Application and Evaluation of a Manikin with a Multimedia System for Preclinical Dental Medicine Training (Preprint)

2020 ◽  
Author(s):  
Yi Yang ◽  
Wei Zhang ◽  
Jia Qing ◽  
Zhi Li
Keyword(s):  
Good Alternative ◽  
Multimedia System ◽  
Cavity Preparation ◽  
System P ◽  
Final Questionnaire ◽  
Crown Preparation ◽  
Medicine Education ◽  
Real Clinical Practice ◽  
Better Than ◽  
Preclinical Training

BACKGROUND Preclinical training on manikins is a key component of dental medicine education. Preclinical practice on traditional manikins and real clinical practice shows massive differences. Specifically, preclinical training on traditional manikins is inefficient. OBJECTIVE The aim of this study is to describe a manikin with a multimedia system and evaluate its effectiveness in preclinical dentistry training. METHODS A total of 159 students participated in this study. Amongst these students, 80 used traditional manikins (Group TM) for preclinical practices, including cavity preparation and full-crown preparation, and 79 used a manikin with a multimedia system (Group MM). The cavity preparation scores and full-crown preparation grades of the two groups were compared. The students and teachers completed a final questionnaire survey to evaluate their experience of preclinical practices using the manikin with a multimedia system. RESULTS Group MM performed better than Group TM in the preclinical practices of cavity preparation and full-crown preparation. The final questionnaire results indicated that students in Group MM were satisfied with the clarity, simulation, helpfulness in mastering operation points quickly and improvement in operation proficiency provided by the manikin with a multimedia system. The teachers were satisfied with the teaching effect of the manikin with a multimedia system and had a high opinion of the students’ mastery. CONCLUSIONS The results of this study indicated that manikins with a multimedia system are a good alternative traditional manikins in preclinical dentistry training.

scholarly journals EMULSIFYING PROPERTIES OF AFZELIA GUM IN LIQUID PARAFFIN EMULSION

2016 ◽  
Vol 8 (11) ◽  
pp. 195 ◽  
Author(s):  
Emmanuel O. Olorunsola ◽  
Stephen O. Majekodunmi
Keyword(s):  
Surface Activity ◽  
Liquid Paraffin ◽  
Tween 80 ◽  
Good Alternative ◽  
Emulsifying Properties ◽  
Acacia Gum ◽  
Emulsifying Agent ◽  
Afzelia Africana ◽  
Better Than

Objective: Afzelia africana gum has been shown to possess surface activity. It is a good alternative to sodium carboxy methylcellulose in terms of suspending properties. This work was aimed at evaluating the emulsifying properties of the gum in liquid paraffin emulsion.Methods: Liquid paraffin emulsions (200 ml each) were prepared with different concentrations (1, 2, 3, 5 and 10 % w/v) of afzelia gum as an emulsifying agent. Similar preparations containing standard acacia gum at corresponding concentrations were also made. Liquid paraffin emulsions (200 ml each) were equally prepared using 60 ml liquid paraffin as the oily phase and 6 g of various combinations of afzelia gum and tween 80 as emulsifier blends. The emulsifier blends were of ratio 1:5, 1:2, 1:1, 2:1 and 5:1. The preparations were assessed for density and viscosity; and then for stability after 5 d of storage.Results: The viscosity of emulsion containing 10 % w/v afzelia gum was 668.90 mPa.s while that of an emulsion containing the same concentration of acacia gum was 23.56 mPa. s. Emulsion containing 3 % w/v afzelia gum (having a creaming index of 16 %) was found to be more stable compared to the emulsion containing 10 % w/v acacia gum (having creaming index of 28 %). The viscosity and stability of emulsions containing emulsifier blends of afzelia gum and tween 80 increased with increase in the proportion of afzelia gum.Conclusion: The gum is suitable for use at a concentration of 3 % w/v as an emulsifier in 30 % v/v liquid paraffin emulsion, and it is about three times better than acacia gum as an emulsifier. It is a good alternative to standard acacia gum for emulsification. 

scholarly journals A New Flexible Version of the Lomax Distribution with Applications

2018 ◽  
Vol 7 (5) ◽  
pp. 120
Author(s):  
T. H. M. Abouelmagd
Keyword(s):  
Estimation Method ◽  
Good Alternative ◽  
Model Parameters ◽  
Data Sets ◽  
Suitable Model ◽  
Lifetime Data ◽  
New Model ◽  
The Right ◽  
New Distribution ◽  
Better Than

