scholarly journals Evaluating the Accuracy of Remote Dendrometers in Tree Diameter Measurements at Breast Height

2021 ◽  
Vol 43 (1) ◽  
Author(s):  
Zennure Ucar ◽  
Ahmet Salih Değermenci ◽  
Hayati Zengin ◽  
Pete Bettinger
Keyword(s):  
Positive Development ◽  
Smartphone App ◽  
Mean Deviation ◽  
Forest Types ◽  
Tree Diameter ◽  
Significant Difference ◽  
Remote Measurements ◽  
The Mean ◽  
Reference Measurements ◽  
Post Hoc

An accurate tree diameter (DBH) measurement is a significant component of forest inventory. This study assessed the reliability of remote dendrometers to measure tree DBH. We compared direct caliper measurements (reference measurements) to the remote measurements collected from a laser caliper and a smartphone at 0.5 m, 1 m, and 1.5 m distances from each tree within three forest types (pine, oak, and poplar forests). In general, all remote dendrometers underestimated the mean diameter compared to direct caliper measurements, regardless of forest types and distances. We observed that the mean deviation of direct caliper measurement and smartphone measurement at 1.5 m within a pine forest and oak forest were the lowest (0.3 cm and 0.36 cm, respectively). The deviations between direct caliper measurements and smartphone measurements at a 0.5 m distance, across forest types, were noticeably larger compared to others. An ANOVA test was used to determine whether significant deviations existed between caliper measurements and remote measurements at a specific distance, and among three different forest types. We rejected the null hypothesis, which suggested that there were no statistically significant differences (p<0.05) between tree DBH measurements obtained from the direct caliper measurements and indirect measurements (smartphone and laser caliper) captured at a distance. Then, a post-hoc test was performed to examine which set of estimated deviations was different from the reference data. The results suggested that indirect tree DBH measurements using the smartphone app at 1 m and 1.5 m in certain forest types (pine and oak) were not significantly different from direct tree DBH measurements. Also, our test results mostly indicated no significant difference within each forest, except for measurements using the smartphone app at 0.5 m across all forest types when the smartphone measurements were compared to laser caliper measurements. Although forest characteristics and measurement distance may play an important role in remote tree DBH measurement accuracy, the smartphone app may be used as a practical alternative to direct measurement in measuring the DBH of a tree, which may be a positive development for forestry due to the increased use of smartphones and the availability of a free measure app.

scholarly journals Using Wearable Cameras to Assess Foods and Beverages Omitted in 24 Hour Dietary Recalls and a Text Entry Food Record App

Nutrients ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1806
Author(s):  
Virginia Chan ◽  
Alyse Davies ◽  
Lyndal Wellard-Cole ◽  
Silvia Lu ◽  
Hoi Ng ◽  
...  
Keyword(s):  
Dietary Assessment ◽  
Fats And Oils ◽  
Point Of View ◽  
Self Report ◽  
Smartphone App ◽  
Food Record ◽  
Post Hoc Analysis ◽  
Significant Difference ◽  
Post Hoc ◽  
Paired T Test

Technology-enhanced methods of dietary assessment may still face common limitations of self-report. This study aimed to assess foods and beverages omitted when both a 24 h recall and a smartphone app were used to assess dietary intake compared with camera images. For three consecutive days, young adults (18–30 years) wore an Autographer camera that took point-of-view images every 30 seconds. Over the same period, participants reported their diet in the app and completed daily 24 h recalls. Camera images were reviewed for food and beverages, then matched to the items reported in the 24 h recall and app. ANOVA (with post hoc analysis using Tukey Honest Significant Difference) and paired t-test were conducted. Discretionary snacks were frequently omitted by both methods (p < 0.001). Water was omitted more frequently in the app than in the camera images (p < 0.001) and 24 h recall (p < 0.001). Dairy and alternatives (p = 0.001), sugar-based products (p = 0.007), savoury sauces and condiments (p < 0.001), fats and oils (p < 0.001) and alcohol (p = 0.002) were more frequently omitted in the app than in the 24 h recall. The use of traditional self-report methods of assessing diet remains problematic even with the addition of technology and finding new objective methods that are not intrusive and are of low burden to participants remains a challenge.

