Diseño y construcción de un secador solar para el secado de madera de baja densidad

The purpose of this research was to demonstrate that the use of residual oil as a heat transport fluid and the use of rice husk as a thermal insulator is an efficient alternative for the greater use of solar energy. For this, a prototype of a solar dryer was designed and built consisting of a flat solar thermal concentrator and a parabolic cylindrical thermal concentrator (CCP), this was validated by drying Guazuma crinita, Mart. (White ball) and monitored by a contact hygrometer. Five tests were carried out, the first test was considered as a control, in which heat transport fluid and thermal insulators were not used, and in the following four tests two types of heat transport fluids were combined (residual motor oil and brine) and two types of thermal insulators (wood sawdust and rice husk), obtaining as a result that the most efficient test was number three, consisting of residual motor oil as heat transport fluid and rice husk as thermal insulator. With the most efficient test, the prototype was validated by drying low-density wood, reducing the humidity of the wood from 45.8% to 12.3% in ten sunny days.

Application of Deep Learning Convolution Neural Network Method on KRSBI Humanoid R-SCUAD Robot

In a soccer game the ability of humanoid robots that one needs to have is to see the ball object in real time. Development of the ability of humanoid robots to see the ball has been developed but the level of accuracy of object recognition and adaptation during matches still needs to be improved. The architecture designed in this study is Convolutional Neural Network or CNN which is designed to have 6 hidden layers with implementation of the robot program using the Tensorflow library. The pictures taken are used in the training process to have 9 types of images based on where the pictures were taken. Each type of image is divided into 2 classes, namely 2000 images for ball object classes and 2000 images for non-ball object classes. The test is done in real time using a white ball on green grass. From the architectural design and white ball detection test results obtained a success rate of 67%, five of the nine models managed to recognize the ball. The model can recognize objects with an image processing speed of a maximum of 13 FPS.Dalam pertandingan sepak bola kemampuan robot humanoid yang perlu dimiliki salah satunya adalah melihat objek bola secara real time. Pengembangan kemampuan robot humanoid untuk melihat bola telah dikembangkan tetapi tingkat akurasi pengenalan objek dan adaptasi saat pertandingan masih perlu ditingkatkan. Arsitektur yang dirancang pada penelitian ini yaitu Convolutional Neural Network atau CNN yang dirancang memiliki 6 hidden layer dengan implementasi pada program robot menggunakan library Tensorflow. Gambar yang diambil digunakan dalam proses training memiliki 9 jenis gambar berdasarkan tempat pengambilan gambar. Tiap jenis gambar terbagi menjadi 2 class yaitu 2000 gambar untuk class objek bola dan 2000 gambar untuk class objek bukan bola. Pengujian dilakukan secara real time dengan menggunakan bola berwarna putih di atas rumput hijau. Dari perancangan arsitektur dan hasil pengujian pendeteksian bola putih didapatkan persentase keberhasilan 67% yaitu lima dari sembilan model berhasil mengenali bola. Model dapat mengenali objek dengan kecepatan pengolahan gambar adalah maksimal 13 FPS.

Correlation of magnetic resonance imaging and radionuclide bone imaging findings of femoral head necrosis

Objectives To investigate the radionuclide bone imaging (RBI) manifestation of femoral head necrosis (FHN) in different magnetic resonance imaging (MRI) findings. Materials and Methods 72 hips in 42 patients with FHN underwent MRI and RBI examination to observe the RBI manifestation of FHN in different MRI types. Results There were 23 hips with MRI Type I FHN, 11 hips showing the corresponding RBI manifestation of ‘hands-holding-a-white-ball sign’ and 7 hips showing the ‘doughnut sign’. There are thirty-seven hips with MRI Type II FHN, 16 hips showing the corresponding RBI manifestation of diffusely increased uptake, 7 hips showing the ‘hands-holding-a-black-ball sign’, 7 hips showing the ‘doughnut sign’ and 4 hips showing the ‘hands-holding-a-white-ball sign’. There were 12 hips with Type III FHN, 11 hips showing the corresponding RBI manifestation of diffusely increased uptake and 1 hip showing the ‘hands-holding-a-black-ball sign’. The ‘hands-holding-a-white-ball sign’ in Type I FHN was significantly higher than that of Type II-III FHN (P<0.05), and the diffusely increased uptake in Type I FHN was significantly lower than that of Type II-III FHN (P<0.05). Conclusions Different MRI findings of FHN lead to diverse RBI findings . In addition, the ‘doughnut sign’, the ‘hands-holding-a-white-ball sign’ and the ‘hands-holding-a-black-ball sign’ also have diagnostic value for FHN.

Pink Cricket Balls May Be Visually Challenging at Sunset

Cricket is one of the world’s most popular sports, followed by hundreds of millions of people. It can be dangerous, played with a hard ball flying at great velocities, and accidents have occasionally been fatal. Traditionally, cricket has been played during the day, using a dark red ball. Since the late 1970s, a shorter form of one-day cricket has been played both during the day and at night under floodlights. To overcome visibility issues, one-day cricket uses a white ball, and players wear coloured clothing. There is now a desire to play a traditional form of cricket during the day and at night, using a ‘pink’ ball while players wear white clothing. Concerns regarding visibility, and player and umpire safety, have been raised in this context. Here, we report that these concerns have a sound basis.

Qigongas a Traditional Vegetative Biofeedback Therapy: Long-Term Conditioning of Physiological Mind-Body Effects

A contemporary understanding of Chinese Medicine (CM) regards CM diagnosis as a functional vegetative state that may be treated by vegetative reflex therapies such as acupuncture. Within this context, traditional mind-body exercises such asQigongcan be understood as an attempt to enhance physiological proprioception, by combining a special state of “awareness” with posture, movement, and breath control. We have formerly trained young auditing flutists in “White Ball”Qigongto minimize anxiety-induced cold hands and lower anxiety-induced heart rate. Functional changes occurred 2–5 min after training and were observed over the whole training program, allowing the children to control their symptoms. In our current work, we report that warm fingers and calm hearts could be induced by the children even withoutQigongexercises. Thus, these positive changes once induced and “conditioned” vegetatively were stable after weeks of training. This may show the mechanism by whichQigongacts as a therapeutic measure in disease: positive vegetative pathways may be activated instead of dysfunctional functional patterns. The positive vegetative patterns then may be available in critical stressful situations.Qigongexercise programs may therefore be understood as an ancient vegetative biofeedback exercise inducing positive vegetative functions which are added to the individual reactive repertoire.