength of the sinusoidal factor, \\theta represents
the orientation of the normal to the parallel stripes of a Gabor function, \\psi is the phase offset,
\\sigma is the sigma/standard deviation of the Gaussian envelope and \\gamma is the spatial
aspect ratio, and specifies the ellipticity of the support of the Gabor function.
Gabor filters are directly related to Gabor wavelets, since they can be designed for a number of
dilations and rotations. However, in general, expansion is not applied for Gabor wavelets, since
this requires computation of bi-orthogonal wavelets, which may be very time-consuming.
Therefore, usually, a filter bank consisting of Gabor filters with various scales and rotations is
created. The filters are convolved with the signal, resulting in a so-called Gabor space. This
process is closely related to processes in the primary visual cortex.[7] Jones and Palmer showed
that the real part of the complex Gabor function is a good fit to the receptive field weight
functions found in simple cells in a cat\'s striat.
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Need explanations.pdf
Need explanations
Solution
3.
alpha,a=0.05 x=102 n=16 s=4
t(a/2,n-1) = t(0.025,15) = 2.131
confidence interval:
x +/- [t(a/2,n-1) * (s/sqrt(n))]
102 +/- 2.13
= (99.87 to 104.13)
option B
4.
B) When population standard deviation is unknown
5.
n=12
confidence interval:
u +/- [t(a/2,n-1) * (s/sqrt(n))]
u - [t(a/2,n-1) * (s/sqrt(n))] = 0
u + [t(a/2,n-1) * (s/sqrt(n))] = X
add them we get 2u = X
or u = X/2
option A.
Need Expert to help . Need to develop a small research about Gaibor .pdf
Need Expert to help . Need to develop a small research about Gaibor Filter. Please post accurate
answer. thank you
Solution
In image processing, a Gabor filter, named after Dennis Gabor, is a linear filter used for edge
detection. Frequency and orientation representations of Gabor filters are similar to those of the
human visual system, and they have been found to be particularly appropriate for texture
representation and discrimination. In the spatial domain, a 2D Gabor filter is a Gaussian kernel
function modulated by a sinusoidal plane wave.
Simple cells in the visual cortex of mammalian brains can be modeled by Gabor functions.Thus,
image analysis with Gabor filters is thought to be similar to perception in the human visual
system.
Its impulse response is defined by a sinusoidal wave (a plane wave for 2D Gabor filters)
multiplied by a Gaussian function.[3] Because of the multiplication-convolution property
(Convolution theorem), the Fourier transform of a Gabor filter\'s impulse response is the
convolution of the Fourier transform of the harmonic function and the Fourier transform of the
Gaussian function. The filter has a real and an imaginary component representing orthogonal
directions.[4] The two components may be formed into a complex number or used individually.
Complex
g(x,y;\\lambda,\\theta,\\psi,\\sigma,\\gamma) = \\exp\\left(-
\\frac{x\'^2+\\gamma^2y\'^2}{2\\sigma^2}\
ight)\\exp\\left(i\\left(2\\pi\\frac{x\'}{\\lambda}+\\psi\ ight)\ ight)
Real
g(x,y;\\lambda,\\theta,\\psi,\\sigma,\\gamma) = \\exp\\left(-
\\frac{x\'^2+\\gamma^2y\'^2}{2\\sigma^2}\ ight)\\cos\\left(2\\pi\\frac{x\'}{\\lambda}+\\psi\ ight)
Imaginary
g(x,y;\\lambda,\\theta,\\psi,\\sigma,\\gamma) = \\exp\\left(-
\\frac{x\'^2+\\gamma^2y\'^2}{2\\sigma^2}\ ight)\\sin\\left(2\\pi\\frac{x\'}{\\lambda}+\\psi\ ight)
where
x\' = x \\cos\\theta + y \\sin\\theta\\,
and
y\' = -x \\sin\\theta + y \\cos\\theta\\,
In this equation, \\lambda represents the wavelength of the sinusoidal factor, \\theta represents
the orientation of the normal to the parallel stripes of a Gabor function, \\psi is the phase offset,
\\sigma is the sigma/standard deviation of the Gaussian envelope and \\gamma is the spatial
aspect ratio, and specifies the ellipticity of the support of the Gabor function.
Gabor filters are directly related to Gabor wavelets, since they can be designed for a number of
dilations and rotations. However, in general, expansion is not applied for Gabor wavelets, since
this requires computation of bi-orthogonal wavelets, which may be very time-consuming.
