bluuebunny/crossref_metadata_2025 huggingface dataset:
Causes of Death in a Contemporary Cohort of Patients With Type 2 Diabetes and Atherosclerotic Cardiovascular Disease: Insights From the TECOS Trial
Authors: Sharma Abhinav , Green Jennifer B. , Dunning Allison , Lokhnygina Yuliya , Al-Khatib Sana M. , Lopes Renato D. , Buse John B. , Lachin John M. , Van de Werf Frans , Armstrong Paul W. , Kaufman Keith D. , Standl Eberhard , Chan Juliana C.N. , Distiller Larry A. , Scott Russell , Peterson Eric D. , Holman Rury R.
Published: October 2017

OBJECTIVE

We evaluated the specific causes of death and their associated risk factors in a contemporary cohort of patients with type 2 diabetes and atherosclerotic cardiovascular disease (ASCVD).

RESEARCH DESIGN AND METHODS

We used data from the Trial Evaluating Cardiovascular Outcomes with Sitagliptin (TECOS) study (n = 14,671), a cardiovascular (CV) safety trial adding sitagliptin versus placebo to usual care in patients with type 2 diabetes and ASCVD (median follow-up 3 years). An independent committee blinded to treatment assignment adjudicated each cause of death. Cox proportional hazards models were used to identify risk factors associated with each outcome.

RESULTS

A total of 1,084 deaths were adjudicated as the following: 530 CV (1.2/100 patient-years [PY], 49% of deaths), 338 non-CV (0.77/100 PY, 31% of deaths), and 216 unknown (0.49/100 PY, 20% of deaths). The most common CV death was sudden death (n = 145, 27% of CV death) followed by acute myocardial infarction (MI)/stroke (n = 113 [MI n = 48, stroke n = 65], 21% of CV death) and heart failure (HF) (n = 63, 12% of CV death). The most common non-CV death was malignancy (n = 154, 46% of non-CV death). The risk of specific CV death subcategories was lower among patients with no baseline history of HF, including sudden death (hazard ratio [HR] 0.4; P = 0.0036), MI/stroke death (HR 0.47; P = 0.049), and HF death (HR 0.29; P = 0.0057).

CONCLUSIONS

In this analysis of a contemporary cohort of patients with diabetes and ASCVD, sudden death was the most common subcategory of CV death. HF prevention may represent an avenue to reduce the risk of specific CV death subcategories.
Aspectos de análisis textual y musical en los «Duetti e terzetti», op. III (1707) de Francesco Antonio Pistocchi / Aspects of Textual and Musical Analysis in «Duetti e terzetti», op. III (1707) by Francesco Antonio Pistocchi
Authors: Béjar Bartolo Alejandra
Published: October 2017

Los «Duetti e terzetti», op. III del reconocido músico italiano Francesco Antonio Pistocchi (1659-1726) –una colección impresa de doce composiciones vocales (diez duetos y dos tercetos)– representan un excelente (y desconocido) repertorio para los intérpretes de hoy, quienes encuentran difícil comprender correctamente sus textos poéticos. El artículo proporciona una traducción al español de todos los textos poéticos, así como también el análisis estructural y de la relación texto-música de cada composición, extremadamente útiles para una correcta interpretación.
Antifungal properties of sodium peroxide and sodium hypochlorite as a denture cleanser for full acrylic denture in vitro
Authors: Subrata Gantini
Published: October 2017

Widely used materials are reported as denture cleansers are peroxide and hypochlorite. Many contradictions on the effectiveness of the commercial peroxide base solution against Candida albicans (C. albicans). Low concentration sodium hypochlorite (0.5%) is used as a household sanitizer. But it is still unknown whether it has an antifungal effect, what is the optimum concentration and contact time to destroy the yeast. The purpose of this study is to examine the antifungal efficacy of commercial peroxide-based soaking solution and low concentration sodium hypochlorite against C. albicans, to determine the optimum concentration and contact time, and at the end, to obtain an effective denture soaking solution which is safe to use, easy to get, affordable and could be used to destroy C. albicans on dentures. The research conducted was an in vitro practical test for surface disinfectant. Sixty plates of acrylic which were already incubated with C. albicans are immersed in peroxide and hypochlorite base soaking solution in different concentration and contact time. The result showed that peroxide base was not effective to C. albicans and hypochlorite base solution can destroy C. albicans in 10 minutes at a concentration of 0,125%. Thus, the use of low concentration sodium hypochlorite as a denture soaking solution can be suggested.
Comparison on taste threshold between adult male white cigarette and clove cigarette smokers using Murphy clinical test method
Authors: Tapilatu Ronald Reyses , Haroen Edeh Rolleta , Wihardja Rosiliwati
Published: October 2017

The habit of smoking white cigarettes and clove cigarettes may affect the gustatory function, that is, it will cause damage to taste buds, resulting in an increase in gustatory threshold. This research used the descriptive comparative method and had the purpose of obtaining an illustration of gustatory threshold and compare gustatory threshold in white cigarette smokers and clove cigarette smokers in young, male adults. For gustatory threshold evaluation, the Murphy method was used to obtain a value for perception threshold and taste identification threshold using sucrose solution of 0.0006 M-0.06 M concentration. Research results indicate that the perception threshold and identification threshold of young, male adult smokers are 0.0119 M and 0.0292 M. Young, male adult clove cigarette smokers have a perception threshold and identification threshold of 0.0151 M and 0.0348 M. The conclusion of this research is that the perception threshold of young, male adult white cigarette smokers and clove cigarette smokers are the same, whereas the identification threshold of young, male adult white cigarette smokers and clove cigarette smokers are different, that is, the identification threshold of clove cigarette smokers is higher than that of white cigarette smokers.
Chemotherapy-induced mucositis pursuant to different phase of chemotherapy in children with acute lymphoblastic leukemia at Hasan Sadikin Hospital Bandung
Authors: Pertiwi Arlette Suzy Puspa
Published: October 2017

