36 research outputs found

    Observations of Infrared Radiative Cooling in the Thermosphere on Daily to Multiyear Timescales from the TIMED/SABER Instrument

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    We present observations of the infrared radiative cooling by carbon dioxide (CO2) and nitric oxide (NO) in Earth s thermosphere. These data have been taken over a period of 7 years by the SABER instrument on the NASA TIMED satellite and are the dominant radiative cooling mechanisms for the thermosphere. From the SABER observations we derive vertical profiles of radiative cooling rates (W/cu m), radiative fluxes (W/sq m), and radiated power (W). In the period from January 2002 through January 2009 we observe a large decrease in the cooling rates, fluxes, and power consistent with the declining phase of solar cycle. The power radiated by NO during 2008 when the Sun exhibited few sunspots was nearly one order of magnitude smaller than the peak power observed shortly after the mission began. Substantial short-term variability in the infrared emissions is also observed throughout the entire mission duration. Radiative cooling rates and radiative fluxes from NO exhibit fundamentally different latitude dependence than do those from CO2, with the NO fluxes and cooling rates being largest at high latitudes and polar regions. The cooling rates are shown to be derived relatively independent of the collisional and radiative processes that drive the departure from local thermodynamic equilibrium (LTE) in the CO2 15 m and the NO 5.3 m vibration-rotation bands. The observed NO and CO2 cooling rates have been compiled into a separate dataset and represent a climate data record that is available for use in assessments of radiative cooling in upper atmosphere general circulation models

    Seafloor mapping – the challenge of a truly global ocean bathymetry

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    Detailed knowledge of the shape of the seafloor is crucial to humankind. Bathymetry data is critical for safety of navigation and is used for many other applications. In an era of ongoing environmental degradation worldwide, bathymetry data (and the knowledge derived from it) play a pivotal role in using and managing the world’s oceans in a way that is in accordance with the United Nations Sustainable Development Goal 14 – conserve and sustainably use the oceans, seas and marine resources for sustainable development. However, the vast majority of our oceans is still virtually unmapped, unobserved, and unexplored. Only a small fraction of the seafloor has been systematically mapped by direct measurement. The remaining bathymetry is predicted from satellite altimeter data, providing only an approximate estimation of the shape of the seafloor. Several global and regional initiatives are underway to change this situation. This paper presents a selection of these initiatives as best practice examples for bathymetry data collection, compilation and open data sharing as well as the Nippon Foundation-GEBCO (The General Bathymetric Chart of the Oceans) Seabed 2030 Project that complements and leverages these initiatives and promotes international collaboration and partnership. Several non-traditional data collection opportunities are looked at that are currently gaining momentum as well as new and innovative technologies that can increase the efficiency of collecting bathymetric data. Finally, recommendations are given toward a possible way forward into the future of seafloor mapping and toward achieving the goal of a truly global ocean bathymetry

    PENINGKATAN KEMAMPUAN DAN VARIASI INKURI SISWA SMP MELALUI PEMBELAJARAN INKUIRI PADA TOPIK KALOR DAN PERPINDAHANNYA

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    Studi ini dilakukan untuk mendapat gambaran tentang peningkatan kemampuan dan variasi inkuiri siswa yang mendapatkan pembelajaran berbasis inkuiri dan pembelajaran konvensional yang dilakukan di salah satu SMP di Makassar. Penelitian ini menggunakan metode kuasi eksperimen dengan desain The Static-Group Pretest-Posttest Design. Sampel dalam penelitian adalah siswa kelas VII sebanyak dua kelas (n = 74) yang diambil dengan teknik sampling acak kelas. Teknik pengumpulan data menggunakan tes kemampuan inkuiri (pretest dan posttest) dan lembar observasi variasi kemampuan inkuiri. Teknik pengolahan data menggunakan uji normalitas, homogenitas, N-gain dan uji-t. Hasil analisis data uji-t diperoleh nilai Sig. 0,000 < 0,05 yang berarti HÂŹ0 ditolak, H1 diterima yang menunjukkan bahwa terdapat perbedaan peningkatan kemampuan inkuiri yang signifikan antara siswa yang belajar melalui model pembelajaran inkuiri dan pembelajaran konvesional. Hasil perhitungan N-gain menunjukkan bahwa siswa yang belajar melalui model pembelajaran inkuiri memiliki rata-rata N-gain 0,70 (kategori tinggi) yang lebih tinggi dibandingkan siswa yang belajar melalui model pembelajaran konvesional yang memiliki rata-rata N-gain 0,48 (kategori sedang). Hasil penelitian menunjukkan bahwa penerapan model pembelajaran inkuiri dapat meningkatkan kemampuan inkuiri yang lebih baik daripada penggunaan model pembelajaran konvensional. Hasil observasi pada kelas eksperimen menunjukkan variasi kemampuan inkuiri mengalami peningkatan pada setiap ciri esensial inkuiri. --- This study aimed to find the profile about enhancing inquiry ability and variation of students which is given inquiry based learning and conventional learning in one of middle school student in Makassar. This research used quasi experiment method with the static group pretest-posttest design. The sample of the research was the students of first grade as many as two class with total number of participants were 74 by using simple random sampling. The technique of collecting data used inquiry ability test (pretest and posttest) and observation sheet on inquiry ability variation. The technique analyzing data used N-gain test and t-test. The result of data analysis t-test showed score sig. 0,000 < 0,05 which mean H0 rejected, H1 received which showed there are significant difference to enhance the ability inquiry among students through inquiry learning and conventional learning. The result of N-gain showed students who learn through inquiry learning has average score N-gain 0,70 (high category) higher than students who learn through conventional learning has average score N-gain 0,48 (medium category). The result of research showed that implementation inquiry learning can enhance inquiry ability better than implementation conventional learning. The result of observation on experimental class showed variation inquiry ability has enhance in every essential feature of inquiry

    A parallel randomized controlled trial examining the effects of rhythmic sensory stimulation on fibromyalgia symptoms.

