bluuebunny/crossref_metadata_2025 huggingface dataset:
Kinetic study of propane aromatization over Zn/HZSM-5 zeolite under conditions of catalyst deactivation using genetic algorithm
Authors: Roshanaei Abbas , Alavi Mehdi
Published: January 2018

The kinetic studies of propane aromatization reaction over Zn/ /HZSM-5 catalyst at temperature of 500?560?C and space velocity of 500?2500 cm3 gcat -1 h-1, in a plug flow reactor, under catalyst deactivating conditions were performed. A lumped kinetic model consisting of six lumped components and six reaction steps was proposed to describe the aromatization of propane. The kinetic model involves 18 kinetic parameters and one catalyst deactivation constant. The reaction steps orders were obtained by the power law model. Frequency factors and the apparent activation energies of the reaction steps were calculated based on the Arrhenius equation. An exponential function depending on the time-on-stream was applied for the catalyst deactivation model and the kinetic parameters were calculated via a genetic algorithm. The kinetic results indicated that the lumped kinetic model can well estimate the product yields of propane aromatization.
Influence of the aerosol flow and exposure time on the structural changes in the filtering half masks material
Authors: Ivankovic Negovan , Rajic Dusan , Karkalic Radovan , Jankovic Dusan , Radovanovic Zeljko , Stupar Stevan , Jankovic Darko
Published: January 2018

The flow of air and aerosol particles through the filtering half masks material depends on the structure porosity. It is very difficult to determine the behaviour of the filtering material during the process of extraction and retention of aerosols. The samples of five filtering half mask models were used in this investigation. Dynamics of the aerosol filtration through the filtering materials was tested using a method for testing the leakage of aerosol particles through the filtering material and a method for testing the inhalation resistance of filtering material, both specified in the SRPS EN 149:2013. Recording of the structural changes in the samples of the tested materials was carried out by the technique of scanning electron microscopy. The experiments showed a deviation of the results in relation to the theory of filtration the finely dispersed submicron sized particles. It was concluded that the aerosol leakage through the filtering half masks and their resistance to aerosol flow change depend on the aerosol flow rates and the on filtration process duration, as a direct consequence of the newly-made changes in the structure of the filtering material and due to reversibility effect between the filtration process and the changes in the filtering material.
DFT calculation, biological activity, anion sensing studies and crystal structure of (E)-4-chloro-2-((pyridin-2-ylimino)-methyl)phenol
Authors: Yildirim Nuray , Demir Neslihan , Alpaslan Gökhan , Boyacioğlu Bahadir , Yildiz Mustafa , Ünver Hüseyin
Published: January 2018

(E)-4-Chloro-2-[(pyridin-2-ylimino)methyl]phenol was synthesized in the reaction of 2-aminopyridine with 5-chlorosalicylaldehyde. The structure of compound was investigated by FTIR, UV?Vis, 1H-NMR, 13C-NMR and X-ray data. In addition, characterization of the compound was realized using theoretical quantum mechanical calculations and experimental spectroscopic methods. The molecular structure of the compound was confirmed using X-ray single-crystal data, NMR, FTIR and UV?Vis, which were in good agreement with the structure predicted by the theoretical calculations using the density functional theory (DFT). Moreover, the antimicrobial activity of the compound was investigated against some bacteria and yeast cultures by the broth microdilution test. UV?Vis spectroscopy studies of the interactions between the Schiff base and calf thymus DNA (CT-DNA) showed that the compound interacts with CT-DNA via electrostatic binding. The colorimetric response of the compound receptors was investigated before and after the addition of an equivalent amount of each anion to evaluate anion recognition properties.
Oxidation of propene from air by atmospheric plasma-catalytic hybrid system
Authors: Pham Thien , Bui Ha , Khacef Ahmed
Published: January 2018

The pulsed dielectric barrier discharge (DBD) combined with the palladium supported on alumina beads, was investigated for propene (C3H6) removal from air. The effects of thermal-catalysis, plasma-catalysis (in-plasma catalysis and post-plasma catalysis), and plasma-alone on the propene removal were compared. Results are presented in the terms of C3H6 removal efficiency, energy consumption, and by-products production. Temperature dependence studies (20?250?C) show that in all conditions of input plasma energy density explored (23?148 J L-1), the plasma-catalysis systems exhibit better propene conversion efficiencies than the thermal catalysis at low temperature (60% at 20?C). Plasma-alone treatment has a similar effectiveness compared to plasma-catalysis at room temperature, but it leads to the formation of high by-products concentrations. It appears that in the plasma-catalyst system, C3H6 removal was the most efficient, whatever was the configuration used, and it was helpful to minimize by-products formation.
Lenders' Experience with Borrowers' Major Customers and the Debt Contracting Demand for Accounting Conservatism
Authors: Gong Guojin , Luo Shuqing
Published: January 2018

