Effect of astrocyte on synchronization of thermosensitive neuron-astrocyte minimum system

Astrocytes have a regulatory function on the central nervous system (CNS), especially in the temperature sensitive hippocampal region. In order to explore the thermosensitive dynamic mechanism of astrocytes in CNS, we establish a neuron-astrocyte minimum system to analyze the synchronization change characteristics based on Hodgkin-Huxley model, in which a pyramidal cell and an interneuron are connected by an astrocyte. Besides, the temperature range set 0°C-40°C to juggle theoretical calculation and reality of brain environment. It is represented that the synchronization of thermosensitive neurons exhibits nonlinear behavior with change of astrocyte parameters. At temperature range of 0°C-18°C, the effects of astrocyte can provide tremendous influence to neurons in synchronization. We found existence of a value for inositol triphosphate (IP3) production rate and feedback intensities of astrocyte to neurons, which can ensure the weak synchronization of two neurons. In addition, it is revealed that the regulation of astrocyte to pyramidal cell is more sensitive than that to interneuron. Finally, it is shown that the synchronization and phase transition of neurons depend on the change of Ca2+ concentration at the temperature of weak synchronization. The results in this paper would provide some enlightenment in mechanism of cognitive dysfunction and neurological disorders with astrocytes.

Oxygen Availability Control and Monitoring System in Hospitals using IoT

Medical Gas is an important component in the treatment of patients with COVID-19 disease. Medical gas is used to help COVID-19 patients to reduce the effects of respiratory disorders by providing oxygen ventilators to patients. With the surge in typical COVID-19 sufferers as of July 2021, the need for Oxygen in hospitals is getting higher. This is when the control and monitoring of medical gases in hospitals are late because the integrated system is very dangerous. Therefore, a system that can be used to control and monitor medical gases in hospitals that are integrated and automated and can be monitored by the Government and Medical Gas Producers. This is useful for anticipating the lack of availability of Medical Gas in hospitals. In this study, the system used IoT systems as a base in delivery and control. This system uses Arduino as a minimum system that reads the press sensor on the Medical Gas tube and regulates the valve. The data obtained is then sent to the Local Server to be processed and delivered to the Hospital Officer. Local Servers also send the data to cloud servers to be monitored by the government funds of several medical gas producers. This design can help in the process of controlling and monitoring Medical Gases in hospitals in hopes of minimizing the risk of delays in supplying medical gases to hospitals.

Design and Realization of Garage Access Control System Based on STM32 microcontroller minimum system technology

This paper designs and implements a community access control system based on STM32 microcontroller minimum system technology. A power unit composed of steering gear and simple lifting rod device is designed. According to the actual demand, a display device composed of buzzer alarm device and display screen is designed. Considering the need of camera recognition, the program of camera recognition process is designed, the database is written, and the license plate of this area is stored in advance. The system can make the license plate can be recognized by the camera automatically, and through the comparison with the database, the lifting rod or the buzzer alarm is realized. The access control system is of great significance to the control of vehicle entering and leaving and the safety of the community.

Key-Phase-Free Blade Tip-Timing for Nonstationary Test Conditions: An Improved Algorithm for the Vibration Monitoring of a SAFRAN Turbomachine from the Surveillance 9 International Conference Contest

A turbomachine is a fundamental engineering apparatus meant to transfer energy between a rotor and a fluid. Turbomachines are the core of power generation in many engineering applications such as electric power generation plants, aerospace, marine power, automotive etc. Their relevance makes them both mission critical and safety critical in many fields. To foster reliability and safety, then, continuous monitoring of the rotor is more than desirable. One promising monitoring technique is, with no doubt, the Blade Tip-Timing, which, being simple and non-invasive, can be easily implemented on many different rotors. Blade Tip-Timing is based on the recording of the time of arrival of the blades passing in front of a probe located at a fixed angular position. The non-contact nature of the measurement prevents influences on the measured vibration, that can be recovered for all the blades simultaneously, possibly even online. In this regard, a novel algorithm is presented in this paper for obtaining a good estimate of the vibration of the blades with minimum system complexity (i.e., only one Blade Tip-Timing probe) and minimum computational effort, so to create a simple vibration monitoring system, potentially implementable online. The methodology was tested on a dataset from a SAFRAN turbomachine made available during the Surveillance 9 international conference for a diagnostic contest.

