scholarly journals Comparison of Autorefraction, Cyclorefraction, and Subjective Manifest Refraction in Keratoconic Eyes

2021 ◽  
Author(s):  
Athar Zareei ◽  
Marziyeh Alamolhoda ◽  
Milad Abdolahian ◽  
Kiana Khatami ◽  
Shahram Bamdad
Keyword(s):  
Corneal Astigmatism ◽  
Q Value ◽  
Factors Associated ◽  
Starting Point ◽  
Manifest Refraction ◽  
Before And After ◽  
Multivariable Regression ◽  
The Difference ◽  
Cylindrical Axis ◽  
Significant Factors

Abstract Purpose: This study aimed to estimate the agreement of astigmatism between an autorefractor (Topcon), cycloplegic refraction, subjective manifest refraction, front and back corneal astigmatism. Moreover, this study aimed to investigate which factors influence the difference between cycloplegic refraction and subjective manifest refraction in these keratonic eyes.Methods: subjective manifest refraction, Autorefractmeter were measured in 64 keratonic eyes of 43 patients (21-45 years old) before and after using cycloplegic drop. We measured Corneal values by using Scheimpflug tomography. Astigmatic power was converted to vectors. The agreement of astigmatism between an autorefractor (Topcon), cycloplegic refraction, subjective manifest refraction, front and back corneal astigmatism was measured overall and in each vector. The difference between Cycloplegic refraction and subjective manifest refraction was calculated in each vector axis. Factors were anticipated associated with discrepancy by using Multivariable Regression Analysis.Results: The maximum estimations of agreement were found berween autorefratometer and subjective manifest refraction in cylindrical power(Icc:0.703,P<0.026), cylindrical axis(Icc:0.943,P<0.0001) and astigmatic vestors of J0 (Icc:0.972,P<0.0001) and J45( Icc:827,P=0.006). The significant factors Associated With discrepancy between cyclorefraction and subjective manifest refraction in both vectors(J0 and J45) were Q-value(B Coefficient= -4.91, P<0.0001) (B Coefficient=1.01, P<0.0001), corneal astigmatism(B Coefficient= 0.66, P=0.001) (B Coefficient=0.11, P=0.001), Kmax(B Coefficient= -0.52, P<0.0001) (B Coefficient=0.07, P=0.02), IHA(B Coefficient=0.04, P=0.005) (B Coefficient= -0.03, P<0.0001). The significant associated factors for axis changes between cycloplegic refraction and subjective manifest refraction were cone location (B Coefficient= -33.34, P=0.001) and corneal astigmatism(B Coefficient= -0.1, P=0.04).Conclusion: Maximum agreement of subjective manifest refraction astigmatism is with auto refractometer in keratoconus patients, so it could be said that the result of the auto refractometer is the most appropriate starting point during subjective refraction in these patients. It can be predicted that the closer the keratoconus cone location relative to the center of the cornea and the lower the keratoconus patient's corneal astigmatism, the more the probability of axis changes by cycloplegic drop.

A Tool for Discourse Analysis and Visualization

2013 ◽  
Vol 5 (2) ◽  
pp. 55-71 ◽  
Author(s):  
Costin-Gabriel Chiru ◽  
Stefan Trausan-Matu
Keyword(s):  
Discourse Analysis ◽  
Intrinsic Structure ◽  
Fine Grained ◽  
Construction Of Knowledge ◽  
Cultural Paradigms ◽  
Starting Point ◽  
Social Construction Of Knowledge ◽  
Before And After ◽  
The Difference ◽  
Polyphonic Model

In this paper the authors present a system that combines the cognitive and socio-cultural paradigms in the field of discourse analysis in order to analyze both texts written by only one author (for example narrations) and those written collaboratively (chat conversations, blogs, wikis, forums). The novelty of their approach is that the majority of the existing applications are oriented on analyzing only one of these two types, an adaptation being necessary for the analysis of the other type. Another advantage of the presented system is that since it is centered on a dialogistic polyphonic model considering topics as inter-animated voices, it could show the difference between coarse- and fine-grained coherence in discourse, therefore allowing the analysis of a text from two different viewpoints: a) its intrinsic structure and cohesion and b) how well this text fits in a stream of texts (whether it is or not cohesive with the texts before and after it). The dialogistic polyphonic model was used as a starting point for a method for analyzing collaboration and social construction of knowledge in groups and communities using textual interactions, and for several implemented systems for providing computerized support to the analysis method through visualizations and feedback generation.

