. Human-Robot Interaction (HRI) research in public spaces often encounters delays and restrictions due to the need for sophisticated technology, regulatory approvals, and public or community support. To remedy these concerns, we suggest HRI can apply the core philosophy of Tactical Urbanism, a concept from urban planning, to catalyze HRI in public spaces, gather community feedback and information on the feasibility of future implementations of robots in the public, and create social impact and forge connections with the community while spreading awareness about robots as a public resource. As a case study, we share tactics used, and strategies followed in conducting a pop-up style study of ’A robotic mailbox to raise awareness about homelessness.’ We discuss benefits of the approach that could enable the social studies of HRI not only to match but to precede, the fast-paced technological advancement and deployment of robots in public spaces.

Nanocomposites (HAp/iron oxide), made of hydroxyapatite (HAp) and ferrimagnetic iron oxide, were synthesized by high-energy ball milling a mixture consisting of iron oxide nanoparticles and the starting materials used for the HAp synthesis: calcium hydrogen phosphate anhydrous (CaHPO4), and calcium hydroxide (Ca(OH)2). Two HAp/iron oxide samples with the magnetic phase content of 12 and 30 wt.% were prepared and their microstructure, morphology and magnetic properties were analysed by X-ray diffraction and transmission electron microscopy. Furthermore, the measurement of particle size distribution was performed by laser scattering, and temperature/field dependence on magnetization was determined. X-ray diffraction data confirmed the formation of two-phased samples (HAp and spinel iron oxide) without the presence of any other parasite phase. The shape of particles was nearly spherical in both samples, ranging from only a few to several tens of nanometres in diameter. These particles formed agglomerates with the most common value of the number-based particle size distribution of 380 and 310 nm for the sample with 12 and 30wt.% of iron oxide, respectively. Magnetization data showed that both HAp/iron oxide composites had superparamagnetic behaviour at room temperature.

This paper describes the analysis of steel reel shaft as drive shaft in a process of umbilical spooling of wire rope. There is a need to investigate shaft behaviour in the conditions of increasing workload. The aim is to investigate avoiding possible redesign or enabling redesign with minimal costs. Stress analysis has been carried out by using finite element analysis (FEA) and results are compared with the analytically calculated values. Finite element analysis has been carried out using maximum stress criteria and the area of potential failure is found. The main objective of this paper is to find balance in results between "design by rule" and "design by analysis". Design by rule provides rules on how to design a steel reel shaft using analytical equations and other strict rules from design elements. Design by analysis provides rules on using numerical analysis, typically finite element analysis to design a steel reel shaft. The steel reel shaft has been geometrically modelled using SolidWorks. To check all stresses, linear static analysis is done using DSS Simulation and Ansys.

O plakatu kao sredstvu komunikacije Vrijeme u kojem živimo potpuno je usaglaseno sa novim medijima vizuelnih komunikacija u koje se nedvosmisleno ubraja i plakat, sa svojom apsolutno prijemcivom i likovno pretpostavljenom formom, koja prati, osluskuje, provocira, uzbuđuje, obavjestava i uvodi u kompleksan svijet likovnosti i dizajna. Brojni teoreticari, istoricari i umjetnici raznih profila su se bavili njegovom pojavom i analizom, te predlaganjem raznih mogucnosti definisanja samog pojma plakata i plakatske umjetnosti, pa najcesce nailazimo na informacije o plakatu kao umoženoj obavijesti koja se postavlja na javnim mjestima (moguce od rijeci plak -mrljica ili krpica)? U engleskom jeziku se koristi termin poster (prihvaceno i u nasem jeziku kao doslovni prevod), ili posted up (objavljeno, u smislu postavljanja na javno mjesto). U francuskom jeziku se koristi the World Biennial of Student Poster -A Case Study Abstract: The paper World Biennial of Student Poster -A Case Study aims to show the complex structure of the poster as an art form in a historico-analytical and content-wise manner. Viewing the poster in the light of the progressive technological and innovative possibilities of modern information technologies, constantly requires challenging of the scopes and justification of the existence of a "classic" poster. Its role in contemporary society has been analyzed through various forms of manifestation in the spheres of art and modern design. Insufficiently paid attention to the essence of artistic expression through the poster, which has historically been marginalized in relation to classical painting, has positively changed over time, and through the apostrofing of the strength and the range the poster reaches, it has pointed to the significant changes in the society that this type of communication has achieved. In this paper, a prominent event of the Academy of Arts in Novi Sad, the World Biennial of Student Poster, was selected for the case study, and through the analysis of eight exhibitions of the Biennial, its role since 2004 has been evaluated with an obvious improvement in pedagogical and creative work on the poster.

Fruit germplasm plays an important role in the glob a agrobiodiversity and is a source for both a direct use of fruit genetic resou rces as well for fruit breeding programme. The ex-situ field collection is still the main way to successf ully conserve fruit germplasm. Thirty pear accessions fr om Bosnia and Herzegovina were characterized during three years in the ex situ collection maintained by the Institute of Genetic Resources of the University of B anja Luka. The following characteristics were determined: flowering time, harv est maturity time and global tree architecture. The obtained results showed that 53.3% of pear accessions flowered during all three years, 40% of them during two years and 6.7% of them during only one year. The most present tree archite tur form was upright. According to the harvest maturity time, extremely ea rly ccessions were the most represented, than early, medium and very early pear accessions. Conserved pear germplasm in this ex situ collection represents a valuable material for dire ct use and future breeding programmes.

The aim of the present study was to evaluate the effect of one of the most important foliar diseases, powdery mildew, on the leaf physiological traits of Quercus robur L. using chlorophyll a fluorescence parameters in combination with parameters of leaf gas exchange. For this purpose, greenhouse semi-controlled experiment was conducted with 25 one-year-old seedlings kept in optimal conditions, and the same number of seedlings infected with the mentioned pathogen. Measurements were carried out when the coverage of epiphytic micelia visually reached more than 75% of the surface of leaves in the infected seedlings. The results of gas exchange measurement showed that Erysiphe alphitoides (Griffon and Maubl.) U. Braun and S. Takam caused a significant reduction of net photosynthesis (A) and a significant increase in substomatal CO2 concentration (Ci). Furthermore, considering the fast kinetics of chlorophyll a fluorescence, all of the observes parameters were significantly affected by oak powdery mildew. On the other hand, pulse amplitude modulated fluorescence parameters were mildly affected, with only minimal (Fo?) and maximal (Fm?) fluorescence of dark adopted leaves showing significant difference. This study presented the possibility of usage and the effectiveness of chlorophyll a fluorescence parameters in detection the severe stress conditions, on the example of leaves infected with oak powdery mildew over 75%. Some additional studies should be conducted in the future to determine the possibility of usage and the effectiveness of the observed fluorescence parameters of fast kinetics in detection of mild and early stress.