Acute Lymphoblastic Leukemia is the most common Leukemia seen in children. This disease has a manifestation in the oral mucosa, which is caused by either the disease itself or its treatment by chemotherapy, such as mucositis. Oral mucositis is one of a common, debilitating complication of cancer chemotherapy. Mucosal toxicity depends on Several factors; one of them is the duration of the therapy. The aim of this study is to evaluate chemotherapy-induced mucositis pursuant to a different phase of chemotherapy in children with Acute Lymphoblastic Leukemia. Twenty children diagnosed with Acute Lymphoblastic Leukemia who received induction, consolidation, and maintenance chemotherapy of Hasan Sadikin Hospital were included in this study. The criteria used for assessing mucositis was based on general mucositis scale from WHO. Data were collected and presented in the form of tables and percentages. The results showed that every child had developed mucositis during the course of chemotherapy in the induction and consolidation phase, except one child in the maintenance group did not the. at the induction phase 14,3% had developed mucositis at scale 2 and 86,7 at scale 3, consolidation phase 50% at scale 2 and 50% at scale 1, and in maintenance phase 14,3% in scale 28,6% in scale 1, and 57,1 in scale 2. Generally, it was concluded that mucositis develops in every phase of chemotherapy but the scale is slighter as the course of chemotherapy enters the advanced phases.
The hardness of five acrylic artificial teeth brands marketed in Bandung city
Authors: Dziab Hasna , Hasratiningsih Zulia , Kurnikasari Erna
Published: October 2017

The acrylic artificial teeth are still among the most frequently used artificial teeth. Some commercial brands marketed in Bandung claim that their products have met the existing standards. However, those brands do not give any mechanical property data, including data on hardness. The ADA specification standard no. 15 requires a hardness of minimum 15.00 KHN for acrylic artificial teeth. The aim of this study is to find out which acrylic artificial teeth actually have a standardized hardness value. The study is an analytical descriptive study, which is performed on 5 brands of acrylic artificial teeth marketed in Bandung. From each brand, 4 teeth were sampled and receive 10 indentation spots on the upper and lower surfaces. It is concluded that the five acrylic artificial teeth brands have met the ADA specification standard no. 15 and there are differences in hardness values among the five brands.
Considerations before orthodontic camouflage treatment in skeletal class III malocclusion
Authors: Budhiawan Marcella , Anggani Haru Setyo
Published: October 2017

Skeletal Class III malocclusions are caused by maxillary deficiency, mandibular protrusion, or a combination of the two. This patient, in this case, may have a sunken in face, strong chin appearance. Most persons with Class III malocclusions, which is a dentofacial deformity, show combinations of skeletal and dentoalveolar components. Orthodontic therapy is usually aimed at compensating for the underlying mild-moderate skeletal Class III discrepancy and patients with severe skeletal Class III discrepancies require a combination of orthodontic treatment and orthognathic surgery to correct the underlying skeletal pattern. By considering many factors, the orthodontic treatment can be done on mild to severe skeletal Class III. These factors are facial profile, dental relationship and skeletal pattern. Those factors should be considered a starting point in making a treatment decision. They give the limitation of orthodontic treatment in terms of whether the occlusion could be corrected, or whether the deformity could be camouflage.
Adverse effects of fluoride towards thyroid hormone metabolism
Authors: MZ Enggar Abdullah Idris , Wihardja Rosiliwati
Published: October 2017

An easily ionized fluoride compound like Sodium Fluoride (NaF) has been used thus far as a dental caries prevention substance. However, fluoride ions also have a negative effect because it is very toxic. Several types of research on the effect of fluoride on guinea pigs and human beings indicate the presence synthesis obstruction of T3 and T4 that causes declined production, known as hypothyroidism. Hypothyroidism condition may obstruct tissue growth process and metabolism so as to impact various body organ systems. Preventive efforts against hypothyroidism caused by fluoride include avoiding diffusible fluoride compound intake, like NaF, in a long run systemic use, whereas efforts to overcome fluoride intoxication include consuming food that is rich in calcium, vitamin D, and antioxidant.
Dental and oral management in beta major thalassemia in children
Authors: Riyanti Eriska
Published: October 2017

Thalassemia beta major is a hereditary hemolytic anemia disease with various grades of severity, which can be found with no or less globin chain qualitative synthesis. The patient often experiences hepatosplenomegaly, growth retardation and bone disorder and the thalassemia facies/chipmunk face appearance. The orofacial manifestations of beta thalassemia major are prominent cheekbones and protrusive premaxillae due to erythroid hyperplasia with the depressed bridge of the nose. The dentition shows protrusion, flaring and spacing of the maxillary anterior teeth, open bite that leads to malocclusion. The anemic condition makes the patient is difficult to do all oral hygiene instruction thus caries index will increase. Dental practitioners especially pediatric dentists are required to have awareness towards the nature of the disease and its implication on dental care. Collaboration with haematologist has to be made in every dental treatment.
Mastication force analysis on the fulcrum point of first class lever on lower jaw distal free end denture
Authors: Ardan Rachman
Published: October 2017

