• Title/Summary/Keyword: Test Effort

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표준관입시험 수행 과정에서의 문제점과 개선방향

  • 백세환
    • Proceedings of the Korean Geotechical Society Conference
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    • 2001.10a
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    • pp.275-280
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    • 2001
  • Although important developments have taken place since ESOPT 1974 both with respect to the test method as well as the interpretation of the results, many uncertainties still remain in the Standard Penetration Test(SPT). The main pitfall of SPT is that it has not been standardized differing from its terminology and further, the possibility of standardization is very low in practice. Therefore, lack of knowledge on the equipment and method of SPT tends to cause some errors in interpretation of the results. It Is especially important to understand this tendency in domestic design, because most foundations are designed based on SPT results only. Many researchers have made an effort to minimize the uncertainties of SPf in Korea, it is not cleary defined what the most effective method of execution and interpretation of SPT Some uncertainties which many geotechnical engineers encounter in practice are introduced to discuss about improvement of test procedure and interpretation.

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In-Use Compliance Emission Testing Analysis Applied in LabVIEW for Engineers

  • Mikhail, Ghaly-Rezk;Lee, Chun-Beom;Choi, Seong-Joo
    • Journal of Practical Engineering Education
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    • v.6 no.2
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    • pp.127-134
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    • 2014
  • Analyzing test data of a vehicle for evaluating its emission performance is an essential process in automotive development field, yet it is intricate and tedious task. In addition, clear understanding and care are required when the analysis process is carried out. Computer software solutions significantly reduce the time and the effort for such analysis. Developing a computer routine to analyze the emission data in a vehicle test demands a complete understanding of the emissions analysis and its related details. In this paper, the principals to develop a LabVIEW analysis routine (VI) are introduced helping automotive engineers comprehend the emission analysis process of a vehicle test data and instruct them to develop similar routines for such analysis.

A Hybrid Approach for Regression Testing in Interprocedural Program

  • Singh, Yogesh;Kaur, Arvinder;Suri, Bharti
    • Journal of Information Processing Systems
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    • v.6 no.1
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    • pp.21-32
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    • 2010
  • Software maintenance is one of the major activities of the software development life cycle. Due to the time and cost constraint it is not possible to perform exhaustive regression testing. Thus, there is a need for a technique that selects and prioritizes the effective and important test cases so that the testing effort is reduced. In an analogous study we have proposed a new variable based algorithm that works on variables using the hybrid technique. However, in the real world the programs consist of multiple modules. Hence, in this work we propose a regression testing algorithm that works on interprocedural programs. In order to validate and analyze this technique we have used various programs. The result shows that the performance and accuracy of this technique is very high.

The Effects of Information Volume and Distribution on Cognitive Load and Recall: Implications for the Design of Mobile Marker-less Augmented Reality

  • LIM, Taehyeong;BONG, Jiyae;KANG, Ji Hei;DENNEN, Vanessa
    • Educational Technology International
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    • v.20 no.2
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    • pp.137-168
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    • 2019
  • This study examined the effects of information volume and distribution on learners' cognitive load and recall in a mobile augmented reality (AR) environment. Information volume refers to the degree of information users are provided in a learning task, while information distribution indicates the way in which information is distributed, either in a virtual or real format. Sixteen undergraduate students participated in the study, which employed a 2 × 3 randomized block factorial design with repeated measures. Information volume and distribution were independent variables, and factors in learners' cognitive load (mental effort, perceived ease of use, and perceived task difficulty) and recall test scores were the dependent variables. Information volume had significant main effects on perceived ease of use and task difficulty, and recall test scores, while information distribution had significant main effects on perceived task difficulty and test scores. A detailed discussion and implications are provided.

Differential Effects of Recovery Efforts on Products Attitudes (제품태도에 대한 회복노력의 차별적 효과)

