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Influence of the Concrete Block on the Tile Adhesive Strength Measured According to EN 12004 按en12004标准测定混凝土砌块对瓷砖粘结强度的影响
Pub Date : 2023-05-16 DOI: 10.3390/standards3020013
Michael Faatz, Agnes Ehmann
Ceramic tile adhesives (CTA) are playing a dominant role for the business of dry-mix producers. Their quality is classified according to EN 12004. In addition, this standard describes the procedure of a CTA’s performance evaluation. Therefore, a defined ceramic tile, a concrete substrate, and the actual tile adhesive is required. In our study, we investigated the influence of different concrete slabs on the results of two tile adhesives. In two cases, the influence of an additional thermal storage of the concrete slabs was evaluated. The tests were strictly performed according to EN 12004-2:2017. The highest variation for the same tile adhesive was found for the adhesion after heat storage measured on different concrete substrates. With a higher polymer content the influence tended to level out. Additionally, a significant deviation was observed for the adhesion strength after water storage, even causing a lower CTA classification on one substrate. The results of our investigation show that the quality of concrete slabs and their storage conditions should be seriously considered in comparing the performance of tile adhesive according to EN 12004.
瓷砖胶粘剂(CTA)在干混生产商的业务中发挥着主导作用。它们的质量按照en12004进行分类。此外,本标准还描述了CTA的绩效评估程序。因此,需要明确的瓷砖、混凝土基材和实际的瓷砖粘合剂。在我们的研究中,我们研究了不同的混凝土板对两种瓷砖胶粘剂结果的影响。在两种情况下,评估了混凝土板的额外储热的影响。测试严格按照EN 2004-2:2017进行。同一种瓷砖胶粘剂在不同的混凝土基材上测得的蓄热后的附着力变化最大。随着聚合物含量的增加,影响趋于平缓。此外,在储水后观察到粘附强度的显著偏差,甚至导致一个基板上的CTA分类较低。我们的调查结果表明,在比较符合EN 12004标准的瓷砖胶粘剂性能时,应认真考虑混凝土板的质量及其储存条件。
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引用次数: 0
Finest Magic Cloth or a Naked Emperor? The SKQuest Data Set on Software Metrics for Improving Transparency and Quality 最好的魔布还是赤裸的皇帝?用于提高透明度和质量的软件度量的SKQuest数据集
Pub Date : 2023-05-04 DOI: 10.3390/standards3020012
Christian R. Prause, R. Gerlich
Software development has a problem with transparency/visibility. As an intangible product, software and its intermediate development results are hard to see or touch. Customers of custom software have difficulties checking progress, and risk coming out with costly but low-quality software. In the space domain with its often expensive and one-of-a-kind devices, which are developed in complex multitier supply chains, the risk is even greater. This paper presents the SKQuest data set. It contains the completed responses with 190 variables from an empirical study with over 100 software experts. The data set covers distinct aspects of measuring metrics and transparency in software projects. To show what information lies in the data set, the paper investigates, and affirms, from different perspectives, the following questions: Is transparency a problem in software development projects? Is there a desire for more transparency in projects? Can metrics contribute to improving the situation? Moreover, it attempts to replicate the results of an earlier study. The main contribution of this paper is, however, the SKQuest data set that is published with this paper in CSV formatas. It is a tool that enables systematic investigations of software metrics and allows research on how they can improve the efficiency of the software lifecycle, not limited to, but particularly with respect to transparency. Consequently, the paper may serve as a starting point for future research avenues in academia and industry and help to improve existing and future standards in software development.
