In this research, the protonation constant value of tannic acid was determined at 25 °C and different ionic strengths (0.1 to 0.7 mol/dm3 NaCl) using potentiometric titration technique. The dependence of protonation constant on ionic strength was modeled and discussed by a Debye-Hückel type equation. Then, based on the obtained data from experiments, the minimizing Sum o...

This book is meant to be read and used by professors and economists. It assumes familiarity with economic theory and data analysis, so it will not make sense to a student or beginner. It is a manual for utilizing teaching materials that are available on the Web at http://www.depauw.edu/learn/ macroexcel. It is assumed that the professor has a favorite textbook or readings that neither this book...

Paternity analysis using microsatellite information is a well-studied subject. These markers are ideal for parentage studies and fingerprinting, due to their high-discrimination power. This type of data is used to assign paternity, to compute the average selfing and outcrossing rates and to estimate the biparental inbreeding. There are several public domain programs that compute all this inform...

Soil classifiers have taken their lead from biologists but have not produced an internationally accepted system even though the WRB is supported by the IUSS. More recently Mazaheri et al. (1995a, 1995b) have tried to introduce Fuzzy logic into soil classification. They achieved a small amount of success when their technique was applied to selected soils in Australia but failed when applied to o...

Excel 2013 (version 15) includes an add-in 'Inquire' 1 for auditing spreadsheets. We describe the evolution of such tools in the third-party marketplace and assess the usefulness of Microsoft's own add-in in this context. We compare in detail the features of Inquire with similar products and make suggestions for how it could be enhanced. We offer a free helper add-in that in our opinion correct...

We analyze the performance of a genetic algorithm (GA) we call Culling, and a variety of other algorithms, on a problem we refer to as the Additive Search Problem (ASP). We show that the problem of learning the Ising perceptron is reducible to a noisy version of ASP. Noisy ASP is the first problem we are aware of where a genetic-type algorithm bests all known competitors. We generalize ASP to k...

Iran’s vast common natural gas resources and the necessity to extract and export it as Liquefied Natural Gas (LNG) to distances more than 3000Km opens a lucrative field for researchers to optimize LNG cycles. In this article heat integration in cryogenic cycles by determining interacycle partition temperature and optimizing refrigeration features like Subcooler, Presaturator, aftercooler, reboi...

zinc is the first modelling language which supports solver and technique independence. this means that a high level conceptual model can be automatically mapped into an appropriate low level design model for a specific solver or technique. to date, zinc uses three different techniques to solve a model: constraint programming (cp), local search (ls), and mixed integer programming (mip). in this ...

This paper presents a linear fractional programming problem (LFPP) with rough interval coefficients (RICs) in the objective function. It shows that LFPP RICs function can be converted into (LPP) by using variable transformations. To solve this problem, we will make two LPP (ICs). Next, those four LPPs constructed under these assumptions; solved classical simplex method and used MS Excel Solver....

In this paper, we present Tablexcel, a tabletop interface to Microsoft Excel. Single-user, desktop-based computer applications are pervasive in our daily lives and work. An application like Microsoft Excel, a widely deployed spreadsheet application, is used by a large number of businesses and users. Often, several users will collaborate on the creation of a spreadsheet, for example exchanging E...