APPLICATION OF AUGMENTED REALITY TOOLS TO THE DESIGN PREPARATION OF PRODUCTION

The paper describes the application of augmented reality tools to create an auxiliary interactive tool in the field of design. To mediate it, an application with AR operation based on marker tracking has been designed. The created application works with the mobile devices platform. Two types of markers have been used in the application. To display basic information, buttons with functions are added to the scene, such as part information, rotation and change of position in the X, Y, Z direction. The application runs on a mobile phone, with a built-in camera. The marker is displayed in the drawing's lower left corner. The model is positioned so that it appears above the view of the part in the drawing. The task of the application is to support intelligent tools applicable in the design stage of production preparation, in the creation of drawing documentation.

Ventilation of Square Cavity Containing a Heat Source

A numerical simulation of turbulent mixed convection of a ventilated cavity containing a heat source placed of the center has been carried out. This cavity is outfitted along couple holes: one placed within the lower left corner and the other in the top right corner. The width of the hole "H" represents is 1/5 of the length of the cavity side. The diameter regarding the round heat source "D" is equal in accordance with the breadth of the inlet gap’s H (D = H). The walls of the cavity considered are maintained adiabatic, while the temperature of the heat source T is higher than the ambient temperature. The turbulence model k-ε was used for governing equations of turbulent mixed convection inside the cavity. The finite volume method was used for numerical resolution. The parameters of flow are: the Grashof number is set to Gr = 109 and the Reynolds number (Re) varies so that the number of Richardson (Ri) takes the values Ri = 0.01, 0.05, 0.1, 1, 2, 5, 10, 20 and 30 (Ri = Gr/ Re2). The effect of thermo-dynamic parameters and the shape geometric cavity effect are investigated.

Restaurarea unei picturi pe pânză de Aurél Náray (1883–1948)

"The restoration of a painted canvas by Aurél Náray (1883-1948) This study shows the restoration work made on the painted canvas of the Hungarian artist Aurél Náray (1883-1948), depicting an ecclesiastic subject (Saint Joseph with the infant Jesus). This oil painting comes from a private art collector and has the following dimensions: 42x57.5 cm, being sustained by a wooden stretcher. The painting is signed and dated by the artist himself on the lower left corner (“Aurél Náray 909”). The canvas is fixed on the underframe with metallic nails; as a result of the wood having dried, the frame shows slight distortions. The face of the painting displays small portions of missing white primer and/ or colour, erosions of the paint layer, two little punctures in the canvas, and a small area of distorted canvas placed toward the lower edge of the painting. Adherence of thin dirt can be observed on the surface of the painting while the back of the canvas bears heavy traces of dust and dirt, especially on its margins. The actual restoration process of the painted canvas referred to the following: drawing up the initial photograhic documentation, superficial dust cleaning on the back of the canvas, detachment of the painting from its old underframe and the building of a new and proper wooden stretcher. After the plainness of the painting was restored and the two small pricked points on the canvas were consolidated (with the use of Beva 371 adhesive), a strip lining on the margins of the canvas was carried out, in order to be able to fix the canvas on the new underframe. Cleaning of the surface came next, followed by the filling of the missing primer layer with putty. The chromatic integration of the painting was accomplished (after having sealed the original paint with a thin layer of intermediary varnish) with the use of low oil content colours and the final protection of a second satin varnish layer. Keywords: painted canvas, restoration, stretcher, strip lining, varnish "

DIGITAL FIXATION OF THE 10TH CENTURY BURIAL

In 2018 the expedition headed by O. P. Motsia explored the territory of Chernihiv suburb. The burial mounds and flat burial grounds appeared here periodically since the 10th century. The aggressive chemical composition of local soils has a very negative effect on the survival of metal artifacts and organic materials complicating their study and fixation. In such a situation it is appropriate to use the field digital capture the photogrammetric method that allows create a 3D-model of objects and artifacts with authentic size which will allow the metrological measurements later in the laboratory. One of these poor survived objects was made into virtual space for further elaboration. In the grave 3 the remains of child skeleton have been discovered. Only some limb bones, the fragment of the jaw and traces of bone tissue in the soil were preserved. The grave 3 was digitally captured using a camera and a series of snapshots from different points, and then the 3D-model of the object was created. On the basis of markers and measuring battens the authentic dimensions and orientation in space was given the model which allowed further metrological measurements of bones and artifacts. Particular attention is drawn to the wooden bucket in the lower left corner of the coffin. Rather, the prints and oxides of the metal parts of the bucket which completely have dissolved in the soil having left only the outline. Right away the performed photogrammetric fixation of the artifact under field conditions has been done. On the basis of the 3D-model the orthophotos with different projections have been created, which completely replace the graphic drawings and can be included to the scientific report. Using the specialized program it is possible to measure all elements of the object. The newest methods allowed to measure the item and visualize the object for public access.

