4,508 research outputs found

    Attenuation of the Ganglion Cell Layer in a Premature Infant Revealed with Handheld Spectral Domain Optical Coherence Tomography

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    Purpose: To report on subclinical retinal abnormalities shown through handheld spectral domain optical coherence tomography on a premature infant. Methods: Case report. Results: The initial and follow-up exams on a premature infant revealed severely attenuated ganglion cell and nerve fiber layers. There was cystoid macular edema in both eyes at the initial visits, which resolved by the 1-year follow-up. Discussion: Optical coherence tomography can reveal significant retinal abnormalities in premature infants which are not detectable through funduscopic exam. Documenting such findings may be useful for the comprehensive management of vision problems in children with a history of premature birth

    Nitrification-denitrification in WSP: a mechanism for permanent nitrogen removal in maturation ponds

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    A pilot-scale primary maturation pond was spiked with 15N-labelled ammonia (15NH4Cl) and 15N labelled nitrite (Na15NO2), in order to improve current understanding of the dynamics of inorganic nitrogen transformations and removal in WSP systems. Stable isotope analysis of δ15N showed that nitrification could be considered as an intermediate step in WSP, which is masked by simultaneous denitrification, under conditions of low algal activity. Molecular microbiology analysis showed that denitrification can be considered a feasible mechanism for permanent nitrogen removal in WSP, which may be supported either by ammonia-oxidising bacteria (AOB) or by methanotrophs, in addition to nitrite-oxidising bacteria (NOB). However, the relative supremacy of the denitrification process over other nitrogen removal mechanisms (e.g., biological uptake) depends upon phytoplanktonic activity

    Human Activity Recognition Using CNN and Lstm Deep Learning Algorithms

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    Human Activity Recognition recognizes and classifies the activities performed by the users or people based on the data collected from the sensors of special devices such as smart-watches, smartphones etc. It has become easy to collect a huge amount of data from inertial sensors that are embedded in wearable devices. An accelerometer and gyroscope sensors are most commonly used inertial sensors. There are various already available datasets, in our paper, we are using the Wireless Sensor Data Mining dataset which contains 1,098,207 data of 6 physical activities performed. In this paper, the activities we aim to classify are walking, jogging, going up and downstairs, standing, and sitting. There are various algorithms applied on the various datasets. In our paper, we use Convolutional Neural Network and Long Short-Term Memory deep learning algorithm on the data set, we split the data into training data [80%] and testing data [20%]. By using a confusion matrix, we recognize and classify the activities performed using maximum accuracy

    Cognitive Structure Strengthening Students of Smk N 1 Arse Class XII with Learning Model Advance Organizer by Grant Structured Lks Based Apos Theory

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    The purpose of this research: (1) Improving Students' Cognitive Structures through the Advance Organizer Model Learning by giving Structured Worksheets based on APOS Theory, (2) Improving student activity through the Advance Organizer Model Learning by giving Structured Worksheets based on APOS Theory. This research was a Classroom Action Research (CAR) which was carried out at SMK Negeri 1 Arse South Tapanuli. The research subject was grade 12 students of academy year 2012/2013 consisting 31 students, namely 18 males and 13 females. Object on this research were the student activity and student learning outcomes through the Advance Organizer Model Learning by giving Structured Worksheets based on APOS Theory. The research consisted of two cycles, each cycle consisting of three meetings. Test of achievement conducted at the end of each cycle. Test of achievement consisting of 15 questions. The results of the research are: (1) There is an increased of student learning outcomes on class XII Agribusiness Crop/Horticulture SMK Negeri 1 Arse which showed an increase in cognitive structure indicated strengthening of: (a) Outcomes of achievement test in the first cycle, namely: the average = 63.66; percentage of completeness = 41.94%, (b) Outcomes of achievement test in the second cycle, namely: the average = 82.58; percentage of completeness 90.32%. The percentage of completeness 48.39%, and the index gain 0.51 or moderate improvement criteria. (2) There is an increased of student activity on class XII Agribusiness Crop/Horticulture SMK Negeri 1 Arse shown from: first cycle is only the average of 59.72 up to 74.47 in the second cycle

    Morphological response of variable river discharge and wave forcing at a bar-built estuary

