Analysis of Primary Position Validation in ECDIS System

2019 ◽  
pp. 5-16
Author(s):  
D. Šakan ◽  
S. Žuškin ◽  
D. Brčić ◽  
S. Valčić
Keyword(s):  
Primary Position

scholarly journals Impact of Actual Weather Datasets for Calibrating White-Box Building Energy Models Base on Monitored Data

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1187
Author(s):  
Vicente Gutiérrez González ◽  
Germán Ramos Ruiz ◽  
Carlos Fernández Bandera
Keyword(s):  
Control Experiment ◽  
Pearson Correlation ◽  
Building Energy ◽  
Third Party ◽  
Primary Position ◽  
Energy Models ◽  
Urgent Task ◽  
Calibration Study ◽  
Study Case ◽  
Reduce Energy Consumption

The need to reduce energy consumption in buildings is an urgent task. Increasing the use of calibrated building energy models (BEM) could accelerate this need. The calibration process of these models is a highly under-determined problem that normally yields multiple solutions. Among the uncertainties of calibration, the weather file has a primary position. The objective of this paper is to provide a methodology for selecting the optimal weather file when an on-site weather station with local sensors is available and what is the alternative option when it is not and a mathematically evaluation has to be done with sensors from nearby stations (third-party providers). We provide a quality assessment of models based on the Coefficient of Variation of the Root Mean Square Error (CV(RMSE)) and the Square Pearson Correlation Coefficient (R2). The research was developed on a control experiment conducted by Annex 58 and a previous calibration study. This is based on the results obtained with the study case based on the data provided by their N2 house.

scholarly journals Augmented superior rectus muscle transposition in management of defective ocular abduction

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Mohamed F. Farid ◽  
Ahmed E. M. Daifalla ◽  
Mohamed A. Awwad
Keyword(s):  
Nerve Palsy ◽  
Rectus Muscle ◽  
Muscle Transposition ◽  
Primary Position ◽  
Superior Rectus ◽  
Sixth Nerve Palsy ◽  
Abnormal Head ◽  
Duane Retraction Syndrome ◽  
Sixth Nerve ◽  
Superior Rectus Muscle

Abstract Background Superior rectus muscle transposition (SRT) is one of the proposed transposition techniques in the management of defective ocular abduction secondary to chronic sixth nerve palsy and esotropic Duane retraction syndrome (Eso-DRS). The aim of the current study is to report the outcomes of augmented SRT in treatment of Eso-DRS and chronic sixth nerve palsy. Methods a retrospective review of medical records of patients with Eso-DRS and complete chronic sixth nerve palsy who were treated by augmented full tendon SRT combined with medial rectus recession (MRc) when intraoperative forced duction test yielded a significant contracture. Effect on primary position esotropia (ET), abnormal head posture (AHP), limitation of ocular ductions as well as complications were reported and analyzed. Results a total of 21 patients were identified: 10 patients with 6th nerve palsy and 11 patients with Eso-DRS. In both groups, SRT was combined with ipsilateral MRc in 18 cases. ET, AHP and limited abduction were improved by means of 33.8PD, 26.5°, and 2.6 units in 6th nerve palsy group and by 31.1PD, 28.6°, and 2 units in Eso-DRS group respectively. Surgical success which was defined as within 10 PD of horizontal orthotropia and within 4 PD of vertical orthotropia was achieved in 15 cases (71.4%). Significant induced hypertropia of more than 4 PD was reported in 3 patients (30%) and in 2 patients (18%) in both groups, respectively. Conclusion augmented SRT with or without MRc is an effective tool for management of ET, AHP and limited abduction secondary to sixth nerve palsy and Eso-DRS. However, this form of augmented superior rectus muscle transposition could result in high rates of induced vertical deviation.

scholarly journals A Case Report of Primary Position Upbeat Nystagmus

1991 ◽  
Vol 1991 (Supplement48) ◽  
pp. 128-132
Author(s):  
Atsushi Sakuma ◽  
Isao Kato ◽  
Sadao Ogino ◽  
Tomoyuki Okada ◽  
Isamu Takeyama
Keyword(s):  
Case Report ◽  
Primary Position ◽  
Upbeat Nystagmus

Positioning Students with Cerebral Palsy to Use Augmentative and Alternative Communication

1990 ◽  
Vol 21 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Irene R. McEwen ◽  
Lyle L. Lloyd
Keyword(s):  
Cerebral Palsy ◽  
Augmentative And Alternative Communication ◽  
Communication Intervention ◽  
Alternative Communication ◽  
Primary Position ◽  
Communication Aid

Many students who use augmentative and alternative communication have severe forms of cerebral palsy which make it necessary to consider positioning as part of their communication intervention. This paper reviews the interrelated communication and positioning needs of these students, and then proposes the wheelchair as the primary position for use of a communication aid. Guidelines for good wheelchair positioning are presented.

scholarly journals THE LOCATION OF THE XANTHATE GROUPS IN PARTLY SUBSTITUTED CELLULOSE XANTHATES

1957 ◽  
Vol 35 (12) ◽  
pp. 1522-1533 ◽  
Author(s):  
E. P. Swan ◽  
C. B. Purves
Keyword(s):  
Cellulose Acetate ◽  
Chlorine Dioxide ◽  
Methyl Esters ◽  
Lead Tetraacetate ◽  
Degree Of Substitution ◽  
Hydroxyl Groups ◽  
Primary Position ◽  
Standard Methods ◽  
The Third ◽  
Almost All

