IMPLICATION OF CYCLE-TO-CYCLE VARIABILITY IN SI ENGINES

The paper deals with utilization of an adaptive combustion model in order to simulate cycle‐to‐cycle combustion variability of SI engines. The used empirical adaptive combustion model consists of two parts: the first part for ignition delay prediction and the second part for in‐cylinder combustion process description. There is proved mutual independence of these two phases and shown their characteristics in terms of cycle‐to‐cycle variability. The practical utilization of the cycle‐to‐cycle variability simulation is demonstrated by computational analysis of various variability levels at different engine operational points in order to assess its impact on engine fuel consumption. The calculation results are generalized for SI gasoline engines independent of both engine load and combustion rate as well

Data management and archivation of electronic documents in SAP R/3

katedra: KIN; přílohy: 1 CD-R; rozsah: 77 stranPráce vychází z dostupných teoretických znalostí a z praktických zkušeností. Její hlavní náplní je porovnat, vyzdvihnout výhody a poukázat na nevýhody různých způsobů archivace v systému SAP R/3. Druhá část se zaměřuje na vytvoření návrhu systému správy uložených dat. Na základě srovnání se pokouší dojít k závěrečnému zhodnocení, který ze systémů by mohl být nejideálnějším, případně nejideálnější systém dle určitých kritérií - jako například: pořizovací cena, náklady na údržbu, rozsah funkčnosti, komfortnost uživatelského rozhraní a tak podobně. Nedílnou součástí je i přehled současných HW možností a výběr HW pro společnost.Thesis derives from available teoretical information and experiences. The main point is to compare different ways to archiving in IS SAP R/3. It includes advantages and disadvantages of these ways. Second part targets the creating concept for data management. It would to reach a view, which of the archivation system is the best or eventually best in compliance with some criteria like: purchase price, service costs, functionality, accommodation of user interface etc. HW possibilities and the selection of HW for company are integral parts of this thesis

Solving Cubic Equations

katedra: KFY; přílohy: CD; rozsah: 119s.This diploma thesis is dealing with various methods of solvingcubic equations. These methods are presented not only froma contemporary point of view but also from a historical point of view.There is an important part dealing with methodology suitable forsolving cubic equations on secondary schools.In this diploma thesis there are explained some basic termsdealing with this area of interest. This work is including an overview ina light of history. Into these methods, which are mentioned there,belongs an algebraic and a goniometrical solution, a solution usingnumerical methods and a graphical solution.The last part is containing methodology, when and in which wayis suitable this curriculum integrate into secondary school plans.Suitable methods for secondary schools are chosen to fit the student?sabilities. The main accent is put on student?s active work during lessonsby way of partial tasks. The realisation is described by using concretelesson plans.Diplomová práce se zabývá různými metodami řešení kubickýchrovnic. Na tyto metody je zde nahlíženo jak z pohledu současného, taki historického. Součástí práce je rovněž metodika vhodná pro řešeníkubických rovnic na středních školách.V práci jsou nejprve vyloženy základní pojmy vztahující sek dané problematice. Dále je podán historický přehled řešení kubickýchrovnic. Mezi metody řešení, o kterých práce pojednává, patří řešeníalgebraické, goniometrické, řešení pomocí numerických metod a řešenígrafické.Poslední část je věnována metodice, kdy a jakým způsobem jevhodné toto učivo zařadit do výuky na střední škole. Výběr metod jepřizpůsoben schopnostem studentů. Důraz je kladen na jejich aktivnízapojení do výuky prostřednictvím řešení dílčích úkolů. Samotnávýuka je popsána pomocí příprav na jednotlivé hodiny