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    17 USC 105 interim-entered record; under review.The article of record as published may be found at https://doi.org/10.1016/j.ecss.2021.107438Observations of morphological evolution at Carmel River State Beach, Carmel, CA, USA, were made during two winter periods where the estuary underwent transitions from closed to open states episodically during each observation period. However, each winter was climatologically distinct: the first (Dec 2016–May 2017) was a high river discharge year (several events >200 m³ /s) with westerly offshore waves and the second (Dec 2017–May 2018) was a low river discharge year with northwesterly offshore waves. The morphological response of the beach was measured using Structure-from-Motion from both aircraft and unmanned aerial vehicles (UAVs) and shows two distinct seasonal trends. The first (in 2016–2017) indicates rapid (hours) and frequent (days-weeks) migration of the river breach channel across the span of the beach. The second (in 2017–2018) indicates no migration of the initial breach channel, despite multiple breach events. Analysis of the offshore wave energy using the Coastal Data Information Program (CDIP) hindcast model results indicate a stronger longshore wave radiation stress during the migratory breach year. In addition, discharge rates during this year were more than three times stronger than the non-migratory year, indicating a stronger offshore jet from the breach site. These observations support the hypothesis that migration requires both a strong river discharge and a longshore wave radiation stress component.Naval Postgraduate School Naval Research ProgramOffice of Naval Research-CRUSER Progra

    Overcoming inertia : drivers of the outsourcing process

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    Almost all managers have directly or indirectly been involved in the practice of outsourcing in recent years. But as they know, outsourcing is not straightforward. Outsourcing inertia, when companies are slow to adapt to changing circumstances that accommodate higher outsourcing levels, may undermine a firm’s performance. This article investigates the presence of outsourcing inertia and the factors that help managers overcome it. Using statistical evidence, we show that positive performance effects related to outsourcing can accumulate when circumstances change. This is then followed by rapid increases in outsourcing levels (i.e. outsourcing processes). We investigate what gives rise to these outsourcing processes through follow-up interviews with sourcing executives, which suggest five drivers behind outsourcing processes: managerial initiative (using outside experience); hierarchy (foreign headquarters); imitation (of competitors and of similar firms); outsider advice (from external institutions); knowledge sources (using external information). These five drivers all offer scope for managerial action. We tie them to academic literatures and suggest ways of investigating their presence and impact on the outsourcing process. Overall, we conclude that while economizing factors play a key role in explaining how much firms outsource, it is socializing factors that tend to drive outsourcing processes

    Individual response to three types of nonlethal weapons

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    This study investigates behavioral reactions to three types of nonlethal weapons (NLWs) used by the U.S. military. We provided participants with simulated situations involving military use of NLWs, and asked them to predict how they would react. We found variations in response according to weapon type. In general, individuals were unlikely to aggress or disperse, although these reactions were mediated by demographic factors. It may be important for Army officials to know the behavioral effects of NLWs in order to use them effectively

    Superelastic response of 111 and 101 oriented NiTi micropillars

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    A combination of microcompression experiments on single crystal micron-scaled pillars of NiTi of known orientations and in situ neutron diffraction during loading of the same NiTi but in bulk, polycrystalline form are carried out to understand the stress-induced transformation associated with superelasticity at reduced length scales. At the length scales investigated, there is evidence through this work of a fully reversible stress-induced transformation from B2 to B19\u27 NiTi that does not involve additional dislocation activity or irrecoverable strains. The orientation dependence of the elastic deformation of the 82 phase, the onset of its transformation to the B19\u27 phase, the gradient and the hysteresis in the stress-strain response during transformation, the elastic modulus of the stress-induced B19\u27 phase and the onset of plasticity are quantified and analyzed in these experiments by examining the crystallography of the B2 to B19\u27 transformation

    Penentuan Status Resistensi Aedes Aegypti dari Daerah Endemis Dbd di Kota Depok terhadap Malathion

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    PENENTUAN STATUS RESISTENSI Aedes aegypti DARI DAERAH ENDEMIS DBD DI KOTA DEPOK TERHADAP MALATHIO

    An Atom Michelson Interferometer on a Chip Using a Bose-Einstein Condensate

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    An atom Michelson interferometer is implemented on an "atom chip." The chip uses lithographically patterned conductors and external magnetic fields to produce and guide a Bose-Einstein condensate. Splitting, reflecting, and recombining of condensate atoms are achieved by a standing-wave light field having a wave vector aligned along the atom waveguide. A differential phase shift between the two arms of the interferometer is introduced by either a magnetic-field gradient or with an initial condensate velocity. Interference contrast is still observable at 20% with atom propagation time of 10 ms
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