Humanization knowledge of undergraduate nursing students.
PMID: 27280564 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Freitas FD, Ferreira MA Tags: Rev Bras Enferm Source Type: research

Direct cost of dressings for pressure ulcers in hospitalized patients.
PMID: 27280565 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Lima AF, Castilho V, Baptista CM, Rogenski NM, Rogenski KE Tags: Rev Bras Enferm Source Type: research

Social network of adolescents under probation from the perspective of public health.
PMID: 27280566 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Nunes MR, Ferriani MD, Malta DC, Oliveira WA, Silva MA Tags: Rev Bras Enferm Source Type: research

Nursing diagnoses in intensive care: cross-mapping and NANDA-I taxonomy.
PMID: 27280567 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Ferreira AM, Rocha ED, Lopes CT, Bachion MM, Lopes JL, Barros AL Tags: Rev Bras Enferm Source Type: research

Nursing instrument to attend mothers who recently gave birth in primary health care.
PMID: 27280568 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Mazzo MH, Brito RS Tags: Rev Bras Enferm Source Type: research

Family farming and human and environmental health conservation.
PMID: 27280569 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Borges AM, Bonow CA, Silva MR, Rocha LP, Cezar-Vaz MR Tags: Rev Bras Enferm Source Type: research

Prevalence of medication therapy adherence in the elderly and related factors.
er CG PMID: 27280570 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Gautério-Abreu DP, Santos SS, Silva BT, Gomes GC, Cruz VD, Tier CG Tags: Rev Bras Enferm Source Type: research

Social representations of nursing students about hospital assistance and primary health care.
ra ID PMID: 27280571 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Mendes FR, Zangão MO, Gemito ML, Serra ID Tags: Rev Bras Enferm Source Type: research

Stress and cardiovascular risk: multi-professional intervention in health education.
PMID: 27280572 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Gomes CM, Capellari C, Pereira DD, Volkart PR, Moraes AP, Jardim V, Bertuol M Tags: Rev Bras Enferm Source Type: research

Influence of the São Paulo State innovative models on Brazil's mental health policy.
Influence of the São Paulo State innovative models on Brazil's mental health policy. Rev Bras Enferm. 2016 Mar-Apr;69(2):360-367 Authors: Vieira MD, Marcolan JF PMID: 27280573 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Vieira MD, Marcolan JF Tags: Rev Bras Enferm Source Type: research

Teaching airway management with laryngeal mask: randomized controlled trial.
PMID: 27280574 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Pedersoli CE, Pedersoli TA, Faro AC, Dalri MC Tags: Rev Bras Enferm Source Type: research

Characterization of undergraduate nursing courses according to the National Student Performance Exam.
PMID: 27280575 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Dias MS, Silva LM, Silva LC, Silva AD, Torres RA, Brito MD Tags: Rev Bras Enferm Source Type: research

Prevalence and factors associated with traffic accidents involving motorcycle taxis.
PMID: 27280576 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Almeida GC, Medeiros FD, Pinto LO, Moura JM, Lima KC Tags: Rev Bras Enferm Source Type: research

Suicidal behavior among drug addicts.
ti NC PMID: 27280577 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Cantão L, Botti NC Tags: Rev Bras Enferm Source Type: research

Anxiety in the preoperative period of heart surgery.
ra SM PMID: 27280578 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Gonçalves KK, Silva JI, Gomes ET, Pinheiro LL, Figueiredo TR, Bezerra SM Tags: Rev Bras Enferm Source Type: research

Interventions that facilitate adherence to Pap smear exam: integrative review.
PMID: 27280579 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 29, 2016 Category: Nursing Authors: Soares MB, Silva SR Tags: Rev Bras Enferm Source Type: research

The challenge of the 67th Brazilian Conference of Nursing: In what direction is the Brazilian Nursing going?
PMID: 26871209 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Fonseca RM, Fonseca AD Tags: Rev Bras Enferm Source Type: research

Nursing education: training evaluation by graduates, employers and teachers.
CONCLUSION: the participation of actors participants of the training process and performance of professional nurses in the evaluation of a curriculum pointed aspects to realignment and provided concrete benefits to improving the quality of undergraduate course curriculum, scenario of this study. PMID: 26871210 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Meira MD, Kurcgant P Tags: Rev Bras Enferm Source Type: research