The problem in first-class free end lever (distal extension base) Removable Partial Denture (RPD) is the lever force on the retention point that may harm the abutment tooth which has been discussed many times, but the amount of force on the fulcrum point (rest) on the abutment tooth has never discussed yet. The objective of this paper is to analyze the amount of force on the fulcrum point in the first class lever of lower free end denture on the two dimension static models. The analysis result reveals that the force on the fulcrum point is bigger than the mastication force on the free end saddle, or the force on the fulcrum point is equal to the sum of the force of the saddle and the force on the retention point. The force on the fulcrum point may cause trauma to the periodontal tissue of the abutment tooth. To decrease the amount of force on the fulcrum point is by mastication force limitation, decreasing the distance between the mastication point and the fulcrum point; and increasing the distance between retention point and fulcrum point. For clinical application, there are many biological variables to be considered.
Is it herpes or aphthae lesions?
Authors: Sufiawati Irna , Pradono Siti Aliyah
Published: October 2017

Is it herpes or aphthae lesions?
Infection and microleakage the caused of endodontic failure
Authors: Achiar Kurniasri Amas , Subrata Gantini
Published: October 2017

The success of endodontic treatment depends on the quality of endodontic treatment and the final restoration. The mean reason for endodontic treatment failure is usually microleakage. That is why it becomes one of the priorities for dental research to prevent microleakage. Infection during the root canal treatment can be prevented. First, by employing strict aseptic clinical techniques follows by cleaning all bacteria and preoperative necrotic pulp-tissue remnants from the root canal. Irrigants are essential in this phase. The shaping of the canal is also an important prerequisite for endodontic success. Removal of the smear layer can enhance seal ability. Second, obturation of the root canal should leave the tooth in the most biological inert condition possible, and it must prevent reinfection as well as the growth of any microorganisms remaining in the canal. The application of an antibacterial dressing between appointments is absolutely necessary or the root canal has to be obturated at the first appointment in order to deprive the microorganisms of nutrients and space to multiply. The temporary filling must be at least 3.5 mm thick. Failure occurs because of missed canals, iatrogenic events and radicular fractures have to be avoided. At the end, clinicians have to confirm that the root canal is cleaned and hermetically obturated because hermetic root canal filling will prevent the leakage of an irritant to the apical area.
The effectiveness of paint remover to resin adhesive residue on base mesh of metal bracket
Authors: Abubakar Sukarto , Thahar Bergman , Hambali Tono S. , Salim Jono
Published: October 2017

The purpose of this study is to know whether paint remover can be used to remove resin adhesive residue on the base mesh of metal bracket. The study is based on in vitro experiment with descriptive-comparative and the test sample is 30 used brackets after treatment at Orthodontic Specialist Clinic Faculty of Dentistry Universitas Padjadjaran. The sample is randomly divided into 3 groups and each group consists of 10 brackets and then its bath in paint remover for 8, 10, and 12 hours, respectively and statistically analyzed with chi-square (χ2) and α= 0.05 and the results show signifi cantly diff erence between resin residue before and after immersion, while resin residue after immersion its group showed there are no signifi cant diff erences. Based on analyzed, it can be concluded that paint remover can be used to remove resin adhesive residue on base mesh of metal bracket and that 8, 10, and 12 hours immersion duration the result show effectiveness similiary.
Soft tissue profile analysis using Ioi’s method for dentoalveolar bimaxillary protrusion cases before and after treatment with extractions of four first premolars
Authors: Ziliwu Yuliana , Hambali Tono S. , Salim Jono , Mardiati Endah
Published: October 2017

The purpose of this study is to measure the soft tissue profile changes before and after treatment of dento-alveolar bimaxillary protrusion cases which had orthodontic treatment including extraction of upper and lower first premolars. Iori's soft tissue analysis used in this study and cephalometric analysis on 14 patients wich fulfilled sample criteria was performed. Four angular and two linear measurements were done manually utilizing protractor. Statistical analysis was paired t-test. The result showed significant changes in soft tissue after the treatment.
The changes of soft tissue profile in skeletal class II patients with mandibular retrognathy treated by the extraction of maxillary first premolars
Authors: Hendri H. , Hambali Tono S. , Salim Jono , Mardiati Endah
Published: October 2017

The purpose of this research is to measure the change of soft tissue profile, both anteroposteriorly as well as vertically in skeletal class II patients with mandibular retrognathy cases, treated with extraction of the maxillary first premolars. Pre and post treatment result of 16 patient treated with the Standard Edgewise fixed appliance were compared using a Canon D646u series scanner and Corel Draw 12 computer programme, utilizing the TVL line as a plane of orientation. The result was analyzed with a paired t-test. Statistical analysis shows significant anteroposterior and vertical soft tissue changes in facial profile in skeletal class II patients with mandibular retrognathy treated with extraction of maxillary first premolars using the Standard Edgewise fixed appliance, measured with the STCA-VTL method.
Dental arch symmetry analysis in orthodontic treatment
Authors: Kurniawan Irsan , Soeria Soemantri Eky Setiawan , Evangelina Ida Ayu
Published: October 2017

The aims of this study were to introduce fixed symmetrograph as a device to analyze arch symmetry and to compare the result of arch symmetry measurements using such appliance with commonly used symmetrograph in Faculty of Dentistry Padjadjaran Universitas (Orthocross). Twenty based study models used in this study. The method used in this study was by comparing the result of measurement using orthocross with the result of measurements using fixed symmetrograph. The result of this study revealed there was no significant difference between measurement using orthocross with measurement using fixed symmetrograph (P>0,05). Based on the result of this study, it is recommended to use this fixed symmetrograph, because there were several advantages using this device, for example, symmetrograph’s midlines superimpose exactly with study model’s midlines with the aid of two vertical pins. Even more, the study model can be fixated using two fixators so that the study model and fixed symmetrograph were not moving during measurement.
Bond strength test of acrylic artificial teeth with prosthetic base
Authors: Kurnikasari Erna , Mahmud Muslich , Dziab Hasna
Published: October 2017

