EVALUATION OF DEPTH MODALITY IN CONVOLUTIONAL NEURAL NETWORK CLASSIFICATION OF RGB-D IMAGES

This paper investigates the value of depth modality in object classification in RGB-D images. We use a simple model based on a multi-layered convolutional neural network which we train on a dataset of segmented RGB-D images of household and office objects. We evaluate and quantify the benefit of additional depth modality and its effect on classification accuracy on this dataset. Also, we compare the benefit of depth channel against the addition of color to grayscale image. Our experimental results support a conclusion, that for these categories of objects the depth modality provides a significant benefit to classification, which also outweighs the benefit of color information. Similar supporting evidence found in recent research is shown in comparison along with the resulting quantified benefit of depth modality

Research Update: Focused ion beam direct writing of magnetic patterns with controlled structural and magnetic properties

Focused ion beam irradiation of metastable Fe78Ni22 thin films grown on Cu(100) substrates is used to create ferromagnetic, body-centered cubic patterns embedded into paramagnetic, face-centered-cubic surrounding. The structural and magnetic phase transformation can be controlled by varying parameters of the transforming gallium ion beam. The focused ion beam parameters such as the ion dose, number of scans, and scanning direction can be used not only to control a degree of transformation but also to change the otherwise four-fold in-plane magnetic anisotropy into the uniaxial anisotropy along a specific crystallographic direction. This change is associated with a preferred growth of specific crystallographic domains. The possibility to create magnetic patterns with continuous magnetization transitions and at the same time to create patterns with periodical changes in magnetic anisotropy makes this system an ideal candidate for rapid prototyping of a large variety of nanostructured samples. Namely, spin-wave waveguides and magnonic crystals can be easily combined into complex devices in a single fabrication ste

Obsah živín a profil mastných kyselín v rôznych druhoch olejnín

The aim of this study was to determine nutrients content of 4 oilseeds (sunflower, soybean, flaxseed and rapessed) and fatty acid profile of oils obtained from the seeds. Dry matter (DM), crude protein (CP), nitrogen free extract (NFE) and fat content of the seeds were determined by standard laboratory methods and procedures. Significant (P<0.05) differences in composition of all the analyzed seeds were found. Fatty acid profile analysis was performed using the Agilent 6890 A GC machine. The analyzed oils mainly composed of polyunsaturated fatty acids (PUFA), with the exception of rapeseed oil which primarily contained monounsaturated fatty acids (MUFA). Flaxseed oil has significantly (P<0.05) proven to be the richest in PUFA content (76.46%), but on the other hand it contained the least amount of MUFA (13.47%). The saturated fatty acid (SFA) content, except for soybean oil, was below 10%. The most optimal ratio between n-6 and n-3 unsaturated fatty acids (USFA) was found in rapeseed oil (2.22:1). From the fatty acid profile of analyzed oils significant (P<0.05) differences in the content of palmitic, stearic, oleic, linoleic, arachidic, eicosenoic, behenic and lignoceric acids were detected.Cieľom práce bolo analyzovať obsah živín rôznych semien olejnín (slnečnicových, sójových, ľanových a repkových) a profil mastných kyselín rastlinných olejov získaných z týchto semien. Analýza obsahu sledovaných živín v semenách olejnín (sušina, dusíkaté látky, bezdusíkaté látky výťažkové a tuk) bola vykonaná prostredníctvom štandardných laboratórnych metód a postupov. Zistili sa preukazné (P<0.05) rozdiely v zložení všetkých analyzovaných semien. Analýza profilu mastných kyselín bola vykonaná pomocou zariadenia Agilent 6890 A GC. Analyzované oleje pozostávali hlavne z polynenasýtených mastných kyselín (PUFA), s výnimkou repkového oleja, ktorý obsahoval najmä mononenasýtené mastné kyseliny (MUFA). Ľanový olej bol preukazne (P<0.05) najbohatší na obsah PUFA (76.46%), ale na druhej strane obsahoval najmenšie množstvo MUFA (13.47%). Obsah nasýtených mastných kyselín (SFA), s výnimkou sójového oleja, bol nižší ako 10%. Najoptimálnejší pomer medzi n-6 a n-3 nenasýtenými mastnými kyselinami (USFA) sa zistil v repkovom oleji (2.22:1). V profile mastných kyselín analyzovaných olejov sa zistili preukazné (P<0,05) rozdiely v obsahu kyseliny palmitovej, steárovej, olejovej, linolovej, arachidónovej, eikosaénovej, behénovej a lignocerovej

