Short-Term Steroid-Induced Central Serous Chorio-Retinopathy in a Patient with Laser Foveal Burn

2020 ◽  
Vol 37 (1) ◽  
Author(s):  
Nasir Ahmed Memon ◽  
Abdul Sami Memon ◽  
Israr Ahmed Bhutto ◽  
Pir Salim Mahar
Keyword(s):  
Key Words ◽  
Oral Intake ◽  
Green Laser ◽  
Fundus Examination ◽  
Laser Pointer ◽  
Short Term ◽  
Oral Steroids ◽  
Long Time

Oral intake of steroids has been associated with central serous chorio-retinopathy (CSCR) for long time. We report a 23 years old male who had exposure to green laser pointer after which he developed laser maculopathy. The treating ophthalmologist started oral steroids with patient developing CSCR in his left eye. He was referred to our retina clinic for further evaluation. On examination his vision was 6/6 Part in his right eye and 6/9 Part in his left eye. His dilated fundus examination revealed small foveal scar in his right eye and dull foveal reflex in his left eye. On OCT he had laser maculopathy in right eye and left fundus findings coincided with diagnosis of central serous chorio-retinopathy (CSCR). Patient was asked to discontinue his deltacortil tablets. The patient went back to his primary ophthalmologist who restarted deltacortil tablets. CSCR developed again. Key Words:  Maculopathy, burn, Steroids, Central Serous Chorio-retinopathy.

Time Window from Visual Images to Visual Short-Term Memory: Consolidation or Integration?

2004 ◽  
Vol 51 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Yuhong Jiang
Keyword(s):  
Short Term Memory ◽  
Time Window ◽  
Short Interval ◽  
Visual Images ◽  
Short Term ◽  
Temporal Window ◽  
Term Memory ◽  
Visual Short Term Memory ◽  
Probe Task ◽  
Long Time

Abstract. When two dot arrays are briefly presented, separated by a short interval of time, visual short-term memory of the first array is disrupted if the interval between arrays is shorter than 1300-1500 ms ( Brockmole, Wang, & Irwin, 2002 ). Here we investigated whether such a time window was triggered by the necessity to integrate arrays. Using a probe task we removed the need for integration but retained the requirement to represent the images. We found that a long time window was needed for performance to reach asymptote even when integration across images was not required. Furthermore, such window was lengthened if subjects had to remember the locations of the second array, but not if they only conducted a visual search among it. We suggest that a temporal window is required for consolidation of the first array, which is vulnerable to disruption by subsequent images that also need to be memorized.

scholarly journals Subway Gearbox Fault Diagnosis Algorithm Based on Adaptive Spline Impact Suppression

Entropy ◽  
2021 ◽  
Vol 23 (6) ◽  
pp. 660
Author(s):  
Zhongshuo Hu ◽  
Jianwei Yang ◽  
Dechen Yao ◽  
Jinhai Wang ◽  
Yongliang Bai
Keyword(s):  
Fault Diagnosis ◽  
Spline Interpolation ◽  
Reference Value ◽  
High Amplitude ◽  
Engineering Practice ◽  
Negative Effects ◽  
Short Term ◽  
Time Domain Signal ◽  
Gearbox Vibration ◽  
Long Time

In the signal processing of real subway vehicles, impacts between wheelsets and rail joint gaps have significant negative effects on the spectrum. This introduces great difficulties for the fault diagnosis of gearboxes. To solve this problem, this paper proposes an adaptive time-domain signal segmentation method that envelopes the original signal using a cubic spline interpolation. The peak values of the rail joint gap impacts are extracted to realize the adaptive segmentation of gearbox fault signals when the vehicle was moving at a uniform speed. A long-time and unsteady signal affected by wheel–rail impacts is segmented into multiple short-term, steady-state signals, which can suppress the high amplitude of the shock response signal. Finally, on this basis, multiple short-term sample signals are analyzed by time- and frequency-domain analyses and compared with the nonfaulty results. The results showed that the method can efficiently suppress the high-amplitude components of subway gearbox vibration signals and effectively extract the characteristics of weak faults due to uniform wear of the gearbox in the time and frequency domains. This provides reference value for the gearbox fault diagnosis in engineering practice.