软件开发有一个透明度/可见性的问题。作为一种无形的产品,软件及其中间开发结果是很难看到或触摸到的。定制软件的客户在检查进度方面有困难,并且冒着成本高但质量低的软件的风险。在复杂的多层供应链中开发的昂贵且独一无二的空间领域,风险甚至更大。本文介绍了SKQuest数据集。它包含了来自100多位软件专家的实证研究的190个变量的完整回答。该数据集涵盖了软件项目中度量度量和透明度的不同方面。为了显示数据集中包含的信息,本文从不同的角度调查并确认了以下问题:透明度在软件开发项目中是一个问题吗?是否希望提高项目的透明度?指标是否有助于改善这种情况?此外,它试图复制早期研究的结果。然而,本文的主要贡献是与本文一起以CSV格式发布的SKQuest数据集。它是一种工具,可以对软件度量进行系统的调查,并允许研究它们如何能够提高软件生命周期的效率,不限于,但特别是在透明度方面。因此,本文可以作为学术界和工业界未来研究途径的起点,并有助于改进软件开发中现有和未来的标准。
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引用次数: 0
Special Issue: Feature Papers to Celebrate the Inaugural Issue of Standards 特刊:为庆祝《标准》创刊而发表的专题论文
Pub Date : 2023-04-17 DOI: 10.3390/standards3020011
Peter Glavič
Standards are a set of guidelines or criteria used to ensure consistency, quality, safety, and compatibility in products, services, and processes [...]
标准是一套指导方针或标准,用于确保产品、服务和流程的一致性、质量、安全性和兼容性[…]
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引用次数: 0
Comparing the Effectiveness of Robust Statistical Estimators of Proficiency Testing Schemes in Outlier Detection 能力测试方案中稳健统计估计量在离群值检测中的有效性比较
Pub Date : 2023-04-06 DOI: 10.3390/standards3020010
D. Tsamatsoulis
This study investigates the effectiveness of robust estimators of location and dispersion, used in proficiency testing and listed in ISO 13528:2015, in outlier detection. The models utilize (a) kernel density plots, (b) Z-factors, (c) Monte Carlo simulations, and (d) distributions derived from at most two contaminating distributions and one main Gaussian. The simulation parameters cover a wide range of those commonly encountered in proficiency testing (PT) schemes, so the results presented are of fairly general application. We chose a functional sub-optimal solution by grouping and classifying the model settings, resulting in five matrices readily usable for selecting the best robust estimator. Whenever at most half of the distribution of each contaminating population is outside the central distribution, there is only one optimal estimator. For all other cases, the five matrices provide the appropriate robust statistic. The proposed method applies to 95.1% of 144 results for an existing PT for cement. These actual datasets indicate that the Hampel estimator for the mean and the Q-method for the standard deviation provide the most appropriate performance statistic in 86.1% of the cases.
本研究调查了在能力测试中使用的位置和分散的鲁棒估计器,并在ISO 13528:2015中列出,在离群值检测中的有效性。这些模型利用(a)核密度图,(b) z因子,(c)蒙特卡罗模拟,以及(d)最多由两个污染分布和一个主高斯分布导出的分布。模拟参数涵盖了能力测试(PT)方案中常见的各种参数,因此所提出的结果具有相当普遍的应用。通过对模型设置进行分组和分类,我们选择了一个功能次优解,从而产生了五个易于用于选择最佳鲁棒估计器的矩阵。当每个污染种群的分布最多有一半在中心分布之外时,只有一个最优估计量。对于所有其他情况,这五个矩阵提供了适当的健壮统计量。所提出的方法适用于现有水泥PT的144个结果中的95.1%。这些实际数据集表明,在86.1%的情况下,均值的Hampel估计器和标准差的q法提供了最合适的性能统计。
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引用次数: 0
A Review of Unmanned Aerial Vehicle Applications in Construction Management: 2016–2021 无人机在施工管理中的应用综述:2016-2021
Pub Date : 2023-04-03 DOI: 10.3390/standards3020009
Andres Acero Molina, Yilei Huang, Yuhan Jiang
With the rapid advancement of Unmanned Aerial Vehicle (UAV) technologies in recent years, their uses have been increasingly adopted in the architecture, engineering, and construction industries. To satisfy the needs of various types of construction projects, a considerable amount of research work has been performed to implement and refine the operations, safety, and accuracy of UAVs. This paper presents the findings of a comprehensive literature review that focuses on UAV research in construction management during the timeframe of 2016 to 2021. A total of 95 papers were identified and collected from a list of 21 relevant journals and conference proceedings, and were then categorized by their research topic, sensor types, and targeted structures. The results of 47 exemplary studies were reported in two categories, namely UAV uses and construction uses. The research topics identified for UAV uses include algorithm, applications, operations, framework, and training, while research topics identified for construction use include inspection, surveying, safety, and monitoring. The connection between the research topics, sensor types, targeted structures, and other advanced technologies were also discussed. This paper summarizes the current results of UAV research in construction management, reviews the methodology, benefits, and limitations of the reviewed literature, and provides valuable knowledge for the future trend of UAV applications in the civil, infrastructure, and construction industries.
