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. Introduction: Malaria is a disease caused by parasites (protozoa) of the genus Plasmodium which are transmitted by the bite of a female Anopheles mosquito. People with malaria typically experience flu-like initial symptoms, high fever, chills, and headache. This disease can attack all age groups. Symptoms of malaria will appear after 10 days to 4 weeks in the form of fever, headache, vomiting and chills. Prevention by vector control and preventing mosquito bites to humans needs to be done to break the chain of transmission. Purpose: in this study to determine the relationship between the level of family knowledge and efforts to prevent malaria in the Maranatha Unit, Nolloth Village, East Saparua District. Method: Using a Cross Sectional design. and a total sample of 65 respondents using an instrument in the form of a questionnaire. The analysis used was the chi-squaer test. Results: there is a relationship between the level of family knowledge and efforts to prevent malaria in the Marantha Unit in Zeroth Village (p-value = 0.000). Conclusion: there is a relationship between the level of family knowledge and efforts to prevent malaria in the Marantha Unit in Zeroth Village (p-value = 0.000).

Efforts to prevent dengue fever by controlling the transmission of dengue fever virus by eradicating dengue mosquito vectors with the implementation of 3 M where the role of health workers is very important in this case. The purpose of this study was to determine the relationship between the role of health workers and Dengue Fever Prevention in Gampong Seupeu, Kuta Baro District, Aceh Besar Regency. This research method uses an analytic design with a cross sectional approach with a population of 256 family heads (KK) and a sample size of 72 family heads (KK), the sampling technique is stratified random sampling. Data collection using a questionnaire. This study was conducted on July 6-17, 2023 with univariate and bivariate analysis using the chi-square test. The results showed that of the 72 respondents most of the prevention efforts against dengue hemorrhagic fever in the category, the role of health workers was less as many as 42 people (58.3%) and played as many as 30 people (41.7%). the role of health workers (p=0.007) with efforts to prevent dengue hemorrhagic fever. Conclusion there is a role of health workers with efforts to prevent dengue hemorrhagic fever. It is recommended at the research site to hold health counseling about dengue hemorrhagic fever, so that people can know about dengue hemorrhagic fever and how to prevent dengue hemorrhagic fever.

Diffuser is one of the construction that is able to control the behavior of the fluid. Adverse pressure gradient (APG) causes boundary layer develops rapidly so that it causes separation and Cp becomes low. So that need to evaluating divergence angle of diffuser to delay the separation to get optimization Cp of diffuser. This study uses a numerical method with software Fluent 6.3.26 with k-ω turbulence model of shear stress transport (SST) for evaluate in a symmetric flat-walled diffuser with constant ratio in divergence angle (2θ1) = 8° and usedused the Reynolds number 12.9 x 104. Test section consisted of three parts, namely symmetric diffuser, upstream channels, and downstream channels. The symmetric diffuser has a length (L1) = 500 mm, the upstream channel length (L2) = 500 mm, and the downstream channel has a length (L3) = 1000 mm. The results of the study showed that there is no flow separation on the field at midspan vertical diffuser (2θ1) = 8 °. However, based on the velocity vector visualization, flow separation can be observed at midspan plane horizontal to diffuser (2θ1) = 8 ° indicated the occurrence of separation in the area after the inlet diffuser, ie at x / L1 = 1.4 and x / L1 = 1.6