Treatment of hypertension in children and adolescents

The treatment of hypertension in children and adolescents has been markedly changed in recent years by several factors, including the publication of new consensus recommendations, the obesity epidemic, and the increased availability of information on efficacy and safety of antihypertensive medications in the young. In this review we present an updated approach to the outpatient management of hypertension in the child or adolescent, utilizing representative cases to illustrate important principles as well as possible controversies

Functional neuroimaging Using UWB Impulse Radar: a feasibility study

Microwave imaging is a promising new modality for studying brain function. In the current paper we assess the feasibility of using a single chip implementation of an ultra- wideband impulse radar for developing a portable and low-cost functional neuroimaging device. A numerical model is used to predict the level of attenuation that will occur when detecting a volume of blood in the cerebral cortex. A phantom liquid is made, to study the radar’s performance at different attenuation levels. Although the radar is currently capable of detecting a point reflector in a phantom liquid with submillimeter accuracy and high temporal resolution, object detection at the desired level of attenuation remains a challenge

UWB radar for non-contact heart rate variability monitoring and mental state classification.

Heart rate variability (HRV), as measured by ultra-wideband (UWB) radar, enables contactless monitoring of physiological functioning in the human body. In the current study, we verified the reliability of HRV extraction from radar data, under limited transmitter power. In addition, we conducted a feasibility study of mental state classification from HRV data, measured using radar. Specifically, arctangent demodulation with calibration and low rank approximation have been used for radar signal pre-processing. An adaptive continuous wavelet filter and moving average filter were utilized for HRV extraction. For the mental state classification task, performance of support vector machine, k-nearest neighbors and random forest classifiers have been compared. The developed system has been validated on human participants, with 10 participants for HRV extraction, and three participants for the proof-of-concept mental state classification study. The results of HRV extraction demonstrate the reliability of time-domain parameter extraction from radar data. However, frequency-domain HRV parameters proved to be unreliable under low SNR. The best average overall mental state classification accuracy achieved was 82.34%, which has important implications for the feasibility of mental health monitoring using UWB radar

The homestake surface-underground scintillations: Description

Two new detectors are currently under construction at the Homestake Gold Mine a 140-ton Large Area Scintillation Detector (LASD) with an upper surface area of 130 square meters, a geometry factor (for an isotropic flux) of 1200 square meters, sr, and a depth of 4200 m.w.e.; and a surface air shower array consisting of 100 scintillator elements, each 3 square meters, spanning an area of approximately square kilometers. Underground, half of the LASD is currently running and collecting muon data; on the surface, the first section of the air shower array will begin operation in the spring of 1985. The detectors and their capabilities are described

Metode Menghilangkan Cairan Buah Tomat dalam Uji Perkecambahan Biji Tomat( Lycopersicum Esculentum Mill.)

Budidaya tanaman tomat tidak terlepas dari ketersediaan bibit yang baik yang berasal dari biji yang berkualitas sebagai benih. Dalam penyediaan bibit di lapangan, petani tomat lebih senang menggunakan biji tomat dari toko-toko pertanian walaupun harganya lebih mahal dibandingkan dengan menyediakan sendiri. Penyediaan biji sendiri selain memerlukan waktu yang lebih lama juga daya perkecambahannya rendah karena di bagian luar biji tomat terdapat cairan buah yang dapat menghambat perkecambahan biji sehingga tidak menghasilkan bibit yang maksimal. Dengan demikian, perlu dicari metode yang tepat untuk menghilangkan cairan buah tomat pada biji. Penelitian ini dilaksanakan di Laboratorium Botani FMIPA Universitas Lampung, dari bulan Agustus- September 2012. Percobaan dirancang secara Acak Lengkap (RAL) dengan 8 perlakuan diulang sebanyak 4 kali. Parameter yang diukur adalah persentase perkecambahan dan kecepatan perkecambahan. Data yang diperoleh diuji homogenitas kemudian dilakukan uji ANARA dan dilanjutkan dengan uji lanjut Duncan pada taraf α = 5%. Hasil penelitian menunjukkan bahwa: metode yang tepat untuk menghilangkan cairan buah tomat yang menyelubungi biji tomat adalah dengan cara dicuci dan dikeringkan

Effect of Kirinyuh Leaf Extract (Cromolaena odorata [L.] R.M. King & H. Rob) On Rice Paddy Growth (Oryza sativa L.) Variety of Mekongga in Drought Stress Condition

The purpose of this research was to know whether kirinyuh leaf water extract could improve the growth of mekongga varieties rice paddy under the condition of drought stress.This research was conducted at Botanical Laboratory of Biology Department Faculty of Mathematics and Natural Sciences University of Lampung from September to October 2017. The research was conducted in a 3 x 2 factorial experiment. Factor A was Polyethylene glicol 6000 with 3 levels of concentration: 0% w / v, 15% w / v, and 30% w / v. Factor B was kirinyuh leaf water extract with 2 concentration levels: 0% w / v and 2% w / v. As parameters were the mean of shoots length, fresh weight, dry weight, and the relative water content of rice seedling. Levene test, analysis of vaiance, and Tukey test were performed at 5% significant level. The results showed that water extract of kirinyuh leaves had no significant effect on shoot length, fresh weight, and dry weight of rice seedling, but influenced the relatife water content of rice seedling. From the result of research it was concluded that kirinyuh leaf water extract can not improve the growth of Mekongga rice paddy varieties at drougth stress conditio

Intracranial Heart Rate Detection Using UWB Radar

Microwave imaging is a promising technique for noninvasive imaging of brain activity. A multistatic array of body coupled antennas and single chip pulsed ultra-wideband radars should be capable of detecting local changes in cerebral blood volume, a known indicator for neural activity. As an initial verification that small changes in the cerebrovascular system can indeed be measured inside the skull, we recorded the heart rate intracranially using a single radar module and two body coupled antennas. The obtained heart rate was found to correspond to ECG measurements. To confirm that the measured signal was indeed from within the skull, we performed simulations to predict the time-of-flight of radar pulses passing through different anatomical structures of the head. Simulated time-of-flight through the brain corresponded to the measured delay of heart rate modulation in the radar signal. The detection of intracranial heart rate using microwave techniques has not previously been reported, and serves as a first proof that functional neuroimaging using radar could lie within reach