Abstract Purpose: This study aims to analyze if, during periods of economic recession, the cash position impacts the performance of Brazilian companies. In addition, it seeks to identify if there are differences in the intensity of such relationships for the different sectors in which companies operate. Originality/value: The appropriate management of a company’s cash position is key for the maintenance of its financial health in the long term. This subject is particularly relevant for emerging countries, such as Brazil, considering the track record of frequent economic recessions. Such economic recessions lead to the deterioration of the companies’ operating results and shortage of credit facilities, negatively affecting the companies’ liquidity. In the last decade, studies have been discussing the relevance of the companies’ cash position to improve their performance in periods of financial constraint. Design/methodology/approach: To develop this study, a sample composed of 200 Brazilian companies listed on B3 was used, grouping information from the period between 2013 and 2016, organized in a balanced dynamic panel. Findings: The results obtained through regressions indicate that there is a positive and statistically significant relationship between cash position and the performance of the companies, measured by the return on assets (ROA) – but not by the market to book ratio –, and it was also identified that the sector in which the company operates has a moderating factor on the intensity of such a relationship.

Resumo Objetivo: O presente trabalho analisa se, em momentos de recessão econômica, a posição de caixa tem impacto na performance das empresas brasileiras. Além disso, busca-se identificar se há diferenças na intensidade dessa relação para os diferentes setores de atuação das empresas. Originalidade/valor: A adequada gestão da liquidez das empresas é fundamental para a manutenção da sua saúde financeira e para a sua sustentabilidade econômica em longo prazo. Esse tema é especialmente importante em países emergentes, como o Brasil, que tem um histórico de frequentes recessões econômicas. As recessões levam à piora dos resultados operacionais das empresas e à escassez de linhas de crédito e, portanto, afetam negativamente a liquidez das companhias. Na última década, tem sido discutida a importância do uso de caixa pelas empresas para melhorar sua performance em períodos de restrição financeira. Design/metodologia/abordagem: Para desenvolver este estudo, foi utilizada uma amostra de 200 empresas listadas na B3, agrupando informações do período de 2013 a 2016, organizadas em um painel dinâmico balanceado. Resultados: Os resultados obtidos por meio das regressões indicam que há relação positiva e estatisticamente significante entre a posição de caixa e a performance medida pelo ROA (mas não pelo market to book). Identificou-se também que o setor de atuação da empresa modera a intensidade dessa relação.

RESUMO Objetivo: Esta pesquisa foi baseada na hipótese do "trabalhador feliz, produtivo". O objetivo foi analisar as relações preditivas, por meio de abordagem multinível, entre as variáveis bem-estar no trabalho, justiça organizacional e suporte organizacional e a variável critério desempenho individual no trabalho. Originalidade/valor: O estudo multinível do desempenho no trabalho e suas relações com bem-estar e variáveis organizacionais ainda são uma lacuna atual na literatura, assim como a possibilidade de testar se o bem-estar no trabalho pode ser considerado um fenômeno coletivo. A presença do suporte organizacional no modelo, operacionalizado em nível de equipe, representa uma importante contribuição, assim como para o desenvolvimento de teorias voltadas para o papel das equipes nas organizações, especialmente seu impacto nas variáveis organizacionais. Design/metodologia/abordagem: Considerando a análise proposta em dois níveis diferentes, adotou-se um modelo multinível. A amostra final foi composta por 730 indivíduos e 32 unidades. Coletaram-se os dados por meio de questionário composto por quatro escalas previamente validadas. A análise dos dados seguiu as seis etapas propostas por Hox, Moerbeek e Schoot (2017) para modelos multiníveis para cada uma das amostras. Resultados: O modelo explicativo apresentou uma relação preditiva entre realização (fator de bem-estar no trabalho), operacionalizada como variável de nível individual, e desempenho individual do trabalho; relação preditiva entre justiça interacional, também operacionalizada como variável individual, e desempenho individual do trabalho; e relação preditiva entre as percepções coletivas de suporte organizacional, operacionalizada como variável de nível de equipe, e desempenho individual do trabalho.

ABSTRACT Purpose: This research was based on the "happy, productive worker" hypothesis. The objective was to analyze the predictive relationships, through a multilevel approach, between the variables well-being at work, organizational justice, organizational support, and the dependent variable individual job performance. Originality/value: The multilevel study of individual job performance and its relations with well-being and organizational variables are still a current gap in the literature, as well as the possibility of testing whether well-being at work can be considered a collective phenomenon. The presence of organizational support in the model, operationalized at the team level, represents an important contribution to the development of theories focused on teams' roles in organizations, especially their impact on organizational variables. Design/methodology/approach: Considering the proposed analysis at two different levels, a multilevel design model was adopted. The final sample consisted of 730 individuals and 32 units. The data were collected through a questionnaire composed of four previously validated scales. Data analysis followed the six steps proposed by Hox, Moerbeek, and Schoot (2017) for multilevel models for each of the samples. Findings: The explanatory model presented a predictive relationship between achievement (well-being at work factor), operationalized as an individual-level variable, and individual job performance; a predictive relationship between interactional justice, also operationalized as an individual-level variable, and individual job performance, and a predictive relationship between collective perceptions of organizational support, operationalized as a team-level variable, and individual job performance.

