Nitrogenous substances in potato (Solanum tuberosum L.) tubers produced under organic and conventional crop management

The contribution presents data on crude protein and protein, free amino acid and nitrate contents in potato tubers produced under different crop management – conventional and organic. Field trials were carried out with five potato cultivars on two sites of different altitude in 2005. Mean content of crude protein was significantly higher in tubers from organic crop management than in tubers from conventional system (10.92 and 9.76 % in dry matter, respectively). Similar result was observed in protein content (5.44 and 5.09 % in dry matter, respectively). Cultivar was the factor having the highest direct effect on crude protein as well as protein contents. Tubers from conventional crop management showed an increased tendency to accumulate nitrates

Driver's attention during monotonous driving and visual stimulation (ERP experiment)

Hlavním přínosem této práce je zjistit, zda je možné předpovídat pozornost řidiče pomocí měření jeho/její mozkové činnosti. Během monotóního řízení má pozornost tendenci se snižovat. Výrazný pokles pozornosti zůsobený únavou může mít fatanální následky pro řidiče nebo ostatní účastníky silničního provozu. Jednou z metod měření mozkové aktivity je tzv. elektroencefalografie (EEG). Spolu s EEG signálemje možné pozorovat specifické nervové odervy spojené s kognitivní stimulací subjektu (řidiče). Tyto odezvy jsou nazývány evokované potenciály (ERP). Existuje hypotéza, která tvrdí, že únava způsobuje prodloužení doby výskytu dané ERP komponenty. Tento nárůst je spojen s úpadkem pozornosti. Cílem práce je navrhnout a provést experiment, který by hypotézu potvrdil. Dalším úkolem je vyvinout aplikaci pro detekci artefaktů v naměřeném signálu.Katedra informatiky a výpočetní technikyObhájenoThe major contribution of this thesis is to discover if it is possible to predict the driver?s attention by measurement of his/her brain activity. During monotonous driving attention tends to decrease. The drop of attention due to fatigue might have serious consequences for the driver and for other traffic participants as well. One method to measure human brain activity is called the electroencephalography (EEG). Together with the EEG signal it is possible to observe specific neuronal responses connected with cognitive stimulation of the subject. These responses are known as event-related potentials (ERP). There is a hypothesis claiming that fatigue causes the shift in latency of the defined ERP component. An increase of this latency is associated with a fade of attention. The goal is to design and perform the experiment which verifies the hypothesis. Another goal of the thesis is to design and develop an application for artifact detection

Organic versus conventional potatoes – is there basis for consumers preference?

The aim of this study was to investigate the influence of growing conditions on the quality of potatoes from organic farming systems as compared to that from conventional farming. In our previous study conducted in the years 1996 – 1999 we recognised some differences between the potatoes (Solanum tuberosum) from organic and conventional farming. To demonstrate the general validity of observed trends, follow up study was established in Czech Republic in the years 2002-2005. The ultimate goal of the project was to collate data for the assessment of a potential influence of foods from organic production system on consumers´ health by studying differences between potatoes grown in both systems (for this purpose the levels of potentially toxic compounds as well as nutritionally valuable components with regard to variety, geo-graphical location and inter-annual variation were determined)

Visual odometry from omnidirectional camera

V této práci řešíme problém odhadu pohybu robota výhradně z obrázků pořízených ze všesměrové kamery, která je namontována na robotu (vizuální odometrie). V porovnání s hardware běžně používaným pro visuální odometrii, náš robot je specifický tím, že se pohybuje pomocí pásů a obrázky pořizuje pomoví všesměrové kamery s vysokým rozlišením a nízkou frekvencí snímkování (1 to 3 Hz). V naší práci se zaměřujeme na vysokou přesnost odhadů pohybu ve scénách, kde jsou objekty daleko od kamery. Toto je umožněno použitím všesměrové kamery. U tohoto typu kamer je známo že stabilizují odhad pohybu mezi pozicemi kamer, který je špatně podmíněn u kamer s malým zorným polem. Pro odhad pohybu kamery používáme metodu založenou na detekci rohů. K vůli možnosti velké vzájemné rotace kamer mezi snímky jsme nuceni použít metodu párování rohů namísto trackingu.We present a system that estimates the motion of a robot relying solely on images from onboard omnidirectional camera (visual odometry). Compared to other visual odometry hardware, ours is unusual in utilizing high resolution, low frame-rate (1 to 3 Hz) omnidirectional camera mounted on a robot that is propelled using continuous tracks. We focus on high precision estimates in scenes, where objects are far away from the camera. This is achieved by utilizing omnidirectional camera that is able to stabilize the motion estimates between camera frames that are known to be ill-conditioned for narrow field of view cameras. We employ feature based-approach for estimation camera motion. Given our hardware, possibly high ammounts of camera rotation between frames can occur. Thus we use techniques of feature matching rather than feature tracking.Department of Theoretical Computer Science and Mathematical LogicKatedra teoretické informatiky a matematické logikyFaculty of Mathematics and PhysicsMatematicko-fyzikální fakult