Validation of a Belgian Prediction Model for Patient Encounters at Football Mass Gatherings

2021 ◽  
pp. 1-6
Author(s):  
Kris Spaepen ◽  
Door Lauwaert ◽  
Leonard Kaufman ◽  
Winne AP Haenen ◽  
Ives Hubloue
Keyword(s):  
Pearson Correlation ◽  
First Aid ◽  
Rank Test ◽  
Mean Deviation ◽  
Mass Gatherings ◽  
Actual Patient ◽  
Significant Difference ◽  
Correlation Tests ◽  
The Mean ◽  
Patient Presentation

Abstract Background: To validate the Belgian Plan Risk Manifestations (PRIMA) model, actual patient presentation rates (PPRs) from Belgium’s largest football stadium were compared with predictions provided by existing models and the Belgian PRIMA model. Methods: Actual patient presentations gathered from 41 football games (2010-2019) played at the King Baudouin Stadium (Brussels, Belgium) were compared with predictions by existing models and the PRIMA model. All attendees who sought medical help from in-event health services (IEHS) in the stadium or called 1-1-2 within the closed perimeter around the stadium were included. Data were analyzed by ANOVA, Pearson correlation tests, and Wilcoxon singed-rank test. Results: A total of 1,630,549 people attended the matches, with 626 people needing first aid. Both the PRIMA and the Hartman model over-estimated the number of patient encounters for each occasion. The Arbon model under-estimated patient encounters for 9.75% (95% CI, 0.49-19.01) of the events. When comparing deviations in predictions between the PRIMA model to the other models, there was a significant difference in the mean deviation (Arbon: Z = −5.566, P <.001, r = −.61; Hartman: Z = −4.245, P <.001, r = .47). Conclusion: When comparing the predicted patient encounters, only the Arbon model under-predicted patient presentations, but the Hartman and the PRIMA models consistently over-predicted. Because of continuous over-prediction, the PRIMA model showed significant differences in mean deviation of predicted PPR. The results of this study suggest that the PRIMA model can be used during planning for domestic and international football matches played at the King Baudouin Stadium, but more data and further research are needed.

scholarly journals Oxygen Saturation in the Dental Pulp of Maxillary and Mandibular Molars - Part 2

2017 ◽  
Vol 28 (6) ◽  
pp. 704-709 ◽  
Author(s):  
Carlos Estrela ◽  
Keila SA Oliveira ◽  
Ana Helena G Alencar ◽  
Fernando B Barletta ◽  
Cyntia RA Estrela ◽  
...  
Keyword(s):  
Oxygen Saturation ◽  
Dental Pulp ◽  
Oxygen Saturation Level ◽  
Significance Level ◽  
Cold Stimulus ◽  
Mandibular Molars ◽  
Maxillary Molars ◽  
Significant Difference ◽  
The Mean ◽  
Post Hoc

Abstract This study determined the oxygen saturation (SaO2) in dental pulp of healthy maxillary and mandibular molars. Mean of SaO2 was evaluated in 112 maxillary and mandibular molars using pulse oximetry. Quantitative variables were described by mean and standard deviation. Variables with symmetric distribution were compared by Student t test and Mann-Whitney test. Pearson’s correlation coefficient was used to correlate quantitative variables. Analysis of variance was used to assess differences in SaO2 levels between the molar groups, followed by post-hoc Tukey. The significance level established at p<0.05. Mean of oxygen saturation for the 112 molar dental pulps was 85.09%. There was no significant correlation (r=-0.007; p=0.977) between the mean of SaO2 of molar pulps with patient´s indicator finger (92.89%). There was a significant difference (p=0.037) between the mean of SaO2 of the first (85.76%) and second maxillary molars (81.87%), and it was not significant (p=0.1775) between the first and second mandibular molars. Maxillary molars had lower pulpal SaO2 (83.59%) than mandibular molars (86.89%) (p=0.018). The mean of the patient’s response time to the cold stimulus was 1.12 s (maxillary molars 1.25 s and mandibular molars 0.99 s)(p=0.052). There was no significant correlation between the time response of the patient to the cold stimulus and the SaO2 for molars. The mean oxygen saturation level was 85.09%. The mandibular molars presented higher SaO2 level than maxillary molars.

scholarly journals The Effect of Glaze Coating on Wear Resistance of Some Acrylic Denture Teeth: An In Vitro Study

2021 ◽  
Vol 13 (2) ◽  
pp. 47-51
Author(s):  
Samaneh Abbasi ◽  
Soodabe Ebrahimi ◽  
Arash Shisheian ◽  
Maryam Farhadian
Keyword(s):  
Wear Resistance ◽  
In Vitro Study ◽  
Resistance Rate ◽  
Vitro Study ◽  
Wear Rates ◽  
Denture Teeth ◽  
Significant Difference ◽  
The Mean ◽  
Post Hoc