Denture consists of acrylic artificial teeth and acrylic prothesis base bond chemically with a bond strength of 315 kgF/cm2. Most of the commercial acrylic artificial teeth do not specify their specifications and all of those acrylic artificial teeth do not include mechanical data (bond strength). The aim of this study is to discover which acrylic artificial teeth meet ADA specification no. 15. This study is a descriptive analytic study performed to 5 acrylic artificial teeth posterior brands commonly used by dentists and technicians. From each brand, 3 sample teeth were taken. The acrylic artificial teeth were prepared into a rectangular shape and were attached between acrylic prothesis base simulation and jigs. The sample was given tensile load using a Universal Testing Machine. The amount of force that causes the teeth to be fractured was recorded and the bond strength was calculated. The results of the study show that the average value for the five acrylic artificial teeth for the five brands were as followed: Brand A, 125.993 kgF/cm2; B, 188.457 kgF/cm2; C, 175.880 kgF/cm2; D, 153.373 kgF/cm2; E, 82.839 kgF/cm2. The data can be tested statistically by using One Way ANOVA test and Dunnett test (alpha = 0.05). From the study, it is concluded that the five acrylic artificial teeth have a bond strength below the ADA specification no. 15.
Immunoexpression of cytokeratin 19 in oral cavity mucous smear of filter cigarette smokers
Authors: Meira Isra , Widyaputra Sunardhi , Dardjan Murnisari
Published: October 2017

Smoking has become general habits in social life. One popular kind is filtered cigarette. As the base component is tobacco without clove and separated by the filter on it. Long irritation from heat and a toxic component of cigarette changed in oral mucosa epithelial. This condition can stimulate the increase of progenitor cells, which is marked by immunohistochemistry staining method of cytokeratin 19. This descriptive study is to find the expression of cytokeratin 19 in oral mucosa cytoplasm epithelial of filter cigarette smokers. There were 30 smokers which were selected with certain criteria. Samples were taken from a cytological smear of mucosa epithelial then stained with immunohistochemistry method. Analysis has taken by calculating the number of cells in the cytological smear. Then the immunoexpression of cytokeratin 19 was known from the percentage of cytoplasm cells which have brown colour compared with a total number of cells. In conclusion, the smoking filter cigarette would increase the number of progenitor cells from chronic inflammation, which is marked by cytokeratin 19 expression in oral mucosa cytoplasm epithelial of smokers.
The differences in Hg content released from high copper amalgam and silverfil argentum restoration into artificial saliva after one week of soaking (in vitro)
Authors: Wisuardy Deriz Rieskanoerbachra , Sukartini Endang , Armilia Milly
Published: October 2017

Dental restoration is a treatment in dentistry that very often implemented. One of the restoration materials used is an amalgam. Amalgam has some deficiencies, among others, the presence of free Hg. The purpose of this study was to find out the difference in Hg content released from two different kinds of amalgam, namely, high copper amalgam and silverfil argentum carried out in vitro. This study was carried out on thirty premolar teeth of the maxilla which underwent class one occlusal restoration. The Hg content released was measured using the Atomic Absorption Spectrophotometry (AAS). This was a quasi-experimental study. The study results analyzed using the independent t paired statistical test method indicated that after one week of immersion, the average Hg content released from high copper amalgam restoration was 10,695 ng/mL and from silverfil argentum restoration was 5,602 ng/mL. The conclusion of the study was that there was a difference in Hg content released from high copper amalgam restoration and silverfil argentum restoration. The Hg content released from high copper amalgam restoration was higher than the Hg content released from silverfil argentum restoration.
Minimum inhibition concentration and anti-fungal contact time of quaternary ammonium and ethylenediaminetetraacetic acid (EDTA) mixture towards Candida Albicans isolate
Authors: Yunita Elizabeth , Hardjawinata Karlina , Dewi Warta
Published: October 2017

The aim of this study is to determine the Minimum Inhibitory Concentration (MIC) and the exposure time of the combination of quaternary ammonium compound with EDTA towards Candida albicans isolates from the 5 upper acrylic removable complete dentures. This experimental laboratory study was conducted based on a serial dilution of the combination of quaternary ammonium compound with EDTA towards Candida albicans in 3 replications and statistically analyzed according to Kruskal-Wallis method. The result showed that the MIC of the combination of quaternary ammonium compound with EDTA towards Candida albicans was in 1/8000 concentration with minimum 8 hours exposure time. This study concluded that the combination of quaternary ammonium compound with EDTA had an antifungal activity towards Candida albicans at 1/8000 concentration in 8 hours exposure time.
Immunodetection of EGF-receptor, C-erbB oncogenes and HSV-1 antigene in oral mucosal swab preparation from Kretek (Clove cigarette) smokers
Authors: Kintawati Silvi
Published: October 2017

Smoking is the biggest factor for oral cavity malignancy. An oral cavity mucous swab was performed to 30 smokers (mild, moderate and severe) and 10 non-smokers which were followed by immunocytochemistry smear using the antibody for EGF-R, c-erbB, and HSV-1 antigens to reveal the effect of smoking on the occurrence of oral cavity malignancy. The results from this experiment are analyzed statistically using one-way Anava. It is discovered that based on the assessment of the expression level towards EGF-R, and C-erbB oncogene there is a very significant difference between the smoker group and non-smoker group (p < 0.01). Meanwhile, the results from the assessment towards HSV-1 oncogene do not show significant differences between the smoker group (mild, moderate and severe) and the non-smoker group (p > 0.05). The results of this study show that the more a person smokes, the higher possibility of oral cavity malignancy and that the antibody for EGF-R and c-erbB can be used as a marker for early detection of oral cavity malignancy caused by smoking.
The effect of oral habits in the oral cavity of children and its treatment
Authors: Gartika Meirina
Published: October 2017