Therefore, usually, a filter bank consisting of Gabor filters with various scales and rotations is
created. The filters are convolved with the signal, resulting in a so-called Gabor space. This
process is closely related to processes in the primary visual cortex.[7] Jones and Palmer showed
that the real part of the complex Gabor function is a good fit to the receptive field weight
functions found in simple cells in a cat\'s striat.
need a paper on research hypothesis.Solution Steps in Formulati.pdf
need a paper on research hypothesis.
Solution
Steps in Formulating a Hypothesis Decide what you want to explain: choose a dependent
variable Your dependent variable must show variation Run Descriptives to see mean and
dispersion statistics Even better, run Frequencies, and call for a histogram along with the mean
and std. dev (suppress the Frequency table itself) Choose independent variables that also show
variation One can\'t explain variation in a dependent variable with an independent variable that
doesn\'t vary. Moreover, the variation in the independent must match that in the dependent
variable. Otherwise, they can\'t possibly covary, which is needed for the covariation needed in
correlation. Examples of lack of theoretical potential: Voting for Clinton in 1996 in the suburb of
Winnetka can\'t be explained by race, for race does not vary much in Winnetka. Variation across
time in deaths in domestic violence within nations can\'t be explained by ethnic diversity, for
ethnicity doesn\'t change much across time within a nation. However, variation in deaths across
nations can be related to variation in ethnic diversity across nations. Think of multiple causes of
the dependent variable: Do two or more independent variables combine to affect it? Consider
using multiple regression to deal with multiple causes. Does a relationship hold for some units of
analysis but not others? For northern states but not for southern ones? For European nations but
not for Third World nations? For whites, but not for blacks? For reformed cities, but not
unreformed cities? For multi-party states, but not single-party states? Try to develop your
analysis so that it considers all the cases, even if the relationship doesn\'t apply equally to them.
Consider alternative measures of both the dependent and independent variables..
National Supply’s shareholders’s equity included the following accou.pdf
National Supply’s shareholders’s equity included the following accounts at Dec, 31 2012
Shareholders’ equity in millions
Common stock, 6 million shares at $1 par $6,000,000
Paid-in capital-excess of Par $30,000,000
Retained Earnings $86,500,000
1. National Supply reacquired shares of is common stock in two separate transaction and later
sold shares. Prepare the entries for each of the transactions under each of two separate
assumptions: the shares are (a) retired and (b) accounted for as treasury stock.
Feb 15, 2013 Reacquried 300,000 shares at $8 per share
Feb 17, 2014 Reacquired 300,000 shares at $ 5.50 per share
Nov 9, 2015 Sold 200,000 shares at $ 7 per share (assume FIFO cost)
2. Prepare the shareholders’ equity section of National Supply’s balance sheet at Dec 31, 2015
assuming the shares are (a) retired and (b) accounted for as treasury stock. Net income was $14
million in 2013, $15 million in 2014, and $16 million in 2015. No dividends were paid during
the there -year period.
Solution
Question 2 is not answeredDateParticularsDebitCredit15-Feb-13Treasury
Stock2400000Cash240000017-Feb-14Treasury Stock1650000Cash165000009-Nov-
15Cash1400000Paid in Capital Treasury stock200000Treasury Stock1600000.
National level or aggregate level data and firm-level data are self .pdf
National level or aggregate level data and firm-level data are self explanatory. I have seen certain
papers on productivity analysis as well as other topics which refer to \"establishment-level\" data.
Can someone please explain what is meant by this term?
Solution
Establishments are firms at the facility level. Think about it like branches: If a firm has three
different branches, each of these branches counts as an establishment. If a firm has no branches,
the firm itself is the (sole) establishment..
Name two applications of decodersWhat is the enable line function.pdf
Decoders are used to analyze data streams for a certain data code and provide an output if the data matches an address for a device. Some applications of decoders include memory chips, microprocessor input/output systems, and microprocessor memory chips. Decoder with an enable input line will function as a demultiplexer.
Name the three basic categories of materials............Automation.pdf
Name the three basic categories of materials............
Automation final
Solution
The three basic categories of engineering materials are
(1) metals,
(2) ceramics, and
(3) polymers.
A fourth category, composites, is a non-homogeneous mixture of the other types and
therefore is not a basic category..
Name the type of modulation used in most passive tags(RFID).Solu.pdf
Name the type of modulation used in most passive tags(RFID).
Solution
Radio frequency identification (RFID) system is used to identify the locate and track peoples
assets. In this few types of modulation techniques used for easy tracking and for promptness.
Those are Amplitude modulation for loading the readers transmitted and provides a
communication path back to the reader. Further used Data modulation technique’s or encoder
technique’s..