A new version of the Lomax model is introduced andstudied. The major justification for the practicality of the new model isbased on the wider use of the Lomax model. We are also motivated tointroduce the new model since the density of the new distribution exhibitsvarious important shapes such as the unimodal, the right skewed and the leftskewed. The new model can be viewed as a mixture of the exponentiated Lomaxdistribution. It can also be considered as a suitable model for fitting thesymmetric, left skewed, right skewed, and unimodal data sets. The maximumlikelihood estimation method is used to estimate the model parameters. Weprove empirically the importance and flexibility of the new model inmodeling two types of aircraft windshield lifetime data sets. The proposedlifetime model is much better than gamma Lomax, exponentiated Lomax, Lomaxand beta Lomax models so the new distribution is a good alternative to thesemodels in modeling aircraft windshield data.

scholarly journals EVALUATION OF WATER CONSERVATION POTENTIAL OF NON-TURF GROUNDCOVERS VS. KENTUCKY BLUEGRASS UNDER INCREASING LEVELS OF DROUGHT STRESS.

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 676c-676
Author(s):  
David Staats ◽  
James E. Klett
Keyword(s):  
Drought Stress ◽  
Field Study ◽  
Water Conservation ◽  
Kentucky Bluegrass ◽  
Good Alternative ◽  
The Other ◽  
Irrigation Treatments ◽  
Better Than

In June 1991, a two year field study was initiated to examine if three non-turf groundcovers with reputations for using low amounts of water actually use less water than Kentucky bluegrass (KBG). Irrigation treatments were based on percentages of ET (100%, 75%, 50%, 25%, 0%) and calculated by the modified Penman equation. Results from the 1991 season indicate that at the 100% and 75% treatments Potentilla tabernaemontani and Cerastium tomentosum were significantly better than the other species in terms of establishment and vigor but quality declined significantly at rates below 75%. At the 50% rate both KBG and Sedum acre maintained good quality although growth was slow. At the 25% rate, quality of KBG significantly declined while Sedum acre maintained good quality. Quality of Sedum acre declined only slightly at the 0% treatment and would be a good alternative to KBG if water conservation was a high priority in the landscape.

Pengaruh Asap Cair Kayu Galam (Malaleuca leucadendra) dalam Bentuk Biodegradable Film terhadap Pengawetan Ikan Gabus (The Effect of Liquid Smoke Galam (Malaleuca leucadendra) in Biodegradable Film Form as Fish Cork Preservation)

2017 ◽  
Vol 9 (2) ◽  
pp. 75-90 ◽  
Author(s):  
Rais Salim ◽  
Nazarni Rahmi
Keyword(s):  
Ph Value ◽  
Liquid Product ◽  
Good Alternative ◽  
Edible Film ◽  
Biodegradable Film ◽  
Microbiological Test ◽  
Liquid Smoke ◽  
Microbiological Testing ◽  
Better Than

Liquid smoke is a liquid product made from the condensation of smoke from carbonization process of lignocellulosic material. Liquid smoke of wooden galam (Melaleuca leucadendra) is a material that can be used as a natural preservative on fish. The use of an edible film packaging with the addition of liquid smoke of wooden galam is a good alternative to improve the durability and quality of fish during storage. This research is aimed to determine the effect of liquid smoke of wooden galam in biodegradable film for fish preservation. The edible film formulas were gelatin-pectin (AB), gelatin-smoke liquid (AC), and gelatin-pectin-smoke liquid (ABC) and compared with control (without treatment). The parameters of fish storage observed were pH measurement, Total Volatile Base-Nitrogen (TVBN), and microbiological test. The result after 10 days of storage showed that the pH value were 5.45 incontrol, AB 5.43, AC 5.47 and ABC 5.46; theTVBN values were 48 mgN/100gin control, AB 32 mgN/100g, AC 36 mgN/100g and ABC 36 mgN/100g; as well as microbiological testing, TPC value on 15x106 CFU/g, AB 11x103 CFU/g, AC 18.5x103 CFU/g, and ABC 4x103 controls and Coliform controls 5.0x106, AB 3.5x102, AC 1.0x101, and ABC 4.0x100. The treatment of liquid wooden galam smoke in a form of biodegradable film was capable to maintain the quality of fish better than without treatment shown in the low microbiological testing values (TPC and Coliform), eventhough it did not show significant effect in maintaining the TVB value during 10 days storage at ± 4° C. Keywords:  liquid smoke, Coliform, edible film, pH, TPC

scholarly journals Thermodynamics of Insulated Pressure Vessels for Vehicular Hydrogen Storage

