scholarly journals Embryological development of the human cranio-facial arterial system: a pictorial review

2021 ◽  
Author(s):  
Lorenzo Bertulli ◽  
Thomas Robert
Keyword(s):  
Comparative Anatomy ◽  
Arterial System ◽  
Human Embryos ◽  
Developmental Phase ◽  
Embryological Development ◽  
System A ◽  
Pictorial Review ◽  
Vascular Structures ◽  
Almost All ◽  
Neurovascular Conflicts

AbstractThe embryological development of the cerebral vasculature is very complex. Historical and also more recent studies based on human embryos, comparative anatomy and cerebral angiographies allowed us to better understand this vasculature development. The knowledge and understanding of such embryological development are important for physicians interested in neurovascular pathologies. Indeed, all vascular variants and almost all vascular pathologies, such as aneurysms, dolichoectasia, atherosclerosis, and neurovascular conflicts could be explained by an alteration during the embryological life. There are also many variants of these vascular structures present in normal developed adults, which are variably associated with pathological entities. Understanding the process which leads to the development of the normal cerebral arterial system in humans is, therefore, very important to have a better knowledge of the possible clinical and surgical implications of these anomalies. In this paper, we review the embryological development of the cranio-facial arterial vasculature from its beginning at approximately days 21–50 of intrauterine life, with pictures illustrating each developmental phase.

scholarly journals Measurement of Gem Colour Using a Computer Vision System: A Case Study with Jadeite-Jade

Minerals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 791
Author(s):  
Sufei Zhang ◽  
Ying Guo
Keyword(s):  
Computer Vision ◽  
Regression Model ◽  
Vision System ◽  
Expert Group ◽  
Group Test ◽  
System A ◽  
Real Objects ◽  
Practical Tool ◽  
Almost All

This paper introduces computer vision systems (CVSs), which provides a new method to measure gem colour, and compares CVS and colourimeter (CM) measurements of jadeite-jade colour in the CIELAB space. The feasibility of using CVS for jadeite-jade colour measurement was verified by an expert group test and a reasonable regression model in an experiment involving 111 samples covering almost all jadeite-jade colours. In the expert group test, more than 93.33% of CVS images are considered to have high similarities with real objects. Comparing L*, a*, b*, C*, h, and ∆E* (greater than 10) from CVS and CM tests indicate that significant visual differences exist between the measured colours. For a*, b*, and h, the R2 of the regression model for CVS and CM was 90.2% or more. CVS readings can be used to predict the colour value measured by CM, which means that CVS technology can become a practical tool to detect the colour of jadeite-jade.

Anatomic variants of the subscapular-thoracodorsal arterial system: A radiologic analysis of 200 arterial systems

Oral Oncology ◽  
2022 ◽  
Vol 125 ◽  
pp. 105682
Author(s):  
Thomas F Barrett ◽  
Hilary Orlowski ◽  
Jason Rich ◽  
Ryan S Jackson ◽  
Patrik Pipkorn ◽  
...  
Keyword(s):  
Arterial System ◽  
System A ◽  
Anatomic Variants

scholarly journals Otoritas dan Gerakan Keagamaan Daengguru: Studi Sejarah Islamisasi di Sulawesi Selatan

2020 ◽  
Vol 11 (2) ◽  
pp. 67-91
Author(s):  
Mustari Bosra
Keyword(s):  
Social System ◽  
Islamic Law ◽  
Social Institution ◽  
Integration Pattern ◽  
System A ◽  
South Sulawesi ◽  
The Social ◽  
Almost All ◽  
The Village ◽  
Central Level

This paper is about the Islamization movement of the kingdoms in South Sulawesi, sointegrated sara 'is into a social institution called pangadereng (Bugis) angadakkang (Makassar). To ensure the upholding of Islamic law, which has been integrated into the social system, a religious bureaucracy (Islam) known aswas formed sara '. The royal bureaucratic officials who handle this institution, from the central level to the village or village level are called parewa sara ', which in this study uses the term daengguru. This integration pattern was developed in almost all Islamic kingdoms in South Sulawesi. Adat has its own field and sharia controls its own field. One another should not disturb each other. When the King of Bone La Maddarremmeng was about to confront Islam and customs, he was opposed by all parties. When Arung Matowa Wajo declared a strong Islamization, he was also evicted from his position.