  • Kim, Cheon-GIl;Choi, Jung-Mi
    • Journal of Global Scholars of Marketing Science
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    • v.18 no.1
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    • pp.33-58
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    • 2008
  • Previous research has presupposed that the evaluation of consumer who received any recovery after experiencing product failure should be better than the evaluation of consumer who did not receive any recovery. The major purposes of this article are to examine impacts of product defect failures rather than service failures, and to explore effects of recovery on postrecovery product attitudes. First, this article deals with the occurrence of severe and unsevere failure and corresponding service recovery toward tangible products rather than intangible services. Contrary to intangible services, purchase and usage are separable for tangible products. This difference makes it clear that executing an recovery strategy toward tangible products is not plausible right after consumers find out product failures. The consumers may think about backgrounds and causes for the unpleasant events during the time gap between product failure and recovery. The deliberation may dilutes positive effects of recovery efforts. The recovery strategies which are provided to consumers experiencing product failures can be classified into three types. A recovery strategy can be implemented to provide consumers with a new product replacing the old defective product, a complimentary product for free, a discount at the time of the failure incident, or a coupon that can be used on the next visit. This strategy is defined as "a rewarding effort." Meanwhile a product failure may arise in exchange for its benefit. Then the product provider can suggest a detail explanation that the defect is hard to escape since it relates highly to the specific advantage to the product. The strategy may be called as "a strengthening effort." Another possible strategy is to recover negative attitude toward own brand by giving prominence to the disadvantages of a competing brand rather than the advantages of its own brand. The strategy is reflected as "a weakening effort." This paper emphasizes that, in order to confirm its effectiveness, a recovery strategy should be compared to being nothing done in response to the product failure. So the three types of recovery efforts is discussed in comparison to the situation involving no recovery effort. The strengthening strategy is to claim high relatedness of the product failure with another advantage, and expects the two-sidedness to ease consumers' complaints. The weakening strategy is to emphasize non-aversiveness of product failure, even if consumers choose another competitive brand. The two strategies can be effective in restoring to the original state, by providing plausible motives to accept the condition of product failure or by informing consumers of non-responsibility in the failure case. However the two may be less effective strategies than the rewarding strategy, since it tries to take care of the rehabilitation needs of consumers. Especially, the relative effect between the strengthening effort and the weakening effort may differ in terms of the severity of the product failure. A consumer who realizes a highly severe failure is likely to attach importance to the property which caused the failure. This implies that the strengthening effort would be less effective under the condition of high product severity. Meanwhile, the failing property is not diagnostic information in the condition of low failure severity. Consumers would not pay attention to non-diagnostic information, and with which they are not likely to change their attitudes. This implies that the strengthening effort would be more effective under the condition of low product severity. A 2 (product failure severity: high or low) X 4 (recovery strategies: rewarding, strengthening, weakening, or doing nothing) between-subjects design was employed. The particular levels of product failure severity and the types of recovery strategies were determined after a series of expert interviews. The dependent variable was product attitude after the recovery effort was provided. Subjects were 284 consumers who had an experience of cosmetics. Subjects were first given a product failure scenario and were asked to rate the comprehensibility of the failure scenario, the probability of raising complaints against the failure, and the subjective severity of the failure. After a recovery scenario was presented, its comprehensibility and overall evaluation were measured. The subjects assigned to the condition of no recovery effort were exposed to a short news article on the cosmetic industry. Next, subjects answered filler questions: 42 items of the need for cognitive closure and 16 items of need-to-evaluate. In the succeeding page a subject's product attitude was measured on an five-item, six-point scale, and a subject's repurchase intention on an three-item, six-point scale. After demographic variables of age and sex were asked, ten items of the subject's objective knowledge was checked. The results showed that the subjects formed more favorable evaluations after receiving rewarding efforts than after receiving either strengthening or weakening efforts. This is consistent with Hoffman, Kelley, and Rotalsky (1995) in that a tangible service recovery could be more effective that intangible efforts. Strengthening and weakening efforts also were effective compared to no recovery effort. So we found that generally any recovery increased products attitudes. The results hint us that a recovery strategy such as strengthening or weakening efforts, although it does not contain a specific reward, may have an effect on consumers experiencing severe unsatisfaction and strong complaint. Meanwhile, strengthening and weakening efforts were not expected to increase product attitudes under the condition of low severity of product failure. We can conclude that only a physical recovery effort may be recognized favorably as a firm's willingness to recover its fault by consumers experiencing low involvements. Results of the present experiment are explained in terms of the attribution theory. This article has a limitation that it utilized fictitious scenarios. Future research deserves to test a realistic effect of recovery for actual consumers. Recovery involves a direct, firsthand experience of ex-users. Recovery does not apply to non-users. The experience of receiving recovery efforts can be relatively more salient and accessible for the ex-users than for non-users. A recovery effort might be more likely to improve product attitude for the ex-users than for non-users. Also the present experiment did not include consumers who did not have an experience of the products and who did not perceive the occurrence of product failure. For the non-users and the ignorant consumers, the recovery efforts might lead to decreased product attitude and purchase intention. This is because the recovery trials may give an opportunity for them to notice the product failure.

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Construction of a Balanced Test Collection for Evaluation of Information Retrieval System (정보 검색 시스템 평가를 위한 균형 테스트 컬렉션 구축)

  • 맹성현;이석훈;이준호;이응봉;송사광
    • Journal of the Korean Society for information Management
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    • v.16 no.2
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    • pp.135-148
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    • 1999
  • There has been some research in Korea on test collections for evaluation of information retrieval (IR) systems. The test collections constructed as an outcome from the research have provided a starting point and opportunities to test Korean IR systems in an objective manner. However, they are well short of the standard practice in the broader IR community in that they are small in their size and usually unbalanced in terms of the characteristics of the documents and the queries (such as the subject domains). In this article, we describe our research effort to alleviate this problem and the resulting test collection, called HANTEC (Hangul TEst Collection). HANTEC is balanced in terms of the subject domains, document lengths, and user types, and currently consists of 120,000 documents divided into three groups: general area, social science area and scienceltechnology area. The 30 queries in the collection are grouped into the same three areas in one dimension and into three distinct user groups in the other dimension.