Lenders often have lending relationships with borrowers' major customers (labeled as “supply-chain lenders”). We hypothesize that private information obtained from borrowers' major customers can facilitate more timely and precise evaluation of borrowers' creditworthiness; this potentially reduces supply-chain lenders' reliance on accounting conservatism in debt contracting. Consistently, we find that suppliers borrowing from supply-chain lenders provide less conservative financial statements than suppliers borrowing from non-supply-chain lenders at loan origination. This finding is more pronounced when supply-chain lenders are likely to have greater information advantage over non-supply-chain lenders. Based on latent factors that proxy for private information accessible from customers, we find that supply-chain lenders' information advantage relates to customers' future operational and financial risks. Further, in lending agreements, supply-chain lenders accept fewer accounting-based contractual terms, lower spreads, and longer loan maturity than non-supply-chain lenders. The overall evidence suggests that borrowers' major customers represent an important information channel that enables lenders to more effectively screen and monitor borrowers, thus weakening the debt contracting demand for accounting conservatism.
The Effects of Generalized Trust and Civic Cooperation on the Big N Presence and Audit Fees Across the Globe
Authors: Knechel W. Robert , Mintchik Natalia , Pevzner Mikhail , Velury Uma
Published: January 2018

We examine the impact of country-level generalized trust and civic cooperation (i.e., societal trust) on Big N auditor choice and audit fees. Because higher societal trust countries are associated with lower levels of agency problems, we expect a negative association between societal trust and Big N auditor choice and audit fees. We find this to be the case in countries with strong investor protection, i.e., a substitution effect. However, because higher trust societies may also experience higher costs of inappropriate behavior and place higher value on a strong audit function, we could observe a positive association between societal trust and Big N audit demand or audit fees. We find this to be the case in countries with weaker investor protection, i.e., a complementary effect. These results suggest that both formal institutions (audit, investor protection) and informal attitudes (trust, civic cooperation) can influence the demand and supply for audit services.
Did the 2005 Deferred Prosecution Agreement Adversely Impact KPMG's Audit Practice?
Authors: Baugh Matthew , Boone Jeff P. , Khurana Inder K. , Raman K. K.
Published: January 2018

We examine the consequences of misconduct in a Big 4 firm's nonaudit practice for its audit practice. Specifically, we examine whether KPMG's audit practice suffered a loss of audit fees and clients and/or a decline in factual audit quality following the 2005 deferred prosecution agreement (DPA) with the Department of Justice for marketing questionable tax shelters. We find little evidence that the DPA adversely impacted KPMG's audit practice by way of either audit fees or the likelihood of client gains/losses, suggesting little or no harm to KPMG's audit reputation. We also find that the DPA had no effect on the firm's factual audit quality, even for those audit clients that dropped KPMG as their tax service provider. Collectively, our findings suggest that there was no spillover effect from the DPA to KPMG's audit practice.

Data Availability: All data are publicly available.
Do Banks Audited by Specialists Engage in Less Real Activities Management? Evidence from Repurchase Agreements
Authors: Fargher Neil L. , Hou Wenxuan , Zhang John Ziyang
Published: January 2018

Prior research documents that nonfinancial firms resort to more real activities management when their ability to manage accruals is constrained by specialist auditors (e.g., Chi, Lisic, and Pevzner 2011; Burnett, Cripe, Martin, and McAllister 2012). Within the context of banks' real activities management through repurchase agreements (repos), we argue that repo management can increase litigation risk for auditors and, hence, specialist auditors will pay greater attention to repo management and will better constrain the extent of such real activities management than non-specialists. We find that banks audited by specialists, including both Big 4 and non-Big 4 specialists, are associated with less downward repo deviation than banks audited by non-Big 4 non-specialists. We also find that banks audited by the joint national and city-level specialists are associated with less downward repo deviation than banks audited by Big 4 non-specialists.
The Elaboration Likelihood Model: A Meta-Theory for Synthesizing Auditor Judgment and Decision-Making Research
Authors: Griffith Emily E. , Nolder Christine J. , Petty Richard E.
Published: January 2018

Critics argue that audit research rarely impacts practice, in part due to challenges associated with synthesizing and interpreting research. We propose that using the Elaboration Likelihood Model (ELM) as a meta-theoretical framework can help in understanding the collective findings within auditor judgment and decision-making (JDM) research. Our goal is to demonstrate the utility of the ELM by interpreting the results of two samples of studies on client cooperation and auditors' moods. Our synthesis of client cooperation studies suggests cooperation on a current issue affects auditors' judgments only when auditors lack motivation to think carefully about the task. In contrast, a history of client cooperation tends to bias even highly motivated auditors' judgments. Our synthesis of mood studies suggests motivational interventions are necessary, but not sufficient, to mitigate mood's effects on judgments. Our ELM interpretations offer theoretical explanations for seemingly unrelated predictions and findings that can inform future research and practice.
Tax-Related Corporate Political Activity Research: A Literature Review
Authors: Barrick John A. , Brown Jennifer L.
Published: January 2018

Academic researchers and the public have long shared an interest in whether and how corporate political activity (CPA) relates to taxes and tax policy. This paper reviews the literature on tax-related CPA. We frame our discussion around three main questions: (1) Which firms are likely to engage in tax-related CPA? (2) What do firms expect to gain from participating in politics? And (3) how do firms achieve their political goals? We highlight contributions made by prior studies and identify themes to guide future research. We also provide detailed information on available data and resources for interested researchers.

