117,859 research outputs found
Establishment a database structure to evaluation and amortization public infrastructure
No full textThe present master's thesis deals with the establishment of a data system to be used for the assessment and calculation of depreciation of public service infrastructure for drinking water supply. The aim of collecting the funds for the restoration of the infrastructure network is to maintain the standard of supply and ensure the functional capacity of the infrastructure. The draft system to be used for the assessment and calculation of depreciation of public service infrastructure was designed by integrating the data from the cadastre of public service infrastructure and the existing data from the register of fixed assets. As it has been found during the course of writing the present thesis that the two sets of data are not consistent and that the data from the register of fixed assets do not show the real value of infrastructure or that the calculation of depreciation based on such register does not ensure a sufficient amount for the replacement of decrepit fixed assets, it is proposed that the assessment of public utility infrastructure be based on the data from the cadastre of public service infrastructure, which are presumed to be the most detailed and precise aggregated data on public utility infrastructure. It is proposed in the thesis that the purchase value of new infrastructure be assessed based on the data from the cadastre and the reference pricelist. A realistic assessment of the value of drinking water supply infrastructure facilitates the collection of sufficient depreciation funds and realistic pricing of drinking water supply. This in turn facilitates compliance with the requirements of EU directives (Commission Directive 2006/111/EC on the transparency of financial relations between Member States and public undertakings as well as on financial transparency within certain undertakings, Directive 2000/60/EC of the European Parliament and of the Council establishing a framework for Community action in the field of water policy) and with the fundamental environmental principles, i.e. the polluterpays principle and the coverage of all costs principle
Establishment of a database structure for drinking water quality and public healt analysis
No full textOPTIMIZATION OF DECOMPOSITION AND REDUCTION PROCESSES IN CLOSED SYSTEM FOR DETERMINATION OF TITANIUM DIOXIDE MASS CONCENTRATION IN REAL SAMPLES
No full textNamen diplomskega dela je optimizacija procesov razkroja in redukcije vzorcev iz proizvodnje pigmentnega titanovega(IV) oksida v zaprtem sistemu. Sledila je potenciometrična določitev vsebnosti titanovega(III) oksida ter železovega(II) oksida v razkrojenih in reduciranih vzorcih. Kot sistem za razkroj in redukcijo smo uporabljali zaprt mikrovalovni razklop.
Glavni namen uporabe zaprtega sistema razkroja in redukcije je preprečitev stika s škodljivimi plini. Razkroje in redukcije v mikrovalovni pečici smo izvajali z realnimi vzorci iz proizvodnje. Določili smo pogoje razkroja in redukcije za različne vzorce tako, da so istočasno v mikrovalovni pečici različni vzorci. V mikrovalovni pečici je lahko istočasno do 16 vzorcev. Zaradi tega se skupen čas reakcije za posamezen vzorec podaljša, skrajša pa se skupen čas za razkoj in redukcijo večjega števila vzorcev.
Potenciometrična titracija s KMnO4 omogoča sočasno določitev Ti3+ in Fe2+ v istem vzorcu, kar nam omogoča razlika potencialov med Ti3+ in Fe2+ v raztopini.
Rezultati vsebnosti TiO2 (g/l) in Fe (g/l) v vzorcih, ki so bili razkrojeni in reducirani v mikrovalovni pečici ter dobljeni z avtomatsko potenciometrično titracijo s KMnO4, so ustrezni, točni in natančni. Z razvito metodologijo lahko uspešno nadomestimo metode, ki se trenutno uporabljajo v Kontroli proizvodnega procesa pigmentnega titanovega(IV) oksida.The purpose of the thesis is the optimisation of the processes of reduction and decomposition of samples from the production of pigmented titanium (IV) oxide in a closed system. Then followed the potentiometric determination of the volume of titanium (III) oxide and iron (II) oxide in reduces and disrupted samples. The closed system for decomposition and reduction in my case was the microwave oven.
The main purpose of the use of closed systems for degradation and reduction is to avoid harmful gases. The redactions and decomposition in the microwave oven were carried out with real production samples. We determined the conditions for the decomposition and reduction for different samples, so that different samples are simultaneously in the microwave oven. The microwave oven can take 16 samples at the same timetherefore the common reaction time for each samples increases and the common time for the degradation and reduction of a larger number of samples decreases.
The potentiometric titration with KMnO4 enables the determination of Ti3+ and Fe2+ in the same sample, which is enabled by the difference of potentials between Ti3+ and Fe2+ in the solution.
The results of the content of TiO2 (g/l) and Fe (g/l) samples, which were degraded and reduced in the microwave oven and gained with automatic potentiometric titration with KMnO4, are satisfying. With new methods we can replace the current methods used in the controll of the production process of titanium(IV) oxide
Bryan L. McDonald, Food Power: The Rise and Fall of the Postwar American Food System
No full textBryan L. McDonald, Food Power: The Rise and Fall of the Postwar American Food System Oxford University Press, 2017. Pp. 251. Hardcover. ISBN 978-0-19-060068-6 Urszula Niewiadomska-Flis Although Food Power: The Rise and Fall of the Postwar American Food System concerns roughly the years 1945-1975, the importance of McDonald’s book for today’s food security is tremendous. In his capacity as a Sherwin Early Career Professor in the Rock Ethics Institute and Associate Professor of History at Pen..
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Defective interaction between Pol2p and Dpb2p, subunits of DNA polymerase epsilon, contributes to a mutator phenotype in Saccharomyces cerevisiae.
No full textMost of the prokaryotic and eukaryotic replicative polymerases are multi-subunit complexes. There are several examples indicating that noncatalytic subunits of DNA polymerases may function as fidelity factors during replication process. In this work, we have further investigated the role of Dpb2p, a noncatalytic subunit of DNA polymerase epsilon holoenzyme from Saccharomyces cerevisiae in controlling the level of spontaneous mutagenesis. The data presented indicate that impaired interaction between catalytic Pol2p subunit and Dpb2p is responsible for the observed mutator phenotype in S. cerevisiae strains carrying different mutated alleles of the DPB2 gene. We observed a significant correlation between the decreased level of interaction between different mutated forms of Dpb2p towards a wild-type form of Pol2p and the strength of mutator phenotype that they confer. We propose that structural integrity of the Pol epsilon holoenzyme is essential for genetic stability in S. cerevisiae cells
Letter from unknown writer to Jesse L. Boyce
No full textLetter to Jesse L. Boyce from unknown author (possibly Jack) about the investigation into the powder magazine located in the Grand Canyon. Some personal news is included in the letter such as the writer's marriage to the daughter of C.A. Taylor, former Supervisor of Cochise County
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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