Oral habits include habit which is continuously done and has the potential to cause defects in teeth and perioral tissues. Some of the oral habits are finger/thumb sucking, lip sucking/biting, nail biting, bruxism, abnormal swallowing and mouth breathing. The etiology of oral habits includes the disharmonious relationship between parents and children, dissatisfaction in oral phase, premature weaning, emotional disturbance, anomaly, and diseases. Oral habits will influence the development of occlusion and perioral structures in children in the growing and development process. The treatment of oral habits can be done with or without appliances. The non-appliance treatment consists of psychological approach, medical approach and myofunctional therapy while the appliance treatment will include the use of orthodontic appliances.
Family dental health care service
Authors: Wardani Riana
Published: October 2017

The Family Dental Health Care Service is a new approach that includes efforts to serve oral and dental patients that focuses on maintenance, improvement and protection. This oral and dental health approach uses basic dentistry science and technology. The vision of the Family Dental Health Care Service is the family independences in the effort of dental health maintenance and to achieve the highest oral and dental health degree as possible through family dentist care that is efficient, effective, fair, evenly distributed, safe and has a good quality. To support this effort, the Ministry of Health has issued Health Care Policy and Implementation Guideline as well as the licensing standard for family dentist practice.
Endodontic treatment failure caused by arsen utilization as the devitalization material
Authors: Sukartini Endang , Darliana Kurniasri
Published: October 2017

Root canal treatment diagnoses as pulpitis irreversible can be treated in a non-vital condition with devitalization material. Arsenic is one of devitalization material that used in inflammatory pulp tissue before it is going to endodontic treatment. The long-term use of it or the leak of using this arsenic can cause the toxic effect of the pulp tissue. The case is going to report is about the damage of gingival tissue and alveolar that caused by the uncarefullness using of arsenic. Inappropriate arsenic applications cause the leak that able to spread to gingival tissue and will become necrosis. Now a day, the using of arsenic begin to leave because of the toxicity sad effect. This report is going to report how much the damage using arsenic trioxide (As2O3) and the effort from the leakness.
An OCL-Based Framework for Model Transformations
Authors: Dang Duc-Hanh , Gogolla Martin
Published: October 2017

Model transformation is an important building block for model-driven approaches. It puts forward a necessity and a challenge to specify and realize model transformation as well as to ensure the correctness of transformations. This paper proposes an OCL-based framework for model transformations. The formal foundation of the framework is the integration of Triple Graph Grammars and the Object Constraint Language (OCL). The OCL-based transformation framework offers an on-the-fly verification of model transformations and means for transformation quality assurance.
Improving performance of the asynchronous cooperative relay networks with maximum ratio combining and transmit antenna selection technique
Authors: Nghiep Tran The
Published: October 2017

In this paper, a new amplify and forward (AF) asynchronous cooperative relay networks using maximum ratio combining (MRC) and transmit antenna selection (TAS) technique is considered. In order to obtain a maximal received diversity gain, the received signal vectors of all antennas of the each relay node are jointly combined by MRC technique in the first phase. Then, only one the selected antenna of each relay will amplify and retransmit the resulting MRC signal vectors to the destination node in the second transmission step of network. The proposed scheme not only offers to reduce the interference components induced by inter-symbol interference (ISI) among the relay nodes, but also can effectively remove them with employment near-optimum detection (NOD) at the destination node as compared with the previous distributed close loop extended-orthogonal space time block code (DCL EO-STBC) scheme. The analysis and simulation results confirm that the new scheme outperforms the previous cooperative relay networks in both synchronous and asynchronous conditions. Moreover, the proposed scheme allows to reduce the requirement of the Radio-Frequency (RF) chains at the relay nodes and is extended to general multi-antenna relay network without decreasing transmission rate.
High-Efficiency High-Gain 2.4 GHz Class-B Power Amplifiers in 0.13 µm CMOS for Wireless Communications
Authors: Vu Tuan Anh , Pham Tuan Dinh , Bach Duong Gia
Published: October 2017

This paper presents high-efficiency high-gain 2.4 GHz power amplifiers (PAs) for wireless communications. Two class-B PAs are designed and verified in 0.13 µm CMOS mixed-signal/RF process provided by TSMC. The PAs employs cascode topologies with wideband multi-stage matchings. The single-stage cascode PA is designed for a high power added efficiency (PAE) of 35.4% while the gain is 20.4 dB over the -3 dB bandwidth between 2.4 GHz and 2.48 GHz. The two-stage cascode PA is targeted for a high gain of 37.7 dB while it exhibits a peak PAE of 24.1%. Supplied by 1.2 V supply voltages, the PAs consume DC powers of 4.5 mW and 9 mW, respectively.
A Model for Real-time Concurrent Interaction Protocols in Component Interfaces
Authors: Dang Hung Van
Published: October 2017

Interaction Protocol specification is an important part for component interface specification. To use a component, the environment must conform to the interaction protocol specified in the interface of the component. We give a powerful technique to specify protocols which can capture the constraints on temporal order, concurrency, and timing. We also show that the problem of checking if a timed automaton conforms to a given real-time protocol is decidable and develop a decision procedure for solving the problem.
A Feeding Network with Chebyshev Distribution for Designing Low Side-lobe Level Antenna Arrays
Authors: Tang Toan The , Nguyen Tran Minh , Truong Vu Bang Giang
Published: October 2017