Economic and bioenergy efficiency of sunflower cultivation depending on agricultural receptions

When assessing the economic efficiency of sunflower production in enterprises, it is necessary to correctly determine the system of interrelated indicators that should most objectively reflect its level. The aim of the research was to determine the economic and bioenergetic efficiency of sunflower cultivation depending on the method of basic tillage, dose of mineral fertilizers and growth regulators. The studies were conducted in 2016-2018 at the fields of the Institute of Oil Crops of the UAAS. The sowing was carried out at a depth of seed wrapping of 6-7 cm with a row spacing of 70 cm with a seeding rate of 50 thousand similar seeds per hectare. Basic tillage systems: classic – two-track disc, plowing (PN-3-35) to a depth of 22-25 cm; bottomless – two-track disc, endless tillage (KLD-3.0) to a depth of 25-27 cm; minimal – two-track discus, cultivation (KPS-4,0) to a depth of 10-12 cm. Mineral fertilizer application options: 1. Control – no fertilizer, 2. N40, 3. N40P60, 4. N60P60K60. Application options: 1. Control – treatment with water (250 l/ha), 2. Rost- concentrate + Oil gelatin (6-8 pairs of true leaves), 3. Forte gelatin + Mono boron gelatin (6-8 pairs of true leaves), 4. Mono boron chelate + Phosphate-potassium chelate (6-8 pairs of true leaves), 5. 1 treatment: Phosphate-potassium chelate + Multimix gelatin + Mono boron chelate (3-4 pairs of true leaves), 2 treatment: Mono gelatin boron (6-8 pairs of true leaves). The highest yield of sunflower hybrid Ratnik – 3.46 and 3.45 t/ha obtained by cultivation under the classical system of basic tillage, fertilization at a dose of N60P60K60 for pre-sowing cultivation and the second and fifth variants of application of the preparations: 2. Growth concentrate + Oil gelatin (6-8 pairs of true leaves); 5. 1 treatment: Phosphate-potassium chelate + Multimix gelatin + Mono boron gelatin (3-4 pairs of true leaves), 2 treatment: Mono boron gelatin (6-8 pairs of true leaves). The highest yield increase from the application of mineral fertilizers was obtained when fertilizing at a dose of N60P60K60 for all systems of basic tillage and is within: for classical – 0.52-0.64 t/ha; for landless – 0.40-0.51 t/ha; at the minimum – 0.35-0.45 t/ha. It should be noted that the cultivation of sunflower crops with growth stimulants in all their applications has led to an increase in yield: in the classical system of basic tillage by 0.13-0.32; for non-drained – 0.08-0.25 and for the minimum – 0.09-0.25 t/ha. The most effective under all other conditions of cultivation was the use of a mixture of preparations Growth-concentrate + gelatin oil. Indicators of economic efficiency of sunflower hybrid cultivation Ratnik, calculated at prices on 01.03.2021, varied depending on the options for the use of mineral fertilizers, growth regulators and methods of basic tillage. Taking into account the cost of the obtained products and the costs of its cultivation, the profit is obtained depending on the background of mineral nutrition and the application of growth regulators: 45156-57059 UAH/ha under the classic system of basic tillage with a profitability of 403-654 %; 41822-50349 UAH/ha for a bottomless system with a level of profitability of 358-616 %; 40699-48110 UAH/ha under the minimum system with a level of profitability of 359-642 %. The highest profit was obtained under the classical system of basic tillage, which exceeded this figure by 3334-7505 and 4457-9417 UAH/ha for bottomless and minimum systems. The most effective was the cultivation of sunflower hybrid Ratnik under the classical system of basic tillage against the background of mineral fertilizers at a dose of N40 and spraying crops in the phase of 6-8 pairs of true leaves with a mixture of Rost-concentrate + Helatin oil. The bioenergy efficiency of the studied agricultural methods varied depending on the options for the use of mineral fertilizers, growth regulators and methods of basic tillage. Taking into account the gross energy yield and total energy consumption for cultivation, the increase in gross energy was obtained, depending on the background of mineral nutrition and the variant of application of growth regulators: 45599-54678 MJ/ha under the classical system of basic tillage with energy coefficient 2.16-4.28; 42346-48528 MJ/ha for a bottomless system with an energy factor of 1.98-4.22; 40900-45998 MJ/ha for the minimum system with an energy factor of 1.92-4.18. The largest increase in gross energy was obtained in the classical system of basic tillage, which exceeded this figure by 3253-7048 and 4699-9216 MJ/ha in the bottomless and minimum systems. The most efficient in terms of energy indicators was the cultivation of sunflower hybrid Ratnik under the classical system of basic tillage against the background of mineral fertilizers at a dose of N40P60 and spraying crops in the phase of 6-8 pairs of true leaves with a mixture of Rost-concentrate + Chelatin oil.