1998 ◽  
Vol 120 (2) ◽  
pp. 137-142 ◽  
Author(s):  
S. M. Aceves ◽  
G. D. Berry
Keyword(s):  
Low Temperature ◽  
Hydrogen Storage ◽  
Ambient Temperature ◽  
Low Pressure ◽  
Good Alternative ◽  
Pressure Vessels ◽  
Normal Operation ◽  
Light Duty ◽  
Light Duty Vehicles ◽  
Better Than

This paper studies the application of insulated pressure vessels for hydrogen-fueled light-duty vehicles. Insulated pressure vessels are cryogenic-capable pressure vessels that can be fueled with liquid hydrogen (LH2); low-temperature (46 K) compressed hydrogen (CH2); or ambient-temperature CH2. In this analysis, hydrogen temperatures, pressures, and venting losses are calculated for insulated pressure vessels fueled with LH2 or with low-temperature CH2, and the results are compared to those obtained in low-pressure LH2 tanks. Hydrogen losses are calculated as a function of daily driving distance during normal operation; as a function of time during long periods of vehicle inactivity; and as a function of initial vessel temperature during fueling. The results show that insulated pressure vessels have packaging characteristics comparable or better than those of conventional, low-pressure LH2 tanks, with greatly improved dormancy and much lower boil-off, and therefore appear to be a good alternative for vehicular hydrogen storage.

scholarly journals Odd Lindley-Lomax Model: Statistical Properties and Applications

1970 ◽  
pp. 419-430
Author(s):  
M. Masoom Ali ◽  
Mustafa Ç. Korkmaz ◽  
Haitham M. Yousof ◽  
Nadeem Shafique Butt
Keyword(s):  
Maximum Likelihood ◽  
Estimation Method ◽  
Likelihood Estimation ◽  
Good Alternative ◽  
Model Parameters ◽  
Lifetime Data ◽  
Monte Carlo Simulation Study ◽  
Computational Aspects ◽  
Maximum Likelihood Estimation Method ◽  
Better Than

 In this work, we focus on some new theoretical and computational aspects of the Odd Lindley-Lomax model. The maximum likelihood estimation method is used to estimate the model parameters. We show empirically the importance and flexibility of the new model in modeling two types of aircraft windshield lifetime data. This model is much better than exponentiated Lomax, gamma Lomax, beta Lomax and Lomax models so the Odd Lindley-Lomax lifetime model is a good alternative to these models in modeling aircraft windshield data. A Monte Carlo simulation study is used to assess the performance of the maximum likelihood estimators. 

scholarly journals Comparative study of oral ivermectin, topical permethrin and benzyl benzoate in the treatment of scabies

2019 ◽  
Vol 7 (12) ◽  
pp. 4743
Author(s):  
G. Chitti Babu ◽  
Kavita Dhar Bagati ◽  
Praveen Agarwal ◽  
Jyostna Sharma
Keyword(s):  
Good Alternative ◽  
Benzyl Benzoate ◽  
Effective Treatment Option ◽  
Treatment Groups ◽  
Number Of Patients ◽  
Group A ◽  
Group B ◽  
Clinical Grading ◽  
Better Than

Background: Efficacy of these modalities as shown by various investigations are inconsistent and ambiguous. Thus, evidence based effective treatment option is warranted. Aim of the study was to compare the efficacy of oral ivermectin, topical permethrin and benzyl benzoate in the treatment of uncomplicated scabies.Methods: Patients with confirmed diagnosis of scabies were included in this study. One hundred and ninety-five subjects were included in this investigation as per inclusion and exclusion criteria laid down. Equal numbers of patients were randomly allocated to one of the three treatment groups. Efficacy of three groups [oral ivermectin (Group A), topical permethrin (Group B) and benzyl benzoate (Group C)] of drugs was compared in terms of improvement in clinical grading of disease (%) and improvement in clinical grading of pruritus (%) during follow up visits.Results: Those subjects receiving topical permethrin, at 1st follow up 56.9% showed cure rate which increased to 89.2% at 2nd follow up with respect to clinical improvement in pruritus. Maximum relief in severity of pruritus at the end of 6th week was reported by 58(89.2%) patients receiving group B treatment modality followed by 52 patients (80%) in arm A. Regarding efficacy of three treatment groups in terms of improvement in severity of lesion at the end of 6 weeks, maximum number of patients 57(87.7%), receiving group B treatment reported improvement which is better than other two treatment groups.Conclusions: maximum number of patients receiving topical Permethrin treatment reported improvement better than other Oral Ivermectin therapy and topical benzyl benzoate. Oral ivermectin may serve a good alternative for managing scabies under certain conditions like poor compliance to topical scabicides.

