Personnel Testing and the Search for Alternatives

1984 ◽  
Vol 13 (4) ◽  
pp. 361-374 ◽  
Author(s):  
Bruce W. Davey
Keyword(s):  
Employee Selection ◽  
The Other ◽  
Test Results ◽  
Selection Procedures ◽  
Ability Tests ◽  
Alternative Approaches ◽  
Written Test

Increasing pressure is being applied to replace written ability tests with alternative employee selection procedures. Ironically, such alternatives are usually adopted without examining their validity. The author examines common alternatives to written ability tests and evaluates their typical effectiveness using four major criteria — Validity, fairness, administrative feasibility, and candidate acceptance. This evaluation reveals that there is usually a tradeoff when written tests are replaced with other selection devices, and that the tradeoff usually involves sacrificing validity for one of the other three elements. The author suggests that considering alternative approaches to using written test results may often be more fruitful than abandoning them in favor of non-testing alternatives.

Adding an expansive agent to increase the toughness of steel fibre reinforced concrete

2019 ◽  
Vol 26 (4) ◽  
pp. 197-208
Author(s):  
Leo Gu Li ◽  
Albert Kwok Hung Kwan
Keyword(s):  
Reinforced Concrete ◽  
Steel Fibre ◽  
The Other ◽  
Fibre Reinforced Concrete ◽  
Test Results ◽  
Compressive Properties ◽  
Shrinkage Cracking ◽  
Steel Fibre Reinforced Concrete ◽  
Expansive Agent ◽  
Concrete Matrix

Previous research studies have indicated that using fibres to improve crack resistance and applying expansive agent (EA) to compensate shrinkage are both effective methods to mitigate shrinkage cracking of concrete, and the additions of both fibres and EA can enhance the other performance attributes of concrete. In this study, an EA was added to fibre reinforced concrete (FRC) to produce concrete mixes with various water/binder (W/B) ratios, steel fibre (SF) contents and EA contents for testing of their workability and compressive properties. The test results showed that adding EA would slightly increase the superplasticiser (SP) demand and decrease the compressive strength, Young’s modulus and Poisson’s ratio, but significantly improve the toughness and specific toughness of the steel FRC produced. Such improvement in toughness may be attributed to the pre-stress of the concrete matrix and the confinement effect of the SFs due to the expansion of the concrete and the restraint of the SFs against such expansion.

scholarly journals Evaluating Presence/Absence of Target Microbes in Microbiological Tests

2000 ◽  
Vol 83 (6) ◽  
pp. 1429-1434
Author(s):  
Robert J Blodgett ◽  
Anthony D Hitchins
Keyword(s):  
Performance Studies ◽  
Collaborative Study ◽  
False Negative ◽  
The Other ◽  
Test Results ◽  
Logistic Curve ◽  
Microbiological Method ◽  
Test Portion ◽  
Method Performance ◽  
Data Set

Abstract A typical qualitative microbiological method performance (collaborative) study gathers a data set of responses about a test for the presence or absence of a target microbe. We developed 2 models that estimate false-positive and false-negative rates. One model assumes a constant probability that the tests will indicate the target microbe is present for any positive concentration in the test portion. The other model assumes that this probability follows a logistic curve. Test results from several method performance studies illustrate these estimates.

scholarly journals Effect of Fly Ash on Compressive Strength, Drying Shrinkage, and Carbonation Depth of Mortar with Ferronickel-Slag Powder

2021 ◽  
Vol 11 (3) ◽  
pp. 1037
Author(s):  
Se-Jin Choi ◽  
Ji-Hwan Kim ◽  
Sung-Ho Bae ◽  
Tae-Gue Oh
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Construction Industry ◽  
Bituminous Coal ◽  
Raw Materials ◽  
Drying Shrinkage ◽  
The Other ◽  
Test Results ◽  
Slag Powder ◽  
Ferronickel Slag

In recent years, efforts to reduce greenhouse gas emissions have continued worldwide. In the construction industry, a large amount of CO2 is generated during the production of Portland cement, and various studies are being conducted to reduce the amount of cement and enable the use of cement substitutes. Ferronickel slag is a by-product generated by melting materials such as nickel ore and bituminous coal, which are used as raw materials to produce ferronickel at high temperatures. In this study, we investigated the fluidity, microhydration heat, compressive strength, drying shrinkage, and carbonation characteristics of a ternary cement mortar including ferronickel-slag powder and fly ash. According to the test results, the microhydration heat of the FA20FN00 sample was slightly higher than that of the FA00FN20 sample. The 28-day compressive strength of the FA20FN00 mix was approximately 39.6 MPa, which was higher than that of the other samples, whereas the compressive strength of the FA05FN15 mix including 15% of ferronickel-slag powder was approximately 11.6% lower than that of the FA20FN00 mix. The drying shrinkage of the FA20FN00 sample without ferronickel-slag powder was the highest after 56 days, whereas the FA00FN20 sample without fly ash showed the lowest shrinkage compared to the other mixes.