A lifecycle cost model considering both component and system burn-in for operationally unrepairable systems

PurposeThis study presents a lifecycle cost model considering multi-level burn-in for operationally unrepairable systems including assembly and warranty costs. A numerical method to obtain system reliability under component replacement during burn-in is also presented with derived error bounds.Design/methodology/approachThe final system reliability after component and system burn-in is obtained and warranty costs are computed. On failure during operation, the system is replaced with another that undergoes an identical burn-in procedure. Cost behaviours for a small and large system are shown in a numerical example.FindingsThere are more cost savings when system burn-in is conducted for a large system whereas a strategy focusing on component burn-in only can also result in cost savings for small systems. In addition, a minimum system burn-in duration is required before cost savings are achieved for these operationally unrepairable systems.Originality/valueThe operationally unrepairable system is a niche class of systems which small satellites fall under and no such study has been conducted before. The authors present a different approach towards the testing of small satellites for a constellation mission.

Medical Healthy Detection Dengan Parameter Tinggi Badan dan Berat Badan

Pemeliharaan kesehatan adalah upaya penanggulangan dan pencegahan gangguan kesehatan. Salah satu dari sekian banyak yang menyebabkan kesehatan terganggu adalah masalah obesitas atau kegemukan, dan masalah obesitas merupakan hal yang paling banyak terdapat dikalangan masyarakat lokal bahkan di dunia. Penelitian ini bertujuan untuk membuat dan mendesain alat ukur tinggi dan berat badan serta Indeks Massa Tubuh objek dengan tampilan hasil pada LCD dan tersimpan di SD Card. Pada sensor ultrasonic maskimal tinggi badan yang dapat diukur yaitu sebesar 200cm dan pada sensor load cell maksimal berat badan yang dapat di ukur yaitu sebesar 150kg, dalam pembuatan alat tersebut semua sistem dikontrol oleh minimum system arduino Uno. Dari penelitian yang dilakukan terhadap 5 orang sebagai objek pengukuran didapatkan hasil pengukuran rata-rata berat badan sebesar 51,76 kg dengan rata-rata persentase error sebesar 0,6% dan rata-rata tinggi badan sebesar 159,4 cm dengan rata-rata persentase error sebesar 0,2%. Setelah dilakukan penelitian secara umum dapat disimpulkan bahwa alat Medichal Healthy Detection dapat digunakan dengan baik dan masih dalam nilai ambang batas toleransi +- 1%.

SELF-MONITORING OF BLOOD GLUCOSE WITH A NON-INVASIVE METHOD USING NEAR INFRARED SENSOR

Diabetes mellitus or commonly called diabetes is a worldwide epidemic caused by chronic hyperglycemia. Simplify the blood glucose monitoring and easy to use is an essential part of diabetes management. Currently, the use of blood glucose meters conventional in clinical practice needs sufficient reliability. Therefore, self-monitoring of blood glucose with a non-invasive method was presented. A non-invasive blood glucose monitoring device was initially for information on glucose level measurements. A non-invasive method to determine the level of glucose by applying the physical properties of the absorption of the laser sensor that can produce a voltage change at various glucose levels. In this paper, a glucose monitoring module was fabricated with dimensions of 25x27x15 cm which has a minimum system, sensor, and LCD as a display of glucose levels. A minimum system to control the output of data digital value using microcontroller Android nano v.3. Experimentally, testing this module is by comparing the glucose monitoring modules that have been made with a gold standard. The result showed that non-invasive glucose monitoring is the potential for glucose level measurement a sensitivity, resolution, and accuracy of 0.86 mg/dL, 0.01 mg/dL, and 98.96%, respectively. The purposed module of glucose level monitoring offered simple testing for the rapid measurement of glucose levels.

RANCANG BANGUN SISTEM MONITORING PENGUKUR CUACA MENGGUNAKAN MINIMUM SYSTEM ARDUINO

Pengamatan unsur cuaca sangat diperlukan oleh manusia. hampir semua kalangan membutuhkanya, mulai dari instansi pemerintah, swasta, perorangan, bahkan pelajar dan mahasiswa terkadang juga membutuhkan data-data cuaca tersebut. Namun BMKG selaku penyedia data cuaca di indonesia tidak bisa memberikan data cuaca tersebut ke sembarang orang, terlebih lagi data mentah. Dengan perkembangan teknologi sekarang dan memanfaatkan IoT kita bisa membuat alat pengukuran cuaca dan data logger sendiri. data ini nantinya juga bisa bermanfaat dan diakses oleh semua orang. dengan memanfaatkan minimum sistem/mikroontroler dan beberapa sensor-sensor, alatnya pun juga akan lebih praktis(portable) dan lebih murah. namun pastinya alat ini juga memiliki kekurangan seperti nilai keakuratannya yang sedikit kurang jika dibanding dengan alat ukur yang sudah ada Sistem dan alat dapat bekerja dengan cukup baik, hal ini ditunjukkan dengan semua sensor mampu menangkap besaran fisik disekitarnya dan menampilkanya pada website monitoring. Meskipun tidak seakurat alat yang sudah ada dan memiliki nilai error.