scholarly journals Application of Radiofrequency Ablation in Treatment of Tachyarrhythmia based on CartoUnivu and Carto3 Intelligent System (Preprint)

2020 ◽  
Author(s):  
Guoqiang Wang ◽  
Guocai Chen ◽  
Xueqin Huang ◽  
Jianbo Hu ◽  
Xuejun Yu
Keyword(s):  
Radiofrequency Ablation ◽  
Intelligent System ◽  
Paroxysmal Supraventricular Tachycardia ◽  
Ventricular Premature Beat ◽  
Cure Rate ◽  
High Cure Rate ◽  
X Ray ◽  
System P ◽  
First Choice ◽  
Better Than

BACKGROUND Background: Radiofrequency ablation has obvious advantages in the treatment of arrhythmia, like few postoperative complications, high cure rate, low recurrence rate, and small trauma, which has become the first choice for patients to treat arrhythmia. OBJECTIVE Objective: To study the X-ray dose of radiofrequency ablation in patients with paroxysmal supraventricular tachycardia (PSVT), ventricular premature beat and ventricular tachycardia (PVC/VT) arrhythmia based on CartoUnivu and Carto3 intelligent system. METHODS Methods: Radiofrequency ablation based on CartoUnivu and Carto3 system was used to treat patients with PSVT, PVC/VT arrhythmia, and the X-ray dose of thyroid, perineum, left upper arm, intrathyroid, extrathyroid, intrathoracic, extrathoracic, intraperineum, extraperineum and other parts during the treatment was analyzed. RESULTS Results: In most PSVT patients, radiofrequency ablation guided by Carto-3 system had lower X-ray dose than that of CartoUnivu. Radiofrequency ablation under the guidance of CartoUnivu was better than that of Carto3 regarding the X-ray level of most PVC/VT patients. Radiofrequency ablation under the guidance of CartoUnivu system had lower X-ray radiation for PVC/VT patients. CONCLUSIONS Conclusions: CartoUnivu system and Carto3 system can guide the precise treatment of complex arrhythmia, have a high success rate and better safety, can significantly reduce the X-ray exposure time and dose received by patients and operators, and the risk of X-ray related damage is significantly reduced, which is worth promoting. CLINICALTRIAL

scholarly journals COP enhancement and comparison of different absorption cooling systems

2020 ◽  
Vol 330 ◽  
pp. 01032
Author(s):  
Nihel Ben Zid ◽  
Nejib Hajji ◽  
Mohamed El Ganaoui
Keyword(s):  
Good Alternative ◽  
Absorption Refrigeration ◽  
Entrainment Ratio ◽  
Cooling Systems ◽  
Absorption Cooling ◽  
Flash Tank ◽  
Single Effect ◽  
Simulation Results ◽  
Absorption Cycle ◽  
Better Than

The absorption refrigeration machines represent a good alternative to compression refrigeration machines but the major problem of this type of refrigeration lies in the COP, which seems to be less efficient. Several researches are carried out to improve the performances of these machines such as the combination with the technology of the ejectors. In this work, we are interested in the three ammonia-water absorption cycles: Single effect absorption, Ejector-absorption and Combined ejector-flash tank absorption cycles. A gas-gas ejector would be installed between the generator and the condenser. We suppose that adding a flash tank between the condenser and the evaporator could help improve the entrainment ratio of the ejector. We used simulations in order to compare the performances of these three different cycles. The simulation results demonstrate that the combined ejector-flash tank absorption cycle performs better than others.

Goal Specificity and Learning with a Hypermedia Program

2002 ◽  
Vol 49 (2) ◽  
pp. 98-108 ◽  
Author(s):  
Regina Vollmeyer ◽  
Bruce D. Burns
Keyword(s):  
Problem Solving ◽  
Dual Space ◽  
World War ◽  
Extra Information ◽  
Specific Goal ◽  
Final Questionnaire ◽  
Goal Specificity ◽  
Specificity Effects ◽  
New Situation ◽  
Better Than

Abstract. Problem solving research has found that a nonspecific goal (NSG) leads to better learning than a specific goal (SG). This effect can be understood in terms of dual-space search theories of problem solving. To apply the theory, we studied goal specificity effects with a hypermedia program in which participants had to learn about the outbreak of World War 1, either with the goal to find twenty dates (i.e., SG) or with the goal to explain the reasons for the war (i.e., NSG). As expected, compared to the SG-group, the NSG-group correctly answered more factual questions about the text during the task, spent more time on average per page, and more often looked for extra information. In a final questionnaire with factual and inferential questions, the NSG-group still performed better than the SG-group. The NSG-group may also show better transfer of what they had learnt to a new situation.

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