近年来,随着无人机技术的快速发展,其应用越来越多地应用于建筑、工程和建筑行业。为了满足各类建设项目的需求,在无人机的操作、安全性和准确性方面进行了大量的研究工作。本文介绍了一项全面的文献综述的结果,该综述侧重于2016年至2021年期间施工管理中的无人机研究。从21份相关期刊和会议论文集中共收集到95篇论文,并根据其研究主题、传感器类型和目标结构进行分类。47个示范研究的结果分为两类,即无人机用途和建筑用途。为无人机用途确定的研究课题包括算法、应用、操作、框架和培训,而为建筑用途确定的研究课题包括检查、测量、安全和监控。讨论了研究课题、传感器类型、目标结构和其他先进技术之间的联系。本文总结了目前无人机在施工管理中的研究成果,综述了文献综述的方法、优势和局限性,为无人机在民用、基础设施和建筑行业的应用提供了有价值的知识。
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引用次数: 4
Quality Improvement of the Forging Process Using Pareto Analysis and 8D Methodology in Automotive Manufacturing: A Case Study 基于Pareto分析和8D方法的汽车制造锻造过程质量改进:一个案例研究
Pub Date : 2023-03-17 DOI: 10.3390/standards3010008
Katarína Lestyánszka Škủrková, H. Fidlerová, Marta Niciejewska, A. Idzikowski
A systematic approach to nonconformity management and continuous improvements are the key elements of the quality management system. The objective of this paper is to present quality improvement for a manufacturing company producing forgings through the combination of several statistical methods and quality control techniques. First, Pareto analysis was applied, followed by the 8D (eight disciplines) methodology using a structured eight-step approach to problem solving following the PDCA (plan-do-check-act) method. The aim was to identify the problem and discover the critical causes of failures in the management system that allowed the problem to occur, by modifying and combining appropriate quality management methods and tools. The paper introduces a case study considering the forging process in the production of gearboxes, where customer complaints were identified in the last year, demanding the need to eliminate failures. Using the mentioned methods, the root cause of the problem was identified and permanent corrective action was planned and implemented according to the recommendations of the 8D report, which made it possible to reduce the likelihood of a recurrence of this problem and increase customer satisfaction.
不符合管理和持续改进的系统方法是质量管理体系的关键要素。本文的目的是通过几种统计方法和质量控制技术的结合,为生产锻件的制造公司提供质量改进。首先,应用了帕累托分析,然后是8D(八个学科)方法,使用结构化的八步骤方法来解决问题,遵循PDCA(计划-执行-检查-行动)方法。其目的是通过修改和组合适当的质量管理方法和工具,识别问题并发现导致问题发生的管理体系失效的关键原因。本文介绍了一个案例研究,考虑齿轮箱生产中的锻造过程,在去年发现了客户投诉,要求消除故障的需要。通过上述方法,发现了问题的根本原因,并根据8D报告的建议计划和实施了永久性纠正措施,从而降低了该问题再次发生的可能性,提高了客户满意度。
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引用次数: 2
Predicting Advanced Air Mobility Adoption Globally by Machine Learning 通过机器学习预测全球先进空中交通的采用
Pub Date : 2023-03-16 DOI: 10.3390/standards3010007
R. Bridgelall
Advanced air mobility (AAM) is a sustainable aviation initiative to deliver cargo and passengers in urban and regional locations by electrified drones. The widespread expectation is that AAM adoption worldwide will help to reduce pollution, reduce transport costs, increase accessibility, and enable a more reliable and resilient supply chain. However, most countries lack regulations that legalize AAM. A fragmented regulatory approach hampers the progress of business prospectors and international organizations concerned with human welfare. Therefore, amidst high uncertainty, knowledge of indicators that can predict the propensity for AAM adoption will help nations and organizations plan for drone use. This research finds predictive indicators by assembling a unique dataset of 36 economic, social, environmental, governance, land use, technology, and transportation indicators for 204 nations. Subsequently, the best of 12 different machine learning models ranks the predictive importance of the indicators. The gross domestic product (GDP) and the regulatory quality index (RQI) developed by the Worldwide Governance Indicators (WGI) project were the two top predictors. Just as importantly, the poor predictors were as follows: the social progress index developed by the Social Progress Imperative, the WGI rule-of-law index, land use characteristics such as rural and urban proportions, borders on open waterways, population density, technology accessibility such as electricity and cell phones, carbon dioxide emission level, aviation traffic, port traffic, tourist arrivals, and roadway fatalities.
