30 research outputs found
Distance learning: opportunities and challenges in quarantine.
The urgent introduction of distance education into the learning process due to the COVID-19 pandemic has become a spontaneous experiment, requiring urgent decisions, effective mechanisms to implement into the educational process and analysis of ongoing educational process. The possibilities of modern digital technologies made it possible to quickly set up the information component of education and to controle studentβs knowledge. A detailed analysis of the communication between the faculty members of the department among themselves and analysis of the features of teaching and self-education of students in the field of medical radiology and oncology based on answers and comments with using Google classroom, Socrative, Messenger Telegram, etc. was made. Issues of communicative interaction between faculty members and students, psychological aspects of distance communication, language of instruction, logistics of distance education and methodological problems are described in details. It has been suggested that distance education may be equally effective for theoretical subjects in full-time study form, but when studying clinical disciplines, the priority should be given to traditional methods of teaching, involving student's bedside training. Taking into account technical possibilities and high risk of development of extreme and emergency situations, it is suggested to introduce permanent readiness for distance education, to create all β Ukrainian distance imitation service of patientsβ follow-up. The importance of using the state language in training as the basis for mastering the professional Ukrainian and English language as the basis for mastering international medical experience is indicated
Internet-based remote sensing and manipulation in micro environment
Recent developments in the Internet have significantly increased the human capability to reach and obtain information from remote locations. In parallel, the advent of micro sensors and actuators makes it possible for humans to sense and act in a microenvironment. Combined, the Internet and ME will produce a new technology for humans to sense and act in remote microenvironments, allowing the potential development of micro teleoperation and micro automation technologies. These new technologies have potential impact on several fields, including remote micro-automation and biomedical engineering. In this paper, we will present our ongoing development of polyvinylidence fluoride (PVDF) sensors that can be used force-reflective control of micromechanical devices over the Internet. Internet based teleoperation between Hong Kong and Michigan State was demonstrated using an event-based control scheme, which ensured stability and synchronization. Control was enhanced by multimedia feedback, which included, in add ition to the traditional video, force feedback. The force fed back augmented the limited information supplied by visual feedback. We believe this project will eventually make a great impact to the globalization of MEMS foundries because it will allow global users to micro-assemble and micro-manipulate surface micromachined devices from their laboratories, and hence, reduce the time from design to production significantly.Link_to_subscribed_fulltex
A bone reaming system using micro sensors for Internet force-feedback control