scholarly journals Generation of an EDS Key Based on a Graphic Image of a Subject’s Face Using the RC4 Algorithm

Information ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 19
Author(s):  
Alexey Semenkov ◽  
Dmitry Bragin ◽  
Yakov Usoltsev ◽  
Anton Konev ◽  
Evgeny Kostuchenko
Keyword(s):  
Image Recognition ◽  
Random Number ◽  
Statistical Test ◽  
The Other ◽  
Test Results ◽  
Random Generation ◽  
Facial Image ◽  
Random Number Generators ◽  
Graphic Image ◽  
High Level

Modern facial recognition algorithms make it possible to identify system users by their appearance with a high level of accuracy. In such cases, an image of the user’s face is converted to parameters that later are used in a recognition process. On the other hand, the obtained parameters can be used as data for pseudo-random number generators. However, the closeness of the sequence generated by such a generator to a truly random one is questionable. This paper proposes a system which is able to authenticate users by their face, and generate pseudo-random values based on the facial image that will later serve to generate an encryption key. The generator of a random value was tested with the NIST Statistical Test Suite. The subsystem of image recognition was also tested under various conditions of taking the image. The test results of the random value generator show a satisfactory level of randomness, i.e., an average of 0.47 random generation (NIST test), with 95% accuracy of the system as a whole.

scholarly journals Challenges and limits of an education for all

2015 ◽  
Vol 12 (2) ◽  
pp. 310-349
Author(s):  
Ana Pires do Prado ◽  
Giselle Carino Lage
Keyword(s):  
School Management ◽  
The Other ◽  
Education For All ◽  
Public High Schools ◽  
The Unconscious ◽  
Selection Procedures ◽  
Management Culture ◽  
The Everyday ◽  
Different Types ◽  
Management Staff

Abstract This paper aims to demonstrate the existence of two different types of school management culture. Data was collected during fieldwork over the academic years 2008 and 2009 in two public high schools in Rio de Janeiro where we observed administrative and pedagogical meetings, classrooms and the everyday life of the schools. From an analysis of the practices and conceptions of management staff, we describe the unconscious grammatical principles that govern the running of the two schools. These becomes particularly clear in the different selection procedures in the two schools, one of them conducting severe criteria for entrance and the other allowing all to enter but few to reach the end of the course. These two recruitment selection practices reveal distinct expectations and beliefs on students' ability (or inability) to learn.

scholarly journals Standardization of a method to study angiogenesis in a mouse model

2013 ◽  
Vol 85 (4) ◽  
pp. 1483-1487
Author(s):  
DAVID FEDER ◽  
FABIO F. PERRAZO ◽  
EDIMAR C. PEREIRA ◽  
SILVANA FORSAIT ◽  
CECILIA K.R. FEDER ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Animal Models ◽  
The Other ◽  
In Vivo Studies ◽  
Specific Method ◽  
Test Results ◽  
Hemoglobin Content ◽  
Physiological Conditions ◽  
Adult Organism

In the adult organism, angiogenesis is restricted to a few physiological conditions. On the other hand, uncontrolled angiogenesis have often been associated to angiogenesis-dependent pathologies. A variety of animal models have been described to provide more quantitative analysis of in vivo angiogenesis and to characterize pro- and antiangiogenic molecules. However, it is still necessary to establish a quantitative, reproducible and specific method for studies of angiogenesis factors and inhibitors. This work aimed to standardize a method for the study of angiogenesis and to investigate the effects of thalidomide on angiogenesis. Sponges of 0.5 x 0.5 x 0.5 cm were implanted in the back of mice groups, control and experimental (thalidomide 200 mg/K/day by gavage). After seven days, the sponges were removed. The dosage of hemoglobin in sponge and in circulation was performed and the ratio between the values was tested using nonparametric Mann-Whitney test. Results have shown that sponge-induced angiogenesis quantitated by ratio between hemoglobin content in serum and in sponge is a helpful model for in vivo studies on angiogenesis. Moreover, it was observed that sponge-induced angiogenesis can be suppressed by thalidomide, corroborating to the validity of the standardized method.