Name that test! A researcher is interested in discovering whether or.pdf
Name that test! A researcher is interested in discovering whether or not there is a relationship
between supervisor support and burnout. He collects data from a random sample of individuals
who self-report their levels of perceived supervisor support (on a scale of 1-5) and burnout (on a
scale of 1-5). Which statistical test is most appropriate for this researcher to use? a.
independent samples t-test b. Chi-square c. ANOVA d. None of these e. Matched pairs t-test
f. regression g. correlation
Solution
The role of developmental services workers (DSWs) is undergoing major changes.
Fewer people are entering the occupation, and at the same time, those currently in the occupation
are leaving at increasing rates, presumably due to high stress levels and burnout. Some reasons
for this phenomenon are the type of work preformed by DSWs (providing personal/emotional
care) and working conditions (shift work, part-time, low wages). This research used field
observation at locations within a developmental services agency and semi-structured interviews
with five participants working in the developmental services field, including front line staff and
management. The participants were asked to identify job challenges and gather
opinions/suggestions for improving low retention rates and high burn out rates. The participants
spoke about ways to improve the quality of care provided to people with developmental
disabilities. Although this is a very small sample, all of the participants were aware that burnout
rates are quite high for DSWs. The opinions of front line workers and management reflect the
similarities and minor differences between these groups. The participants believe burnout can be
reduced and retention improved by: increasing pay rates, improving working hours, creating
safer work conditions, increasing support from management, ensuring staff have an interest in
vulnerable populations, and increasing the availability of meaningful training. Development
Services Workers (DSWs) are specially trained individuals who provide personal care and non-
professional services to people with developmental disabilities. Even though these individuals
provide an important service that greatly improves the quality of life for people with
developmental disabilities, it is becoming increasingly difficult to recruit and retain DSWs. This
research examines the role of the DSWs and attempts to identify some of the factors that
contribute to the declining ability to attract individuals to this type of employment, and the
factors that make it difficult to retain individuals in this field. The importance of the level of
service provided by DSWs to individuals with developmental disabilities reinforces the need to
ensure this field of service remains viable and attractive to individuals seeking a career in
personal care. This research also provides some recommendations for changes that will improve
recruitment and retention of DSWs. Ontario has a long history of providing .
name some common of cross-sectional surveys objectivesSolution .pdf
name some common of cross-sectional surveys objectives?
Solution
Cross-sectional studies (also known as cross-sectional analyses, transversal studies,
prevalence study) form a class of research methods that involve observation of all of a
population, or a representative subset, at one specific point in time. They differ from case-control
studies in that they aim to provide data on the entire population under study, whereas case-
control studies typically include only individuals with a specific characteristic, with a sample,
often a tiny minority, of the rest of the population. Cross-sectional studies are descriptive studies
(neither longitudinal nor experimental). Unlike case-control studies, they can be used to describe,
not only the Odds ratio, but also absolute risks and relative risks from prevalences (sometimes
called prevalence risk ratio, or PRR).[1][2] They may be used to describe some feature of the
population, such as prevalence of an illness, or they may support inferences of cause and effect.
Longitudinal studies differ from both in making a series of observations more than once on
members of the study population over a period of time..
Name and describe the four major sets of variables that might be use.pdf
Name and describe the four major sets of variables that might be used in segmenting healthcare
consumer markets.
Solution
The four major sets of variables that might be used in segmenting consumer markets for every
industry including the healthcare consumer markets are as follows:
1. Geographic: This variable consisits of matters of location, population, density, climate etc.In a
healthcare consumer market the geographical factors like the population and climate of the place
near the healthcare facility effects the consumer market as it should be located where maximum
people can come for there services.
2. Demographic: They are the variables like age, gender, occupation, religion or income.
Healthcare facility should be located where there are elderly people living as they will need the
services more and if high income group people are living near by then the facility can generate
generous amount of profits.
3. Psychographic: They are the variables like personalities, lifestyles, or social class.All these
variables matter a lot to any of the consumer markets.
4. Behavorial: A behavioral variable would be something for a special occasion, benefits, loyalty
status, or usage rate..
Name and explain briefly the TWO ways in which GDP may be calculated.pdf
Name and explain briefly the TWO ways in which GDP may be calculated.
Solution
GDP represents the total dollar value of all goods and services produced over a specific time
period. In short, it\'s everything produced by people and businesses, including salaries of
workers.