JEL Classifications: H25; H32.
Using MTurk to Distribute a Survey or Experiment: Methodological Considerations
Authors: Hunt Nicholas C. , Scheetz Andrea M.
Published: January 2018

Amazon Mechanical Turk (MTurk) is a powerful tool that is more commonly being used to recruit behavioral research participants for accounting research. This manuscript provides practical and technical knowledge learned from firsthand experience to help researchers collect high-quality, defendable data for research purposes. We highlight two issues of particular importance when using MTurk: (1) accessing qualified participants, and (2) validating collected data. To address these issues, we discuss alternative methods of carrying out screens and different data validation techniques researchers may want to consider. We also demonstrate how some of the techniques discussed were implemented for a recent data collection. Finally, we contrast the use of unpaid screens with merely putting participation requirements in the MTurk instructions to examine the effectiveness of using screens. We find that screening questions significantly reduce the number of manipulation check failures as well as significantly increase the usable responses per paid participant.
Management Control of New Product Development and Perceived Environmental Uncertainty: Exploring Heterogeneity Using a Finite Mixture Approach
Authors: Janka Marc , Guenther Thomas W.
Published: January 2018

Results regarding the association between perceived environmental uncertainty (PEU) and management control (MC) of new product development (NPD) are ambiguous and sometimes contradictory. Based on survey data for 276 firms, we first contribute to MC research by finding that firms have two completely different responses regarding their MC of NPD when facing high PEU. Whereas the first group of firms increases all MCs when PEU increases, the second group responds with a loosening of MC. The first group consists of slightly larger and older firms than the second group, with relatively emergent innovation strategies, greater innovation capabilities, and weaker perceived complexity of their environment. Second, we reveal these two contrary groups of firms behind an aggregated sample by introducing finite mixture partial least squares (FIMIX-PLS) as a new approach to MC research. Our study may inspire future researchers to control for previously unobserved heterogeneity in structural models by using FIMIX-PLS.

JEL Classifications: D81; L60; M11; M40; O32.
Accruals, Managerial Operating Decisions, and Firm Growth: Implications for Tests of Earnings Management
Authors: Liu Michelle
Published: January 2018

One of the most crucial yet controversial issues in executive performance evaluation is disentangling which managerial decisions reflect firms' economic position versus opportunistic earnings management. I explore this issue and find that specific managerial policies often used by growing firms are likely to be identified as upward earnings management by widely used annual accrual expectation models. I find that incorporating linear and nonlinear growth measures (for various assets and a growth factor) into these models increases the explanatory power by 1.01 percent to 9.86 percent. Models with asset growth, receivables growth, and a growth factor generate the lowest Type I error rates, while models with asset growth, operating cycle, and a growth factor generate the lowest Type II error rates. In reexamined tests of upward earnings management around IPOs, inferences change after controlling for growth. I make empirical suggestions to help distinguish growth from opportunism in tests of earnings management.
Features of the histological structure of trophoblast and chorionic villi with recurrent pregnancy loss in women with thrombophilias
Authors: Mirov A. I. , Kharkevich O. N. , Golofast O. E. , Glukhovets I. B.
Published: January 2018

The frequency of recurrent pregnancy loss does not tend to decrease. This pathology continues to be one of the important problems of modern medicine. It is known that thrombophilia can play a significant role in the etiology of spontaneous reproductive losses. However, the pathogenesis of recurrent spontaneous loss of pregnancy in the presence of maternal thrombophilia is not fully understood.
Aim. To identify the features of the histological structure of trophoblasts and chorionic villi in the first trimester of pregnancy in women with thrombophilia and recurrent pregnancy loss, with careful exclusion of other possible causes of fetal loss syndrome.
Material and Methods. Histological examination of 49 chorion tissue samples from 24 patients with thrombophilia and recurrent pregnancy loss in the first trimester (study group) was performed. The controls were samples of chorion tissue taken during artificial abortion in 33 healthy women who had a history of 2 or more spontaneous labor without significant complications. Thrombophilia diagnosis and hemostasis system state evaluation was performed for all patients on the basis of analysis of 30 parameters according to standard methods. All studies were conducted at the Regional clinical hospital № 8 in Ryazan as well as the scientific and clinical center of hematology, oncology and immunology of the Ryazan State Medical University named after academician I.P. Pavlov of Health Ministry of the Russian Federation. Statistical processing of the obtained results was carried out with the help of computer program package Statistica (version 10).
Results. Significant differences in the histological structure of trophoblast and chorionic villi in the studied women were revealed, in comparison with those in the control group. It is proved that the presence of thrombophilia negatively affects the process of embryogenesis and contributes to a significant reduction in the area of the chorionic villus vessels in the first trimester of pregnancy.
Conclusion. It is proved that the presence of thrombophilia has a negative effect on the process of embryogenesis and significantly reduces the vascular area of chorionic villi that can probably play a significant role in the pathogenesis of recurrent pregnancy loss.
Surgical correction of functional disorders in performing sphincterosafing operations for rectal cancer (literature review)
Authors: Kulikov E. P. , Kaminsky Yu. D. , Klevcova S. V.
Published: January 2018

