Border bases for lattice ideals

The main ingredient to construct an O-border basis of an ideal I $\subseteq$ K[x1,. .., xn] is the order ideal O, which is a basis of the K-vector space K[x1,. .., xn]/I. In this paper we give a procedure to find all the possible order ideals associated with a lattice ideal IM (where M is a lattice of Z n). The construction can be applied to ideals of any dimension (not only zero-dimensional) and shows that the possible order ideals are always in a finite number. For lattice ideals of positive dimension we also show that, although a border basis is infinite, it can be defined in finite terms. Furthermore we give an example which proves that not all border bases of a lattice ideal come from Gr\"obner bases. Finally, we give a complete and explicit description of all the border bases for ideals IM in case M is a 2-dimensional lattice contained in Z 2 .Comment: 25 pages, 3 figures. Comments welcome!, MEGA'2015 (Special Issue), Jun 2015, Trento, Ital

Geosynthetic-encased stone columns: analytical calculation model

This paper presents a newly developed design method for non-encased and encased stone columns. The developed analytical closed-form solution is based on previous solutions, initially developed for non-encased columns and for non-dilating rigid-plastic column material. In the present method, the initial stresses in the soil/column are taken into account, with the column considered as an elasto-plastic material with constant dilatancy, the soil as an elastic material and the geosynthetic encasement as a linear-elastic material. To check the validity of the assumptions and the ability of the method to give reasonable predictions of settlements, stresses and encasement forces, comparative elasto-plastic finite element analyses have been performed. The agreement between the two methods is very good, which was the reason that the new method was used to generate a parametric study in order to investigate various parameters, such as soil/column parameters, replacement ratio, load level and geosynthetic encasement stiffness on the behaviour of the improved ground. The results of this study show the influence of key parameters and provide a basis for the rational predictions of settlement response for various encasement stiffnesses, column arrangements and load levels. The practical use of the method is illustrated through the design chart, which enables preliminary selection of column spacing and encasement stiffness to achieve the desired settlement reduction for the selected set of the soil/column parameters. (C) 2010 Elsevier Ltd. All rights reserved

A study of road safety crossing G1 - 4, section 1258 Otiški vrh - Sl. Gradec/G1 - 4, section 1445 Sl. Gradec / LZ 378021 Glavni trg - Murko

In this thesis I analyze the traffic load and throughput of 4-way junction with traffic lights. On this basis, I propose two possible solutions to improve existing arrangement. As a first option I present the reconstruction of the intersection with modified geometry and attached left turn lane on the import of the crossing, which is problematic. My second proposal for resolving the current situation, is to place a new roundabout. In both cases, I also change the management of non-motorized road users, which under the new regulation takes place across the river over a wooden footbridge. Eligibility and suitability of each variant I prove by calculation of the degree of saturation and level of services for each way in a classic crossroads with traffic lights, and the calculation of the traffic throughput for every importing lane