Evaluation of environmentally sustainable actions in the medication process.
CONCLUSION: the practice of sustainable actions in the hospital is possible, contributing to the optimization of resources and waste production with benefits to the institution, environment, and health. PMID: 26871211 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Furukawa PO, Cunha IC, Pedreira MD Tags: Rev Bras Enferm Source Type: research

Health indicators of workers of the hospital area.
CONCLUSION: the results allow the reflection and redirection of actions for workers' health, as the processes of becoming ill are compounded by exposure to psychic burdens. These indicators, when monitored, can contribute to the transformation of the profile of morbidity of these workers. PMID: 26871212 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Santana LL, Sarquis LM, Miranda FM, Kalinke LP, Felli VE, Mininel VA Tags: Rev Bras Enferm Source Type: research

Influence of sociodemographic and clinical characteristics at the impact of valvular heart disease.
CONCLUSION: The impact of the disease was influenced by sociodemographic and clinical variables. The results provide subsidies for the design of nursing interventions aimed at reducing the impact of the disease on the patient's daily life with valve disease. PMID: 26871213 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Anjos DB, Rodrigues RC, Padilha KM, Pedrosa RB, Gallani MC Tags: Rev Bras Enferm Source Type: research

Factors associated with inconsistent condom use among people living with HIV/Aids.
CONCLUSION: the prevalence of inconsistent condom male use among PLWHA was low, however, evidenced greater compliance among men over women with a statistically significant difference and the daily use of alcohol was associated with inconsistent condom use. PMID: 26871214 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Reis RK, Melo ES, Gir E Tags: Rev Bras Enferm Source Type: research

Evaluating child care in the Family Health Strategy.
CONCLUSION: there are discrepancies between health needs of children and what is offered by the service; organizational barriers to access; absence of counter-reference; predominance of curative and long-standing and individual preventive practices; verticalization in organization of actions; and lack of good communication between professionals and users. PMID: 26871215 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Silva SA, Fracolli LA Tags: Rev Bras Enferm Source Type: research

Implementation of fast tests for syphilis and HIV in prenatal care in Fortaleza - Ceará.
CONCLUSION: the primary units have difficulties in implementing FT in syphilis and HIV in the prenatal routine. This activity is seen as an effective strategy to reduce vertical transmission of these infections. PMID: 26871216 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Lopes AC, Araújo MA, Vasconcelo LD, Uchoa FS, Rocha HP, Santos JR Tags: Rev Bras Enferm Source Type: research

Coping strategies for oncology nurses in high complexity.
CONCLUSION: coping strategies are expressed in the cultural understanding of what it means to have cancer or not and management of health institutions for nurses to work with satisfaction. The service in education is a major factor in the development of ethical competence. PMID: 26871217 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Luz KR, Vargas MA, Barlem EL, Schmitt PH, Ramos FR, Meirelles BH Tags: Rev Bras Enferm Source Type: research

Evaluation of quality of life of visually impaired.
CONCLUSION: these results reflect the importance of the nurse to perform health education actions promoting the empowerment, autonomy and guaranteed of access in society for this clientele. PMID: 26871218 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Rebouças CB, Araújo MM, Braga FC, Fernandes GT, Costa SC Tags: Rev Bras Enferm Source Type: research

Evaluation of the care program implementation to people with high blood pressure.
CONCLUSION: in addition to qualifying structure, there are: the need to identify people with hypertension as risk factors, perform risk stratification and systematic care planning, establishing an advanced clinical practice, such as support for self-care and management cases, accomplish with existing protocols and develop collective actions based on information systems. PMID: 26871219 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Silva RL, Barreto MD, Arruda GO, Marcon SS Tags: Rev Bras Enferm Source Type: research

Children with special health needs and family: implications for Nursing.
CONCLUSION: nursing plays an important role in the lives of families, children and adolescents, through emotional support, guidelines and care inserted in the health care network. PMID: 26871220 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Figueiredo SV, Sousa AC, Gomes IL Tags: Rev Bras Enferm Source Type: research

Assessment of the risk of pressure ulcer development among hospitalized HIV/Aids patients.
CONCLUSION: risk assessment using scales provides objective information to assist with systemized and targeted nursing decision-making. PMID: 26871221 [PubMed - in process] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Cidral S, Silva WF, Visentin A, Borghi AC, Mantovani Mde F, Hey AP Tags: Rev Bras Enferm Source Type: research