Information System Design

Tato bakalářská práce se zaměřuje na návrh optimalizace administrace v systému IDM (Identity Management). Návrh je založen na analýze současného stavu systému ve Fakultní nemocnici v Bohunicích. Uvedené zlepšení bude směrovat k urychlení pracovních úkonů na denní bázi. Využití administrativních práv uživatelů a správné nastavení přístupů a práv v jednotlivých systémech nemocnice povede k zvýšení bezpečnosti, rychlosti a efektivity systému.This bachelor thesis focuses on designing an administration optimization in the IDM (Identity Management) system. The basis of the proposal is created by an analysis of the current state of the system at the University Hospital in Bohunice. The proposed improvement is bound to speed up the daily workload. The utilization of users' administrative rights and the correct access and rights setting in individual hospital systems will increase the security, speed and efficiency of the system.

VLIV AGROEKOLOGICKÝCH PODMÍNEK NA OBSAH HRUBÉHO PROTEINU V HLÍZÁCH PRŮMYSLOVÝCH ODRŮD BRAMBOR

Crude protein content in dry matter of processing potato tubers cultivated in the Czech Republic in 2004-2005 on three sites with different altitudes and two variants of N fertilization ranged from 5.86 to 11.16%. Differences in crude protein content between doses of 100 kg N ha-1 and 200 kg N ha-1 were significant (P<0.05), resulted at average in 7.5 and 8.4% of dry matter of potato tubers, respectively. The variability of crude protein content was above all affected by cultivar (34.3%). The yield of crude protein per area unit ranged from 426 to 1279 kg ha-1 and was affected mainly by the year (24.1%) and by interaction of the year and the site (41.5%). The increasing altitude caused at average increasing of tuber yield and consequently increasing of crude protein yield per area unit. However, crude protein content showed opposite trend and the lowest concentration (7.5%) was achieved on the site with the highest altitude.Studie se zabývá obsahem hrubého proteinu v sušině hlíz průmyslových odrůd brambor, které byly napěstovány v letech 2004 až 2005 v České republice na třech stanovištích s odlišnou nadmořskou výškou v kombinaci s využitím dvou dávek dusíkatého hnojení. Obsah hrubého proteinu v sušině hlíz průmyslových brambor se pohyboval v rozmezí 5.86 až 11.16%. Navýšení dávky dusíku ze 100 kg N ha-1 na 200 kg N ha-1 průkazně (P<0.05) zvýšilo obsah hrubého proteinu v sušině hlíz brambor. V průběhu studie byla zjištěna významná odrůdová variabilita obsahu hrubého proteinu. Výnos hrubého proteinu z jednotky plochy se pohyboval v rozmezí 426 až 1279 kg ha-1 a byl ovlivněn především ročníkem (24.1%) a kombinací ročníku a stanoviště (41.5%). Na stanovištích s vyšší nadmořskou výškou byl zaznamenán nárůst produkce hrubého proteinu na jednotku plochy, ovšem obsah hrubého proteinu v sušině hlíz byl na stanovišti s nejvyšší nadmořskou výškou nejnižší (7.5%

The quality of ketchups from the Czech Republic's market in terms of their physico-chemical properties

Ketchup is a tomato-based condiment with a tang contributed by vinegar, sugar, salt and spices.&nbsp;Physical and chemical quality requirements for ketchup are regulated in the Czech Republic by Decree No. 157/2003 as amended. The main monitored parameters determining the quality of ketchups are total tomato content, total soluble solids, total organic acids and total salt content. In this work the following parameters were monitored in a total of eight ketchups from the commercial markets in the Czech Republic: pH, total solids, total soluble solids, citric acid content, acetic acid content, lycopene content, fructose, glucose and sucrose content and content of Ca, K, Mg and Na. In addition to chemical analyses, rheological measurements were performed and dynamic viscosity and yield stress were determined. The results obtained were statistically processed and the hypothesis i) whether the sales price of ketchups is related to the quality of ketchups expressed in chemical composition and ii) whether the chemical composition affects the rheological properties of ketchups has been verified. The Pearson correlation matrix showed very good correlation between the total solids and tomato content in the ketchup (R = 0.8464) as well as between the total soluble solids and tomato content in the ketchup (R = 0.8583). Another significant correlation was found between total soluble solids and total saccharides content in ketchup (R = 0.7309) as well as between potassium content and and tomato content in the ketchup (R = 0.8864). The chemical composition of ketchups did not significantly affect the dynamic viscosity of ketchups, however strong correlation between tomato content in ketchup and between yield stresses was found (R = 0.8436). No correlation was found between the ketchup price and chemical composition of ketchup, however cheaper ketchups contained more salt.</p