Adaptivní model hoření homogenní směsi ve válci zážehového spalovacího motoru

Tato habilitační práce je zaměřena na experimentální výzkum vozidlového zážehového motoru spalujícího homogenní palivovou směs. Konkrétně se jedná o přímé měření obsahu zbytkových spalin ve válci motoru s využitím analýzy odebíraného vzorku náplně válce v průběhu kompresního zdvihu. Změřené hodnoty jsou pak porovnány s alternativními nepřímými výpočtovými postupy. Na vyšetřovaném motoru byla provedena termodynamická analýza indikovaného tlaku v širokém rozsahu provozních režimů motoru. Ze zjištěných údajů byl s využitím regresní analýzy sestaven empirický adaptivní model pro popis průtahu zážehu a průběhu vyhořívání palivové směsi ve válci motoru. Adaptabilita navrženého modelu hoření spočívá v tom, že model dokáže adekvátně reagovat na změny provozního režimu motoru, aniž by musely být upravovány parametry výpočtu.This habilitation thesis is aimed at experimental research of the vehicle spark- ignition engine with homogenous fuel-air mixture. It includes direct measurement of residual gas content in the engine cylinder by means of gas sampling during the compression stroke with its further analysis. The measured values are being compared with alternative indirect techniques. The investigated engine had undergone thermodynamic analysis of cylinder pressure data within a wide range of operational engine conditions. The empirical adaptive model for ignition delay and in-cylinder combustion process has been built based on the calculated data and by using regression analysis. The adaptability of the proposed combustion model consists in its appropriate response to the changes of operational engine conditions without need for the model readjustment

Factors Affecting Length of Inpatient Forensic Stay: Retrospective Study From Czechia

Objectives: The length of forensic stay (LoS) is a subject to country-specific legal and service systems. Therefore, the identification of common factors targetable by treatment is at the forefront of forensic psychiatric research. In this study, we present the first reports of forensic characteristics of patients from the Czechia. Methods: We conducted a retrospective analysis of data from 260 inpatients discharged from the Bohnice Hospital (Prague) and obtained a set of sociodemographic and clinical variables as well as the Health of the Nation Outcome Scale (HoNOS) and HoNOS-secure scores. Results: The following variables were identified as significantly associated with a longer LoS: older age, length of previous psychiatric hospitalization, olanzapine equivalent, clozapine treatment, psychosocial dysfunction, psychotic or paraphilic disorder diagnosis, and sexual offense. A shorter LoS was associated with being in a relationship, being employed before hospitalization, receiving personal support, and committing an index offense under the influence of substance. While the HoNOS score and HoNOS symptom subscale predicted a longer LoS, the HoNOS-secure subscale predicted a shorter stay. Conclusion: In the European context, our hospital has a relatively low LoS. The results are consistent with findings linking psychotic disorders and paraphilia with a longer LoS in forensic treatment. Higher doses of antipsychotic medication or clozapine prescriptions were associated with a longer LoS. The results show a high level of unmet needs in this population, highlighting the importance of the availability of follow-up service

Cost-effectiveness of care for people with psychosis in the community and psychiatric hospitals in the Czech Republic: an economic analysis

Background The absence of economic evidence hinders current reforms of hospital-based mental health systems in central and eastern Europe. We aimed to assess the cost-effectiveness of discharge to community care for people with chronic psychoses compared with care in psychiatric hospitals in the Czech Republic. Methods We did a prospective study of people aged 18–64 years with chronic psychotic disorders in the Czech Republic who had been discharged into community services or were receiving inpatient psychiatric care for at least 3 months at baseline. We measured health-related quality of life with the EuroQol five-dimension five-level questionnaire. Adjusting for baseline differences between the two groups, we assessed differences in societal costs in 2016 and quality-adjusted life-years (QALYs) during a 12-month follow-up, which we then used to estimate the incremental cost-effectiveness ratio (ICER). We did multiple sensitivity analyses to assess the robustness of our results. Findings In our baseline case scenario, we included 115 patients who were either community service users (n=35) or inpatients (n=80) at baseline. The two groups were similar in terms of baseline characteristics. The annual QALY was 0·77 in patients receiving community care at baseline compared with 0·80 in patients in hospital at baseline (difference 0·03, 95% CI −0·04 to 0·10), but the costs of discharge to the community were €8503 compared with €16 425 for no discharge (difference €7922, 95% CI 4497–11 346), such that the ICER reached more than €250 000 per QALY. This ICER is substantially higher than levels that are conventionally considered to be cost-effective and the estimated probability that discharge to the community was cost-effective was very high (≥97%). None of the sensitivity analyses changed these results qualitatively. Interpretation This study provides economic evidence for deinstitutionalisation by showing that discharge to community care is cost-effective compared with care in psychiatric hospitals in the Czech Republic. These findings add to the human rights and clinical-based arguments for mental health-care reforms in central and eastern Europe