Designing Smart Student Savings Tools Based on Arduino and Web

In this modern era, everything is done easily, from electronic equipment to electronic transactions is developed increasingly sophisticated. The equipment and sophisticated electronic transactions turned out to have major problems that could result in dissipation, especially students in schools. The purpose of this study is to create and design a smart savings machine tool, where this machine will be controlled via RFID and a sensor with a microcontroller, so that each individual can learn to economize in managing finances. This machine is designed by adding a color sensor for depositing and withdrawing cash with only three nominal banknotes, namely Rp. 10,000, Rp. 5,000 and Rp. 2,000. Furthermore, this device is also able to calculate the financial balance that has been entered. As an input, Arduino Mega 2560 is needed for data processing. Whereas, the color sensor output is used to read the basic colors red, green and blue on the surface of the lower left corner of the rupiah banknotes. This tool works as desired, can read RFID (Radio Frequency Identification) cards that have been determined and the color sensor can respond to colors on a nominal bill of Rp 2,000, Rp.5,000 or Rp. 10,000 and able to detect the time when saving and accumulating the balance. To attract money into the storage area, two DC motors are used. When the TCS230 color sensor detects money, there are several times that the currency is unreadable due to the influence of external light which causes the sensor to be inaccurate in reading the frequency value of the money color.

Design of Ultra Wideband Patch Antenna

This paper presents an ultra wideband(UWB) antenna which is in rectangular shape is designed and analyzed by Microwave Studio Computer Simulation Technology(MS CST).The antenna uses FR-4 substrate. The rectangular patch which is excited by micro strip line is printed on the top of the substrate and a partial ground plane is printed on the other side. The basic structure of antenna produces ultra-wideband characteristics. But these characteristics can further be improved by cutting the lower left corner of the patch as stair case and observed the simulated results like return loss(S11), voltage standing wave ratio(VSWR), gain and bandwidth(BW).

Moisture accumulation analyses over windowpane, based on onsite measurements in sleeping room

The current paper presents moisture accumulation analyses over windowpane, based on onsite measurements in genuine sleeping room. During the measurements, the room was occupied with two adults and a baby, and the occupant’s behaviour was not additionally modified. The examination of the results represented the generic conditions for the windowpane condensation appearance, without taking into account the window assembly properties or the building construction. The studied windowpane has visually confirmed condensation in the lower left corner. This moisture accumulation is confirmed by the obtained measurement results near the windowpane, which clearly showed lower air temperature and higher relative humidity, compared with the rest of the occupied space. Thermal images also confirm this effect, and give better interpretation of the time periods, at which the surface temperature of the windowpane is lower than the dew point temperature in the affected zone. The analysed results offer important understanding of the interference of the different indoor parameters, related to the generic conditions for windowpane condensation appearance. These results may contribute the development of numerical model, capable to predict the heat losses and the moisture accumulation processes, in such affected areas from the building envelope.

New Detection Paradigms to Improve Wireless Sensor Network Performance under Jamming Attacks

In this work, two new self-tuning collaborative-based mechanisms for jamming detection are proposed. These techniques are named (i) Connected Mechanism and (ii) Extended Mechanism. The first one detects jamming by comparing the performance parameters with respect to directly connected neighbors by interchanging packets with performance metric information, whereas the latter, jamming detection relays comparing defined zones of nodes related with a collector node, and using information of this collector detects a possible affected zone. The effectiveness of these techniques were tested in simulated environment of a quadrangular grid of 7 × 7, each node delivering 10 packets/sec, and defining as collector node, the one in the lower left corner of the grid. The jammer node is sending packets under reactive jamming. The mechanism was implemented and tested in AODV (Ad hoc On Demand Distance Vector), DSR (Dynamic Source Routing), and MPH (Multi-Parent Hierarchical), named AODV-M, DSR-M and MPH-M, respectively. Results reveal that the proposed techniques increase the accurate of the detected zone, reducing the detection of the affected zone up to 15% for AODV-M and DSR-M and up to 4% using the MPH-M protocol.

Floristic Composition in Chronosequence in Atlantic Rainforest Fragments

Secondary forests play an important role in tropical landscapes and have important ecological functions such as the ability to accumulate biomass. Although the literature points to the convergence between primary and secondary forests, however there are few studies in Atlantic Rainforest in a chronosequence to show it. This study aimed to characterize the changes of floristic composition in a chronosequence (5, 16, 24, 30 years of regeneration and mature forest) in the Atlantic Rainforest. In each forest 30 plots of 10 × 10 m were installed for canopy sampling, and within these 100 m2 were installed plots of 5 × 5 m for sampling the woody sub-forest at the lower left corner. The growth habits analyzed were arboreal (diameter at breast height, DBH ≥ 5 cm), shrubs (DBH < 5 cm and stem diameter at ground level > 1 cm), herbs, epiphytes and climbing plants. The results suggest that from 16 young forests tended to converge with the mature forest in terms of the proportion of growth forms.

A Fast Algorithm to Generate Feasible Solution of Production Facilities Layout Based on Plane Segmentation

For facility layout problem with continuous block and unequal area, it is key to generate feasible solution of facility layout with arbitrary space form in order to find the optimal arrangement scheme under a given goal. According to the given slicing position and slicing mode, the plane for arrangement was divided into many block areas by use of plane segmentation, which was consistent with the facilities in number. The precise coordinates of the lower-left corner and the top-right corner of each facility were calculated in light of its area, width, and length. The corresponding algorithm was designed in the form of pseudocode. The procedure proposed can provide a feasible facility layout solution. The running results of facilities layout instance containing 14 facilities show that the scheme can output facilities plane layout scheme quickly and provide decision support for the facilities planning.