Interpretation of 25-OH-D3, NEFA, and calcium correlations among cow and calf pairs

2025 ◽  
Vol 77 (04) ◽  
pp. 6511-2025
Author(s):  
SONGUL ERDOGAN ◽  
KEREM URAL ◽  
HASAN ERDOGAN ◽  
DENIZ ALIC URAL ◽  
MEHMET GULTEKIN ◽  
...  
Keyword(s):  
Energy Balance ◽  
Vitamin D3 ◽  
Colorimetric Method ◽  
Negative Energy ◽  
The Other ◽  
Negative Energy Balance ◽  
Test Results ◽  
Blood Samples ◽  
Other Hand ◽  
Cow Calf

In the present study, the aim was to determine alteration of NEFA, calcium and vitamin D3 levels in cow and calf pairs at parturition as well as correlation between each parameter levels. For this purpose, a cow-side device employing the enzymatic colorimetric method was used for measurement of NEFA and calcium levels. On the other hand, serum 25(OH)D3 analysis was performed using the fluorescence immunochromatographic method at the laboratory in the Faculty. Blood samples were taken from Vena jugularis of 15 Simmental cow and calf pairs immediately after parturition and placed in serum and heparinized tubes. In cow and calf pairs, concentration of vitamin D3 (15.6-120 and 31.8-120 ng/mL, respectively), NEFA (0.12-1.2 and 0.09-0.8 mmol/L, respectively) and calcium (1.8 ± 0.9 and 2.2 ± 0.6 mmol/L, respectively) were determined. There was no significant correlation between NEFA, Ca, and vitamin D3 in cows and calf pairs. Taking into account several co-factors that influenced test results, which could not easily be excluded, further studies may be warranted with larger cow-calf pair populations. In conclusion, vitamin D3 concentration in calves is not affected by the negative energy balance of dams in the parturition period.

Formulation and Evaluation of Benzoyl Peroxide Injection

2021 ◽  
pp. 198-200
Author(s):  
Ajay Bedadurge ◽  
Mahesh Kadare ◽  
Vinod Matole ◽  
Parikshit Shirure ◽  
Sainath Suryawanshi ◽  
...  
Keyword(s):  
Benzoyl Peroxide ◽  
Functional Groups ◽  
The Other ◽  
Test Results ◽  
Methyl Paraben ◽  
Propyl Paraben ◽  
Sterility Test ◽  
Leakage Test ◽  
Drug Content ◽  
Clear Solution

Objective: The present research has been undertaken for the formulation and evaluation of Benzoyl Peroxide Injection. It is used for Antiacne activity. Methods: Benzoyl peroxide is used as Antiacne. Methyl paraben, Propyl paraben and benzalkoniumchloride were used as preservatives. Water for injection is used as a vehicle. The following parameters were evaluated such as clarity test, leakage test, chearity test, assay and Sterility test. Results: The clearity test shows clear solution. Drug chearity test shows no chear in the vials. Leakage test shows no leakage in the vials. pH and drug content show the F1 batch was better the other batches. IR confirmed that all functional groups are same as benzoyl Peroxide. Conclusion: It was concluded that F1 batch is the good than the other batches. So F1 batch is good for the Parenteral use.

Alternative Approaches to Regional Equity and Racial Justice

2018 ◽  
Author(s):  
Edward G. Goetz
Keyword(s):  
Social Justice ◽  
Community Development ◽  
The Other ◽  
Racial Justice ◽  
Common Goal ◽  
Racial Equity ◽  
Regional Equity ◽  
Alternative Approaches ◽  
The Common ◽  
The One

This chapter provides an overview of two different ways of working towards racial justice and regional equity. The two approaches are integration efforts on the one hand and community development efforts on the other. The tension between these two approaches is described as a conflict among groups that are generally allied on issues of social justice. It is argued that this debate is a tension within a race-conscious policy alliance, and represents a disagreement about how best to achieve the common goal of racial equity.

15. International and global security

2019 ◽  
pp. 240-255
Author(s):  
John Baylis
Keyword(s):  
International Relations ◽  
Case Studies ◽  
International Security ◽  
Democratic Republic Of Congo ◽  
The Other ◽  
China Seas ◽  
Global Security ◽  
Republic Of Congo ◽  
Causes Of War ◽  
Alternative Approaches

This chapter examines whether international relations, especially in an era of increasing globalization, are likely to be as violent in the future as they have been in the past. It asks whether globalization increases or decreases international security, which International Relations theories best help to provide an understanding of global security and insecurity, and what are the most important contemporary threats to international security. The chapter first considers existing disagreements about the causes of war and whether violence is always likely to remain with us. It then discusses traditional/classical realist and more contemporary neorealist and neoliberal perspectives on international security, along with a range of alternative approaches. It also explores recent debates about globalization and geopolitics and presents two case studies, one on the conflict in the Democratic Republic of Congo and the other on growing tensions in the South and East China Seas.

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