For many decades the main goal of oncologists was to increase life expectancy of patients with malignant tumors, without paying due attention to quality of life. Currently, the goals of patients’ treatment with rectal cancer are to cure, to minimize the risk of local recurrence, preserve the normal course of intestine, to optimize it's function and to ensure quality of life. For a long time, the standard surgical treatment of patients with low rectal cancer was abdominoperineal extirpation, but recently sphincterosafing operations have seen a widespread introduction in surgical practice. However, functional results after these types of operations don't always meet the expectations of surgeons and patients. In the postoperative period, patients often develop a syndrome of low anterior resection, characterized by frequent bowel movements, repeated, prolonged and incomplete evacuation of bowel and the imperative urge to defecate. The manifestation of this syndrome can significantly impair the quality of patient's life and reduce to nothing the efforts of the surgeon to preserve the sphincter of the rectum. For surgical correction of low anterior resection syndrome, various types of colonic reservoir anastomoses have been proposed. The purpose of formation of colonic reservoirs is to increase the cumulative function of intestine. However, the existing methods have several disadvantages related to technical complications and the risk of developing evacuation dysfunction, which is the reason for search the new ways of optimization of anastomoses when performing sphincterotomy operations for cancer of the rectum.
The use of plasmapheresis and intravenous laser blood irradiation in treatment of patients with newly diagnosed tuberculosis at the late stages of hiv infection (references review)
Authors: Polyakov A. A. , Kornilova Z. H. , Demikhova O. V.
Published: January 2018

This article presents an overview of the current domestic and foreign literature on the problems of treatment of newly diagnosed tuberculosis in patients with late stages of HIV infection. The urgency of the problem, peculiarities of the clinical course and treatment of tuberculosis, the principles of antiretroviral therapy in the combination of tuberculosis and HIV infection are considered. It has been established that long-term chronic (или “long term” или “chronic”) tuberculosis intoxication, as well as aggressive antituberculosis therapy, lead to disruption of metabolic processes, hypercatabolism, intoxication, and development of hypercoagulable syndrome. At the same time, data is provided on the toxic effects of antiretroviral therapy. Treatment of adverse reactions begins with detoxification and antihistamine therapy followed by the addition of vitamin therapy, antioxidants, antihypoxants, hepatoprotectors, anabolic agents, and enterosorbents. Various methods of pathogenetic therapy are of great interest, including extracorporal hemocorrection (plasmapheresis) and intravenous laser irradiation of blood (ILIB). Plasmapheresis (PA) allows the effective and short time normalization of homeostasis indices as well as reduction or elimination of intoxication effects, toxic and allergic reactions, hence increasing the effectiveness of basic therapy. Course of PA in patients with common forms of tuberculosis (3-5 procedures, with an interval of 2-3 days, removal of 20-25% of the volume of circulating plasma and replacement with crystalloid solutions in combination with hydroxyethyl starches) allows the elimination of symptoms of intoxication, increases tolerance of the organism to chemotherapy, and suppresses undesirable side effects. The method of quantum therapy (ILIB) is based on the effect of quantum energy on blood directly in the vascular bed. As the result photo biological influence of ILIB, all body systems are activated to correct the existing disorders. This is manifested to a great extent in tissues suffering from oxygen deficiency, since it is in these areas the metabolism increases and the processes of tissue reparation are activated. ILID helps for activation of white blood cell function, phagocytosis, synthesis of antibodies, interferon, and in general, improves the immune status.
Cultura, Mídia e Direitos Humanos
Authors: Da Silva Santos Marco Antonio , Bilate Janaína , Pinheiro da Silva Lucas , Conde Fernanda , Olímpio Laís
Published: January 2018

Este trabalho é o resultado do Projeto de Pesquisa e Extensão Cultura, Mídia e Direitos Humanos, que visa contribuir com o estímulo de ações educativas na temática direitos humanos, bem como assessorar e estimular ações políticas coletivas no âmbito da pressão pelo acesso a direitos.  Intentou-se descortinar sobre e desenvolver processos de potencialização da consciência crítica e emancipatórios, visando o acesso a direitos e a educação em direitos humanos através de estímulos culturais.
A selva invade Lima: representações amazônicas na capital
Authors: Rosa Bibiana De Almeida
Published: January 2018

Este artigo é resultado da minha pesquisa de mestrado, “El Poder Verde de la Cumbia: a Amazônia em discos”, que tem como objetivo geral compreender as relações entre a cumbia amazônica e a indústria musical peruana na formação de representações sobre a Amazônia. A Cumbia, cuja origem é colombiana, é um gênero musical muito capilarizado na América Latina, apresentando especificidades de acordo com o país, região ou locais sociais nos quais se territorializou. É, portanto, exemplo de transnacionalização da música – sendo hoje um gênero representativo da América Latina. No Peru, sua recepção foi ampla – desde a década de 1960 conquistou espaço e se misturou com outros ritmos locais desde a capital até as cidades amazônicas. Neste artigo, exploro de que modo conceitos como “música local”; “transnacionalização”; “diversidade” e “desterritorialização” podem me ajudar a pensar os processos de representação e formação identitária da região Amazônica a partir da cumbia - em relação às indústrias musicais e em contextos de mundialização da cultura.
A Ponte da Amizade selando as relações Brasil-Paraguai
Authors: Mascarenhas Milena Costa
Published: January 2018