scholarly journals Factors associated with single-family home survival in the 2018 Camp Fire, California

2021 ◽  
Author(s):  
Eric Knapp ◽  
Yana S Valachovic ◽  
Stephen L Quarles ◽  
Nels G Johnson
Keyword(s):  
Canopy Cover ◽  
Radiant Heat ◽  
Building Code ◽  
Fire Damage ◽  
Single Family ◽  
Construction Time ◽  
Factors Associated ◽  
Survival Percentage ◽  
Before And After ◽  
The Difference

Abstract Background The 2018 Camp Fire, which destroyed 18,804 structures in northern California, including most of the town of Paradise, provided an opportunity to investigate vegetation and housing factors associated with home loss and determine whether California's 2008 adoption of exterior building codes for homes in the wildland-urban-interface (WUI) improved survival. We randomly sampled single-family homes constructed: before 1997, 1997 to 2007, and 2008 to 2018, the latter two time periods being before and after changes to the building code. We then quantified the nearby overstory canopy cover and the distance to the nearest destroyed home and structure from aerial imagery. Using post-fire photographs, we also assessed fire damage and assigned a cause for damaged but not destroyed homes. Results Homes built prior to 1997 fared poorly, with only 11.5% surviving, compared with 38.5% survival for homes built in 1997 and after. The difference in survival percentage for homes built immediately before and after the adoption of Chap. 7A in the California Building Code (37% and 44%, respectively), was not statistically significant. Distance to nearest destroyed structure, number of structures destroyed within 100 m, and overstory canopy cover within 100 m of the home were the strongest predictors of survival, but significant interactions with the construction time period suggested that factors contributing to survival differed for homes of different ages. Homes > 18 from a destroyed structure and in areas with overstory canopy cover within 30–100 m of the home of < 53% survived at a substantially higher rate. Most fire damage to surviving homes resulted from radiant heat from nearby burning structures or flame impingement from ignition of near-home combustible materials. Conclusions Strong associations between distance to nearest destroyed structure and vegetation within 100 m and home survival in the Camp Fire indicates building and vegetation modifications are possible that would substantially improve outcomes. Among those include improvements to windows and siding in closest proximity to neighboring structures, treatment of wildland fuels, and eliminating near-home combustibles, especially in areas closest to the home (0-1.5 m).

Tem analysis of multiple-energy arsenic implanted and Rta'd silicon

1987 ◽  
Vol 45 ◽  
pp. 246-247
Author(s):  
R.A. Herring
Keyword(s):  
Device Fabrication ◽  
High Concentration ◽  
Tem Analysis ◽  
Defect Clusters ◽  
High Fluences ◽  
Small Defect ◽  
Before And After ◽  
The Matrix ◽  
The Difference ◽  
Factor Type

Rapid thermal annealing (RTA) of ion-implanted Si is important for device fabrication. The defect structures of 2.5, 4.0, and 6.0 MeV As-implanted silicon irradiated to fluences of 2E14, 4E14, and 6E14, respectively, have been analyzed by electron diffraction both before and after RTA at 1100°C for 10 seconds. At such high fluences and energies the implanted As ions change the Si from crystalline to amorphous. Three distinct amorphous regions emerge due to the three implantation energies used (Fig. 1). The amorphous regions are separated from each other by crystalline Si (marked L1, L2, and L3 in Fig. 1) which contains a high concentration of small defect clusters. The small defect clusters were similar to what had been determined earlier as being amorphous zones since their contrast was principally of the structure-factor type that arises due to the difference in extinction distance between the matrix and damage regions.

Changes in Platelet Aggregability after Ovariectomy

1979 ◽  
Vol 42 (04) ◽  
pp. 1332-1339 ◽  
Author(s):  
Hiroh Yamazaki ◽  
Takeshi Motomiya ◽  
Minoru Sonoda ◽  
Noboru Miyagawa
Keyword(s):  
Platelet Count ◽  
Platelet Activation ◽  
Ovarian Hormones ◽  
Control Group ◽  
Platelet Aggregability ◽  
Appearance Rate ◽  
Before And After ◽  
The Difference ◽  
Induced Aggregation ◽  
Observation Period