先进空中交通(AAM)是一项可持续的航空倡议,通过电动无人机在城市和地区运送货物和乘客。普遍的期望是,全球采用AAM将有助于减少污染,降低运输成本,增加可达性,并实现更可靠和更有弹性的供应链。然而,大多数国家缺乏使AAM合法化的法规。分散的管理办法阻碍了商业勘探者和关心人类福利的国际组织的进展。因此,在高度不确定性的情况下,了解能够预测AAM采用倾向的指标将有助于国家和组织制定无人机使用计划。这项研究通过收集204个国家的36个经济、社会、环境、治理、土地利用、技术和交通指标的独特数据集来找到预测指标。随后,从12个不同的机器学习模型中选出最佳模型对指标的预测重要性进行排名。国内生产总值(GDP)和全球治理指标(WGI)项目制定的监管质量指数(RQI)是两个最重要的预测指标。同样重要的是,较差的预测指标如下:由社会进步迫切需要编制的社会进步指数、WGI法治指数、土地利用特征(如农村和城市比例)、开放水道边界、人口密度、技术可及性(如电力和手机)、二氧化碳排放水平、航空交通、港口交通、游客人数和道路死亡人数。
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引用次数: 0
Application of the FMEA Tool in an Accredited Testing Laboratory in the Context of the ISO/IEC 17025:2017 Standard 在ISO/IEC 17025:2017标准背景下,FMEA工具在认可测试实验室中的应用
Pub Date : 2023-03-01 DOI: 10.3390/standards3010006
P. Blaško, M. Šolc, J. Petrík, L. Girmanová, Andrea Blašková
Organizations and laboratories tend to integrate systems based on risk management. Risk management helps to optimize laboratory processes and information flow, increase valid and reliable results, and make better decisions. This paper describes the development and present trends in risk management related to standard ISO/IEC 17025. This paper focuses on risk assessment in the accredited testing laboratories using the FMEA tool. In the basic eight defined laboratory areas, risks were identified and evaluated, and methods were proposed to minimize them.