Brain Tumor Reporting and Data System: A Pictorial Review

Neurographics ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 175-185
Author(s):  
B. Rao ◽  
I. Ikuta ◽  
A. Mahajan ◽  
A.A. Karam ◽  
V.M. Zohrabian
Keyword(s):  
Brain Tumor ◽  
Brain Tumors ◽  
Response To Therapy ◽  
Data System ◽  
Imaging Features ◽  
New Paradigm ◽  
Advantages And Disadvantages ◽  
Pictorial Review ◽  
Almost All ◽  
The Brain

Brain tumors are a diverse group of neoplasms that are a source of substantial morbidity and mortality worldwide. Primary gliomas constitute almost all malignant brain tumors, with the most aggressive as well as most common form in adults, grade IV glioma or glioblastoma multiforme, carrying an especially poor prognosis. Neuroimaging is critical not only in the identification of CNS tumor but also in treatment-planning and assessing the response to therapy. Structured reporting continues to gain traction in radiology by reducing report ambiguity and improving consistency, while keeping referring clinicians and patients informed. The Brain Tumor Reporting and Data System (BT-RADS) is a relatively new paradigm that attempts to simplify and maximize consistency in radiologic reporting. BT-RADS incorporates MR imaging features, clinical assessment, and timing of therapy to assign each study a score or category, which is, in turn, linked to a management suggestion. The purpose of this pictorial review article is to familiarize radiologists and nonradiology neurologic specialists alike with BT-RADS, highlighting both advantages and limitations, in the hope that adoption of this system might ultimately facilitate more effective communication and improve consistency among reports.Learning Objective: To describe the features and underscore the advantages and disadvantages of the Brain Tumor Reporting and Data System (BT-RADS), a relatively new classification system that attempts to simplify and maximize consistency in radiologic reporting

Evolutionary developmental biology

2018 ◽  
Author(s):  
Ron Amundson
Keyword(s):  
Developmental Biology ◽  
Evolutionary Developmental Biology ◽  
Developmental Genetics ◽  
Comparative Biology ◽  
Embryological Development ◽  
Adult Form ◽  
The Core ◽  
Almost All ◽  
Evo Devo ◽  
Year 2000

Evolutionary developmental biology is the study of evolutionary change (called phylogeny) as it is revealed through the embryological development of individual organisms (called ontogeny). On this approach, the understanding of ontogeny contributes to our understanding of phylogeny, and vice versa. Evolutionary thinkers of the nineteenth century almost all held what may be called the core doctrine of evolutionary developmental biology: that in order to achieve a modification in the adult form, evolution must modify the embryological processes responsible for that form, so that an understanding of evolution requires an understanding of development. Evolutionary theory has no theoretical need for developmental views of evolution. Beginning around 1990 a series of discoveries and theoretical innovations in developmental genetics led to the reinvigoration of developmental approaches to evolution. Evolutionary developmental biology (‘evo-devo’ as it is now called) was inaugurated as a Division of the Society for Integrative and Comparative Biology in the year 2000.

scholarly journals Competence in using the arthroscopy stack system: a national survey of orthopaedic trainees in the UK

2020 ◽  
Vol 102 (2) ◽  
pp. 149-152
Author(s):  
G Manoharan ◽  
N Sharma ◽  
P Gallacher
Keyword(s):  
Patient Safety ◽  
Training Programme ◽  
Electronic Survey ◽  
System A ◽  
Ensure Patient Safety ◽  
Set Up ◽  
Orthopaedic Training ◽  
The Uk ◽  
Almost All ◽  
Arthroscopic Procedures

Introduction Surgeons are required to have a sound knowledge regarding all operating theatre equipment they wish to use. This is important to ensure patient safety and theatre efficiency. Arthroscopy forms a significant part of all orthopaedic subspecialty practice. Proficiency in performing arthroscopic procedures is assessed during registrar training. The aim of this survey was to determine the competence of orthopaedic trainee registrars in setting up the arthroscopy stack system and managing intraoperative problems. Materials and methods Electronic survey forms were sent to all orthopaedic training programme directors in the UK to be forwarded to trainees in their deanery. The electronic survey contained 13 questions aimed at determining trainee experience and competence level with working with the arthroscopy stack system. Results A total of 138 responses were received from 14 deaneries in the UK. Almost all registrars had experienced intraoperative delays because of equipment malfunction that required addressing by more competent staff. However, 82% of respondents had not received any formal training for operating the arthroscopy stack system. Some 82% of registrars of ST7 grade or above, who had performed over 50 arthroscopic procedures and achieved a level 4 PBA competence, were unable to set up the stack system and successfully address these delays. Conclusions Inadequate training is delivered to orthopaedic registrars from both the training programme and arthroscopy-themed courses with regards to set-up and operation of the arthroscopy tower system. This training should be part of the curriculum to ensure patient safety and efficient theatre practice.

scholarly journals Blood Flow in Human Arterial System-A Review

2016 ◽  
Vol 24 ◽  
pp. 339-346 ◽  
Author(s):  
Blessy Thomas ◽  
K.S. Sumam
Keyword(s):  
Blood Flow ◽  
Arterial System ◽  
System A