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Standardized Description Method of Image Acquisition Characteristics Tests for Image Sensors and Modules (이미지 센서 및 모듈의 영상 취득 테스트를 위한 표준화된 기술 방법)

  • Lee, Seongsoo
    • Journal of IKEEE
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    • v.18 no.1
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    • pp.64-76
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    • 2014
  • In the image acquisition tests of image sensors and modules, how to compare pixel values, how to digitize "defect", and how to determine "fault" are extremely varied from test equipments. Therefore, setup of test equipments for image acquisition characteristics should be customized for target devices under test. In general, test procedures are delivered as technical documents in not standardized but arbitrary formats. So test equipment should be manually programmed fitting individual setup condition. This costs huge time and effort and has high risk of human error. In this paper, the standardized description method is proposed to apply to almost all existing tests where various tests are described in a single framework.

Effects of Cryoprotectants and Equilibration Time on the Viability of Frozen-thawed Porcine Oocytes (동결-융해된 돼지난포란의 생존성에 대한 항동해제와 평형시간의 영향)

  • 이장희;김창근;박충생
    • Journal of Embryo Transfer
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    • v.12 no.3
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    • pp.315-324
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    • 1997
  • This study was undertaken in an effort to develop a cryopreservation system of immature and mature porcine oocytes. For this aim, the experiments were designed to examine the effect of cryoprotectants and equdibration time on the viability of frozen-thawed oocytes by using trypan blue(TB) and fluorescene diacetate(FDA) test. The viability of frozen immature oocytes evaluated by TB test was slightly higher than that of frozen mature oocytes. The viability(25.O%) after IVM of frozen-thawed immature oocytes greatly decreased that(42.9%) of oocytes just after thawing, but it was higher than frozen-thawed mature oocytes(15.8%). When immature oocytes were equilibrated for 10, 20 and 30 minutes before freezing the oocyte viability was 20.0, 31.3 and 42.9%, respectively. There was a tendency for long equilibration before oocyte freezing to be more effective for the immature oocytes and a short equilibration time for mature oocytes. Although there was no difference in viability index of frozen oocytes hetween the viability test methods, the index of TB test was slightly higher than that of FDA test. The viability(FDA test) of frozen-immature oocytes with 3 different crtoprotectants was 22.2% for propylene glycol(PG), 9.3% for polyehtylene glycol(PEG) and 65.6% for PG+PEG, in which PG+PEG was more protective against freezing effect.

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How to develop tiered tests: A developmental framework using statistical indexes and four tier types in secondary physics

  • Kim, Min-Kee;Jung, Jin-Sun;Pak, Sung-Jae
    • Journal of The Korean Association For Science Education
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    • v.29 no.3
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    • pp.277-290
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    • 2009
  • In the era of the outcome-based education, multiple-choice test has been widely employed owing to its efficiency that enables educators to evaluate a quantity of students with much objectiveness. However, the prevalent test has not been reconsidered enough to overcome its apparent shortcomings: examiners' effort for developing plausible and faultless distracters defending from every falsification, and students' random guessing on key choices. For alleviating such defects, tiered test as an experimental format of multiple-choice tests has been suggested in science education. Since there has not accumulated much study on the implementation of tiered tests, our research aim is set to construct a framework suggesting statistical indexes for rationally discerning tiered units that develop an effective tiered test. Graded both by our tiered-scoring and by the conventional partial-scoring, the preliminary tiered test in secondary physics attests the improvement in its discrimination and difficulty distribution. The findings reveal that the two indexes discern effective tiered items: discrimination increase (Ct-p) and difficulty decrease (Dp-t). Based on the index information, 4 heterogeneous tier types are recommended in the content of secondary physics: directional manipulation, repeated calculation, diverse explanation, and plural variables.

Does WGB (Work-Growth Balance) Improve Innovative Behavior? (일·성장 균형(WGB:Work-Growth Balance)은 혁신 행동을 향상시키는가?: Process Macro를 활용한 대인 조화와 창의적 노력의 간접 효과를 중심으로)

  • Tak, Kyung-Woon;Suh, Sang-Hyuk
    • Journal of Korea Technology Innovation Society
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    • v.20 no.3
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    • pp.754-780
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    • 2017
  • This study was conducted to investigate whether WGB (Work-Growth Balance), an area of WLB (Work-Life Balance) improves Interpersonal Harmony, Creative Effort and Innovative Behavior in the organization, and whether Interpersonal Harmony and Creative Efforts have indirect effects on the relationship between WGB and Innovative Behavior. To test the hypothesis of this study, PROCESS Macro by Hayes (2013) was used. The results showed that WGB, Interpersonal Harmony, and Creative Effort influenced Innovative Behavior and WGB were variables that influenced Interpersonal Harmony. The variables influencing Creative Effort turned out to be WGB and Interpersonal Harmony. The indirect effect of Interpersonal Harmony and Creative Efforts was also confirmed in the relationship between WGB and Innovative Behavior. In addition, the magnitude of the effect between parameters was examined through Process Macro analysis. It turned out that there is a synergy relationship between WGB, Interpersonal Harmony, Creative Efforts and Innovative Behaviors. In future, more researches on WGB among various industries as well as mediating variables are expected. Further research is needed to study the various parameters of WGB and innovation behavior, and to Balance of Work-Family and Balance of Work-Leisure.