Background: Acrylic resin teeth wear resistance has an important role in the denture longevity. This study aimed to clarify the effect of glaze coating on wear resistance of three types of artificial acrylic teeth. Methods: In this in vitro study, the wear resistance rate of three of acrylic denture teeth (GENIUS, STON and CLASSIC) was compared with Ivoclar teeth (n=25/group). The wear resistance was measured by estimating the weight loss in pre and post removing glaze coating, following 5000 cycles in the chewing simulator device. Data analysis was made using paired t test, one-way ANOVA and Tukey’s post hoc test. Results: ANOVA test showed that there was no significant difference between the mean amount of wear of GENIUS, CLASSIC, STON and IVOCLAR teeth in the first stage (P <0.061), but this difference was significant (P <0.001) in the second stage. The result of Tukey post hoc test showed that wear rates of GENIUS were significantly lower than other groups (P<0.001). Comparison between the mean wear rates of each dental group at the first and second stages showed a significant difference between average teeth wear resistance of CLASSIC, STON and IVOCLAR in the first and second stages (P <0.001). Conclusions: In conclusion, the teeth wear resistance of STON and CLASSIC were similar to IVOCLAR. Also, after removing the glaze coating, the teeth wear resistance decreased in all groups but was not statistically significant for group GENIUS.

scholarly journals The Accuracy of Individualized 3D-Printing Template-Assisted I125 Radioactive Seed Implantation for Recurrent/Metastatic Head and Neck Cancer

2021 ◽  
Vol 11 ◽  
Author(s):  
Bin Qiu ◽  
Yuliang Jiang ◽  
Zhe Ji ◽  
Haitao Sun ◽  
Jinghong Fan ◽  
...  
Keyword(s):  
Head And Neck Cancer ◽  
3D Printing ◽  
Head And Neck ◽  
Neck Cancer ◽  
Mean Deviation ◽  
Conformity Index ◽  
Seed Implantation ◽  
Significant Difference ◽  
Radioactive Seed ◽  
The Mean

PurposeTo evaluate the accuracy of individualized 3D-printing template-assisted I125 radioactive seed implantation (3D-PT assisted I125 RSI) for recurrent/metastatic head and neck cancer.Materials and MethodsFrom February 2017 to January 2020, clinical data of 41 patients (mean age, 58.5 ± 16.1 years; 28 males) with recurrent (48.8%)/metastatic (51.2%) head and neck cancer underwent individualized 3D-PT assisted I125 RSI under CT guidance in a single institute were retrospectively reviewed. Total 430 seed needles [mean, 10.5 (range 3–17) per patient] were inserted.ResultsAll seed needles were inserted manually in a single attempt with the technical success rate of 100% without major perioperative complications. The mean needle’s entrance deviation was 0.090 cm (95% Confidence Interval, 0.081–0.098). The mean intraoperative depth and angle of the needle were consistent with that of planned (6.23 ± 0.24 vs. 6.21 ± 0.24 cm, p = 0.903; 83.14 ± 3.64 vs. 83.09 ± 3.66 degrees, p = 0.985, respectively). The mean deviation between the needle’s planned and intraoperative depth and angle was 0.168 ± 0.024 cm and 1.56 ± 0.14 degrees, respectively. The postoperative dosimetry parameters, including D90, D100, V100, V150, V200, conformity index, external index, and homogeneity index, were all well-coordinated with planned dosimetry without significant difference (p = 0.515, 0.662, 0.958, 0.865, 0.872, 0.278, 0.456, and 0.989, respectively).ConclusionsWithin the limitation of this study, individualized 3D-PT assisted I125 RSI may be accurate in obtaining favorable postoperative dosimetry for patients with recurrent/metastatic head and neck cancer.Clinical Trial Registration[website], identifier [registration number].

scholarly journals Comparative analysis of the anterior and posterior length and deflection angle of the cranial base, in individuals with facial Pattern I, II and III