The two ways in which GDP can be calculated are:
Expenditures Approach: This method uses the adding up all the expenditure done by the people
and government
GDP = C + I + G + (X-M), where consumption (C), investment (I), government spending (G)
and net exports (X – M)
Income Approach: In this method the income of all the people and government is added
NI = W + R + i + PR, where Labor Income (W) Rental Income (R) Interest Income (i) Profits
(PR).
n Monopoly one rolls a pair of dice. Find the probability of getting.pdf
n Monopoly one rolls a pair of dice. Find the probability of getting a sum of 4.
Solution
In monopoly sum on the dice getting 4 is considered as an event Then n(A) = 3
ways (2,2), (1,3),(3,1) Total combinations of events = N = 36 So, the probability of getting sum
4 on pair of dice i.e. the probability of the event A = P(A) = 3/36 = 1/12..
N persons stand on the circumference of a circle at distinct points..pdf
N persons stand on the circumference of a circle at distinct points. Each possible pair of
persons, not standing next to each other, sings a two-minute song one pair after the
other. If the total time taken for singing is 28 minutes, what is N?
Solution
Each person will form a pair with all other persons except the two beside him. Hence he
will form (n – 3) pairs. If we consider each person, total pairs = n (n – 3) but here each
pair is counted twice.
Hence actual number of pairs =
n(n – 3)/2
They will sing for × =n(n – 3)x2/2
n(n–3) min
Hence n(n –3) = 28
n^2 – 3n – 28 = 0
n = 7 or – 4
Discarding the –ve value: n = 7.
n a study reported in the September 24, 2007, of Archives of Interna.pdf
n a study reported in the September 24, 2007, of Archives of Internal Medicine, German
researchers described a study conducted on 1162 German adults suffering from chronic low-back
pain. These subjects were randomly assigned to one of three groups: real acupuncture, sham
acupuncture, or conventional therapy. Researchers found that 47% of subjects in the real
acupuncture group improved compared to 44% in the sham acupuncture group and 27% in the
conventional therapy group. b) Report the appropriate degrees of freedom for this test.
Solution
df = 1162 - 1 = 1161.
n urn contains one black and n-1 white balls. Balls are drawn at ran.pdf
n urn contains one black and n-1 white balls. Balls are drawn at random until the black ball is
selected. each ball is replaced before the next ball is drawn. find the probability that at least n
draws are needed. what happens as n goes to infinity
Solution
there is 1/n chance to draw a black ball=(1 black/ (1 black + n-1 white)) = 1/n
since n tends to infinity the probability leads to zero.
My university is not listed, I currently attend University of Regi.pdf
My university is not listed,
I currently attend University of Regina, in Regina,Sk, Canada.
what should i do?
Solution
name of the university doesnt matter ..u just select the na=earest and the best
university,,,that will do.. no need to worry.
Multiple Choise questionQUESTION 1Which of the following is a m.pdf
The document contains 25 multiple choice questions about monetary policy and the Federal Reserve. The questions cover topics such as the goals of monetary policy, the tools used by the Fed like open market operations and interest rate changes, the transmission mechanism of monetary policy, and the effects of monetary policy on macroeconomic variables. The questions require choosing the correct answer from the given options to demonstrate an understanding of how monetary policy works in the US.
multiple-choice questions a. Which of the following does the Fina.pdf
multiple-choice questions:
a. Which of the following does the Financial Accounting Standards Board not issue?
1. SOPs
2. SFASs
3. Interpretations
4. Technical bulletins
5. SFACs
b. According to SFAC No. 6, assets can be defined by which of the following?
1. Probable future sacrifices of economic benefits arising from present obligations of a particular
entity to transfer assets or provide services to other entities in the future as a result of past
transactions or events
2. Probable future economic benefits obtained or controlled by a particular entity as a result of
past transactions or events
3. Residual interest on the assets of an entity that remains after deducting its liabilities
4. Increases in equity of a particular business enterprise resulting from transfers to the enterprise
from other entities of something of value to obtain or increase ownership interests (or
equity) in it
5. Decrease in equity of a particular business enterprise resulting from transferring assets,
rendering
services, or incurring liabilities by the enterprise
c. According to SFAC No. 6, expenses can be defined by which of the following?
1. Inflows or other enhancements of assets of an entity or settlements of its liabilities (or a
combination
of both) from delivering or producing goods, rendering services, or other activities
that constitute the entity’s ongoing major or central operations
2. Outflows or other consumption or using up of assets or incurrences of liabilities (or a
combination
of both) from delivering or producing goods, rendering services, or carrying out other
activities that constitute the entity’s ongoing major or central operations
3. Increases in equity (net assets) from peripheral or incidental transactions of an entity and
from all other transactions and other events and circumstances affecting the entity during a
period, except those that result from revenues or investments
4. Decreases in equity (net assets) from peripheral or incidental transactions of an entity and
from all other transactions and other events and circumstances affecting the entity during a
period, except those that result from expenses or distributions to owners
5. Probable future economic benefits obtained or controlled by a particular entity as a result of
past transactions or events.
d. SFAC No. 5 indicates that an item, to be recognized, should meet four criteria, subject to the
costbenefit
constraint and the materiality threshold.Which of the following is not one of the four criteria?