组织和实验室倾向于集成基于风险管理的系统。风险管理有助于优化实验室流程和信息流,增加有效和可靠的结果,并做出更好的决策。本文描述了与ISO/IEC 17025标准相关的风险管理的发展和当前趋势。本文重点介绍了利用FMEA工具对认可的检测实验室进行风险评估。在基本的八个确定的实验室区域,风险被识别和评估,并提出了最小化风险的方法。
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引用次数: 0
Food Waste: The Good, the Bad, and (Maybe) the Ugly 食物浪费:好的,坏的,也许是丑陋的
Pub Date : 2023-02-16 DOI: 10.3390/standards3010005
L. Carlsen
Approximately one-third of the food produced globally—close to 1 billion tons—ends up as waste, and, at the same time, more than 800 million people are undernourished, which makes Sustainable Development Goal 12.3, to halve food waste by 2020, rather ambitious if not illusory. In the present study, data on food waste in households, the food service sector, and the retail sector are used as indicators for 78 countries that are analyzed by applying a partial order methodology—allowing all indicators to be taken into account simultaneously—to disclose the “good” (below average) and the “bad” (above average) among the countries on an average scale. Countries such as Belgium, Japan, and Slovenia should be labeled as “good” in this context, whereas the “bad” includes countries such as Nigeria, Rwanda, and Tanzania, countries that must cope simultaneously with severe malnutrition and hunger. This study further includes a search for so-called peculiar countries. Here, the USA and Ireland pop up, as they have very high amounts of waste in their food service sectors due to their eating profiles. Finally, the possible influence of assigning a higher weight to household waste is discussed. The overall objective of this study is to contribute to the necessary decisions that need to be made in order to fight the food waste problem and, thus, fulfill Sustainable Development Goal No. 2—zero hunger. As the world produces enough food for everyone, it is unacceptable that more than 800 million people are undernourished and that 14 million children suffer from stunting; perhaps all countries call for the label “ugly”. The present study contributes to highlighting the food waste problem and suggests specific action points for the studied countries.
全球生产的粮食中,约有三分之一(接近10亿吨)最终成为废物,与此同时,超过8亿人营养不良,这使得到2020年将食物浪费减半的可持续发展目标12.3即使不是不切实际,也相当雄心勃勃。在本研究中,家庭、食品服务部门和零售部门的食物浪费数据被用作78个国家的指标,通过应用部分排序方法(允许同时考虑所有指标)进行分析,以平均规模揭示各国的“好”(低于平均水平)和“坏”(高于平均水平)。在这种情况下,比利时、日本和斯洛文尼亚等国应被列为“好”国家,而尼日利亚、卢旺达和坦桑尼亚等国则属于“坏”国家,这些国家必须同时应对严重的营养不良和饥饿问题。这项研究进一步包括寻找所谓的特殊国家。在这里,美国和爱尔兰出现了,因为他们的饮食习惯导致了食品服务部门的大量浪费。最后,讨论了提高生活垃圾权重可能产生的影响。本研究的总体目标是为应对食物浪费问题做出必要的决策,从而实现可持续发展目标2 -零饥饿。在世界为每个人生产足够粮食的情况下,超过8亿人营养不良,1400万儿童发育迟缓,这是不可接受的;也许所有的国家都要求贴上“丑陋”的标签。本研究有助于突出食物浪费问题,并为研究国家提出具体的行动点。
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引用次数: 0
Successful Innovation Transfer through Pre-Standardization: A Case Study 通过预标准化成功的创新转移:一个案例研究
Pub Date : 2023-02-02 DOI: 10.3390/standards3010004
S. Nehr, Simon Jäckel
This study presents an approach to structure, analyze and evaluate corporate standardization processes using the example of pre-standardization for the reduction of environmental impacts in product design and development. For this purpose, we give a detailed description of the evolution of the European Standard EN 16524 entitled “Mechanical products—Methodology for reduction of environmental impacts in product design and development”. The standardization strategy behind the evolution of EN 16524 is analyzed using the approach of a Business Model Canvas combined with an evaluation using pre-defined success factors. Moreover, we derive general recommendations for corporate standardization professionals in checklists for each field of the underlying Business Model Canvas. With regard to the case study depicted here, we come to the conclusion that pre-standards are especially suited for innovation transfer in the field of emerging and rapidly evolving scientific and technical results.
本研究以减少产品设计和开发中的环境影响的预标准化为例,提出了一种构建、分析和评估企业标准化过程的方法。为此,我们详细描述了欧洲标准EN 16524的演变,题为“机械产品-在产品设计和开发中减少环境影响的方法”。EN 16524演进背后的标准化策略是使用商业模型画布的方法结合使用预定义成功因素的评估来分析的。此外,我们为企业标准化专业人员在检查清单中为底层业务模型画布的每个领域提供一般建议。关于这里描述的案例研究,我们得出结论,预标准特别适合于新兴和快速发展的科学和技术成果领域的创新转移。
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引用次数: 1
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