Nekaj misli o boljšem izobraževanju studentov stomatologije

The article mentions ways of inducing students of dentistry to tako an active part in the teaching process. In the direct activation process the teacher establishes contacts with his students during the practical part of their training and thus gets to know them individually. In the indirect activation process the subject must be presented to the students in the best possible and most interesting way. In both cases each subject that is taught must be a sequel to the previous one, so to say a superstructure although it is not necessary to lecture on every chapter foressen in the plan. However, these chapters which have been chosen in agreement with the students must be treated systematically. Lectures in the form of a seminar particularly tend to stimulate students to take a more active part in the teaching process, especially if the students are asked to lecture themselves and if the lecturer is selected shortly before the lecture is to start. After the lecture a discussion usually develops. The discussion is started by the students themselves while the teacher acts as adviser, guiding and complementing the discussion. The negative side of the seminar method of teaching is that it requires more time than the classical method of teaching. The author thinks that such a form of tuition will become possible at a later stage when the study of stomatology will extend to a period of approximately 6 years. The audio-visual method of teaching has also been mentioned as one of the methods to activate the students more without taking up too much of their time. The teacher has then more spare time for scientific and research work. This method is, however, expensive. Although we cannot altogether introduce the most modern ways and methods of teaching, great improvements might be possible if we adopt some of these educational measures.Das Aktivieren der Studenten im Laufe der Ausbildung kann auf direkte oder indirekte Weise erfolgen. Die direkte Aktivierung besteht im unmittelbaren Kontakt des Hochschullehrers mit den Studenten während der Übungen. Bei der mittelbaren Aktivierung muss der Gegenstand für den Studenten besonders anziehend dargestellt werden. Besonders anregend wirken Seminare, falls sie von den Studenten selbst ausgeübt werden und der Vortragende erst vor Beginn der Vorlesung gewählt wird. Nach beendeter Vorlesung entwickelt sich eine Diskussion, welche von den Studenten begonnen wird, der Hochschullehrer soll sie nur leiten und ergänzen. Die Schattenseite des Seminar-Unterrichts ist der grössere Zeitverlust im Verhältniss zum klassischen Unterricht. Der Autor ist der Meinung, dass für diese Art von Ausbildung ein Studium von sechs Jahren notwendig ist. Es wird auch der audiovisuelle Typus des Unterrichts erwähnt, welcher zeitsparend ist, doch sind seine Kosten grösser. Die angeführten pädagogischen Massnahmen tragen viel zu einer besseren Ausbildung bei.U članku se govori o boljem aktiviranju studenata stomatologije u pedagoškom procesu. U direktnom aktiviranju nastavnik dolazi u kontakt sa studentima za vrijeme vježbi i tako individualno kontaktira s njima. U indirektnom aktiviranju predmet mora biti što interesantniji za studenta. U oba slučaja svaki predmet mora biti nadogradnja prethodnog, iako se sva poglavlja ne moraju predavati. Ona, koja se dogovorno sa studentima odaberu trebaju biti sistematska. Predavanja u seminarskom obliku posebno aktiviraju studente ako ih sami studenti izvode a predavač se odredi neposredno prije početka predavanja. Po završenom predavanju razvija se diskusija, koju započinju studenti a nastavnik je usmjeruje i nadopunjava. Nepovoljna strana seminarskog načina nastave je u tome što iziskuje mnogo više vremena od klasične nastave. Autor smatra da će takva nastava biti moguća kad će stomatološki studij trajati 6 godina. Spominje se i audiovizuelni način nastave koji studenta više aktivira a vremenski ga ne preopterećuje pa nastavnik ima više vremena za naučno istraživački rad. Taj je način nastave međutim skup. lako ne možemo u potpunosti uvesti najsavremeniji način nastave ipak ćemo mnogo poboljšati nastavu, pridržavajući se spomenutih pedagoških mjera

ADVANCED HYBRID SOLAR CELL DESIGN

Interdigitated back surface contact (IBC) and copper indium gallium diselenide (CIGS) solar cells have been explored by multiple former Naval Postgraduate School (NPS) students with mutual independence. This thesis marries IBC and CIGS into a single cell to explore its optical parameters before introducing a novel cell design to reduce recombination in the absorber by establishing a vertical electric field. Implementing the novel design established up to a 7.5kV/cm electric field in the absorber to promote the separation of charge carriers, resulting in significant increases in short circuit current and I-V curve knee extension to raise cell efficiency to 24.32% at 300 K. Comparing this cell to optimal designs of prior theses, our cell boasts a 79.45% reduction in cell thickness and relative efficiency increase of 5.74%. Modeling of this cell demonstrates its potential for use in low weight, high power equipment such as UAVs, satellites, and solar blankets used by warfighters.Lieutenant, United States NavyApproved for public release. Distribution is unlimited

An Analysis of Expenditure Patterns of Weating Apparel of University of North Dakota Students

This thesis analyzes the expenditures of University of North Da.kota. students on wearing apparel in Grand Forks. The period for which the study was conducted extended from November 1, 1969 to February 1, 1970. The data, used in this thesis were obtained from 100 personal interviews with students attending the University. A structured questionnaire was used to gather the information. Two sta.tistica.l techniques, the multiple linear correlation and the t-test, were used to analyze the data.. Eight factors were selected that would possibly influence the expenditure patterns of U.N.D. students on wearing apparel. The four factors that were continuous by nature were the respondent\u27s monthly income, the age of the respondent, the respondent\u27s parents\u27 yea.rly income if single or the respondent\u27s yearly income if married, and income spent on wearing apparel in cities other than Grand Forks. These four factors had no significance on the expenditure patterns of U.N.D. students on wearing apparel. The four factors that were discrete by nature were sex, marital status, place of residence, and campus fraternity affiliation. Female students did spend significantly more on wearing apparel | than did male students. Students that were members of a. campus fraternity did spend significantly more on wearing apparel than did students that were not members. There was no significant difference in the dollar expenditures on wearing apparel for students that were either married or single or for students that were either living on campus or off campus

Use of Automatic Target Recognition System for the Displacement Measurements in a Small Diameter Tunnel Ahead of the Face of the Motorway Tunnel During Excavation

During construction of the Sentvid tunnel a unique opportunity arose to measure the 3D displacements ahead of the motorway tunnel excavation face, since the exploratory tunnel was already constructed in the axis of the main tunnel. According to reviewed literature such measurements had not been performed yet and several problems regarding equipment and complete scheme of the experiment needed to be overcome. The paper gives a brief description of the Sentvid tunnel project, presents significant factors that affected the choice of the geodetic equipment and describes the scheme of the experiment. A special attention is focused on the problems relating to the operation of the instrument in demanding environmental conditions (water, dust)