Nitrogen and sulphur fertilisation affecting soybean seed spermidine content

Soybean (Glycine max [L.] Merr.) is the major protein and oilseed crop worldwide. Soybean seeds are a rich source of spermidine and other polyamines, which have various positive health effects such as anti-ageing, antioxidant or anti-inflammatory properties. Beside its macro-nutritional composition, soybean contains various bioactive compounds adding health-protecting functional properties to soy-based foods. The present research is based on the hypothesis that soil application of nitrogen and sulphur might stimulate soybean seed polyamines in addition to agronomic traits. As effects of fertiliser application on spermidine were unknown before, a respective pot experiment was carried out, applying ammonium sulphate or urea at nitrogen levels of 0, 1 or 3 g per 5 kg soil in two soybean cultivars. The results indicated that cultivars differed significantly in seed yield, thousand seed weight (TSW) and oil content. For both tested cultivars, seed yield, TSW and contents of protein and spermidine were lowest in the unfertilised treatment. The spermidine content increased significantly after the application of each dose of ammonium sulphate (280 - 283 mg kg-1 DM) or the lower dose of urea (267 mg kg-1 DM) as compared to the unfertilised control (228 mg kg-1 DM). The contrast in spermidine levels between non-sulphur (256 mg kg-1 DM) and sulphur (282 mg kg-1) treatments was significant as well, whereas no significant effects were found for the spermine content. The results demonstrate that an application of appropriate doses of nitrogen and sulphur can increase the content of spermidine in soybean seeds apart from affecting other traits. © 2018, Polish Society Magnesium Research. All rights reserved.Internal Grant Agency (IGA) of the Faculty of Regional Development and International Studies of Mendel University in Brno [2016/017

Trust Building and Fake News on Social Media from the Perspective of University Students from Four Visegrad Countries

There is an important need in the literature to explore the effects of social media use on young people’s behaviour. The main purpose of this research is to explore which factors of users´ gratifications are associated with using social media by university students from four countries in Central Europe. Online communication on social media may be affected by a variety of factors that affect the development of mutual relationships. Thus, research is also focused on trust building on social media. The research team conducted qualitative research aimed on the deeper understanding of students’ opinions on “trust and social media” and their view on the phenomenon “fake news". Using focus groups in four countries showed that university students, who are frequent users of social media, are inclined to trust certain pages they like but generally, they do not trust social media. They use social media for maintaining relationships at first place and they believe in people who are connected to their network. It is obvious that students use social media to satisfy their needs, especially in the field of entertainment, partly also for obtaining information. The findings show that expected gratifications of students are built on their practical experience with medi

Biped robot with unconventional kinematics

The article deals with the design of a robot with an unconventional kinematic structure, which is able to vertically stabilize the position of the robot base for the placement of sensors and handling superstructures. The robot concept was designed to have as few actuators as possible. The robot's kinematics was solved for the purpose of simulating the robot's movement and implementation into the robot's control system.Web of Science20225824581

Knowledge sharing practices and issues in policing contexts: a systematic review of the literature.

The effective sharing of knowledge both within and between police organizations is arguably becoming increasingly vital for success and has driven research in a disparate range of fields. This paper therefore presents the results of an integrative systematic literature review of research into knowledge sharing within and between police organizations across Europe. The 39 papers analysed were drawn from English-language studies published between 2000 and 2013, complemented by additional searches for non-English language papers in nine European countries. Analyses showed that past research has focused on intra-organizational knowledge sharing, with a particular spotlight on criminal intelligence and technology. Barriers / enablers of knowledge sharing were grouped into knowledge management strategy/legislation, technology, culture and loss of knowledge themes. Research recommendations include exploring the role of leadership and examination of police knowledge sharing across regional, institutional and international boundaries. Practical recommendations include having procedural clarity in systems, policies for sharing knowledge and developing the relevant knowledge, skills and motivation of police personnel through appropriate training. Keyword : knowledge sharing, information, systematic literature review, polic