Este trabalho visa compreender melhor as relações internacionais entre os governos do Brasil e do Paraguai, a partir da década 50 com a ascensão do general Stroessner ao governo do Paraguai, via golpe de Estado, e a consolidação de novas diretrizes do Estado em relação aos seus vizinhos no Cone Sul, em particular ao Brasil. A construção da Ponte Internacional da Amizade, símbolo da geopolítica brasileira e paraguaia, materializou as intenções políticas, econômicas, sociais e culturais do Brasil e do Paraguai, e ao mesmo tempo, trouxe dúvidas, questionamentos, resistências e críticas.
Uso del servicio en la nube GeoGebra durante el proceso enseñanza-aprendizaje sobre las matemáticas / Use of the GeoGebra cloud service during the teaching-learning process on mathematics
Authors: Salas Rueda Ricardo Adán
Published: January 2018

Las universidades tienen la oportunidad de modificar las estrategias didácticas y los métodos educativos a través de las Tecnologías de Información y Comunicación (TIC). En particular, el servicio en la nube está transformando la interacción entre los participantes del proceso de enseñanza-aprendizaje en el siglo XXI debido a que el acceso, el almacenamiento y la distribución de la información se realizan desde cualquier lugar. Además, los estudiantes no necesitan instalar ningún programa en las computadoras y los dispositivos móviles para utilizar el servicio en la nube. El propósito de esta investigación cuantitativa es analizar el impacto del servicio en la nube GeoGebra en la Unidad didáctica Desigualdades lineales. La muestra está compuesta por 78 estudiantes que cursaron la asignatura Matemáticas intermedias para los negocios durante los ciclos escolares 2017, 2016 y 2015. El grupo experimental (31 alumnos) realizó cuatro prácticas de laboratorio sobre los temas de Desigualdad lineal, Sistema de desigualdades lineales, Función objetivo y Aplicaciones de las desigualdades por medio del servicio en la nube GeoGebra. Los resultados obtenidos permiten afirmar que GeoGebra es una aplicación útil y fácil para graficar las funciones, identificar las regiones y coordenadas en la gráfica, reconocer la región solución y asimilar el conocimiento sobre los temas del álgebra. Incluso, los estudiantes están satisfechos de utilizar esta herramienta tecnológica en la Unidad didáctica Desigualdades lineales. Asimismo, el método ANOVA con los niveles de significancia 0.05 y 0.03 confirma que el servicio en la nube GeoGebra mejora el rendimiento académico de los estudiantes. En conclusión, GeoGebra representa una herramienta innovadora, creativa y útil para el área de las matemáticas.
Direct composite restoration of permanent anterior teeth uncomplicated crown fractures
Authors: Nicholas Ashley Evans , Andang Milly Armilia , Hidayat Opik Taofik
Published: January 2018

An uncomplicated crown fracture is a fracture that involves only the tooth enamel or the dentin and tooth enamel without any damage or exposure to the pulp. Crown fracture of the anterior teeth usually caused by traumatic forces such as falls, accidents, violence, or sports activities. Traumatic injuries of the oral region frequently involve the anterior teeth, especially maxillary incisors due to the anatomic factors which may affect the functional and aesthetical values of the teeth. The objective of this literature study was to know more about uncomplicated crown fracture of the anterior teeth and its restoration. This research was a literature study performed by researching, highlighting various interesting facts and compiling the relevant published journals. The most common and ideal direct restoration of the anterior teeth was the composite resin restoration. The anterior teeth restoration was considered to be a complex and challenging case to solves due to the fact that besides reconstructing the tooth and regaining the function, the aesthetical aspect was also becoming the main objectives. The permanent anterior teeth uncomplicated crown fracture was the most common case of tooth fractures which was mainly caused by traumatic injuries such as falls, accidents, excessive forces, violence, and also sports activities. Dental injuries of the anterior teeth also affected the aesthetical properties and the function of the tooth. Composite resin restoration was able to performed directly on the permanent anterior teeth uncomplicated crown fracture.
The measurement of the alveolar bone crest in aggressive periodontitis using Cone Beam Computed Tomography imaging
Authors: Lestari Astia Dwiputri , Azhari Azhari , Wendari Sri
Published: January 2018

The normal alveolar bone crest located at a distance of 1 to 2 mm from CEJ towards the apical. If there is a bone loss, the alveolar bone crest located at 2 mm more to the apical from CEJ. The alveolar bone loss is one characteristic of aggressive periodontitis and the onset of the disease at the age of puberty. The purpose of this research was to know and to assess the height of alveolar bone crest using Cone Beam Computed Tomography (CBCT) in patients with aggressive periodontitis. The type of this research was descriptive. A total of 317 sample CBCT imagery from 6 aggressive periodontitis patients. The result of this research showed that average height of alveolar bone crest second premolar distal, the first molar mesial, first molar distal and second molar mesial on the first region were 3 mm, 4.2 mm, 6.1 mm, and 4.8 mm respectively. On the second region were 3.2 mm, 3.6 mm, 3.6 mm, and 3.4 mm respectively, and in the third region were 2.4 mm, 2.8 mm, 2.5 mm dan 1.4 mm consecutively. While in the fourth region were 2.9 mm, 3 mm, 2.8 mm, and 2.3 mm respectively. The average height of alveolar bone crest of aggressive periodontitis was 3.8 mm. Slicing CBCT imagery on coronal view for the anterior region and sagittal view for the posterior region, showed the characteristic of height alveolar bone crest was arch-shaped which showed the different height of alveolar bone crest of the second premolar distal until second molar mesial.
The implementation of chairside talk regarding plaque control instruction by Periodontics Residents
Authors: Rafisa Anggun , Yubiliana Gilang , Setiawan Asty Samiaty
Published: January 2018

