Benchmarking study between capacitive and electronic load technic to track I-V and P-V of a solar panel

<p>To detect defects of solar panel and understand the effect of external parameters such as fluctuations in illumination, temperature, and the effect of a type of dust on a photovoltaic (PV) panel, it is essential to plot the Ipv=f(Vpv) characteristic of the PV panel, and the simplest way to plot this I-V characteristic is to use a variable resistor. This paper presents a study of comparison and combination between two methods: capacitive and electronic loading to track I-V characteristic. The comparison was performed in terms of accuracy, response time and instrumentation cost used in each circuit, under standard temperature and illumination conditions by using polycrystalline solar panel type SX330J and monocrystalline solar panels type ET-M53630. The whole system is based on simple components, less expensive and especially widely used in laboratories. The results will be between the datasheet of the manufacturer with the experimental data, refinements and improvements concerning the number of points and the trace time have been made by combining these two methods.</p>

Acoustical performance of horizontal-sliding-panel operable partition walls

Field measurements of airborne sound transmission loss were made on several operable partitions of the horizontal-sliding-panel type between conference rooms. Apparent Sound Transmission Class (ASTC) and Noise Isolation Class (NIC) ratings were computed. Very significant deviation of field-measured sound transmission ratings and manufacturers' Sound Transmission Class (STC) ratings were found. Clients were not satisfied by actual sound isolating performance. Transmission of voice was clearly audible. Some deficiencies of field conditions were found. Some deficiencies of partition installation were found. Modifications were made; acoustical performance did not change significantly.

The effects of acoustical ceiling panel type and penetrations for services on vertical sound isolation inside buildings

Attenuation of sound transmitting between rooms oriented over one another inside buildings is studied. Transmission loss and sound transmission class were measured by an independent, accredited, acoustics laboratory with and without a variety of modular acoustic ceilings suspended under a baseline concrete floor structure. Ceiling panel material types include stone wool, fiberglass and mineral fiber. Ceilings were tested with and without the presence of service penetrations for supply air diffusers, return air grilles and light fixtures. Some ceilings were also scanned with a sound intensity probe and the resulting color sound maps are used as a supplemental method of evaluating both isolation and absorption performance of the individual components of the ceiling systems. Results show that while the effects of ceiling panel type on absorption performance, and thus room acoustics, is substantial, the material type and weight of the ceiling panels do not substantially affect the overall isolation performance of the floor-ceiling assembly.

SIG Tel@ Amazônia: promoting dialogue between specialists and primary care professionals in maternal and child health/ SIG Tel@ Amazônia: promovendo a interlocução entre especialistas e profissionais de Atenção Básica na saúde materno-infantil

The Brazilian Indigenous Health Survey showed an increase in birth rates but also found an increase in deaths from malnutrition in early childhood. The study aimed to assess the effectiveness of an educational intervention involving primary care and childcare professionals' training on breastfeeding for indigenous infants. A cross-sectional panel-type descriptive study to assess breastfeeding interventions was conducted in two Special Indigenous Health Districts (SIHDs) of Amazonas State (Upper Rio Solimões and Upper Rio Negro) in 2018. The analysis compared the preintervention (January-June) and postintervention (September-December) periods in the two SIHDs and compared the intervention SIHDs with one SIHD that did not receive the intervention (Middle Rio Purus SIHD). As a result, there was a growth in lactation consultations after the intervention, with a 2,398% increase in Upper Rio Solimões and a 423% increase in Upper Rio Negro. Although the results show no evidence of early weaning, exclusive breastfeeding was ongoing for indigenous infants over six months of age. The participatory focus of the project's awareness-raising workshop guaranteed the health teams' active involvement. The Ministry of Health promotes training activities on the importance of counseling young indigenous women. However, the results show some uncertainty that this service is happening in the indigenous communities served by these SIHDs. Breastfeeding in indigenous peoples presents challenges that require specific public health interventions. Regarding the involvement of leaders and health professionals, there is an expectation of breastfeeding improvements in the region.

Off-centered Ball Resolution Through Multi-hole Process Plate Implementation at Wirebond Process

With the continuous trend of new technologies in semiconductor manufacturing assembly, challenges and issues are unavoidable. This paper presents the modification and improvement done on the process plate design to eliminate the bouncing effect of the silicon die that leads to off-centered ball (OCB) reject during the formation of wire on a quad flat no-leads (QFN) device. The panel type single-row process plate cannot totally vacuum the warped leadframe and this is resulting to off-centered ball. Through changing the panel type single-row process plate to panel type multi-hole process will have a strong vacuum sucked underneath the leadframe and eliminates the occurrence of off-centered ball. Future works could use the improved process plate design for devices of similar configuration.

IMPRESS BIM Methodology and Software Tools (iBIMm) for Façade Retrofitting Using Prefabricated Concrete Panels

IMPRESS is a H2020 funded project that has developed prefabricated façade panels to reduce building energy demand. In order to accelerate and optimise the retrofit process, IMPRESS has developed an iterative design methodology (IDM), which incorporates all stages of the design-construct-install-operate process and aims to bring energy efficiency as early as possible in the design process. Three software tools have been developed for this purpose: (1) an online decision support software (DSS), to inform decision-making on which panel type is suitable for the building; (2) an interoperable data exchange server (IDES) to allow exchange of information related to the design, construction, installation and operation of the facade; and (3) an online management platform (OMP) for coordination through all stages. The merger of the design methodology and software tools is called IMPRESS BIM methodology (iBIMm) which enables design teams to make informed decisions based on building information models and provides a platform to monitor its performance during the operation stage.

Experimental study on the behavior of MSE wall having full-height rigid facing and segmental panel-type wall facing

The amount of the lateral displacements on the mechanically stabilized earth (MSE) wall depends on the reinforcement extensibility and length, reinforcement-to-facing connection, and the wall facing, among others. In this study, the deformation behavior of MSE wall models was focused considering two types of wall facing and three types of reinforcement. A series of small-scale model tests were undertaken on the MSE wall having a full-height rigid (FHR) facing and a segmental panel-type (SPT) wall facing. At the same time, the models were using discrete geogrids, geosynthetic strips, and steel rods as reinforcement. The results showed that the geogrids-reinforced MSE wall with FHR facing exhibited the highest load capacity with the least vertical displacements. The MSE wall models with steel reinforcements generally exhibited the least lateral displacements at wall facing than those with geosynthetics reinforcements. Finally, the results showed that MSE wall models with FHR facing have generally lesser lateral displacements at the wall facing compared to those with SPT wall facing.