Siloxane-poly(methyl methacrylate) (PMMA) hybrid was synthesized based on the sol-gel method and applied to Ti-6Al-4V through dip-coating. The structural feature of the hybrid was subjected to Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TG); its morphological properties were analyzed through scanning electron microscope (SEM), energy dispersive spectrometry (EDS), atomic force microscopy (AFM) and contact angle. The electrochemical behavior and corrosion resistance of both the hybrid coating and the uncoated substrate were investigated based on electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET). Results showed homogeneous coating formation due to the rigid hybrid network formed during polymerization, hydrolysis and condensation reactions. This outcome suggested interaction between the organic (methyl methacrylate (MMA)) and inorganic (tetraethyl orthosilicate (TEOS)) phases, which was favored by the coupling agent (3-(trimethoxysilyl)propyl methacrylate (TMSM)). The S0M (PMMA-SiO2 hybrid Ti-6Al-4V coated alloy) film presented regular topography and adherence to the substrate. Electrochemical simulated body fluid (SBF) tests showed that the hybrid coating presented better barrier properties (168 h of the immersion time) than the uncoated substrate, fact that makes it an interesting material for anti-corrosive applications in biomaterials.

Resumo A pesquisa buscou identificar os núcleos temáticos das representações de bem-estar e mal-estar no trabalho de empregados de empresa pública brasileira. Os dados foram coletados por meio de questões abertas do Inventário de Avaliação de Qualidade de Vida no Trabalho. Participaram 5.833 trabalhadores: idade 46,7 (DP 11,61); sexo masculino (62%); casados (58,7%); curso superior (37,17%). Utilizou-se o aplicativo Análise Lexical do Contexto de um Conjunto de Segmentos de Textos (Alceste) no tratamento dos dados. Os resultados revelaram as principais fontes de mal-estar no trabalho (e.g. organização burocrática do trabalho, 25%) e de bem-estar no trabalho (e.g. importância e significado do trabalho, 24%). A gestão organizacional está na origem do mal-estar no trabalho e deve ser objeto das mudanças corporativas.

Abstract The present work aims to identify the thematic cores concerning employees’ representations of well-being and ill-being at work in a Brazilian public company. Data were collected using open-ended questions from the Quality of Work Life Assessment Questionnaire. 5,833 workers participated in the study and were predominantly male (62%), with a mean age of 46.7 (SD = 11.61), married (58.7%), and with higher education (37.17%). We used the software Alceste for data treatment. The results revealed that the main sources of ill-being at work was bureaucratic labor organization (25%) and of well-being at work was importance and meaningfulness of work (24%). Organizational management is at the origin of ill-being at work and must be the object of corporate changes.

RESUMO Os traumatismos cranioencefálicos que resultam em extensos edemas e ou hematomas normalmente, requerem tratamentos cirúrgicos por meio de uma retirada maior de porção óssea. Deste modo, a ausência do tecido ósseo implica na falta de proteção do tecido cerebral ou até mesmo comprometer a estética especialmente, quando localizadas na região frontal ou frontoparietal. O objetivo deste relato de caso é descrever uma opção de tratamento para os traumatismos cranioencefálicos, por meio da peça pré-fabricada mediante a obtenção do modelo do crânio. Estas falhas ósseas podem ser reconstruídas tanto pelo método direto utilizando o polimetilmetacrilato diretamente sobre as falhas ou por meio das peças pré-confeccionadas como a prototipagem ou a partir do modelo do crânio. Embora outras técnicas apresentem muitos pontos positivos, algumas mostram determinados inconvenientes, desde condição de armazenamento abaixo da gordura abdominal, aquecimento prévio devido a liberação de calor durante a reação de alto polimerização ou o alto custo quando são prototipadas. A técnica neste trabalho descrita relata sua facilidade de execução, elimina o risco do aquecimento local, permite a prévia esterilização em autoclave, é biocompatível, permite a perfeita recuperação anatômica, fácil colocação, baixo custo, ressaltando ainda a vantagem da atuação do cirurgião bucomaxilofacial devido sua familiarização com os procedimentos pertinentes a cabeça e pescoço. Em exame clínico e tomográfico após 24 meses do tratamento, observa-se estabilidade da placa de polimetilmetacrilato, aderências às margens ósseas, e ausência de alterações tissulares.

ABSTRACT Cranioencephalic trauma which results in extensive edema and / or bruising usually requires surgical treatment through a greater withdrawal of the bone portion. Thus, the absence of bone tissue implies the lack of protection of the brain tissue or even compromises the esthetics especially when located in the frontal or frontoparietal region. The purpose of this case report is to describe a treatment option for head trauma, through the prefabricated part by obtaining the skull model. These bone faults can be reconstructed either by the direct method using polymethylmethacrylate directly on the defects or by means of pre-made pieces such as prototyping or from the skull model. Although other techniques have many good points, some show certain drawbacks, from storage conditions below abdominal fat, preheating due to the release of heat during the high polymerization reaction or the high cost when they are prototyped. The technique described in this work reports its simple performance, eliminating the risk of local heating, allows prior sterilization in autoclave, it is biocompatible, allows perfect anatomical recovery, easy placement, low cost, also highlighs the advantage of the bucomaxillofacial surgeon's performance due to the familiarization with the relevant head and neck procedures. Clinical and tomographic examination after 24 months of treatment showed stability of the polymethylmethacrylate plate, adhesions to the bone margins, and absence of tissue alterations.