The effort to educate patients regarding oral health maintenance can be performed through the chairside-talk. The purpose of this study was to observe the chairside-talk implementation regarding the plaque control instruction by Periodontics Residents of the Periodontics Clinic Faculty of Dentistry Universitas Padjadjaran Dental Hospital, Bandung, Indonesia. This study was a descriptive study with a survey technique. All data were collected using a checklist sheet. The results showed that 100% of residents were performing chairside-talk about plaque control instruction. As much as 86.3% from all residents performed the way of communication based on the literature’s recommendation, 81.67% preferred to teach the patient about toothbrushing directly, and 78.64% gave a direct plaque control instruction. All residents were performing the chairside-talk regarding the plaque control instructions, where the majority of them were performing the way of communication by literature recommendation, and the rest were preferred a direct toothbrushing teaching and plaque control instruction.
Gingival condition of patient with obesity
Authors: Alyani Atikah Sabrina , Wendari Sri , Hadidjah Dede
Published: January 2018

The prevalence of obesity has increased drastically in most developed countries. Many studies showed that obesity associated with oral diseases, especially periodontal disease. A recent study showed the relation between WC and periodontal disease counted by gingival index (GI). However, studies regarding the mechanism of the relationship between obesity and periodontal disease are still quite a few, whereas many studies conducted suggested that obesity was a medical problem. The study was aimed to know and assess the gingival condition of obese people who visited the Dental Polyclinic of Hasan Sadikin Hospital. The type of this study was descriptive with the survey technique. A total of 54 people consisted of 35 female and 19 male patients with the age range of 20-49 years old, and not using any dental prosthesis or orthodontic appliance. This study was using a questionnaire and clinical examination to assess the condition of the gingival using the Löe and Silness Gingival index (GI). Examination of obesity conducted by measuring the waist circumference with criteria from WHO. The average value of the gingival index was 1.22. Meanwhile, the average value of the waist circumference (WC) was 95.89 cm and 107.74 cm consecutively for female and male. The majority of obese patients suffered moderate gingivitis.
Relationship between oral hygiene and gingival condition of Malaysian students
Authors: Marsin Muhammad Arif Mohd , Rusyanti Yanti , Hendiani Ina
Published: January 2018

The primary etiologic agent of gingival disease was dental plaque which also involving the oral hygiene. The oral hygiene can be affected by individuals knowledge, attitude, practice, environment, and others. The purpose of this study was to assess the relationship between oral hygiene and gingival condition of Malaysian students. The type of this study was cross-sectional study. The study was conducted on a total of 66 Malaysian students. The data were collected by using an examination form and clinical examination using the Loe & Sillness gingival index followed by the Loe & Sillness plaque index. The results showed that 100% of students have gingivitis with the gingival index average of 1.25 and the plaque index average of 1.85. The relationship of gingival and plaque index was analyzed by using Spearman’s Rank Correlation Coefficient test, and the score was 0.623. It is concluded that the oral hygiene status of Malaysian students was in the fair category, and all Malaysian students had a moderate gingivitis. Also, there was a relationship between the oral hygiene status and gingival condition of Malaysian students.
Correlation between the distance of maxillary central incisors and incisive papilla in different arch form
Authors: Mohd Zali Nur Ateyya Natasha , Rikmasari Rasmi , Dziab Hasna
Published: January 2018

In edentulous treatment, relocation of anterior teeth in the preexisting natural position is the utmost importance. It is necessary to refer to the significant anatomical landmarks, one of them is incisive papilla. To make it more efficient both functionally and biologically, the teeth were arranged in particular geometric manner known as a dental arch. The author has chosen to conducted the research among the Malay race represented by the Malay undergraduate students. The purpose of this study was to evaluate the correlation between the distance of maxillary central incisors and incisive papilla (CI-IP) in different arch form and gender. Maxillary impressions of 34 dentate individuals were taken, and the measurements were performed using a digital caliper. The results showed the CI-IP distance was ranging between 7.65 to 9.90 mm, with the average of 8.77 mm. There was no significant difference of the CI-IP distance between male and female regardless of their arch forms (p>0.05). Individuals with ovoid and tapered arch form, however, showed a significant difference of the CI-IP distance between male and female (p<0.05). Meanwhile, Individuals with square arch form showed no significant difference of the CI-IP distance between male and female (p>0.05). It can be concluded that gender factor was irrelevant towards the CI-IP distance regardless of the individual arch form. However, there was a correlation between the CI-IP distance in different arch forms in both male and female sample.
Description of odontogenic infection cases at the Oral Surgery Polyclinic of Hasan Sadikin Hospital Bandung, Indonesia
Authors: Savitri Ravitha , Karasutisna Tis , Nurwiadh Agus
Published: January 2018