This paper proposes a feeding networking to gain low sidelobe levels for microstrip linear antenna arrays. The procedure to design a feeding network using Chebyshev weighting method will be proposed and presented. As a demonstration, a feeding network for 8×1 elements linear array with Chebyshev distribution weights (preset sidelobe level of -25 dB) has been designed. An unequal T-junction power divider has been applied in designing the feeding network to guarantee the output powers the same as Chebyshev weights. The obtained results of the amplitudes at each output port have been validated with theory data. The phases of output signals are almost equal at all ports. The proposed feeding network, therefore, can be a good candidate for constructing a low sidelobe level linear array antenna.
A Novel Method Based on Two Different Thicknesses of The Sample for Determining Complex Permittivity of Materials Using Electromagnetic Wave Propagation in Free Space at X-Band
Authors: Ho manh Cuong , Vu van Yem
Published: October 2017

In this paper, we present a method for determining complex permittivity of materials using two different thicknesses of the sample placed in free space. The proposed method is based on the use of transmission having the same geometry with different thicknesses with the aim to determine the complex propagation constant (γ). The reflection and transmission coefficients (S11 and S21) of material samples are determined using a free-space measurement system. The system consists of transmit and receive horn antennas operating at X-band. The complex permittivity of materials is calculated from the values of γ, in turns received from S11 and S21. The proposed method is tested with different material samples in the frequency range of 8.0 – 12.0 GHz. The results show that the dielectric loss tangent of low-loss material samples, the more accuracy of complex permittivity. However, the complex permittivity is slightly effected by the dielectric loss tangent of high-loss of material samples.
Compact Triple-Band MIMO Antenna with High Isolation for Handheld Application
Authors: Duong Thanh Tu
Published: October 2017

A structure, the proposed MIMO antenna is compact in size and designed on FR4 substrate with total dimension of 37 x 43.6 x 6 m3. At first, a single PIFA antenna is presented using U-shaped slots in radiating patch which puts forward the antenna resonant in three frequencies: 2.4GHz, 3.5GHz and 6.3GHz with bandwidth of 8.87%, 18.29.% and 2.53 % respectively for Wi-Fi, Wimax/LTE and Direct Broadcast Satellite DBS of C channel applications. Good reflection coefficient, antenna gain, and radiation pattern characteristics are obtained in the frequency band of interest.  Secondly, the paper has put forward another single type of tri-band PIFA which uses double rectangular shape of Defected Ground Structure (DGS) technology. This helps increasing the antenna efficiency at all frequencies as well as enhancing antenna gain of the PIFA. Finally, a MIMO PIFA antenna is constructed by placing two single antennas side by side at close distance of 4 mm. The MIMO antenna also gets high gain and radiation efficiency at all frequencies. To reduce the mutual coupling between antenna elements, a combination of two “slot and variation” structures of DGS is proposed. Moreover, these DGS structures have enhanced MIMO antenna bandwidth at all three bands, especially at 3.5GHz resonant frequency.
Dependency-based Pre-ordering For English-Vietnamese Statistical Machine Translation
Authors: Viet Tran Hong , Huyen Vu Thuong , Vinh Nguyen Van , Minh Nguyen Le
Published: October 2017

Reordering is a major challenge in machine translation (MT) between two languages with significant differences in word order. In this paper, we present an approach as pre-processing step based on a dependency parser in phrase-based statistical machine translation (SMT) to learn automatic and manual reordering rules from English to Vietnamese. The dependency parse tree and transformation rules are used to reorder the source sentences and applied for systems translating English to Vietnamese. We evaluated our approach and compared on English-Vietnamese machine translation tasks, and showed that it outperforms the baseline phrase-based SMT system.
Implementasi Algoritma Fisher-Yates Untuk Mengacak Soal Ujian Online Penerimaan Mahasiswa Baru (Studi Kasus : Universitas Lancang Kuning Riau)
Authors: Hasan Mhd Arief , Supriadi Supriadi , Zamzami Zamzami
Published: October 2017

Ujian merupakan salah satu cara untuk mendapatkan hasil yang berguna untuk mengevaluasi proses pembelajaran dan mengukur taraf pencapaian suatu tujuan pengajaran. Universitas Lancang Kuning (UNILAK) Pekanbaru menggunakan CBT (Computer Based Test) dalam penerimaan mahasiswa baru. Dalam proses pelaksanaan ujian diperlukan sebuah algoritma yang memiliki metode yang menghasilkan permutasi acak sehingga dapat mengurangi kecurangan yang dilakukan oleh peserta ujian CBT.  Algoritma Fisher-Yates Shuffle adalah sebuah algoritma yang menghasilkan permutasi acak dari suatu himpunan terhingga, dengan kata lain untuk mengacak suatu himpunan tersebut. Jika di implementasikan dengan benar maka hasil dari algoritma ini tidak akan berat sebelah sehingga setiap permutasi memiliki kemungkinan yang sama. Proses yang dilakukan algoritma adalah memasukkan atribut soal kedalam scratch (daftar soal yang belum terpilih), lalu membuat  range (jumlah soal yang belum terpilih) kemudian dilakukan proses pengacakan, selanjutnya membentuk roll (untuk sebuah soal yang terpilih dari semua jumlah soal yang ada) kemudian hasil soal yang sudah terpilih dimasukkan kedalam result (hasil dari seluruh soal yang telah dilakukan pengacakan). Dari proses algoritma yang dilakukan mendapatkan hasil perubahan posisi atau urutan soal sehingga didapatkan bahwa setiap peserta ujian yang melakukan ujian pada saat waktu yang bersamaan mendapatkan bentuk soal yang berbeda.
Perancangan Aplikasi Bercocok Tanam Padi dan Cabe Kriting Berbasis Android
Authors: Harison Harison , Putri Mandarani , Daratul Wahida
Published: October 2017