SummaryChanges in platelets in 48 patients with uterine myoma before and after hysterectomy with and without ovariectomy were examined. Bilateral ovariectomy in 25 cases (ovariec-tomized group) and unilateral or non-ovariectomy in 23 cases (control group) were performed at the hysterectomy. Platelet count and an appearance rate of secondary aggregation decreased at one day after and increased at one week after the operation, similarly in both the ovariectomized and the control group. The appearance rate of secondary aggregation was reflected in an intensity of aggregation at 5 min after the addition of reagent to PRP. At one month after the operation, the appearance rate of secondary aggregation induced by 3 μM ADP showed a statistically significant decrease in comparison with the preoperation value (P <0.05) and the enhancement of 5-min aggregation was still observed in the control group, while ceased in the ovariectomized group. The difference between the two groups was significant (P < 0.05). There was almost no change in the speed and intensity of primary and secondary aggregation during the observation period. No significant differences in collagen-induced aggregation were noted between the two groups. The results suggest that ovarian hormones, mainly estrogen, facilitate platelet activation which is mediated by the so-called secondary aggregation.

PENGARUH TERAPI TERTAWA TERHADAP PENURUNAN TEKANAN DARAH LANSIA DI UPT PANTI WREDHA BUDHI DHARMA YOGYAKARTA

2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Niken Setyaningrum ◽  
Andri Setyorini ◽  
Fachruddin Tri Fitrianta
Keyword(s):  
Blood Pressure ◽  
Data Analysis ◽  
The Elderly ◽  
Control Group ◽  
Group Comparison ◽  
Control Blood Pressure ◽  
Men And Women ◽  
Treatment Of Hypertension ◽  
Before And After ◽  
The Difference

ABSTRACTBackground: Hypertension is one of the most common diseases, because this disease is suffered byboth men and women, as well as adults and young people. Treatment of hypertension does not onlyrely on medications from the doctor or regulate diet alone, but it is also important to make our bodyalways relaxed. Laughter can help to control blood pressure by reducing endocrine stress andcreating a relaxed condition to deal with relaxation.Objective: The general objective of the study was to determine the effect of laughter therapy ondecreasing elderly blood pressure in UPT Panti Wredha Budhi Dharma Yogyakarta.Methods: The design used in this study is a pre-experimental design study with one group pre-posttestresearch design where there is no control group (comparison). The population in this study wereelderly aged over> 60 years at 55 UPT Panti Wredha Budhi Dharma Yogyakarta. The method oftaking in this study uses total sampling. The sample in this study were 55 elderly. Data analysis wasused to determine the difference in blood pressure before and after laughing therapy with a ratio datascale that was using Pairs T-TestResult: There is an effect of laughing therapy on blood pressure in the elderly at UPT Panti WredhaBudhi Dharma Yogyakarta marked with a significant value of 0.000 (P <0.05)

Klein with Lacan: A Study on the Reception of Lacanian Ideas in Uruguay and Its Effects on Clinical Practices (1955–82)

2020 ◽  
Vol 22 (3) ◽  
pp. 341-361
Author(s):  
Gonzalo Grau-Pérez ◽  
J. Guillermo Milán
Keyword(s):  
Clinical Practice ◽  
Clinical Material ◽  
Clinical Practices ◽  
Before And After ◽  
The Difference ◽  
The 1960S ◽  
The Relationship ◽  
Discursive Approach ◽  
The Way ◽  
Clinical Cases

In Uruguay, Lacanian ideas arrived in the 1960s, into a context of Kleinian hegemony. Adopting a discursive approach, this study researched the initial reception of these ideas and its effects on clinical practices. We gathered a corpus of discursive data from clinical cases and theoretical-doctrinal articles (from the 1960s, 1970s and 1980s). In order to examine the effects of Lacanian ideas, we analysed the difference in the way of interpreting the clinical material before and after Lacan's reception. The results of this research illuminate some epistemological problems of psychoanalysis, especially the relationship between theory and clinical practice.

FRACTIONAL DETERMINATIONS OF URINARY 17-KETOSTEROIDS IN HYPEREMESIS GRAVIDARUM

1962 ◽  
Vol 41 (1) ◽  
pp. 123-128 ◽  
Author(s):  
Pentti A. Järvinen ◽  
Sykkö Pesonen ◽  
Pirkko Väänänen
Keyword(s):  
Hyperemesis Gravidarum ◽  
First Trimester ◽  
Control Group ◽  
Before And After ◽  
Daily Urine ◽  
First Trimester Of Pregnancy ◽  
The Difference