The development of a medical surgical tool packaged with micro sensors for transmission of Supermedia information over the Internet is described in this paper. We define Supermedia as a set of communication media, which encompasses acoustic, force, visual, audio, temperature, tactile, and chemical (e.g., taste an smell) information, and which can be physically experienced by a communicator. In this project, we specifically develop Supermedia capability for a bone-reaming system that is used for intramedullary fixation procedure of fractured bone treatments. Thus far, transmission of temperature, force, and pressure information from MEMS sensors over the Internet has been demonstrated. Force-reflective control over the Internet using force information from a micro tip has also been shown. We have also packaged a MEMS pressure sensor inside a bone reaming guide-rod and proved that pressure variations inside a long cavity that simulated the environment inside a bone can be monitored, even with the guide-rod rotating up to 600rpm. This paper describes our experimental methods and gives the experimental results for these accomplishments.Link_to_subscribed_fulltex
Modeling and control of Internet based cooperative teleoperation
Robotic operations carried out via the Internet face several challenges and difficulties. These range from human-computer interfacing and human-robot interaction to overcoming random time delay and task synchronization. These limitations are intensified when multi-operators at multi-sites are collaboratively teleoperating multi-robots to achieve a certain task. In this paper, a new modeling and control method for Internet-based cooperative teleoperation is developed. Combining Petri Net model and event-based planning and control theory, the new method provides an efficient way to model the concurrence and complexity of the Internet-based cooperative teleoperation. It also provides an efficient analysis tool to study the stability, transparency and synchronization of the system. Furthermore, the new modeling and control method enables us to design an Internet-based cooperative telerobotic system that is reliable, safe and intelligent. This new method has been experimentally implemented in a three site tes t bed consisting of robotic laboratories in the USA, Hong Kong and Japan. The experimental results have verified the theoretical development and further demonstrated the advantages of the new modeling and control method.Link_to_subscribed_fulltex
Multi-site real-time tele-cooperation via the Internet
Robotic operations carried out via the Internet face several challenges and difficulties. These range from human-computer interfacing and human-robot interaction to overcoming random time delay and task synchronization. These limitations are intensified when multi-operators at multi-sites are collaboratively teleoperating multi-robots to achieve a certain task. In this paper, a new modeling and control method for Internet-based cooperative teleoperation is developed. Combining the Petri Net model and event-based planning and control theory, the new method provides an efficient way to model the concurrence and complexity of the Internet-based cooperative teleoperation. It also provides an efficient analysis tool to study the stability, transparency and synchronization of the system. Furthermore, the new modeling and control method enables us to design an Internet-based cooperative telerobotic system that is reliable, safe and intelligent. This new method has been experimentally implemented in a three-site test bed consisting of robotic laboratories in the USA, Hong Kong and Japan. The experimental results have verified the theoretical development, and further demonstrated the advantages of the new modeling and control method.Link_to_subscribed_fulltex