Response to osmotic stimuli in mesangial cells: role of system A transporter

1994 ◽  
Vol 267 (5) ◽  
pp. C1493-C1500 ◽  
Author(s):  
A. Yamauchi ◽  
A. Miyai ◽  
K. Yokoyama ◽  
T. Itoh ◽  
T. Kamada ◽  
...  
Keyword(s):  
Amino Acids ◽  
Mesangial Cells ◽  
Isobutyric Acid ◽  
Maximal Velocity ◽  
Transport Activity ◽  
Hypertonic Medium ◽  
Neutral Amino Acids ◽  
System A ◽  
Almost All

It has been suggested that mesangial cells have an osmoregulatory mechanism like that of renal medullary cells, such as intracellular accumulation of polyols in response to hypertonicity. We examined osmoregulatory role of neutral amino acids transported by system A in cultured mesangial cells. The contents of almost all amino acids increased under hypertonic conditions to more than twice the value in isotonic cells. In hypertonic cells, the system A transport activity, measured by Na(+)-dependent 2-(methylamino)isobutyric acid (MeAIB) uptake, was 3.8-fold the uptake in isotonic cells, reaching a maximum 16 h after the switch to hypertonic medium. The response to hypertonicity was the result of an increase in maximal velocity without change in Michaelis constant and was dependent on RNA and protein synthesis. When medium osmolality decreased from hypertonic to isotonic, MeAIB uptake reverted to the isotonic level within 16 h and a large transient efflux of L-proline occurred within 10 min. These results suggest that mesangial cells respond to extracellular hypertonicity by increasing system A transport activity and neutral amino acids can function as compatible osmolytes in mesangial cells.

scholarly journals Is It Possible to Develop Electromobility in Urban Passenger Shipping in Post-Communist Countries? Evidence from Gdańsk, Poland

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6362
Author(s):  
Marcin Połom ◽  
Maciej Tarkowski ◽  
Krystian Puzdrakiewicz ◽  
Łukasz Dopierała
Keyword(s):  
Electric Vehicles ◽  
Fossil Fuels ◽  
New Paradigm ◽  
Electric Cars ◽  
Environmental Consequences ◽  
System A ◽  
Technical Issues ◽  
Almost All ◽  
Communist Countries ◽  
The City

Reducing emissions of pollutants from transport is clearly one of the main challenges of the constantly developing world. Because the environmental impact of different means of transport is significant, it is necessary to cut down on fossil fuels and turn to more eco-friendly solutions, e.g., electric vehicles. Almost all European countries are now adapting their transport policies to this new paradigm. Nonetheless, due to large economic disparities, these processes are currently at different levels of implementation in Western and Eastern Europe. The main focus is on private electric cars and more traditional means of transport, rather than water trams. This article presents possible means of developing water tram lines in Gdańsk served by hybrid or full-electric vehicles. The analysis presented herein reflects the multidimensional nature of the issue. The article provides data on the socio-economic situation in the city, technical issues related to the implementation of such tram lines, and the possible consequences of introducing a new means of transportation into the existing system. A key part of the analysis is the identification of anticipated economic and environmental consequences of introducing both hybrid and full-electric vehicles into the system. A comprehensive socio-economic and technical-environmental analysis of the possibilities of developing urban electromobility in the form of urban passenger shipping in post-communist countries, such as that presented in this paper, has not been previously published.

Required Data Collection Times for Steady and Quasi-steady Experiments

2017 ◽  
Author(s):  
Robert F. Roddy ◽  
David E. Hess
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
Frequency Noise ◽  
Surface Ship ◽  
System A ◽  
Low Pass ◽  
Collection Period ◽  
Almost All ◽  
Low Pass Filters

One of the requirements in performing steady or quasi-steady experiments is the determination of adequate collection times so that the data will not be biased due to low frequency energy in the data stream. Since virtually all steady experiments run at DTMB have low pass filters in line with the signal conditioning, high frequency noise is not a consideration in determining the required collection times. At both EMB and DTMB almost all of the surface ship drag measurements were made using gravity type balances until about 1970. These balances used both springs and dampers to modify the natural frequency of the system so that a good average model drag could be determined in a 5-6 sec collection period. Submarine model experiments began using block gages to measure drag beginning in the late 1950's. For these experiments crude methods were used to damp the output data but, to the author’s knowledge, no methods were ever put into place that was analogous to the springs and damper system. A method for determining the required collection times for any steady or quasi-steady experiment is presented along with sample cases showing the necessity for, and the utility of, using such a method.

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