ABSTRACT The fractional determination of 17-ketosteroids in the daily urine was performed in nine cases of hyperemesis gravidarum and in four control cases, in the first trimester of pregnancy both before and after corticotrophin administration. The excretion of total 17-KS is similar in the two groups. Only in the hyperemesis group does the excretion of total 17-KS increase significantly after corticotrophin administration. The fractional determination reveals no difference between the two groups of patients with regard to the values of the fractions U (unidentified 17-KS), A (androsterone) and Rest (11-oxygenated 17-KS). The excretion of dehydroepiandrosterone is significantly higher in the hyperemesis group than in the control group. The excretion of androstanolone seems to be lower in the hyperemesis group than in the control group, but the difference is not statistically significant. The differences in the correlation between dehydroepiandrosterone and androstanolone in the two groups is significant. The high excretion of dehydroepiandrosterone and low excretion of androstanolone in cases of hyperemesis gravidarum is a sign of adrenal dysfunction.

Automatic Tread Gaging Machine

1979 ◽  
Vol 7 (1) ◽  
pp. 31-39
Author(s):  
G. S. Ludwig ◽  
F. C. Brenner
Keyword(s):  
Experimental Tests ◽  
Automatic Machine ◽  
Wear Rates ◽  
Handling Device ◽  
Straight Line ◽  
Component Systems ◽  
Before And After ◽  
Good Repeatability ◽  
The Difference ◽  
Straight Lines

Abstract An automatic tread gaging machine has been developed. It consists of three component systems: (1) a laser gaging head, (2) a tire handling device, and (3) a computer that controls the movement of the tire handling machine, processes the data, and computes the least-squares straight line from which a wear rate may be estimated. Experimental tests show that the machine has good repeatability. In comparisons with measurements obtained by a hand gage, the automatic machine gives smaller average groove depths. The difference before and after a period of wear for both methods of measurement are the same. Wear rates estimated from the slopes of straight lines fitted to both sets of data are not significantly different.

The Degree of Subjective Complaints of Students Practice in Mechanical Technology Laboratories

2018 ◽  
Vol 4 (1) ◽  
pp. 22
Author(s):  
I Ketut Widana
Keyword(s):  
Engineering Students ◽  
Standing Position ◽  
Statistical Test ◽  
Rank Test ◽  
Cross Sectional ◽  
Signed Rank ◽  
Before And After ◽  
Signed Rank Test ◽  
The Difference ◽  
Paired T Test

The working practice of the engineering students is part of the learning process that is irreducible and indispensable. The composition of  lecturing between theoretical and practical one is 40% to 60%. With this condition, the students spend more time at the laboratory. Generally, the students perform in the laboratory work by standing position. The design of research is observational cross-sectional. The method applied is observation, interview and measuring. The subjects of research are practicing students amounting to 21 students. Referring to the analysis of statistical test or Wilcoxon signed ranks test, the difference of effect of work position is significant, namely p < 0.05 towards musculoskeletal disorders (MSDs) before and after working. The quantity of the average complaint after working is score 44.62 ± 9.47. The result of Wilcoxon signed rank test shows that there is significant different effects of standing work position, namely p < 0.05 towards fatigue generally before and after working. The degree of the working pulse is on the average of 110.78  ± 17.80 bpm (beats per minutes) which can be categorized into the medium workload. Using paired t-test, the result is p < 0.05.

Photolytic and thermal annealing of radical anions gamma-irradiated monocarboxylic acids

1979 ◽  
Vol 44 (12) ◽  
pp. 3632-3643 ◽  
Author(s):  
Karel Mach ◽  
Igor Janovský ◽  
Karel Vacek
Keyword(s):  
Thermal Annealing ◽  
Pivalic Acid ◽  
Esr Spectra ◽  
Paramagnetic Species ◽  
Radical Anions ◽  
Γ Irradiation ◽  
Before And After ◽  
Optical Bleaching ◽  
The Difference ◽  
Gamma Irradiated

Total yields of paramagnetic species, their optical bleaching and thermal annealing in acetic, propionic, a-butyric, isobutyric, and pivalic acid γ-irradiated at 77 K were followed by ESR spectroscopy. Radical anions, always found after irradiation, disappear during optical bleaching without formation of any paramagnetic product. During thermal annealing they are converted almost quantitatively into the α-radicals of the respective acid, with the exception of pivalic acid. Amounts of radical anions were estimated from the difference of integrated ESR spectra taken before and after optical bleaching. The results show that approximately equal amounts of the reduction and oxidation paramagnetic products of the γ-irradiation can be detected.

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