ΠΡΠΎΠ³Π½ΠΎΡΡΠΈΡΠ½Π° ΡΡΠ½Π½ΡΡΡΡ ΠΊΠ»ΡΠ½ΡΡΠ½ΠΈΡ , Π»Π°Π±ΠΎΡΠ°ΡΠΎΡΠ½ΠΈΡ ΡΠ° ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΈΡ ΠΏΡΠ΅Π΄ΠΈΠΊΡΠΎΡΡΠ² Ρ ΡΠΎΡΠΌΡΠ²Π°Π½Π½Ρ ΠΏΠ΅ΡΡΠΎΠ½ΠΈΡΡΠΊΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠ΄Ρ ΠΎΠ΄ΡΠ² Π΄ΠΎ Π»ΡΠΊΡΠ²Π°Π½Π½Ρ ΡΠ°ΠΊΡ ΠΌΠΎΠ»ΠΎΡΠ½ΠΎΡ Π·Π°Π»ΠΎΠ·ΠΈ.
Background. The death rate from breast cancer in the past 10 years has increased steadily and has won first place in frequency among women. Despite advances in modern oncofarmakology, there is a heterogeneous tumor response to treatment between different patients. The objectives of our study were to evaluate the relationship between tumor response to systemic therapy and general and histological characteristics of patientβs tumors, including molecular subtypes of breast cancer, identify patterns between antropometric parameters of patients, comorbidities, and tumor response to the treatment; to study the effect of hematological, blood biochemical parameters on the results of the treatment of breast cancer. Methods. Molecular subtypes of breast cancer were established among 7521 patients, their changebility or stability in 67. Overall survival data was available for 491 patients with metastatic disease, peculiarities of development of metastases based on RECIST 1.1. criteria - 306. Retrospectively reviewed medical records of 110 patients with inoperable breast cancer (breast cancer) who received systemic therapy for the standard scheme. In the course of treatment were studied indicators such as: medical history of patients, life history, hematology, blood biochemistry, the results of primary and repeated histological and immunohistochemical studies of tumors, determination of molecular subtypes of breast cancer. Results. The distribution of the molecular subtypes of patients were as follows: A luminal - 69% luminal B - 9%, HER-2 / neu-positive - 7%, triple negative - 15%. Accounting factor Ki-67 (β₯14%) led to an increase in the frequency of luminal B subtype from 9% to 19% by reducing the luminal A. In 44.8% of patients it was noted a change of molecular subtypes. Targeted therapy (Herceptin) in these patients allowed to overcome unfavorable prognostic background - results in median survival from them (41,3Β±4,5 months) were higher than in the group without Herceptin (27,4Β±3,4 months) and higher than the HER-2 / neu-negative patients (38,1Β±3,0 months). The value of coefficient Spearman rank correlation to tumor response and the factor of menopause, age, general condition of the patient were - 0.174; -0.222; -0.250 (P <0.05), in accordance. The status of regional nodes N and tumor response have the correlation coefficient: - 0,265; (P <0.05), the status of the primary tumor T and metastases M - 0.107; and -0.071 (p> 0.05), in accordance. In the presence of neutropenia at 1 week after treatment it has been revealed significantly better tumor response to treatment - the correlation coefficient: 0.204 (p <0.05). Conclusion. Molecular subtypes detection had shown that HER-2/neu-positive and tripple negative breast cancer demonstrated the most aggresive course of disease. It was found that a more pronounced tumor response to combination chemotherapy can be expected in young patients, pre-menopausal, high ECOG status. The presence of neutropenia has a significantly positive impact on the results of treatment of patients with metastatic breast cancer.ΠΠ΅ΡΠΌΠΎΡΡΡ Π½Π° Π΄ΠΎΡΡΠΈΠΆΠ΅Π½ΠΈΡ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΉ ΠΎΠ½ΠΊΠΎΡΠ°ΡΠΌΠ°ΠΊΠΎΠ»ΠΎΠ³ΠΈΠΈ, Π² ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΏΡΠ°ΠΊΡΠΈΠΊΠ΅ ΠΎΡΠΌΠ΅ΡΠ°Π΅ΡΡΡ Π³Π΅ΡΠ΅ΡΠΎΠ³Π΅Π½Π½ΡΠΉ ΠΎΡΠ²Π΅Ρ ΠΎΠΏΡΡ