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    This double-blind, two-arm parallel randomized controlled trial investigated the effects of gamma-frequency rhythmic sensory stimulation on fibromyalgia. We were interested in whether rhythmic sensory stimulation would promote significant changes in fibromyalgia and associated symptoms, and whether treatment effects would differ between two distinct treatment parameters. Fifty patients with a formal diagnosis of fibromyalgia were randomly assigned to two test groups. One group received vibrotactile stimulation from a continuous sine wave single-frequency stimulation (40 Hz) for 30 minutes, five days per week, over five weeks, concomitant with usual care. The second group completed the same treatment protocol but received a different stimulation, consisting of random and intermittent complex wave gamma-range vibrotactile stimulation. Fibromyalgia symptoms, pain severity and interference, depression symptoms, quality of life and sleep quality were assessed at baseline and post-intervention. Results indicated that there were statistically significant changes from baseline to post-treatment in measures of fibromyalgia symptom severity, pain interference, depression, and sleep quality. However, treatment outcomes did not differ significantly between groups. These findings provide preliminary evidence that gamma-frequency rhythmic vibroacoustic stimulation may decrease fibromyalgia symptoms and ease associated comorbidities, opening new avenues for further investigation of the effects of rhythmic sensory stimulation on chronic pain conditions

    Effects of Rhythmic Sensory Stimulation on Ehlers–Danlos Syndrome: A Pilot Study

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    Ehlers–Danlos syndrome (EDS) is a connective tissue disorder characterized by joint hypermobility and skin extensibility and is often accompanied by chronic pain. Rhythmic sensory stimulation (RSS) can be defined as the stimulation of the senses in a periodic manner within a range of low frequencies. Music plus sound delivered through a vibroacoustic device is a form of RSS and has demonstrated utility in managing pain. In this current study, we conducted an open-label pilot study of 15 patients with hypermobile EDS using RSS as the intervention. Posttreatment improvements were seen in 11 of the 15 patients (73%), whereas 3 of the 15 patients (20%) experienced worse outcomes. Of the 14 patients that completed the experiment, 6 participants (43%) were classified as “responders” to the device while 8 participants (57%) were classified as “nonresponders.” Responders demonstrated significant improvements in pain interference (51.5 ± 16 preintervention vs. 43.5 ± 16.4 postintervention BPI score) and depression symptoms (34.0 ± 15.9 preintervention vs. 26.8 ± 12.1 postintervention CESD score). Poststudy interviews confirm the improvements of pain interference, mood, and bowel symptoms. Furthermore, analysis of medical conditions within the responder group indicates that the presence of depression, anxiety, irritable bowel syndrome, and fibromyalgia may indicate a greater likelihood for patients to benefit with vibroacoustic applications. These results indicate a possible potential for RSS, delivered using a vibroacoustic device, in managing pain-related symptoms. Further research is necessary to elucidate the exact mechanism behind the physiological benefits of RSS.Peer Reviewe

    Music as a Sleep Aid in Fibromyalgia

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    BACKGROUND: Interventions to improve sleep in fibromyalgia may generalize to improvements in multiple symptom domains. Delta-embedded music, pulsating regularly within the 0.25 Hz to 4 Hz frequency band of brain wave activity, has the potential to induce sleep.OBJECTIVES: To assess the effects of a delta-embedded music program over four weeks for sleep induction in patients with fibromyalgia.METHODS: The present unblinded, investigator-led pilot study used a within-subject design. Analysis was based on 20 individuals with fibromyalgia who completed the study, of the 24 recruited into the study. The primary outcome variables were the change from baseline in Fibromyalgia Impact Questionnaire (FIQ) and Jenkins Sleep Scale scores. A patient global impression of change was measured on a seven-point Likert scale. Secondary outcome measures, comprised of items 5, 6 and 7 of the FIQ, were used as indicators of pain, tiredness and being tired on awakening.RESULTS: The FIQ median score of 76.4 (95% CI 61.3 to 82.1) at baseline improved to 60.3 (95% CI 53.1 to 72.0; P=0.004). The Jenkins Sleep Scale median value of 17.5 (95% CI 15.5 to 18.5) at baseline fell to 12.5 (95% CI 8.5 to 14.5; P=0.001) at study completion. The outcomes of the patient global impression of change ratings were mostly positive (P=0.001). Being tired on awakening declined significantly from a median of 9.0 (95% CI 8.0 to 10.0) to 8.0 (95% CI 5.5 to 9.0; P=0.021). However, there was no significant improvement in pain level (baseline median 7.5 [95% CI 7.0 to 8.5] versus study completion median 7.0 [95% CI 6.5 to 8.0]; P=0.335) or tiredness (baseline median 9.0 [95% CI 8.0 to 9.5] versus study completion median 8.0 [95% CI 6.0 to 8.5]; P=0.061). There were no serious adverse events.CONCLUSIONS: Delta-embedded music is a potential alternative therapy for fibromyalgia.Peer Reviewe
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