Energy efficient driving optimization of electrical vehicles considering the road characteristics

Electric vehicles, which are an important part of sustainable energy technologies, occupy an important place in our daily life. More efficient use of electric vehicles will ensure more efficient use of sustainable energy sources. It is not possible for the human brain to determine the most efficient driving characteristics. In this study, energy efficient driving optimization of electric vehicles was realized. Along the route, optimum speeds were determined in terms of energy, by using the road and engine characteristics. Geographical information systems and genetic algorithm have been used effectively in the solution of the problem. The effectiveness of the proposed algorithm was revealed with many test studies. With this study, an algorithm that provides an energy-efficient driving for electrical vehicles was developed. The results will contribute to the development of electric vehicle technologies

Fast and Rigorous Assignment Algorithm Multiple Preference and Calculation

The goal of paper is to develop an algorithm that evaluates students then places them depending on their desired choices according to dependant preferences. The developed algorithm is also used to implement software. The success and accuracy of the software as well as the algorithm are tested by applying it to ability test at Beykent University. This ability test is repeated several times in order to fill all available places at Fine Art Faculty departments in every academic year. It has been shown that this algorithm is very fast and rigorous after application of 2008-2009 and 2009-20010 academic years

Efficacy of talc pleurodesis for malignant and paramalignant pleural effusion: a retrospective analysis of 61 cases

Introduction: Malignant-paramalignant effusions are common after malignancies. Treatment of malign-paramalignant pleural effusion is directed towards palliation of symptoms and improvement in quality of life. Chemical pleurodesis has been widely used to control malignant and para-malignant pleural effusion. The present study aims to reveal the effects of chemical pleurodesis on malignant and paramalignant pleural effusions commonly coexisting with malignant diseases.Methods: 61 patients were retrospectively examined between October 2017 and December 2019. Drainage with 8F intrapleural catheter and chemical pleurodesis (sterile talc powder) were employed in 61 patients with malignant and/or paramalignant effusion. The patient group consisted of patients treated at the thoracic surgery service or consulted from other services. The patients demographics and data on their operated side (left/right), recurrence rate, length of postoperative hospital stay, and complications were extracted from their files.Results: The sample consisted of 48 male (78.6%) and 13 female (21.3%) patients. The patients were between 22 and 82 years and the average age was 60.0 ± 13.2 years. 33 patients (54.0%) were operated on the right side, while 7 (11.4%) and 21 (34.4%) were operated bilaterally or on the left side, respectively. The most common cause of malignant and paramalignant pleural effusion was found to be lung cancer, accounting for 38 (62.2%) of the patients. Postoperative recurrence was observed in 15 (24.5%) patients. The ‎Mann-Whitney U test was used for skewed variables, and the Chi-Square test (or Fisher’s exact test) was used for ‎categorical variables. No significant difference was observed in terms of surgery side (p=0.676), gender (p=0.156) and malignant disease (p=0.979).The average length of hospital stay was 5.3 days.Conclusions: The primary principle is to control the symptoms by removing the intrapleural effusion in the cases of malignant and paramalignant effusions. When recurrence rates were evaluated, intrapleural catheter drainage and chemical pleurodesis are an effective and safe method in selected patients

DETERMINATION OF THE TEACHER CANDIDATES' ATTITUDES TOWARDS ASTRONOMY

Astronomy has the characteristics of a key which endears science to primary students and develops their science literacy. In addition to that, the most important factor is qualified trained teachers, who have positive attitudes toward astronomy, for effective earth science education. Accordingly, the purpose of this study was to determinate teacher candidates' attitudes towards astronomy from different teacher training programs. For this surveying method study, first grade pre-service science teachers, classroom teachers and social studies teachers who study in a university on west part of Turkey were chosen as sample (N=193). "Survey of Attitudes toward Astronomy" test was applied as data collection tool. Descriptive and inferential statistics (frequency, mean, standard deviation, one-way ANOVA and Tukey HSD test) were used for the data analysis. The results showed that pre-service teachers' attitudes toward astronomy are undecided level. There is a significant differences between pre-service science teachers' and classroom teachers' attitudes scores. It can be concluded that attitudes towards astronomy might changes in terms of the different teacher training progra

Quasisynchronous LoRa for LEO nanosatellite communications

Perfect synchronization in LoRa communications between Low Earth Orbit (LEO) satellites and ground base stations is still challenging, despite the potential use of atomic clocks in LEO satellites, which offer high precision. Even by incorporating atomic clocks in LEO satellites, their inherent precision can be leveraged to enhance the overall synchronization process, perfect synchronization is infeasible due to a combination of factors such as signal propagation delay, Doppler effects, clock drift and atmospheric effects. These challenges require the development of advanced synchronization techniques and algorithms to mitigate their effects and ensure reliable communication from / to LEO satellites. However, maintaining acceptable levels of synchronization rather than striving for perfection, quasisynchronous (QS) communication can be adopted which maintains communication reliability, improves resource utilization, reduces power consumption, and ensures scalability as more devices join the communication. Overall, QS communication offers a practical, adaptive, and robust solution that enables LEO satellite communications to support the growing demands of IoT applications and global connectivity. In our investigation, we explore different chip waveforms such as rectangular and raised cosine. Furthermore, for the first time, we study the Symbol Error Rate (SER) performance of QS LoRa communication, for different spreading factors (SF), over Additive White Gaussian Noise (AWGN) channels.IEEE Communications Societ

A novel technique in the treatment of retroperitoneal lymphatic leakage: direct percutaneous embolization through the leakage pouch