One of the most difficult cases to be managed in dentistry is an odontogenic infection. The study was aimed to finding the description of the odontogenic infection cases at the Oral Surgery Polyclinic of Hasan Sadikin Hospital, Bandung, Indonesia, according to the odontogenic infection types, genders, ages, sources of infection, and type of treatment given. This study was a retrospective-descriptive study with a survey method conducted from January 2009 to December 2010. The results of this study showed that there were total 8 types of odontogenic infection cases. The periapical abscess was the most frequent abscess found in 89 patients (30.6%). Male patients were having more often cases than women with the ratio of 53:47. The most frequent age group was the 21-30 years old age group in 57 patients (22.7%). The highest number of patients from 8 different cases of odontogenic infection (30.2%). The source of odontogenic infection was found most commonly by the mandibular first molar teeth, with as much as 26.6%.
Compliance evaluation of removable space maintainer or space regainer usage
Authors: Ramadhani Revanti , Hidayat Syarief , Primarti Risti Saptarini
Published: January 2018

Premature loss could cause a problem with the tooth arrangement or the dental arch size. A space left by the primary tooth loss could cause migration of the adjacent teeth. As a result, space will be narrowed and undermined the eruption of the permanent teeth. The success of the space maintainer or space regainer usage due to the premature loss marked by space for the replacement of the permanent teeth. The purpose of this research was to evaluate the compliance of children in wearing a space maintainer or space regainer after insertion at Pedodontics Installation of Faculty of Dentistry Universitas Padjadjaran Dental Hospital, Bandung, Indonesia. The research method was descriptive survey technique. The sample consisted of 30 patients selected using the total sampling technique. Data were obtained with a questionnaire and statistically analyzed. The results showed that majority of the children uses the removable space maintainer or the space regainer daily was only about 23,3% overall. Most of the children only use the removable space maintainer or the space regainer for sometimes. The research concluded that the low rate of pedodontic patients compliance at Pedodontics Installation of Faculty of Dentistry Universitas Padjadjaran Dental Hospital in the usage of the removable space maintainer or the space regainer was usually caused by pain or discomfort. This fact was evidence of a low awareness of parents in preventing malocclusion to their children.
Surface roughness comparison of methacrylate and silorane-based composite resins after 40% hydrogen peroxide application
Authors: Sasmita Rori , Adang Rahmi Alma Farah , Hidayat Opik Taofik
Published: January 2018

The change of the tooth colour could be restored with bleaching. The tooth bleaching will affects the surface roughness of the composite resins. Recently, the material basis for composite resins has developed, among others are methacrylate-based and silorane based composite resins. The objective of this study was to distinguish the surface roughness value of methacrylate-based composite resin and silorane based composite resins. This research was quasi-experimental. The sample used in this study were methacrylate and silorane based composite resins in discs form, with the size of 6 mm and the thickness of 3 mm, manufactured into 20 specimens and divided into 2 groups. The control group was immersed in the artificial saliva, and the treatment group was applied with 40% hydrogen peroxide. The result of the experiment analyzed using unpaired sample t-test showed significant differences in the average value of the surface roughness after the application of 40% hydrogen peroxide. The average value of methacrylate and silorane based composite resins were 2.744 μm and 3.417 μm, respectively. There was a difference in the surface roughness of methacrylate and silorane based composite resin compounds after the application of 40% hydrogen peroxide. The surface roughness value of the silorane-based composite resin was higher than the methacrylate-based.
Differences in the tooth whitening effect between strawberry juice and apple juice in-vitro
Authors: Stephanie Stephanie , Hayati Ayu Trisna , Sukartini Endang
Published: January 2018

Bleaching is the tooth whitening by applying chemical materials oxidizing the organic tooth pigmentation and creating smaller and lighter molecules. Commonly used in the tooth bleaching is hydrogen peroxide. Strawberry and apple contain hydrogen peroxide and ellagic acid which will bond with an unsaturated bond of the tooth pigmentation. The purpose of this research was to finding out and measuring the tooth whitening level and effectivity between the strawberry and apple juice. The type of this research was a true experimental (in-vitro), using 30 samples of maxillary premolars with cutted radicular until the CEJ. Samples were divided into 3 groups (immersed in strawberry juice; apple juice; and mineral water); with three times daily immersion in one week. The tooth colour level was measured using a spectrophotometer. Data were analyzed using the one-way ANOVA and LSD test. The results showed significant differences among all groups. Normality test showed the variance between homogenous groups, with the p-value of 0.198 (p ≥ 0.05). The one-way ANOVA test results showed a significance value (0.000), indicated a significant degree of the tooth whitening level between all groups. The LSD test results showed that the tooth whitening level in group I (immersed in strawberry juice) was significantly different to group II (immersed in apple juice) and group III (immersed in mineral water), with a significance value of 0.01 and 0.00 ( p ≤ 0.05). The tooth whitening level in group II was significantly different from group III, with a significance value of 0.03 (p ≤ 0.05). There were differences in the tooth whitening level between immersion in strawberry juice, apple juice, and mineral water, with the most effective tooth whitening level found in the strawberry juice immersion.
Evaluation of the mummification treatment at Conservative Dentistry Clinics
Authors: Rahmawati Ayunda Dwi , Nasserie Wazillah , Adang Rahmi Alma Farah
Published: January 2018

