Baseline Data of Low-Density Polyethylene Continuous Pyrolysis for Liquid Fuel Manufacture

The recycling of end-of-life plastics is a problem, since small parts can be returned into circulation. The rest is burned, landfilled or recycled into low-quality heating oil by pyrolysis methods. The disadvantages of this method are the need to dispose the formed by-product, pyrolytic carbon, the poor quality of produced liquid fuel and the low productivity of the method associated with the periodicity of the process. In this work, methods of thermogravimetry and chromatography–mass spectrometry (GC-MS) have been used to study the co-pyrolysis products of low-density polyethylene (LDPE) and oxygen-containing substances at the pressures of 4–8 MPa and temperatures of 520–620 °C. Experiments have highlighted the conditions needed for producing of high-quality liquid fuel. Initial data have been prepared for the design of a continuous pyrolysis reactor to dispose polymer waste for the production of bio-oil which would be available to enter the petrochemical products market.

The perfect Crème Brûlée v2

Crème Brûlée has a short ingredient list and does not require specific skills to make, but to get it right, several steps need to be carefully executed to receive the creme, not a pudding that, that is still grainy or liquid. With a caramel crust that offers a perfectly smooth surface you can break with your spoon like ice when you tap on it. Most Crème Brûlées offer one or the other but to get everything right, requires attention to details in the making. Expected results and quality criteria: 1. Crème Brûlée is served refrigerator-cold and 3-5 min after the blow-torching the sugar. Only then you have a smooth and stable caramel surface that you can crack with your spoon. Ideally, the caramel is still pleasantly warm. 2. The creme needs to be uniform and intense yellow, no gristle-like residues in it to disturb the perfect mouth feeling. While the surface is solid, the creamy consistency remains. 3. Taste: The perfect interplay between caramel and vanilla flavors (if small parts of the crust are slightly burnt -compare image - you add just a few bitter notes that make it more interesting. The added salt intensifies the vanilla flavor. 4. The crust needs to be uniform and requires a soon to be broken up in small pieces.

Dispersion Dynamics of Clustered Particles by Centrifugal Force

In this paper an approach is proposed to solve the problem of aggregation in nanomaterials through the mean of rotational separation aiming to quickly disperse clustered nanoparticles while not affecting their purity. If it is possible, this approach may replace the current mean of mechanical mixing, which may cause impurities issues. The hypothesis is that the centrifugal force due to rotational velocity acting on the nanoparticles can overcome the cohesive force between the nanoparticles, therefore dispersing the clustered nanoparticles. The experimental mean is to put different spheres connected by different types of glues imitating different nanoparticle clusters into centrifuges imitating the swivel plate. The results from both the theoretical model and the experiment show that for a cluster with a cohesive force of 1.75N, a rotational velocity of about 800rad./s is required to disperse the cluster. While for a cluster with a cohesive force of 0.25N and the same mass and position, a rotational velocity of about 150 rad./s is required to disperse the cluster. Except for the cohesive force, the mass and position of the nanoparticle on the swivel plate also have a large effect on the required rotational velocity. The observation of the physical mechanism of the dispersion has also shown that while using this way, the cluster is dispersed slowly with small parts separated from it. Therefore, this way can also eliminate re-clustering problems of nanoparticles.

Combined Effect of Marble Waste as Powder and Aggregate Form on the Proprieties of the Mortar

Recycling and recovery of waste are now considered as a solution for the future to protect the environment. The marble processing workshops on the other hand, generate a large amount of waste in the form of powder and small parts. Due to these facts, the aim of this study is to valorize marble waste in the form of powder and crushed aggregates (sand) as additions in cementitious matrix building materials. The characterization of the materials used to formulate mortars based on natural dune sand with marble powder and mortars based on mixed sand (dunes sand and crushed sand) and marble powder was measure. In this sense, several series have been studied, varying the addition rate of the marble powder in order to reduce the porosity of the cement matrix, using crushed marble sand to increase the granular cohesion and using of a reducing water admixture (MEDAPLAST SP40) for more performance mortars. Very appreciable results were observed for a dosage of 15% of marble powder and for the combination of 15% of marble powder with 20% of crushed marble sand. This research recommends recycling 35% of marble waste in the cement matrix that contribute effectively to the preservation of the environment.

An unusual right ventricular branch from left anterior descending artery.

Though it has been mentioned that a couple of small right ventricular branches also arise from the LAD supplying small parts of the anterior right ventricle (1) but no such surgical image has been published in literature in the past.