Defining characteristics of the nursing diagnosis "ineffective airway clearance".
CONCLUSION: the characteristics decreased breath sounds, ineffective cough and respiratory adventitious sounds have better predictive capacity for the diagnosis "ineffective airway clearance" in children with acute respiratory infection. PMID: 26871222 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Chaves DB, Beltrão BA, Pascoal LM, Oliveira AR, Andrade LZ, Santos AC, Moura KK, Lopes MV, Silva VM Tags: Rev Bras Enferm Source Type: research

Significations of being the caregiver of the companion with cancer: an existential look.
CONCLUSION: in the midst of difficulties, the feelings of affection are the driving force behind these women to continue their actions as wife-caregivers. PMID: 26871223 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Piolli KC, Medeiros M, Sales CA Tags: Rev Bras Enferm Source Type: research

Hospitalizations sensitive to primary health care at a regional hospital in the Federal District.
CONCLUSION: the results may help managers and health professionals to implement actions that aim higher solvability of primary care, and contribute to the systematization of nursing care and improved health care. PMID: 26871224 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Sousa NP, Rehem TC, Santos WS, Santos CE Tags: Rev Bras Enferm Source Type: research

Exposure and sun protection practices of university students.
CONCLUSION: although the sample was made up of people with greater access to information, it was found exposure and sunscreen improperly. Education, individual and collective actions should be strengthened and prioritized given the incidence of skin cancer in the country. PMID: 26871225 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Urasaki MB, Murad MM, Silva MT, Maekawa TA, Zonta GM Tags: Rev Bras Enferm Source Type: research

Quality of life and accession to the pharmacological treatment among elderly hypertensive.
es LR Abstract OBJECTIVE: to compare variables obtained in adherence and non-adherence to drug treatment for hypertension, according to socioeconomic situation, time of diagnosis, self-reported morbidities, indicative of depression and quality of life. METHOD: cross-sectional analytical study of 524 elderly with adherence and 505 non-adherence to the treatment. A descriptive analysis, Chi-square test and Student t test (p
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Tavares DM, Guimarães MO, Ferreira PC, Dias FA, Martins NP, Rodrigues LR Tags: Rev Bras Enferm Source Type: research

Clinical competences of nursing assistants: a strategy for people management.
Abstract OBJECTIVE: to identify the clinical competences of nursing assistants in a hospital organization and to understand how professional acquired these competences. METHOD: an exploratory study of a qualitative approach, performed at a private hospital in southern Brazil, through a semi-structured interview, in May and June 2013 with 20 nursing assistants. RESULTS: the nursing assistantswho worked longer in the same work unit had a higher list of clinical competences. The acquisition of clinical competences occurred through interaction with other professionals; in daily nursing practice; in previous ...
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Aued GK, Bernardino E, Peres AM, Lacerda MR, Dallaire C, Ribas ED Tags: Rev Bras Enferm Source Type: research

Profile of patients with brain tumors and the role of nursing care.
T, Silva KR Abstract OBJECTIVE: to describe the profile of 200 patients with central nervous system tumors (CNST), and the role of the nursing care. METHOD: prospective, quantitative and descriptive analysis of medical records of 200 patients with TSNC. RESULTS: a total of 61% of our patients had benign CNST and 39% had malignant tumors. The extent of patient dependence, according to the Karnofsky Performance Status scale, was significantly greater for patients with malignant CNST (p
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Magalhães KC, Vaz JP, Gontijo PA, Carvalho GT, Christo PP, Simões RT, Silva KR Tags: Rev Bras Enferm Source Type: research

Conditions of functional health literacy of an elderly diabetics group.
CONCLUSIONS: the low functional health literacy could be a self-care conditioning and can be influenced by low schooling because it implies to have skills to understand and make decisions aimed at self-management of health. PMID: 26871229 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Santos MI, Portella MR Tags: Rev Bras Enferm Source Type: research

Clinical indicators of sexual dysfunction in pregnant women: integrative literature review.
CONCLUSION: clinical indicators can be added to the nursing diagnosis to favor an accurate diagnosis and effective interventions in the surveillance of pregnancy as a period of healthy sexual experience. PMID: 26871230 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Carteiro DM, Sousa LM, Caldeira SM Tags: Rev Bras Enferm Source Type: research

