abstract in this research, the comparative advantage of cereals including: wheat, barley and corn in cities of kerman, bardsir and baft was investigated by using domestic resource cost (drc), social cost benefit (scb) and effective protection coefficient (epc) index during 2005-2006 and effect of exchange rate changes, price changes and products costs on comparative advantage, were investigated...

This thesis attempts to describe the necessary steps to program an application to take pictures, organize and process them in order to generate and visualize a three-dimensional colored point cloud. The steps to create the application are explained, using the argumentative logic to every decision and fulfill the stated objective in the best possible way, balancing the available technology and t...

We consider the problem of making efficient qualitytime-cost trade-offs in collaborative crowdsourcing systems in which different skills from multiple workers need to be combined to complete a task. We propose CrowdAsm an approach which helps collaborative crowdsourcing systems determine how to combine the expertise of available workers to maximize the expected quality of results while minimizi...

Elektronické testovanie znalostí a faktory vplyvu na výsledky Didactic test in electronic version presents fast and precise, modern and effective form of feedback from students to teacher. Electronic test, as a highly formalised instrument of evaluation of the students' preparation and knowledge, has its own unique place in the whole education process. The contribution suggests on practical app...

Peer-to-peer systems have emerged as a popular way to share huge volumes of data. The usability of these systems depends on effective techniques to find and retrieve data; however, current techniques used in existing P2P systems are often very inefficient. In this paper, we present three techniques for efficient search in P2P systems. We present the design of these techniques, and then evaluate...

One of the primary ways researchers have characterized engagement is by an increase in search actions. Another possibility is that instead of experiencing increased engagement, people who click and query frequently are actually frustrated; several studies have shown that frustration is also characterized by increases in clicking and querying behaviors. This research seeks to illuminate the diff...

Clustering is one of the most well known types of unsupervised learning. Evaluating the quality of results and determining the number of clusters in data is an important issue. Most current validity indices only cover a subset of important aspects of clusters. Moreover, these indices are relevant only for data sets containing at least two clusters. In this paper, a new bounded index for cluster...

This paper describes an on-going effort to combine Information Retrieval (IR) and Information Extraction (IE) technologies, to leverage the benefits provided by both approaches to add value for the end-user, as compared with IR or IE in isolation. The main aim of the combined system is to pool together information from multiple sources to improve the quality of results. On one hand, multiple me...

As a first attempt at participation in the TREC competition, we built a system which produced some preliminary results, but was unable to generate the quality of results that we expected. While we were able to submit four base-line runs, bugs were discovered in the final hours before the deadline making it impossible to submit results using our intended implementation. We have since found addit...

Peer-to-peer systems have emerged as a popular way to share huge volumes of data. The usability of these systems depends on effective techniques to find and retrieve data; however, current techniques used in existing P2P systems are often very inefficient. In this paper, we present three techniques for efficient search in P2P systems. We present the design of these techniques, and then evaluate...