Design of an universal source for semi-automatic ac welding and induction heating

This paper proposes a circuit solution and a power source control algorithm for semi-automatic AC welding with improved energy and weight-size characteristics. A distinctive feature of the designed source is the absence of an input rectifier: welding is carried out with a high-frequency alternating current. That has made it possible to significantly reduce power losses in the source, as well as provide the possibility of implementing induction heating by connecting an inductor to the source output. Another distinctive feature of the designed source is an increased power factor and a reduced level of higher harmonics of the current consumed. The power factor of the described source reaches 0.94 against 0.5÷0.7 for sources equipped with a conventional rectifier with capacitive smoothing. The designed source's composition includes a power supply system for the wire feed drive with speed stabilization due to positive feedback on the motor current. That has made it possible to ensure the stable operation of the drive in a wide range of speeds. A model has also been developed of a flux wire welding torch containing a feed drive and a coil with a wire (up to 100 mm in diameter), placed, in order to reduce the size, in the handle of the torch. In addition to the welding function, the source makes it possible to solve the tasks related to induction heating and/or hardening of small parts; to that end, a compact inductor is connected to its output. Tests of the source showed the feasibility of the proposed ideas and circuit solutions. The dimensions of the source are 190×107×65 mm; weight, 1.4 kg; output current, up to 120 A. The proposed technical solution enables the construction of small-sized, lightweight, universal, easy-to-use power supplies for semi-automatic welding with the option of induction heating

Design Thinking: Methodological Strategy for the Creation of a Playful Application for Children with Dyslexia

The use of a methodology to address a problem facilitates work in an efficient, effective, and highly productive way. The design thinking methodology (also known as design thinking) is user-centric and oriented towards offering solutions by breaking down a problem into small parts to analyze it, to explore it, to test the results, and to create solutions that benefit the end-user. Many children have problems related to learning disorders, such as dyslexia, which occur due to the way that their brain incorporates and processes information. This can lead to them showing difficulty in some learning areas, even when their intelligence or motivation does not appear to be affected. In this research, through a mixed approach, a playful application is developed using new information and communication technologies (ICT), following a design thinking methodology, with the aim of supporting the learning of children with dyslexia through content designed with respect to their needs in order to help improve their academic performance. Data collection was carried out through observation, an interview, and record reviews. Analysis of the didactic materials allowed for the observation that content designed for the specific needs of children can work as a reinforcement for incorporating the information in an entertaining, dynamic, and friendly way, ultimately contributing to improved academic performance.

Use of Deep Learning to Improve the Computational Complexity of Reconstruction Algorithms in High Energy Physics

The optimization of reconstruction algorithms has become a key aspect in the field of experimental particle physics. Since technology has allowed gradually increasing the complexity of the measurements, the amount of data taken that needs to be interpreted has grown as well. This is the case with the LHCb experiment at CERN, where a major upgrade currently undergoing will considerably increase the data processing rate. This has presented the need to search for specific reconstruction techniques that aim to accelerate one of the most time consuming reconstruction algorithms in LHCb, the electromagnetic calorimeter clustering. Together with the use of deep learning techniques and the understanding of the current reconstruction algorithm, we propose a method that decomposes the reconstruction process into small parts that can be formulated as a cellular automaton. This approach is shown to benefit the generalized learning of small convolutional neural network architectures and also simplify the training dataset. Final results applied to a complete LHCb simulation reconstruction are compatible in terms of efficiency, and execute in nearly constant time with independence on the complexity of the data.

A BRIDLE PLATE FROM THE TOWN OF BEKESSAMSON. NEW DATA ON THE RESEARCH OF ARCHAEOLOGICAL SITES DATING TO THE PRE-SCYTHIAN - EARLY SCYTHIAN AGE IN THE SOUTH OF THE CARPATHIAN BASIN

Работа посвящена анализу распространения одного из редких вариантов уздечных блях типа обнаруженной в окрестности г. Бекешшамшон в Юго-Восточной Венгрии. В ходе рассмотрения аналогий блях, найденных в памятниках Хорватии, Сербии и Северо-Западного Кавказа, подробно изучены сопровождающие находки и обстоятельства обнаружения. В результате можно прийти к выводу, что изучаемый бронзовый предмет датируется не ранее начала - первой половины VII в. до н. э. В ходе рассмотрения мелких деталей находки обращается внимание также на недостаточно разработанную типологию деталей уздечного набора и терминологию для описания их функционального назначения. This paper analyzes the distribution of one of the rare variants of horse bridle plates found in the vicinities of the town of Bekessamson in Southeastern Hungary. Considering the analogies to the plates discovered at the sites in Croatia, Serbia and the Northwestern Caucasus, accompanying finds and circumstances surrounding the finds were carefully examined. As a result, we come to the conclusion that the bronze object, studied by the authors cannot be dated earlier than the beginning - the first half of the 7 c. BC. While carefully examining small parts of the find, attention is paid to insufficiency of typology of the horse bridle details and terminology used for describing their functional purpose.

Wideband MOEMS for the Calibration of Optical Readout Systems

The paper proposes a technology based on UV-LIGA process for microoptoelectromechanical systems (MOEMS) manufacturing. We used the original combination of materials and technological steps, in which any of the materials does not enter chemical reactions with each other, while all of them are weakly sensitive to the effects of oxygen plasma. This made it suitable for long-term etching in the oxygen plasma at low discharge power with the complete preservation of the original geometry, including small parts. The micromembranes were formed by thermal evaporation of Al. This simplified the technique compared to the classic UV-LIGA and guaranteed high quality and uniformity of the resulting structure. To demonstrate the complete process, a test MOEMS with electrostatic control was manufactured. On one chip, a set of micromembranes was created with different stiffness from 10 nm/V to 100 nm/V and various working ranges from 100 to 300 nm. All membranes have a flat frequency response without resonant peaks in the frequency range 0–200 kHz. The proposed technology potentially enables the manufacture of wide low-height membranes of complex geometry to create microoptic fiber sensors.