OBJETIVO: Averiguar o valor que os reumatologistas brasileiros conferem ao exame de ultrassonografia para o diagnóstico de tendinite e ao exame de eletroneuromiografia para o diagnóstico da neuropatia periférica e da radiculopatia dos membros superiores. MATERIAL E MÉTODOS: No total, 165 reumatologistas responderam a uma pesquisa de opinião anônima (enviada pela internet), sobre diversas situações relativas aos dois exames, no que diz respeito aos seguintes questionamentos: confiabilidade, precisão no diagnóstico, importância e necessidade desses exames para confirmação diagnóstica e credibilidade e treinamento dos profissionais que executam os exames. RESULTADOS: O estudo revelou que a maioria dos reumatologistas reconhece que esses exames são operador-dependentes, que não confia integralmente nos resultados observados, que tais exames não são imperativos para os diagnósticos elencados, e que os profissionais que executam esses exames deveriam ser mais bem treinados para fornecer resultados mais confiantes. CONCLUSÃO: Para os reumatologistas brasileiros, os resultados desses exames devem ser interpretados com cautela e não são definitivos para o diagnóstico; a ultrassonografia musculoesquelética e a eletroneuromiografia devem ser realizadas por profissionais capacitados; deve haver melhor preparo dos executores desses exames em nosso meio.

OBJECTIVE: To ascertain the value ascribed by Brazilian rheumatologists to ultrasonography (US) for diagnosing tendinitis and to electromyography (EMG) for diagnosing peripheral neuropathy and upper limb radiculopathy. MATERIAL AND METHODS: In total, 165 rheumatologists answered an anonymous survey (sent via the internet) concerning the two exams, with respect to the following characteristics: reliability, diagnostic accuracy, the importance and necessity of these tests for diagnostic RESULTS: The study revealed that most of the rheumatologists recognised that these exams are operator-dependent, that clinicians do not rely entirely on the results, that these exams are not mandatory for the diagnoses listed, and that professionals who perform these exams should be better trained to provide reliable results. CONCLUSIONS: The Brazilian rheumatologists believe the following: the results of these exams should be interpreted with caution and are not definitive for diagnosis; musculoskeletal US and EMG should be performed by trained professionals; and there must be better preparation of the professionals who perform these exams.

Objective. To present the clinical and radiologic features and surgical results in the management of dermal and epidermal cysts treated in our Institution between 1997 and 2006, Material and method. Age, sex, way of presentation, location, radiologic features, surgical technique and complications of 15 epidermal and 1 dermal tumors diagnosed between may 1997 and october 2006, were retrospectively assessed. Results. Mean age: 43 yrs. Most frequent clinical manifestation: headache. Most tumors were at CPA. All resections were done with microsurgical technique. There were 3 cases of chemical meningitis that resolve without sequel. Discussion. Dermal and epidermal cysts are originated by inclusion of ectodermic material at the moment of occlussion of the neural tube. They represent the 0,3 - 1,5% of intracranial tumors beeng dermal 5-9 times less frequent. The most frequent location of epidermal cysts is at the CPA while dermal are more frequent in the midline. Clinical fatures depend on location. MRI is the gold standard for diagnosis, specially the DWI sequence. CT is important for the detection of bone invasion. Treatement is so extensive as possible surgical resection, difficult, sometimes because of strong adhesions to eloquent structures. Conclusion. Dermal and epidermal cysts are high fat content lesions, that produce edherence to neural structures. Surgical excision is the election tratement.

Objective: to present our experience in the management of olfactory groove meningiomas analysing their clinical presentation, radiological features, surgical outcomes and postoperative complications. Methods: a retrospective study was conducted by analysing the charts of the patients including surgical records, imaging studies and histopatological records. Results: a total of 304 meningiomas were operated on between 1994-2007 in our department. There were 16 patients with olfactory groove meningiomas including 9 women and 7 men. A mean age of 52,8 yr (age range 21-72 yr). The most frequent symptom was a higher function impairment ( 5 pt). Olfactory simptoms were infrequent in our series. The average maximum tumoral diameter was 5,8 cm. The approaches used were the subfrontal, bifrontal craniotomy with orbital osteotomy, pterional and frontolateral. CSF fistula was the most frequent complication. Perioperative mortality was recorded in two cases. No relation with surgery was demostrated. The mean follow-up period was 78 months. Conclusion: the olfactory groove meningiomas reaches a big size due to delay in diagnosis. The best treatment is the surgical excision with a surgical approach wich provides quick access to the tumor with the lesser morbimortality possible.