Transformations of Check Constraint PIM Specifications

Platform independent modeling of information systems and generation of their prototypes play an important role in software development process. However, not all tasks in this process have been covered yet, i.e. not all pieces of an information system can be designed using platform independent artifacts that are later transformable into the executable code. One of the examples is modeling of database check constraints, for which there is a lack of appropriate mechanisms to formally specify them on a platform independent level. In order to provide formal specification of check constraints at platform independent level, we developed a domain specific language and embedded it into a tool for platform independent design and automated prototyping of information systems, named Integrated Information Systems CASE (IIS*Case). In this paper, we present algorithms for transformation of check constraints specified at the platform independent level into the relational data model, and further transformation into the executable SQL/DDL code for several standard and commercial platforms: ANSI SQL-2003, Oracle 9i and 10g, and MS SQL Server 2000 and 2008. We have also implemented these algorithms in IIS*Case as a part of the process of generation of relational database schema

Creating Relationships for Social Good

The marketing research completed by students who are in their senior year of study at Molloy College proved yet again to be a rewarding experience for all parties involved. Student success came about while working harmoniously as a team to complete a fourteen-week research project that helped develop their professional as well as personal skills throughout the capstone experience. The students worked with a ‘live’ non-profit located on Long Island and their efforts proved to serve society well while moving their mission forward. This senior project promotes civic engagement within our local community while continuing to be beneficial toward their skills and disposition when entering into the business world. The students were charged with putting together turnkey recommendations that would assist the non-profit toward building upon their local relationships to fulfill its mission. This would subsequently lead to a better understanding of the great work that their assigned non-profit partakes in while embracing their efforts via social responsibility

Analysis of the performance measurement models according to the requirements of the procurement business process

© 2019 University of Novi Sad. The customer needs shape business activities continuously so the need for improving effectiveness stands as mandatory for overall business success. This paper analyses existing models for measuring the business processes performance from the aspect of their applicability to the procurement process. The paper first explains the concepts of enterprise performance, business process performance, and key performance indicators. Subsequently, a literature review of the identification problem of procurement process performance and key performance indicators is given. The models discussed and explained in this paper are Balanced Scorecard, SCOR model, performance measurement matrix, ABC model, and DOE/NV model. The model comparison was based on several relevant criteria

Fulfilling external stakeholders’ demands—enhancement workplace safety using fuzzy mcdm

Sustainable development and project stakeholder management indicate a business practice where an organization strives to fulfil the demands of the important stakeholders for the pro-ject’s success. If one company relies on subassembly parts from its supplier, then it might be con-sidered that it has high interest for enhancing the business continuity of the supplier. This issue has become more complex during 2020 due to turbulent business conditions where the problem of the safety and health of workers during daily work has become one of main reasons for business vul-nerability. Besides the above-mentioned, project stakeholders may have different demands. The implementation of the management actions that lead to the fulfilment of stakeholder demands (SDs), such as addressing ongoing issues, are almost always limited by the available budget. The contribution of this research is providing the input for determining the actions which should address the most important SDs. Those activities may be seen as part of the strategy for external stakeholder management and successful long-term relationship. The determination of the priorities of SDs is based on a fuzzy multicriteria optimization model with type-2 fuzzy sets

Advanced risk assessment in reverse supply chain processes: A case study in Republic of Serbia

© 2019 CPE, University of Maribor. All rights reserved. Management of a reverse supply chain (RSC) often takes place in an uncertain environment, so it is supposed to be analyzed through the proactive approach for avoidance/elimination of risks. Management initiatives based on the assessed risk level and priority of potential failure mode (PFM) should lead to the increase of business effectiveness, the competitive advantage and sustainability of the RSC. Therefore, the focus of this research is set to proposing the reliable method that would be user-friendly and suitable for the determination of risk level and priority of PFMs in RSC. Uncertainties related to the severities of Potential Effect(s) of Failure (PEF) and their frequencies', as well as detection of PFMs are described by pre-defined linguistic expressions and modelled by the interval type-2 trapezoidal fuzzy numbers (IT2TrFNs). The assessment of the relative importance of risk factors is set as a fuzzy group decision-making. The weights vector is calculated based on the procedure of fuzzy number comparison. The value of each risk factor at the level of each PFM is assessed through the predefined linguistic expressions modelled by IT2TrFNs. The rank is obtained by modified Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) method. The proposed model is tested on a real-life data from RSC that operates in Serbia. In the domain of practical implications, it may be noticed that the application of the proposed model could decrease the influence of potential causes of failures modes on the overall RSC business activities especially in the terms of strategic management and human resource practices. The novelty of the proposed model may be underlined as it is used for the analysis of different RSC activities and many interconnected issues may be solved by the proposed management measures after conducted analysis

A New Model for Timing Jitter Caused by Device Noise in Current-Mode Logic Frequency Dividers

Abstract. A new method for predicting timing jitter caused by device noise in current-mode logic (CML) frequency dividers is presented. Device noise transformation into jitter is modeled as a linear time-varying (LTV) process, as opposed to a previously published method, which models jitter generation as a linear time-invariant (LTI) process. Predictions obtained using the LTV method match jitter values obtained through exhaustive simulation with an error of up to 7.7 %, whereas errors of the jitter predicted by the LTI method exceed 57 %.

Challenges in Evaluating Quality of the Serbian Traditional Dairy Product Kajmak

Kajmak, a traditional Serbian dairy product, is a top, crust layer of milk containing a high amount of aggregated milk fat and proteins, formed during long cooling of boiled milk. Due to variations in production technologies, environmental conditions, and the composition of raw milk which varies from region to region, the quality of kajmak produced traditionally in households is very inconsistent. Attempts to produce kajmak in the industry environment (dairy plants) turned out to be highly challenging in terms of achieving a uniform quality and safety of the product. In order to have a deeper insight into the quality of kajmak produced by the traditional manufacture and the industry, the main objective of the study was to investigate sensorial, physicochemical, and textural properties of kajmak produced in households and dairy plants and distributed through open markets and retail stores, respectively. A total of 36 samples of kajmak were analyzed for thirteen quality characteristics. The results obtained showed a high variability in kajmak quality. The study applied a mathematical calculation of a single total quality index (TQI) that makes all quality attributes comparable. Based on the obtained results, it was determined that kajmak produced in households had a better TQI, which leads to the conclusion that in terms of kajmak quality, the traditional production method is still superior to the industrial one. The correlation between the examined quality characteristics was investigated using Pearson’s bivariate correlation analysis and principal component analysis (PCA). By applying PCA, four principal components highlighting the most important quality characteristics were extracted. The results of the study suggest that further research on the quality of this valuable dairy product, as well as government support and investment in the small scale dairy sector, could be beneficial