Boston Applied Technologies (United States)

Object detection sits at the core of contemporary computer vision, powering everything from security cameras to driverless cars. In this work, we put Torchvision’s latest detection models under the microscope, while Comet’s rocksolid experiment-tracking keeps score. Drawing on the finely annotated Penn-Fudan Pedestrian dataset, we guide the reader through every step-weight initialization, data wrangling, training routines, and evaluation protocols-examining each model’s knack for adaptation and generalization. A battery of trials teases apart the strengths and shortcomings of marquee architectures such as Mask RCNN, Fast RCNN, Faster RCNN, and RetinaNet. Key yardsticks-mean Average Precision, mean Average Recall, and the trusty F1 score-are logged and visualized in painstaking detail with Comet, revealing each network’s quirks and capabilities. The discussion then turns pragmatic, outlining best practices for deployment and lifecycle management and leaning on Comet’s artifact logging to streamline the hand-off from lab to production. Altogether, the study offers a clear, end-to-end framework that equips researchers and engineers to navigate the real-world maze of object-detection tasks with confidence.

Abstract Background: Human Immunodeficiency Virus (HIV) is infection which mainly attacks immune system of an individual. Its disease progress is rapid in children and if treatment is not initiated nearly half of infected children will die by the second year of infection. In Ethiopia, nearly twenty four percent of HIV related death is happen to under-five children; however studies done in this specific age group are limited are with poor evidence of predictors. Objectives: To determine time to death and identify predictors of death in HIV infected under-five children on antiretroviral therapy in Amhara regional state, Oromia ‘liyu’ zone, Northeast Ethiopia, from 2014 to 2019. Methods: Institution based retrospective follow up study was conducted in 376 under-five HIV-infected children on antiretroviral therapy from January 2014 to December 2019 in health institutions in Oromia Liyu Zone, Amhara region, Ethiopia. Multivariable Cox-proportional hazard regression model was used to identify independent predictors of Mortality in HIV-infected under-five children on antiretroviral therapy. Results: At the end of follow up, 285 (80.28%) of HIV-infected children were alive, 39 (10.99%) were lost to follow up, 11 (3.94%) were transferred out and 21 (5.59%) were reported dead due to HIV/AIDS. The cumulative survival probabilities of children after 3, 6, 12, 24 and 36 months were 0.99, 0.98, 0.97, 0.89 and 0.87 respectively. The overall mean time to death was 19.7 months (95%CI= 18.74-20.67) with incidence of 5.9 deaths per 100 child-months (95%CI: 3.89-9.09). Children with severe malnutrition at baseline (AHR=4.9; 95 CI: 1.04, 23.50), advanced WHO clinical stage at enrolment (AHR=3.9; CI: 1.37, 10.88), poor adherence to ART (AHR=6.56; CI: 3.33, 10.14) and with no history of Isoniazide prophylaxis were significantly associated to higher mortality events (AHR=3.6; CI: 1.24, 10.18). Conclusion: Death of HIV-infected under-five children on ART is high within the first one year after enrolment. The risk of death increased if the child was malnourished at begging of treatment, had poor ART adherence, with advanced WHO clinical stages and lack of Isoniazide prophylaxis during their age of infancy.

The purpose of this research is to find out the assessment of the results of the study of Islamic religious education by applying a cooperative model of Make a Match type in students of Grade VIII SMPN 3 Bati-Bati subdistrict of Bati-Bati of Tanah Laut Regency and to know the implementation of a cooperative learning model of Make a MACTH in Islamic religious education. This research is qualitative descriptive research with a type of action class research participant. The subject in this study was all students of grade VIII SMPN 3 Bati-Bati. While the object in this study is improved assessment of learning outcomes and the process of implementing cooperative learning model type Make a Match. Based on the results of the research, it is noted that through the implementation of the type of cooperative learning model of Make a Match can improve the assessment of learning outcomes of Islamic education in grade VIII students SMPN 3 Bati-Bati. This can be known from the successful research indicators that are qualitative indicators and quantitative indicators. The process of applying a cooperative learning model of the Make a Match type in Islamic religious education in grade VIII students SMPN 3 Bati-Bati runs effectively and efficiently according to the steps specified. This is evident from the increasing active students in following the learning process of Islamic religious education. Keywords: enhancement, learning outcomes, Islamic education, learning Model, Make a Match.

A broadband optical amplification was observed and investigated in Er3+-doped electrostrictive ceramics of lanthanum-modified lead zirconate titanate under a corona atmosphere. The ceramic structure change caused by UV light, electric field, and random walks originated from the diffusive process in intrinsically disordered materials may all contribute to the optical amplification and the associated energy storage. Discussion based on optical energy storage and diffusive equations was given to explain the findings. Those experiments performed made it possible to study random walks and optical amplification in transparent ceramics materials.

A novel dual functional device combining optical filtering and amplification by taking advantage of excellent electrooptic property in the gain medium was designed and demonstrated in covering both C- and L-bands.

ABSTRACT Chips-first semiconductor packaging is moving into high volume production. This growth is being driven by wireless applications' accelerating need for higher performance, lower costs, and smaller size. While the initial applications of chips-first packaging are fan-out packages, the technology is also well suited to the more sophisticated system-in-a-package applications. For system-in-a-package applications, chips-first packages are augmented by providing vias through the structural material in the chip-layer. Multiple interconnect layers are formed on each side of a chip-layer. Solder-bumps are formed on the bottom, and surface-mount pads on the top of each chip-layer. These layers can be stacked and interconnected by reflow of the solder. A manufacturing method for fabricating the chip-layer vias has been developed and refined; it offers significant cost and density advantages over the other approaches: 1. laser drill and fill and 2. mold and fill. These other approaches use via filling processes from the printed circuit board industry along with special processes to deal with epoxy residues that might otherwise be left on the active IC surface. In contrast, the method for fabricating chip-layer vias reported in this paper forms the vias by patterning a resist on a thin, seed metal layer on the alignment carrier. The resist thickness is somewhat thicker than the final thickness of the chips. Copper is plated up in the resist openings to form metal studs on the alignment carrier, which will become the chip-layer vias. After removal of the resist, chips are placed with their faces on to the alignment carrier, the structural material is added, and the surface is lapped flat. This Conductor-first photo-defined via process uses high yield wafer-level packaging processes to produce 100 micron vias on a 200 micron pitch, which meets the needs of the demanding target applications. In addition, high performance thermal conduits can be fabricated with the same process steps.

This chapter contains sections titled: Introduction Experimental Procedures Results and Discussion Acknowledgments

RF precursor plasma spray synthesis (RFPPS) is an innovative and rapid technique to deposit functional oxide coatings by starting from liquid inorganic precursors and directly producing ceramic coatings. RFPPS offers excellent opportunities in exploring the nonequilibrium phase evolution during plasma spraying of molecularly mixed precursors to form multicomponent oxides. A detailed discussion of progress, critical issues and consideration in precursor development, RF plasma spraying, coating development, and phase evolution of yttrium aluminum garnet (YAG) is presented as a case study. Appropriate selection of precursors and proper tuning of spray parameters resulted in amorphous or crystalline coatings in the as-sprayed condition. YAG phase selection has also been investigated using a discrete, low-density combinatorial synthesis approach.