scholarly journals Evaluation of a green laser pointer for flow cytometry

2007 ◽  
Vol 71A (10) ◽  
pp. 809-817 ◽  
Author(s):  
Robert C. Habbersett ◽  
Mark A. Naivar ◽  
Travis A. Woods ◽  
Gregory R. Goddard ◽  
Steven W. Graves
Keyword(s):  
Flow Cytometry ◽  
Green Laser ◽  
Laser Pointer

Motivation factors behind secession in the Arab states

2021 ◽  
Vol 28 ◽  
Keyword(s):  
Key Words ◽  
Ethnic Minorities ◽  
International Support ◽  
Motivation Factors ◽  
The Future ◽  
Long Time ◽  
Arab States ◽  
Political Economic

Some countries might witness movements that call for secession from the main homeland ,some had succeeded in their endeavors and others are hoping to accomplish them in the future .There are such movements in the Arab homeland which varied according to the motivations behind their wishes to disengage and the means that they used to accomplish them ,whether peaceful or by resort to violence ,which might take long time . These motives might be political, ethnical ,religious, or else . Usually there might be more than one motive behind such moves towards disengagement and secession, but the international support is the most conclusive factor in achieving such an aim , and this is what we are trying to discuss here. Key words : secession ,political, economic ,ethnic, minorities

I limiti del tempo in un tempo di limiti

2009 ◽  
pp. 55-62
Author(s):  
Fabrizio Rizzi
Keyword(s):  
Health System ◽  
Key Words ◽  
Community Service ◽  
National Health ◽  
National Health System ◽  
Short Term ◽  
Intellectual Honesty ◽  
Life Itself ◽  
Environmental Limits

- This article recounts the doubts and fears of an experienced analyst who is now an apprentice acrobat. He is forced to keep himself tiredly balanced between psychological and physical limits imposed by age, restrictions introduced by the National Health System and categories of patients who have precedence over others. He cannot receive all of the patients who ask for him and even those who he does receive will have to be discharged in the short term. Explaining to them, with intellectual honesty, that the community service has rules that limit his wishes as well. What can this be if not acrobatics? In the end it means combining the contradictory but perhaps also the most real aspects of life itself. [KEY WORDS: desires, personal and environmental limits, truth of the therapist]

scholarly journals Biodegradable Flame Retardants for Biodegradable Polymer

Biomolecules ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1038
Author(s):  
Muhammad Maqsood ◽  
Gunnar Seide
Keyword(s):  
Renewable Resources ◽  
Flame Retardants ◽  
Fire Risk ◽  
Polymeric Materials ◽  
Good Choice ◽  
Airborne Particle ◽  
Short Term ◽  
Renewable Materials ◽  
Long Time ◽  
Significant Attention

To improve sustainability of polymers and to reduce carbon footprint, polymers from renewable resources are given significant attention due to the developing concern over environmental protection. The renewable materials are progressively used in many technical applications instead of short-term-use products. However, among other applications, the flame retardancy of such polymers needs to be improved for technical applications due to potential fire risk and their involvement in our daily life. To overcome this potential risk, various flame retardants (FRs) compounds based on conventional and non-conventional approaches such as inorganic FRs, nitrogen-based FRs, halogenated FRs and nanofillers were synthesized. However, most of the conventional FRs are non-biodegradable and if disposed in the landfill, microorganisms in the soil or water cannot degrade them. Hence, they remain in the environment for long time and may find their way not only in the food chain but can also easily attach to any airborne particle and can travel distances and may end up in freshwater, food products, ecosystems, or even can be inhaled if they are present in the air. Furthermore, it is not a good choice to use non-biodegradable FRs in biodegradable polymers such as polylactic acid (PLA). Therefore, the goal of this review paper is to promote the use of biodegradable and bio-based compounds for flame retardants used in polymeric materials.

scholarly journals Methods of long-term and short-term adaptation for biometric image of keystroke dynamics

2021 ◽  
Vol 7 (3D) ◽  
pp. 450-457
Author(s):  
Dmitry V. Pashchenko ◽  
Dmitry A. Trokoz ◽  
Alexey I. Martyshkin ◽  
Elena A. Balzannikova
Keyword(s):  
Working Capacity ◽  
Keystroke Dynamics ◽  
Short Term ◽  
User Identification ◽  
New Device ◽  
Short Term Adaptation ◽  
Long Time