2013 ◽  
Vol 18 (1) ◽  
pp. 69-75 ◽  
Author(s):  
Guilherme Thiesen ◽  
Guilherme Pletsch ◽  
Michella Dinah Zastrow ◽  
Caio Vinicius Martins do Valle ◽  
Karyna Martins do Valle-Corotti ◽  
...  
Keyword(s):  
Deflection Angle ◽  
Cranial Base ◽  
Profile Angle ◽  
Mean Values ◽  
Anterior Cranial Base ◽  
Significant Difference ◽  
Facial Pattern ◽  
Caucasian Patients ◽  
The Mean ◽  
Post Hoc

OBJECTIVE: This study evaluated the variations in the anterior cranial base (S-N), posterior cranial base (S-Ba) and deflection of the cranial base (SNBa) among three different facial patterns (Pattern I, II and III). METHOD: A sample of 60 lateral cephalometric radiographs of Brazilian Caucasian patients, both genders, between 8 and 17 years of age was selected. The sample was divided into 3 groups (Pattern I, II and III) of 20 individuals each. The inclusion criteria for each group were the ANB angle, Wits appraisal and the facial profile angle (G'.Sn.Pg'). To compare the mean values obtained from (SNBa, S-N, S-Ba) each group measures, the ANOVA test and Scheffé's Post-Hoc test were applied. RESULTS AND CONCLUSIONS: There was no statistically significant difference for the deflection angle of the cranial base among the different facial patterns (Patterns I, II and III). There was no significant difference for the measures of the anterior and posterior cranial base between the facial Patterns I and II. The mean values for S-Ba were lower in facial Pattern III with statistically significant difference. The mean values of S-N in the facial Pattern III were also reduced, but without showing statistically significant difference. This trend of lower values in the cranial base measurements would explain the maxillary deficiency and/or mandibular prognathism features that characterize the facial Pattern III.

scholarly journals Effect of Galla Chinensis on Remineralization of Early Dentin Lesion

2020 ◽  
Vol 14 (04) ◽  
pp. 651-656
Author(s):  
Hend Mahmoud Abdel-Azem ◽  
Ahmed Fawzy Abo Elezz ◽  
Rehab Khalil Safy
Keyword(s):  
Treatment Time ◽  
Analysis Data ◽  
Environmental Scanning ◽  
X Ray ◽  
Parametric Data ◽  
Significant Difference ◽  
Ph Cycling ◽  
The Mean ◽  
Post Hoc

Abstract Objective This study aimed to investigate the efficacy of the Galla chinensis extract (GCE) on early dentin lesion remineralization. Materials and Methods Seventy-two dentin specimens were divided into three groups according to the treatment solution. In group S1, specimens were treated with GCE; in group S2, the specimens were treated with sodium fluoride (NaF); meanwhile, specimens of group S3 were treated with distilled water (DW). Each group was further subdivided into two subgroups according to the treatment time (1 minute and 5 minutes). An in vitro pH-cycling model for 12 days was done. Subsequently, surface microhardness (SMH) of the specimens, elemental analysis, and their micromorphological appearance were evaluated. Statistical Analysis Data were statistically analyzed. One-way analysis of variance was used to compare numerical (parametric) data between more than two separate groups followed by post hoc Tukey. Results There was no significant difference between the mean SMH of dentin between NaF and GCE groups. Regarding the time, the 5-minute treatment with NaF and DW groups recorded higher mean SMH value of dentin than the 1-minute treatment group. Meanwhile, for GCE groups, the 1-minute immersion recorded higher mean SMH value than the 5-minute immersion without any significant difference between them. The microhardness results were confirmed by environmental scanning electron microscope and energy dispersive X-ray analysis results. Conclusion GCE could be used as an effective alternative for dentin remineralization.

Validation of a Belgian Prediction Model for Patient Encounters at Belgium’s Largest Public Cultural Mass Gathering

2021 ◽  
pp. 1-6
Author(s):  
Kris Spaepen ◽  
Geert Arno ◽  
Leonard Kaufman ◽  
Winne Haenen ◽  
Ives Hubloue
Keyword(s):  
Presentation Rate ◽  
The Other ◽  
High Rate ◽  
Mean Deviation ◽  
Mass Gathering ◽  
Medical Assistance ◽  
Actual Patient ◽  
Significant Difference ◽  
The Mean ◽  
Patient Presentation