1. The item fits one of the definitions of the elements.
2. The item has a relevant attribute measurable with sufficient reliability.
3. The information related to the item is relevant.
4. The information related to the item is reliable.
5. The item has comparability, including consistency.
e. SFAC No. 5 identifies five different measurement attributes currently used in practice. Which
of the following is not one of the measurement attributes currently used in practice?
1. Historical .
Multiple Choice Marketing questions Please helpQuestion 1The gro.pdf
Multiple Choice Marketing questions Please help
Question 1
The group of people to whom a firm directs its marketing efforts is known as its
1)captive markets
consumer market
3)strategic market
4)target market
Question 2
Information collected for the first time specifically for a marketing research study is called
1)secondary data
2)primary data
3)soft data
4)focus data
Question 3
A buyer\'s market is characterized by
1)available goods and services in excess of the demand for them
2)consumer demand in excess of available supply
3)extensive shortages of certain types of basic goods
4)practically no competition in the marketplace
Question 4
The overall marketing planning process begins with activities to define the firm\'s
1)budget
2)organization-wide goals
3)mission
4)executive team
Question 5
\"Just Say NO to Drugs\" is an example of which of the nontraditional types of marketing?
1)cause marketing
2)lace marketing
3)event marketing
4)organization marketing
Question 6
\"On-the-street\" interviews conducted by a broadcaster are good examples of
1)media sampling
2)convenience sampling
3)cluster sampling
4)stratified sampling
Question 7
The term \"marketing mix\" describes
1)a composite analysis of all environmental factors inside and outside the firm
2)a series of business decisions that aid in selling a product
3)a blending of four strategic elements to satisfy specific target markets
4)the resources and skills that form the foundation of the firm\'s opportunities
Question 8
Assume that PepsiCo were to purchase the Coca-Cola Company. On which of the environments
of marketing would you expect such a move to have the greatest effect?
1)social
2)economic
3)technological
4)competitive
Question 9
If one of your products has been classified as a \"cash cow,\" the strategy marketing specialists
would recommend that you pursue would be to
1)maintain its present status for as long as possible.
2)push the product with extensive promotion to increase market share.
3)pull out of the market before costs are greater than revenues.
4)aim for the lowest market share that will still keep you producing,
Question 10
According to Theodore Levitt in his work on marketing myopia, the future growth of a firm is
endangered when management is
1)committed to a philosophy of customer orientation.
2)aware of the scope of its business.
3)committed to a product-oriented philosophy.
4)aggressive in pursuing emerging markets.
Question 11
Primary data are
1)newly-collected data resulting from a research study.
2)less time-consuming to acquire and less costly than secondary data.
3)newly-published results of government investigations.
4)often in an unusable format or chronologically useless.
Question 12
The efforts of the Georgia Tech Alumni Association to convince graduates to cotribute to the
annual \"Roll Call\" program to raise funds to supplement faculty salaries is an example of
1)place marketing
2)event marketing
3)sports marketing
4)organization marketing
Question 13
Mo.
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spot a liar (Haiqa 146).pptx Technical writhing and presentation skills
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Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...
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Level 3 NCEA - NZ: A Nation In the Making 1872 - 1900 SML.ppt
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Need answer within 15 mins! Urgent! (C) List 3 types of point defect.pdf
- 1. Need answer within 15 mins! Urgent! (C) List 3 types of point defects, and briefly explain the characteristics of each defects. Solution Point defects include self interstitial atoms, interstitial impurity atoms, substitutional atoms and vacancies. 1.Self interstitial atoms :. A self interstitial atom is an extra atom that has crowded its way into an interstitial void in the crystal structure. 2. Interstitial impurity atoms:Interstitial impurity atoms fit into the open space between the bulk atoms of the lattice structure. An example of interstitial impurity atoms is the carbon atoms that are added to iron to make steel 3.Substitutional atoms:A substitutional impurity atom is an atom of a different type than the bulk atoms, which has replaced one of the bulk atoms in the lattice. 4.Vacancies : Vacancies are empty spaces where an atom should be, but is missing. They are common, especially at high temperatures when atoms are frequently and randomly change their positions leaving behind empty lattice sites.