The decline in the number of farmers poses a threat to the fulfillment of food self-sufficiency target in Indonesia, as well as the lack of agricultural extension staff. Utilization of information technology can help the problem of agriculture. Utilization of this farming application can help the beginners and farmers in managing their land because the application is equipped with stepping step video from the beginning of processing land to harvest and also accompanied by pest control on each plant. The method used waterfaal method, java programming language and MySqLite database. The results of this planting application is able to provide expert knowledge transfer to the farmers.
Que país queremos
Authors: Miranda José Américo
Published: October 2017

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Classificação de Veículos Híbridos - Evolução Crescente do Grau de Electrificação
Authors: Melo Pedro
Published: October 2017

Em resposta aos impactos ambientais e limitações dos combustíveis fósseis, assistiu-se nas últimas décadas a um acentuado desenvolvimento dos veículos híbridos elétricos convencionais. A sua proliferação encontra-se hoje bem disseminada, em praticamente todas as gamas, refletindo a confiança dos consumidores. Com vista a atenuar ainda mais o uso dos combustíveis fósseis, a tendência é de aumentar o nível de eletrificação nas versões híbridas mais recentes, bem como da oferta de versões puramente elétricas. No entanto, a evolução dos últimos anos, quer ao nível da aposta por parte dos fabricantes, quer ao nível do volume de vendas, parece indiciar uma nova fase de proliferação destes veículos, a qual se encontra ainda a dar os primeiros passos. Este artigo apresenta uma classificação dos veículos híbridos, em função do nível de eletrificação do sistema de propulsão. Após uma breve referência aos veículos puramente elétricos, fazem-se algumas considerações acerca do impacto mundial dos veículos híbridos Plug-in e puramente elétricos, nos últimos 5 anos.
Mobilidade Elétrica
Authors: Andrade António Carvalho de
Published: October 2017

No último século, a utilização de combustíveis fosseis permitiram uma acelerada industrialização intimamente associada a consumos crescentes de energia. Mas a sua utilização não é neutra do ponto de vista ambiental, pois liberta gases de efeito de estufa (GEE), que estão a alterar o equilíbrio da nossa atmosfera que existia no período préindustrial. Apoiado em estudos científicos cada vez mais credibilizados pela comunidade científica, o poder político está consciente das suas consequências climáticas, e por isso empenhado em mudar a matriz energética com vista a uma redução progressiva dos GEE.
PENGARUH METODE MIND MAPPING DAN KETERAMPILAN PROSES TERHADAP KEMAMPUAN PEMECAHAN MASALAH MATEMATIS MATA KULIAH STRUKTUR ALJABAR
Authors: Purwaningsih Dian
Published: October 2017

Rendahnya pemahaman konsep dan kemampuan bernalar serta kurangnya mahasiswa dalam berpikir secara logis dan sistematis menjadi faktor penyebab rendahnya kemampuan pemecahan masalah. Melalui pemecahan masalah ini aspek-aspek kemampuan matematika seperti penerapan aturan, penemuan pola, penggeneralisasian, komunikasi matematik dan lain-lain dapat dikembangkan secara baik. Mind Mapping merupakan salah satu metode yang dapat melihat hubungan antara satu ide dengan ide lainnya, ini sangat memudahkan otak untuk memahami dan menyerap suatu informasi karena cara kerjanya mirip dengan cara kerja koneksi di dalam otak. Metode mind mapping pada penelitian ini dibatasi pada keaktifan mahasiswa. Tujuan penelitian ini: (1) untuk mengetahui pengaruh metode mind mapping melalui pendekatan ketrampilan proses terhadap kemampuan pemecahan masalah, (2) untuk mengetahui pengaruh keaktifan mahasiswa terhadap kemampuan pemecahan masalah, (3) untuk mengetahui pengaruh metode mind mapping melalui pendekatan ketrampilan proses dan keaktifan mahasiswa terhadap kemampuan pemecahan masalah. Penelitian ini menggunakan metode eksperimen semu (quasi experiment) yaitu jenis penelitian yang mempunyai kelompok kontrol, tetapi tidak dapat berfungsisepenuhnya untuk mengontrol variable-variabel luar yang mempengaruhi peleksanaan eksperimen. Kata Kunci: Mind Mapping, kemampuan pemecahan masalah
PENINGKATAN KREATIVITAS REMAJA PUTUS SEKOLAH MELALUI PELATIHAN ENSAMBEL TALEMPONG RENJEANG ANAM SALABUHAN PADA KELOMPOK KESENIAN TUAH SAKATO DI NAGARI MATUA MUDIAK KABUPATEN AGAM
Authors: Sastra Andar Indar
Published: October 2017