Abstract Objective: To compare actual patient presentation rates from Belgium’s largest public open-air cultural festival with predictions provided by existing models and the Belgian Plan Risk Manifestations model. Methods: Retrospectively, actual patient presentation rates gathered from the Ghent Festivities (Belgium) during 2013–2019 were compared to predicted patient presentation rates by the Arbon, Hartman, and PRIMA models. Results: During 7 editions, 8673000 people visited the Ghent Festivities; 9146 sought medical assistance resulting in a mean patient presentation rate (PPR) of 1.05. The PRIMA model overestimated the number of patient encounters for each occasion. The other models had a high rate of underprediction. When comparing deviations in predictions between the PRIMA model to the other models, there is a significant difference in the mean deviation (Arbon: T = 0.000, P < 0.0001, r = −0.8701; Hartman: T = 0.000, P < 0.0001, r = −0.869). Conclusion: Despite the differences between the predictions of all 3 models, our results suggest that the PRIMA model is a valid tool to predict patient presentations to IEHS during public cultural MG. However, to substantiate the PRIMA model even further, more research is needed to further validate the model for a broad range of MG.

scholarly journals Safe Pedestrian Behaviours among Children Aged 7 to 9 in Malaysia

2019 ◽  
Vol 30 (2) ◽  
pp. 61-65
Author(s):  
Low Fin ◽  
Nurfatin Suhaimi ◽  
Nur Nor ◽  
Amelia Ghani
Keyword(s):  
Random Sample ◽  
Road Safety ◽  
Safety Education ◽  
The Road ◽  
Large N ◽  
Significant Difference ◽  
The Mean ◽  
Low Levels ◽  
Post Hoc ◽  
One Way Anova

The present study examined safe pedestrian behaviours according to the Malaysian Road Safety Education module among 7-year-old to 9-year-old children in Malaysia. A survey was conducted with a relatively large (n = 1206) random sample of children aged 7 to 9 years old, drawn from 24 selected schools in six states in Malaysia based on the highest numbers of crash cases. Analysis of one-way ANOVA revealed a statistically significant difference in safe pedestrian behaviours between different ages. Post hoc comparisons using the Tukey HSD test indicated that the mean score of safe pedestrian behaviours for 7-year-old children was significantly higher than that of 8-year-old children (p = .004) and 9-year-old children (p = .021). No statistically significant difference was revealed between the 8-year-olds and 9-year-olds (p = .859) at the 0.05 level. Although many children reported safe pedestrian behaviours, low levels of certain safe pedestrian behaviours were also reported – less than 30% of the children aged 7 to 9 reported to ‘always’ wear bright clothes, walk against the traffic, and wave at the drivers to cross the road. In addition, a small percentage (9.9-13.6%) of children aged 7 to 9 also reported to ‘always’ wear dark clothes at night, cross the street between parked cars, and run to cross the road. These findings may inform programs to improve children’s safe pedestrian behaviours.

scholarly journals Disentangling the role of income level on premium brand perceived quality, awareness, association, and loyalty: A comparative study within Thailand and Indonesia

2021 ◽  
Vol 18 (1) ◽  
pp. 80
Author(s):  
Komm Pechinthorn ◽  
Nico Irawan ◽  
Kyawt Shinn Thant Zin ◽  
Sineenat Suasungnern ◽  
Jirangrug Samarkjarn ◽  
...  
Keyword(s):  
Low Income ◽  
Income Level ◽  
Perceived Quality ◽  
Online Questionnaire ◽  
Significant Difference ◽  
The Mean ◽  
Post Hoc ◽  
Quality Awareness ◽  
Low Income Consumers

The level of income is one of the specific consumer conditions that susceptible to influence their brand decision-making. Unfortunately, studies on the influence of income mainly focused on price without considering the relationship between brand and consumers. This study aims to examine how brand perceived quality, awareness, association, and loyalty related to the level of income in emerging countries like Thailand and Indonesia. Premium and high-class coffee chain brands choose as the object of this study as the exponential growth of the coffee culture in both countries. A total of 283 respondents have completed an online questionnaire and verified it to be processed into the analysis of variance (ANOVA) and LSD post hoc test for multiple comparison statistical analysis. The result of this study shows that although high-income and low-income consumers in Thailand tend to have the same perceived quality toward the premium coffee brand, in general, there is a significant difference in the mean of brand perceived quality, awareness, and association between various consumers income level in Thailand. Interestingly, this study found that there is no significant difference in the mean of premium coffee brand perceived quality, awareness, association, and loyalty within the group of income levels in Indonesia. This indicates that Indonesians tend to ignore how much money they have in their pocket when it comes to coffee as the coffee culture becoming a new habit and lifestyle.

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