Meleis' Nursing Theories Evaluation: integrative review.
CONCLUSION: the analysis of nursing theories provides support to nurses in the practice, research, education and administration of the different dimensions of care. Meleis' model figures as very important by contributing to the development of knowledge of nursing discipline, considering that its use as a method allows several reflections on theories in order that they be revalidated to support a more theoretical and practical applicability. PMID: 26871231 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Ramalho Neto JM, Marques DK, Fernandes MD, Nóbrega MM Tags: Rev Bras Enferm Source Type: research

Nurses' performance on primary care in the National Health Service in England.
CONCLUSION: benefits in expanding nursing roles, were visible, contributing to primary care quality. PMID: 26871232 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Toso BR, Filippon J, Giovanella L Tags: Rev Bras Enferm Source Type: research

Qualitative methodologies in health research: interpretive referential of Patricia Benner.
CONCLUSION: The use of this methodological framework entailed a great challenge for the researcher, however, it also enabled a unique opportunity to illuminate important existential phenomena related to the daily lives of research participants. PMID: 26871233 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Santos RP, Neves ET, Carnevale F Tags: Rev Bras Enferm Source Type: research

Nursing process documentation: rationale and methods of analytical study.
CONCLUSION: This study will provide important empirical evidence on the factors involved in the nursing process documentation. PMID: 26871234 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Authors: Cruz DA, Guedes ES, Santos MA, Sousa RM, Turrini RN, Maia MM, Araújo SA Tags: Rev Bras Enferm Source Type: research

Erratum.
ERRATUM. Rev Bras Enferm. 2016 Feb;69(1):205 Authors: PMID: 26871235 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Tags: Rev Bras Enferm Source Type: research

Erratum.
ERRATUM. Rev Bras Enferm. 2016 Feb;69(1):206 Authors: PMID: 26871236 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - February 1, 2016 Category: Nursing Tags: Rev Bras Enferm Source Type: research

Health technologies for spatial analysis and situational diagnosis of the territories: contributions to nursing.
o RA PMID: 26676419 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - December 1, 2015 Category: Nursing Authors: Arcêncio RA Tags: Rev Bras Enferm Source Type: research

Sedentary lifestyle in individuals with hypertension.
CONCLUSION: the study identifi es main indicators for inference of SL as well as their possible causal factors among people with hypertension. PMID: 26676420 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - December 1, 2015 Category: Nursing Authors: Martins LC, Lopes MV, Guedes NG, Nunes MM, Diniz CM, Carvalho PM Tags: Rev Bras Enferm Source Type: research

From frustration to coping with caring for death by nurse technicians.
CONCLUSION: according to Symbolic Interactionism, a novice professional's frustration in caring for an individual for death is related to his/her interaction and interpretation of the situation as he/she feels prepared only to care for individuals for life. PMID: 26676421 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - December 1, 2015 Category: Nursing Authors: Beraldo LM, Almeida DV, Bocchi SC Tags: Rev Bras Enferm Source Type: research

Children and adolescents with chronic kidney disease in haemodialysis: perception of professionals.
CONCLUSION: the results showed aspects that impact the quality of life of these customers and, therefore, will be considered in the development of specifi c DISABKIDS® module. In addition, these aspects are relevant to the preparation and planning of actions directed towards children and adolescents with chronic kidney disease. PMID: 26676422 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - December 1, 2015 Category: Nursing Authors: Abreu IS, Nascimento LC, Lima RA, Santos CB Tags: Rev Bras Enferm Source Type: research

First civil service examination for nurses at the Administrative Department of Public Service.
CONCLUSION: although the exam legitimized the meritbased culture in the staff selection in the area of Brazilian nursing, egalitarian criteria were mitigated, especially regarding the grades applied to different kinds of exams. This resulted in a significant number of temporary nurses approved. PMID: 26676423 [PubMed - as supplied by publisher] (Source: Revista Brasileira de Enfermagem)
Source: Revista Brasileira de Enfermagem - December 1, 2015 Category: Nursing Authors: Brasileiro DF, Sanna MC Tags: Rev Bras Enferm Source Type: research

Physical and psychological violence against the elderly: prevalence and associated factors.
Abstract OBJECTIVE: to verify the prevalence and associated factors to physical and psychological violence against elderlies and trace the sociodemographic and clinical indicators of this population. METHOD: household survey conducted in 729 elderlies Uberaba - MG. Data were analyzed by Chi-square test and logistic regression (p
Source: Revista Brasileira de Enfermagem - December 1, 2015 Category: Nursing Authors: Paiva MM, Tavares DM Tags: Rev Bras Enferm Source Type: research