Tujuan jangka panjang peningkatan kreativitas remaja putus sekolah melalui pelatihan ensambel talempong renjeang anam salabuhan adalah untuk memberdayakan potensi seni dalam kehidupan masyarakat di Nagari Matua Mudiak Kecamatan Matua. Target khusus yang ingin dicapai dalam kegiatan pelatihan  ini  adalah  penguasaan  ragam  guguah  talempong  yang  disajikan dalam bentuk ensambel. Bentuk ensambel itu terdiri dari seperangkat talempong, gandang tambua serta pupuik gadang (serunai batang padi). Metode yang digunakan dalam kegiatan pelatihan ini berupa wawancara, ceramah, diskusi dan demonstrasi. Wawancara menjadi dasar identivikasi prinsip-prinsip musikal berdasarkan pengetahuan empirik tuo (tetua) talempong. Metode ceramah digunakan untuk menyampaikan beberapa hal terkait   dengan   kiek   (teknik)   memegang   talempong,   teknik   memukul talempong, prinsip-prinsip musikal dan non musikal penyajian talempong, prinsip estetis ketika talempong disajikan, pola tabuhan gendang, dan sarunai. Diskusi lebih menitikberatkan pada komunikasi dua belah pihak, terutama berkaitan dengan prinsip musikal, dan capaian standar kualitas musikal, dan intensitas yang didasari ekspresi musikal dan non musikal. Demontrasi berorientasi pada peragaan langsung terkait dengan kiek, penguasaan materi musikal untuk setiap pasangan talempong, main bersama, pola tabuhan gandang tabua (gendang tambur), dan pupuik gadang (jenis serunai).
PEMBINAAN KREATIVITAS SENI TARI PADA SISWA SMPN 2 KOTA BUKITTINGGI
Authors: Nursyam Yesriva , Nasution Hendra , Yeni Fitri , Anggraini Nova
Published: October 2017

Pembinaan kreativitas seni tari pada siswa SMPN 2 Kota Bukittinggi dilaksanakan sebagai bentuk pengembangan kesenian khususnya seni tari. Sekolah ini perlu mendapat pembinaan karena minimnya pengetahuan dan apresiasi guru terhadap seni tari khususnya tari kreasi baru. Pembinaan ini dilaksanakan  melalui  beberapa  metode  yang  langsung  diterapkan  kepada siswa SMPN 2 Kota Bukittingi yang dimulai dari apresiasi melalui video- video tari kreasi, penjelasan mengenai teknik kepenarian, pemberian materi teknik secara langsung, memberikan ragam-ragam gerak, hingga penataan tari sampai menjadi sebuah karya tari kreasi baru. Melalui metode ini dapat membentuk kemampuan menari yang bagus pada siswa dalam menciptakan karya tari kreasi baru yang utuh dan diiringi musik pengiring tarian.
PELATIHAN MENDONGENG DAN BERCERITA BAGI PELAJAR DAN GURU SE- BUKITTINGGI
Authors: Zaitun Kurniasih , Surya Wirma , Mahendra Bayu , Saputra Deni
Published: October 2017

Mendongeng merupakan cerita yang tidak benar-benar terjadi (terutamakejadia zaman dulu yang aneh-aneh). Namun istilah dongeng saat ini juga berkembang menjadi bercerita, dimana maksudnya menuturkan cerita. Sudahsejak jaman dahulu kala, aktivitas mendongeng tidak hanya disukai oleh anak- anak, namun juga orang muda hingga yang sudah dewasa. Aktivitas ini dipercaya memiliki berjuta manfaat. Selain untuk member hiburan, juga menambah pengetahuan, dan memperkaya akhlak atau moral seseorang, terlebih anak-anak. Anak-anak adalah pribadi yang sangat membutuhkan banyak pelajaran dan pengalaman baru. Dengan media dongeng, anak seperti diajak berfantasi menuju alam imajinasi sambil meraup berjuta pengalaman baru. Dunia dongeng merupakan dunia yang menakjubkan terutama bagi anak-anak. Lewat sebuah dongeng sebuah komunikasi dan kedekatan emosional dapat tercapai. Transfer nilai-nilai yang terkandung dalam sebuah dongengan dapat lebih mudah dimengerti. Sayangnya masih banyak orang yang belum mengetahui teknik mendongeng yang baik, sehingga harapan positif dari kegiatan mendongeng menjadi sia-sia bahkan membosankan. Semua orang bisa menjadi pendongeng yang baik, terutama bagi kalangan pendidik baik di pendidikan formal maupun non formal. Mendongeng merupakan keterampilan berbahasa lisan yang bersifat produktif yang menjadi bagian dari keterampilan berbicara, jadi tidak ada alasan seorang guru tidak bisa mendongeng. Mendongeng dapat dijadikan media dalam proses kegiatan belajar. Sedangkan bagi orang tua, mendongeng untuk anak dapat mempererat komunikasi dengan si buah hati dan meningkatkan kedekatan batin emosional antara orang tua dan anak. Banyak orangtua terlalu sibuk dengan urusannya sehingga tidak mempunyai waktu untuk mendongeng atau kalaupun ada, tidak tahu bagaimana mendongeng yang baik.
PELATIHAN TARI PANYEMBRAMA SEBAGAI PENGENALAN BUDAYA BALI DI SMA NEGERI 2 PADANGPANJANG
Authors: Citrawati A.A. Istri Agung , Riyanti Eva , Anugraha Fathul , Mahyeni Helen Puti
Published: October 2017

Kegiatan Pengabdian Bagi Masyarakat berbasis Prodi ditujukan untukmelatih siswa-siswi SMAN 2 Padangpanjang dalam rangka pengenalan budaya Bali, dengan judul yang diusulkan adalah Pelatihan Tari Panyembrama Sebagai Pengenalan Budaya Bali di SMAN 2 Padangpanjang.Kegiatan ini bertujuan untuk memberikan, pengetahuan serta pengalaman tentang tari-tarian Nusantara khususnya tarian Bali (Tari Panyembrama) sehingga siswa-siswi SMAN 2 Padangpanjang mengenal tarian ini dan mampu menyajikan secara utuh sebagai pertunjukan tari, serta dapat di kembangkandan dijadikan sebagai materi pembelajaran untuk mata pelajaran seni budaya di sekolah SMA Negeri 2 Padangpanjang. Proses kegiatan tersebut diberikan dengan metode ceramah, demontrasi, dan evaluasi