Lymphangiography and percutaneous embolization of injured lymphatics are minimally invasive and effective techniques for the diagnosis and treatment of thoracic and retroperitoneal lymphatic leaks. We present a 58-year-old man who had abdominal chylous collection developed after multiple abdominal surgeries. Retroperitoneal lymphatic duct leakage was detected by ultrasound-guided intranodal lymphangiography and treated successfully using computed tomography (CT)-guided transabdominal embolization with percutaneous N-butyl cyanoacrylate (NBCA) glue and percutaneous NBCA glue and coil embolization by directly catheterizing the leaking lymphatic channel through the chylous collection. To the best of our knowledge, this is the first report of a lymphatic leakage case treated by percutaneous direct catheterization and embolization of leaking lymphatic channels through the chylous fluid collection

Exploration of seasonal metal pollution in Karacaören II Dam Lake sediment samples using X-ray Fluorescence method

In this study, the seasonal metal pollution of sediment samples taken from twelve distinct notes of the Karacaören II Dam Lake was examined. The quantity of metal in soil samples was determined using energy dispersive X-ray fluorescence spectroscopy. The geoaccumulation index and enrichment factor expressions were created using the metal concentrations found in the sediments. Seasonal values at the local, state, and international levels were compared to the findings. The ratios of the elements copper, zinc, lead, arsenic, nickel, chromium, and mercury, measured in parts per million (ppm), were found to be 42-96, 53-78, 11-14, 4- 7, 233-244, and 611-711, respectively. There is also discussion of the sediments' elemental composition and degree of pollution. In contrast, it was found that the Urbach energy increased from 0.246 eV to 0.630 eV with increasing levels of V2O5. These synthetic glasses' densities and molar volumes were also investigated and discussed

System imagining for supply chain of logging residues

Biyokütle kaynaklarından biri olan hasat artıklarının değerlendirilebilmesi; envanter, elde edinim ve yararlanma süreçlerini içermektedir. Bu çalışmada elde edinim aşaması konu edilmekte olup hasat artıklarının toplanması, biriktirilmesi, bölmeden çıkarılması, yol kenarında elleçlenmesi, yongalanması, taşınması, depolanması, vb. süreçleri içeren bir sistem yapısının kurgulanması amaçlanmıştır. Uluslar arası literatür bilgileri ve Türkiye’ deki denemeler; hasat artıklarının kullanılmasında maliyetleri ortaya çıkaran unsurların elde edinim aşamasında odaklandığını göstermiştir. Bu bakımdan hasat artıkları transport lojistik sisteminin oluşturulması gerekmektedir. Bu çalışmada bu sistemin kavramsal çerçevesi tanıtılmıştır.Evaluation of logging residues one of the sources of forest biomass, includes inventory, procurement, and utilization processes. In this study, the procurement process of logging residues was treated. It was aimed to set up a system imagining for supply chain of residuals, which consist of collecting, accumulating, extracting, handling, chipping, hauling and stocking sub-process. International literatures and experiment carried out in Turkish forestry displayed that the cost components of residuals supply chain focused on procurement phase. Therefore, it is necessary a transportation logistics system for logging residues in supply chain management concept. This study indicated the conceptual framework of the envisaged system

PiDRAM: A Holistic End-to-end FPGA-based Framework for Processing-in-DRAM

Processing-using-memory (PuM) techniques leverage the analog operation of memory cells to perform computation. Several recent works have demonstrated PuM techniques in off-the-shelf DRAM devices. Since DRAM is the dominant memory technology as main memory in current computing systems, these PuM techniques represent an opportunity for alleviating the data movement bottleneck at very low cost. However, system integration of PuM techniques imposes non-trivial challenges that are yet to be solved. Design space exploration of potential solutions to the PuM integration challenges requires appropriate tools to develop necessary hardware and software components. Unfortunately, current specialized DRAM-testing platforms, or system simulators do not provide the flexibility and/or the holistic system view that is necessary to deal with PuM integration challenges. We design and develop PiDRAM, the first flexible end-to-end framework that enables system integration studies and evaluation of real PuM techniques. PiDRAM provides software and hardware components to rapidly integrate PuM techniques across the whole system software and hardware stack (e.g., necessary modifications in the operating system, memory controller). We implement PiDRAM on an FPGA-based platform along with an open-source RISC-V system. Using PiDRAM, we implement and evaluate two state-of-the-art PuM techniques: in-DRAM (i) copy and initialization, (ii) true random number generation. Our results show that the in-memory copy and initialization techniques can improve the performance of bulk copy operations by 12.6x and bulk initialization operations by 14.6x on a real system. Implementing the true random number generator requires only 190 lines of Verilog and 74 lines of C code using PiDRAM's software and hardware components.Comment: To appear in ACM Transactions on Architecture and Code Optimizatio

A Comparative 3D Finite Element Computational Study of Stress Distribution and Stress Transfer in Small-Diameter Conical Dental Implants

The implant design is one of the main factors in implant stability because it affects the contact area between the bone and the implant surface and the stress-strain distribution at the bone-implant interface. In this study, the effect of different groove geometries on stress-strain distributions in small-diameter conical implants is investigated using the finite element method (FEM). Four different thread models (rectangular, buttressed, reverse buttressed, and symmetrical profile) are created by changing the groove geometry on the one-piece implants, and the obtained results are compared. The stress shielding effect is investigated through the dimensionless numbers that characterize the load-sharing between the bone-implant. It is determined that the lowest stress distribution is observed with rectangular profiled groove geometry. Besides, it is obtained that the buttressed groove geometry minimizes the stress effects transmitted to the periphery of the implant. The symmetrical profiles had better performance than rectangular profiles in stress transfer