This article discusses one of the main problems of user identification by keyboard handwriting - short-term changes in the keystroke dynamics of users in connection with its psychophysical state, as well as changes over a long time associated with the formation of keystroke dynamics by a new user or when switching to a new device. A method for determining the phase of working capacity by the time characteristics of the keystroke dynamics is proposed.

scholarly journals Planting and harvesting innovation - an analysis of Samsung Electronics

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Seung Hoon Jang ◽  
Sang M. Lee ◽  
Taewan Kim ◽  
Donghyun Choi
Keyword(s):  
Early Stage ◽  
New Products ◽  
Limited Resources ◽  
High Tech ◽  
Short Term ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Time Period ◽  
Innovation Projects ◽  
Long Time

Abstract This study explores how firms manage the entire life cycle of innovation projects based on the framework of harvesting and planting innovation. While harvesting innovation seeks new products in the expectation of financial performance in the short term, planting innovation pursues creating value over a long time period. Without proper management of the process of planting and harvesting innovation, firms with limited resources may not be successful in launching innovative new products to seize a momentum in high tech industries. To examine this issue, the case of Samsung Electronics (SE), now an electronics giant originated from a former developing country, is analyzed. SE has shown to effectively utilize co-innovation to maintain numerous planting and harvesting innovation projects. Both researchers and practitioners would be interested in learning about how SE shared risks of innovation investment with external partners at the early stage of innovation cycles.

scholarly journals A green laser pointer hazard

2011 ◽  
Author(s):  
Jemellie Galang ◽  
Alessandro Restelli ◽  
Edward W. Hagley ◽  
Joshua Hadler ◽  
Charles W. Clark
Keyword(s):  
Green Laser ◽  
Laser Pointer

Simulation of Hydrogen Distribution due to In-Vessel Severe Accident in WWER-1000 NPP Containment: A Comparison of CONTAIN and MELCOR Codes Results

2018 ◽  
Author(s):  
Omid Noorikalkhoran ◽  
Massimiliano Gei
Keyword(s):  
Severe Accident ◽  
Second Step ◽  
Hydrogen Distribution ◽  
Short Term ◽  
Long Time ◽  
Design Basis Accident ◽  
Safety Features ◽  
Design Pressure ◽  
Good Agreement

During a severe accident or Beyond Design Basis Accident (BDBA), the reaction of water with zirconium alloy as fuel clad, radiolysis of water, molten corium-concrete interaction (MCCI) and post-accident corrosion can generate a source of hydrogen. In the present work, hydrogen distribution due to in-vessel reaction (between zircaloy and steam) has been simulated inside a WWER-1000 reactor containment. In the first step, the thermal hydraulic parameters of containment have been simulated for a DECL (Double Ended Cold Leg) accident (DBA phase) in both short and long time and the effects of spray as Engineering Safety Features (ESFs) on mitigating the parameters have been studied. In the second step, it has been assumed that the accident developed into an in-vessel core melting accident. While in pre-phase of core melting (severe accident phase), hydrogen will be produced as a result of zircaloy and steam reaction (BDBA phase), the hydrogen distribution has been simulated for 23 cells inside the reactor containment by using CONTAIN 2.0 (Best estimate code) and MELCOR 1.8.6 codes. Finally, the results have been compared to FSAR results. As it can be seen from the comparisons, both CONTAIN and MELCOR codes can predict the results in good agreement with FSAR (ANGAR code) results. CONTAIN shows peak pressure around 0.36 MPa in short-term and this amount is about 0.38 and 0.4 MPa for MELCOR and ANGAR (FSAR) results respectively. All these values are under design pressure that is around 0.46 MPa. Cell 20 has the maximum mole fraction of hydrogen in long-term about 9.5% while the maximum amount of hydrogen takes place in cell 22. The differences between the results of codes are because of different equations, Models, Numerical methods and assumptions that have been considered by the codes. The simulated Hydrogen Distribution Map (HDM) can be used for upgrading the location of HCAV systems and Hydrogen Mitigator features (like the recombiners and ignitors) inside the containment to reduce the risk of hydrogen explosion.

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