Cellulose sodium xanthates of degree of substitution (D.S.) 0.4 to 0.66 were methylated to xanthate S-methyl esters which were then acetylated completely, the final xanthate D.S. remaining close to the original value. Dexanthation with aqueous chlorine dioxide near pH 4.5 and −5° removed almost all of the S-methyl xanthate groups, but the loss of a few acetyl groups from, and the retention of 1 to 2% of sulphur in, the resulting cellulose acetate could not be avoided. The original xanthate groups were presumably represented in this acetate as unsubstituted hydroxyl groups, and these were located by standard methods involving tosylation–iodination, tritylation, and oxidations with lead tetraacetate. Xanthate groups appeared to occupy the third and sixth, but not the second, position in the cellulose, and 53 to 61% of the substituent was in the sixth or primary position; one sample of viscose was "ripened" before the cellulose sodium xanthate was isolated, and the value was 81%. The results were of a preliminary nature, because severe technical difficulties reduced their reliability.

Comparative Study of the Usefulness of the Binocular Spot Vision Screener Autorefractor in the Detection of Childhood Visual Disorders

2018 ◽  
Vol 235 (04) ◽  
pp. 416-419 ◽  
Author(s):  
Nathalie Voide ◽  
Nicole Hoeckele ◽  
Pierre-François Kaeser
Keyword(s):  
Visual Acuity ◽  
Clinical Examination ◽  
Screening Tool ◽  
Ocular Motility ◽  
Primary Position ◽  
Visual Potential ◽  
Visual Acuity Loss ◽  
Eye Examination ◽  
Visual Screening ◽  
Vision Screener

Abstract Background The Spot Vision Screener (SVS) is designed to detect significant ametropia, anisometropia, and strabismus in non-dilated eyes. This study evaluates the efficacy of the SVS in paediatric visual screening. Patients and Methods All children screened during the paediatric visual screening day in Lausanne in 2016 were evaluated with the SVS, conventional monocular autorefractors, and clinical orthoptic examination. Recommendations for a further eye examination of the SVS were compared with those issued from traditional clinical screenings (monocular refraction and orthoptic examination). Results One hundred and sixty-eight consecutive children were included. The median age was 3.9 years. The SVS median spherical equivalent (SE) was + 0.25 D OU and it detected seven cases of (4.2%) anisometropia (SE difference ≥ 1 D). The conventional monocular autorefractor median SE was − 0.13 D OU and 20 cases of anisometropia (11.9%) were detected. Refraction could not be measured in 1.2% of patients with SVS versus 17.2% with monocular refractors. The SVS screened two manifest strabismus cases against five manifest and > 100 latent strabismus with orthoptic examination. As expected, the SVS was unable to assess reactions to monocular occlusion, visual acuity, and stereovision as well as to detect ocular motility disorders without strabismus in the primary position, and missed two cases of abnormal Brückner reflexes. Overall, the SVS identified 66 suspect patients (39.3%) against 102 (60.7%) after complete clinical examination. Conclusions The SVS can be a useful objective screening tool for non-ophthalmologists. However, because it fails to detect ocular motility troubles, organic visual acuity loss, or to assess the visual potential, it should only be used in association with a clinical examination, even in routine screening procedures.

scholarly journals Use of a Binocular Optical Coherence Tomography System to Evaluate Strabismus in Primary Position

2018 ◽  
Vol 136 (7) ◽  
pp. 811 ◽  
Author(s):  
Reena Chopra ◽  
Pádraig J. Mulholland ◽  
Vijay K. Tailor ◽  
Roger S. Anderson ◽  
Pearse A. Keane
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence ◽  
Primary Position ◽  
Optical Coherence Tomography System ◽  
Tomography System

scholarly journals Superior Oblique Myokymia Presumed Due to Large Posterior Fossa Arteriovenous Malformation

2020 ◽  
Vol 47 (6) ◽  
pp. 824-825
Author(s):  
Laura Donaldson ◽  
Brian van Adel ◽  
Amadeo R. Rodriguez
Keyword(s):  
High Frequency ◽  
Previous History ◽  
Ocular Motility ◽  
Slit Lamp ◽  
Primary Position ◽  
The Past ◽  
History Of ◽  
Supplementary Material ◽  
The Brain ◽  
Superior Oblique

A 26-year-old female presented with a complaint of intermittent oscillopsia and binocular vertical diplopia for the past 5 years. Over the past several months, she had noticed intermittent pulsatile tinnitus. She was otherwise healthy with no previous history of trauma and had no other visual or neurologic complaints. In Neuro-ophthalmology clinic, she was found to have 20/15 vision in both eyes with full ocular motility. There was a small exophoria in primary position and small esophoria in downgaze. Her slit lamp and fundus examinations were normal. During the assessment, the left eye was noted to undergo high-frequency, small amplitude incyclotorsional oscillations for a few seconds at a time (Video 1 in the supplementary material), which she was able to provoke by looking down. The diagnosis of superior oblique myokymia was made, and an MRI/MRA of the brain was requested.

Primary Position Upbeat Nystagmus in Man and Cats

2015 ◽  
pp. 190-194
Author(s):  
Koji Harada ◽  
Isao Kato ◽  
Yoshio Koike ◽  
Yo Kimura ◽  
Tadashi Nakamura ◽  
...  
Keyword(s):  
Primary Position ◽  
Upbeat Nystagmus
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