Indonesia is one of many developing countries with high caries prevalence which needs more attention regarding the countermeasures as well as the preventive treatment. Dental problems or pulp injury was able to treated with an endodontic procedure such as pulpotomy. The success of the mummification treatment was able to evaluated through subjective and objective examinations. The purpose of this study was to describe an evaluation of the mummification treatment at Conservative Dentistry Clinics of Faculty of Dentistry Universitas Padjadjaran by examining the condition of the teeth that have received mummification treatment. This study was a descriptive study with purposive sampling technique. The number of samples was as much as 38 teeth from patients who have completed mummification treatment. The results showed the success of mummification treatment was as much as 67% in less than three months, 44% in the range of time 3-6 months, and 29% in more than 6 months. The conclusion of this study was the mummification treatment success at Conservative Dentistry Clinics of Faculty of Dentistry Universitas Padjadjaran was high in less than three months and decreasing in more than six months after treatment.
Ante la crisis más capitalismo
Authors: Moreno Urbaneja Juan Antonio
Published: January 2018

el único efecto positivo de esta dramática crisis será darnos cuenta de que el socialismo fagocitario del dinero ajeno nos ha dejado sin recursos para reaccionar, y eso daña sobre todo a los más pobres. Ahora es un buen momento para optar de una vez por el capitalismo que nos hace más ricos y más libres
El destino común de la economía y la teoría: de su origen y su epílogo
Authors: Rojas Jiménez Alejandro
Published: January 2018

En este trabajo se comenta el paso del Neolítico a las civilizaciones antiguas rastreando la relación esencial entre el nacimiento de la economía de producción y el origen de las ciencias, vinculando finalmente la crisis de las ciencias europeas con la crisis de la economía cuando,  devaluada la actitud emancipadora propia de la economía de producción, la teoría queda desasistida de su sentido real que es liberar del mundo de medios pensando más allá de lo posible
La crisis de valores: Nietzsche y Lewis
Authors: García Briones Paloma , Benítez Hidalgo María Jesús
Published: January 2018

en este trabajo, tutorizado por el Dr. Juan José Padial Benticuaga, Paloma García Briones y María Benítez Hidalgo analizan dos vías distintas y opuestas en las que puede derivar la crisis de los valores: el nihilismo y el auge de la importancia de la afección subjetiva.
Esbozo histórico acerca de la pregunta por la verdad
Authors: Rojas Jiménez Alejandro
Published: January 2018

Como breve estudio preliminar que busca servir de preludio a unasjornadas que analizarán la cuestión por la verdad en los grandes textos de la historia de la filosofía, quizás sea pertinente un esbozo históricointroductorio que prepare a los oyentes no ya tanto a una sucesión derespuestas, sino al diálogo teórico por entender el sentido de loverdadero.
Una teoría anarquista del conocimiento
Authors: García Carpintero Gabriel
Published: January 2018

El anarquismo epistemológico de Feyerabend niega la existencia de unúnico método para dar con el conocimiento científico. En su lugar, afirmala existencia de muchas vías de acceso al conocimiento verdadero. Peroademás, el anarquismo epistemológico afirma que sometiéndonosestrictamente a las reglas de la ciencia, no seremos capaces de descubrir nada nuevo, dado que la ciencia es un proceso creativo y «anárquico» donde los opresivos principios racionales impuestos, son principalmente un estorbo en la búsqueda de la verdad. En conclusión, lo que realmente subyace al anarquismo epistemológico es: la idea que John Preston acertadamente ha venido a llamar «pluralismo metodológico», y una crítica a la epistemología normativa en favor de la descriptiva.
De la Transformation der Philosophie y la recuperación de una comprensión del consenso ligada a la experiencia originaria del diálogo platónico-socrático
Authors: Rojas Jiménez Alejandro
Published: January 2018

el presente trabajo se desarrolla en torno a cuatro grandes bloques:1. hay una relación inseparable hay entre consenso y filosofía, 2. en la edad moderna se consolida una peculiar comprensión del consenso que supone una ruptura con el modo en el que se venía entendiendo el quehacer filosófico, 3. podemos distinguir una distinta comprensión del consenso con base en los diálogos socrático-platónicos, y, 4. la recuperación de dicha comprensión del consenso una vez que entra en crisis la visión moderna del mismo da lugar a una Transformationder Philosophie ligada a aquella experiencia originaria del diálogo filosófico
El problema de la finalidad en la naturaleza
Authors: Rodríguez Prieto Sylvia Susana
Published: January 2018

El Juicio de gusto como Juicio estético parte de la contemplación de un objeto en particular. Surge de forma libre y no guarda relación alguna con una intencionalidad por parte del sujeto. En el caso de un juicio sobre lo bello se considera que atribuye cierta belleza al objeto como si se tratase de una propiedad que le caracteriza. La forma en la que se da este juicio posibilita el surgimiento de cierta universalidad del mismo en la medida en que todo aquel que pueda contemplarlo pueda distinguir la belleza en él. Pero se trata sólo de universalidad estética y no lógica. En la forma que adoptan estos objetos se advierte una finalidad de la naturaleza como condición a priori que posibilita su conocimiento. Dicha posibilidad basada en la reflexión sobre la forma de estos  viene determinada por el uso reflexionante de la facultad de juzgar.