Computational Fluid Dynamics Simulations of Chimpanzee Nasal Airflow for Different Respiratory Modes
In this study, we investigated the airflow and air-conditioning within an anatomically accurate computer model of the nasal airways belonging to a healthy adult chimpanzee. The finite volumes method was used to compute unsteady turbulent flows with physiological flow rates of 2.2 sin (2πt/3.4) [m/s], 1.8 sin (2πt/1.6) [m/s], and 4.4 sin (2πt/1.4) [m/s], mimicking breathing at rest state, shallow breathing under light stress, and a sniffing phase, respectively. Turbulent k-omega model was used to simulate unsteady respiratory phases whereas the turbulent k-epsilon model was used to simulate the sniffing phase. Simulation results argued that assuming a steady laminar inhalation state to investigate the air-conditioning performance within chimpanzee nasal cavity may be exaggerated. The outcomes of this study might potentially contribute in accumulating standardized biological information on healthy chimpanzee, and so increasing the ability to care for it as an endangered species.
Synthesis, Characterization and Antimicrobial Properties of Pd(II), Cr(III), Ni(II) and Co(II) Metal Complexes of Aniline and Sulphadiazine Schiff Bases as mixed Ligands
Novel Pd(II), Cr(III), Ni(II) and Co(II) metal complexes of Schiff bases were synthesized from the condensation reaction between salicylaldehyde and aniline (L1) and sulphadiazine (L2). They were characterized using FTIR and UV-Visible spectroscopy and subjected to conductivity, melting point and solubility measurements. The complexes are non-toxic, non-electrolytic and stable solids. The involvement of the azomethine nitrogen in coordination with the metals was confirmed by the IR and UV results. They showed good inhibitory activities against various microorganisms.
Private Estate Housing Productivity in Greater Port Harcourt, Nigeria
The housing deficit in Nigeria is reportedly of the order of 17 million units. The private sector remains the major supplier as in some other developing countries. However, productivity in Nigeria is hampered by many factors, including high cost of building materials, difficulty in obtaining title to land, a weak mortgage financing sector, and delay in obtaining building permit. In the study area, Greater Port Harcourt City, there is paucity of information on various aspects of housing, including supply, demand, nature of housing provided, satisfaction levels and relationship between housing and stage in the family life cycle. Therefore, the objectives of the research were to: (1) Ascertain the state of private residential housing estate development in GPHC; (2) ascertain the sources of private residential housing and the relative importance of private vis-à-vis public residential housing delivery; (3) critically examine the number, type and quality of housing provided in private residential estates and their functionality from the point of view of beneficiaries; and (4) ascertain bottlenecks to private residential estate housing delivery. This study was undertaken as a cross-sectional survey of (1) a probability sample of all persons residing in privately built estates and (2) all individuals or corporate firms who have supplied at least 4 building units and above constructed between 1978 and 2014 in Greater Port Harcourt City (GPHC). The research design used was the “passive-observational” method. The number of questionnaires administered to estate residents was 400 while the number administered to estate developers was 76. The study relied on two sources of information – primary and secondary. Primary sources comprised (a) a largely pre-coded questionnaire, administered face-to-face by trained interviewers, (b) Individual Depth Interviews (IDIs) of key informants, (c) direct observation, (c) measurement, and (d) photography. Secondary sources included: (a) unpublished and published material in past theses, books,…
Researching and developing interdisciplinary course that integrates science and art (CISA)
In this study, the purpose is to develop students’ comprehensive ability and positive attitude and understanding of interdisciplinary knowledge. For this purpose, an interdisciplinary Course that Integrates Science and Art(CISA) of the elementary education is researched and developed according to the curriculum design and assessment. The study is conducted in the autumn semester of the 2018-2019 school year. The study adopts both qualitative and quantitative approaches. The qualitative approach is used to simply draw a point of view on the effect of curriculum through the use of interviews. The quantitative approach is used to detect the acquisition of knowledge, the acquirement of skill and promotion of attitude. The sample of the study consists of a total of 39 studens, of which 21 are female students and 18 are male students serving in public schools in China. According to the results of the research, it is found that this course improved students’ art creation and scientific ability and understanding of multidisciplinary concepts related to the art and science.
Design and adaptive control of omni-directional mobile platform with four driving wheels
In this paper, a general kinematic model of the four drive wheel omnidirectional mobile platform is established, and the CMAC (Cerebellar model articulation controller) +PID joint control strategy is used to design the embedded adaptive control of the omnidirectional mobile platform in view of the problem that the conventional control can not be self-tuning online and the real-time response of the response needs to be improved. The MATLAB simulation and experimental analysis of DC motor speed regulation were carried out, and the motion performance of the prototype was tested by a series of typical experiments. The results show that the kinematic model of the mecanum wheel omnidirectional moving platform is reasonable. The dynamic response of the CMAC+PID adaptive controller is fast, the control precision is high, and the robustness is good. The prototype can achieve the horizontal / vertical translation, the original rotation and the omni-directional motion in the plane. The overall performance can meet the requirements of the engineering application.
Treatment and rehabilitation of patients with temporomandibular joint ankylosis
Introduction: The cases that involve this pathology promote discussions about diagnosis and treatment, generating numerous ways to treat this pathology. Objectives: To describe the treatment and rehabilitation of patients with temporomandibular joint ankylosis. Methodology: The information contained in this article results from the combination of research on patients and treatments involving TMJ ankylosis as well as its applications. Results: It was verified that there is no common therapeutic procedure for all patients, so there are several forms of treatment. Conclusion: It is necessary to have a multi professional team that is directed and committed in the diagnosis and treatment of the patient, as well as a line of research that facilitates the diagnosis.
Promoting healthy food practices through food education: a focus on functional foods
Introduction: The poor eating habits of large populations associated with a more sedentary lifestyle, are responsible for the increase of diseases linked to diet. Given this scenario, there is a worldwide interest in improving the quality of nutrition and reducing health spending. Objective: To promote an intervention action directed to the reeducation of food related to the consumption of functional foods, based on an intervention carried out at the Colégio Dom Augustinho Ikas in São Lourenço da Mata, Pernambuco. Methodology: The intervention was divided into 6 stages, where the topics on poor diet, healthy eating and functional foods were discussed. A practical gastronomic workshop and the application of questionnaires were carried out to evaluate the nutritional status of the participants, as well as the impact of the intervention. Outcome: Participants in the intervention already consumed some of these functional foods, being very positive from a nutritional point of view, although only 10% knew or had already heard about the subject. It was also possible to verify the gain of new knowledge by those involved. Conclusion: The intervention proved to be a sensitizing tool in relation to the factors related to food choices reconciled with the measure of health promotion and quality of life.