ΠΎΠ»ΠΈ Π½Π° Π»Π΅ΡΠ΅Π½ΠΈΠ΅ Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ², ΡΡΠΎ Π΄ΠΈΠΊΡΡΠ΅Ρ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΡ ΠΏΠ΅ΡΡΠΎΠ½ΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ Π»Π΅ΡΠ΅Π½ΠΈΡ. Π Π΄Π°Π½Π½ΠΎΠΌ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΈ Π±ΡΠ»ΠΎ ΠΈΠ·ΡΡΠ΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΡΠ°Π΄ΠΈΠΈ, Π°Π½Π°ΠΌΠ½Π΅Π·Π° Π±ΠΎΠ»Π΅Π·Π½ΠΈ, Π³ΠΈΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΎΠΏΡΡ
ΠΎΠ»Π΅Π²ΠΎΠ³ΠΎ ΠΏΡΠΎΡΠ΅ΡΡΠ°, ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΡΡ
ΠΏΠΎΠ΄ΡΠΈΠΏΠΎΠ² ΠΎΠΏΡΡ
ΠΎΠ»ΠΈ, Π°Π½ΡΡΠΎΠΏΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ², Π³Π΅ΠΌΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
, Π±ΠΈΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ ΠΊΡΠΎΠ²ΠΈ Π½Π° ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΏΠΎΠ»ΠΈΡ
ΠΈΠΌΠΈΠΎΡΠ΅ΡΠ°ΠΏΠΈΠΈ Π½Π΅ΠΎΠΏΠ΅ΡΠ°Π±Π΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ° ΠΌΠΎΠ»ΠΎΡΠ½ΠΎΠΉ ΠΆΠ΅Π»Π΅Π·Ρ, ΡΡΠΎ ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΏΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΈ Π·Π½Π°ΡΠΈΠΌΡΠΌ ΠΏΡΠΈ ΠΏΠΎΠ΄Π±ΠΎΡΠ΅ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΡ
ΡΡ
Π΅ΠΌ ΡΠΈΡΡΠ΅ΠΌΠ½ΠΎΠ³ΠΎ Π»Π΅ΡΠ΅Π½ΠΈΡ.ΠΠ΅Π·Π²Π°ΠΆΠ°ΡΡΠΈ Π½Π° Π΄ΠΎΡΡΠ³Π½Π΅Π½Π½Ρ ΡΡΡΠ°ΡΠ½ΠΎΡ ΠΎΠ½ΠΊΠΎΡΠ°ΡΠΌΠ°ΠΊΠΎΠ»ΠΎΠ³ΡΡ, Π² ΠΊΠ»ΡΠ½ΡΡΠ½ΡΠΉ ΠΏΡΠ°ΠΊΡΠΈΡΡ Π²ΡΠ΄Π·Π½Π°ΡΠ°ΡΡΡΡΡ Π³Π΅ΡΠ΅ΡΠΎΠ³Π΅Π½Π½Π° Π²ΡΠ΄ΠΏΠΎΠ²ΡΠ΄Ρ ΠΏΡΡ
Π»ΠΈΠ½ΠΈ Π½Π° Π»ΡΠΊΡΠ²Π°Π½Π½Ρ Ρ ΡΡΠ·Π½ΠΈΡ
ΠΏΠ°ΡΡΡΠ½ΡΡΠ². Π Π΄Π°Π½ΠΎΠΌΡ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ Π±ΡΠ»ΠΎ Π²ΠΈΠ²ΡΠ΅Π½ΠΎ Π²ΠΏΠ»ΠΈΠ² ΡΡΠ°Π΄ΡΡ, Π°Π½Π°ΠΌΠ½Π΅Π·Ρ Ρ
Π²ΠΎΡΠΎΠ±ΠΈ, Π³ΡΡΡΠΎΠ»ΠΎΠ³ΡΡΠ½ΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΏΡΡ
Π»ΠΈΠ½Π½ΠΎΠ³ΠΎ ΠΏΡΠΎΡΠ΅ΡΡ, ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΈΡ
ΠΏΡΠ΄ΡΠΈΠΏΡΠ² ΠΏΡΡ
Π»ΠΈΠ½ΠΈ, Π°Π½ΡΡΠΎΠΏΠΎΠΌΠ΅ΡΡΠΈΡΠ½ΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π½ΠΈΠΊΡΠ² ΠΏΠ°ΡΡΡΠ½ΡΡΠ², Π³Π΅ΠΌΠ°ΡΠΎΠ»ΠΎΠ³ΡΡΠ½ΠΈΡ
, Π±ΡΠΎΡ
ΡΠΌΡΡΠ½ΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π½ΠΈΠΊΡΠ² ΠΊΡΠΎΠ²Ρ Π½Π° ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ ΠΏΠΎΠ»ΡΡ
ΡΠΌΡΠΎΡΠ΅ΡΠ°ΠΏΡΡ Π½Π΅ΠΎΠΏΠ΅ΡΠ°Π±Π΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΡ ΠΌΠΎΠ»ΠΎΡΠ½ΠΎΡ Π·Π°Π»ΠΎΠ·ΠΈ, ΡΠΎ ΠΌΠ°Ρ Π²Π°ΠΆΠ»ΠΈΠ²Π΅ ΠΏΡΠ°ΠΊΡΠΈΡΠ½Π΅ Π·Π½Π°ΡΠ΅Π½Π½Ρ ΠΏΡΠΈ ΠΏΡΠ΄Π±ΠΎΡΡ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΈΡ
ΡΡ
Π΅ΠΌ ΡΠΈΡΡΠ΅ΠΌΠ½ΠΎΠ³ΠΎ Π»ΡΠΊΡΠ²Π°Π½Π½Ρ
Internet based cooperative teleoperation
Robotic operations carried out via the Internet face several challenges and difficulties. These range from human-computer interfacing and human-robot interaction to overcoming random time delay and task synchronization. These limitations are intensified when multi-operators at multi-sites are collaboratively tele-operating multi-robots to achieve a certain task. Such a system is presented here, modeled and analyzed. The two main characteristics of this system are Internet based real-time closed loop control and coordinated operation. Modeling and analysis is done using Petri Nets, which is a graphical and mathematical modeling tool with very attractive features. These feature are based on its ability to describe and study systems that are characterized as being concurrent, asynchronous, distributed, parallel, non-deterministic and/or stochastic. Thus, it is a very adequate and efficient tool for studying distributed robotic systems. Specifically, it will be used to show that despite random time delay the stability and synchronization of the system were achieved using event-based control.Link_to_subscribed_fulltex