2,762 research outputs found
Oxidative stress induced by humic acid solvent extraction fraction in cultured rabbit articular chondrocytes.
No full textExpression, purification and DNA-binding activity of tilapia muscle-specific transcription factor, MyoD, produced in Escherichia coli.
No full textxidative injury induced by synthetic humic acid polymer and monomer in cultured rabbit articular chondrocyte.
No full textApplication of HJ-1B Data in Monitoring Water Surface Temperature
No full textAbstractThe water surface temperature (WST) regarded as an important indicator of water environment, have been obtained from remotely sensed thermal data widely. One thermal band of the new HJ-1B satellite, provided with relatively both high temporal and spatial resolution may provide us a good chance for water thermal dynamic study. The suitability of HJ-1B data was evaluated, in simultaneously obtaining WST for large area, through a case study in Wuhan city. WSTs retrieved by different methods were compared with the MOD 11 product and the in situ measurements. Validation results show that more accurate result was obtained by using the revised single channel (Re_SC) algorithm, with the root mean square error (RMSE) and systematic error (SE) were 0.73K and -0.17K compared with the MOD 11. Its’ advantages in spatial and temporal resolution make the HJ-1B imageries to be an useful data source for monitoring water environment, as far as some related issues are resolved properly
Konstruksi Pemikiran Filsafat Matematika The Liang Gie dalam Dunia Pendidikan
Full text linkNurhayani. 2012. Konstruksi Pemikiran Filsafat Matematika The Liang Gie dalam Dunia Pendidikan. Skripsi, Jurusan Pendidikan Matematika, Fakultas Tarbiyah. Pembimbing: (I) Dra. Hj. Sessi Rewetty Rivilla, M. M.Pd., (II) Hasby Assidiqi, S. Pd. M. Si.
Filsafat Matematika adalah sebuah kajian filosofis yang menjadi objek sasarannya yaitu matematika. Filsafat matematika merupakan topik yang menarik untuk dianalisis secara rasional karena mengingat pentingnya bagi dunia pendidikan
Penelitian ini meneliti tentang Filsafat Matematika karya The Liang Gie. Dalam Penelitian ini dideskripsikan tentang konstruksi dari pemikiran filsafat matematika dalam buku The Liang Gie yang berjudul “Filsafat Matematika”. Interpretasi dari konstruksi pemikiran filsfat matematika tersebut dijabarkan dalam ranah matematika, yaitu aljabar (Sistem Persamaan Linear Dua Variabel).
Tujuan Penelitian ini adalah untuk mengetahui konstruksi dari pemikiran Filsafat Matematika dalam karya The Liang Gie, serta implikasinya dalam dunia pendidikan khususnya pembelajaran matematika (proses belajar-mengajar).
.Penelitian ini menggunakan metode kualitatif yang sifatnya deskriptif. Penelitian ini dilaksanakan dengan bentuk penelitian kepustakaan (library research). Teknik yang digunakan yakni penelusuran sumber-sumber terkait, penulisan dari sumber-sumber yang sesuai, menerangkan informasi dari sumber-sumber yang sesuai dan analisis. Subjek penelitian ini adalah analisis dari pemikiran filsafat itu sendiri beserta sejumlah literatur yang berhubungan dengan masalah yang diteliti. Adapun objek penelitian ini adalah Filsafat Matematika dalam buku The Liang Gie.
Berdasarkan hasil analisis data, diperoleh simpulan bahwa konstruksi pemikiran Filsafat Matematika dalam buku The Liang Gie, membagi atas tujuh kajian objek meliputi epistemologi matematika, ontologi matematika, metodologi matematika, struktur logis dari matematika, implikasi etis dari matematika, aspek estetis dari matematika dan peranan matematika dalam sejarah peradaban manusia.
Implikasi dari Filsafat Matematika dalam dunia pendidikan khususnya pembelajaran matematika bisa dilihat dalam proses belajar mengajar. Dalam enam prinsip dasar dan standar matematika sekolah meliputi prinsip pengajaran dan pembelajaran. Filsafat Matematika menjadi solusi yang efektif dan efisien dalam menambah koleksi seni mengajar bagi guru matematika, untuk menarik minat siswa dalam belajar matematika
Modeling and time delay control of shape memory alloy actuators
No full textShape memory alloy (SMA) actuators possess hard nonlinearities including backlash-like hysteresis and saturation. These nonlinearities result in steady-state error and limit-cycle problems when conventional controllers such as the proportional integral derivative (PID) are used for trajectory control. In this study, a dynamics for an SMA actuator was newly derived using the modified Liang's model. The derived dynamics showed continuity at the change of the phase transformation process, but the original model could not. SMA actuator characteristics could be well described using this dynamics. The derived dynamics could be also used effectively for the prediction of control performance and gain tuning of the time delay control (TDC). The dynamics consisted of first-order linear and second-order nonlinear equations. Accordingly, a control strategy was established for the TDC to regulate only the second-order nonlinear part for simplicity and for the internal closed loop to regulate the rest. The control strategy was examined from the point of view of influence of an anti-windup scheme and high gain tuning on control performance. An anti-windup scheme was essential to protect windup phenomenon and high gain tuning was effective when a temperature disturbance existed. In the robustness test, the TDC with high gains showed robustness to inertia variation and temperature disturbance in comparison with the TDC with low gains
Time delay control of a shape memory alloy actuator
No full textShape memory alloy (SMA) actuators have attractive advantages such as high power to volume ratio. However, they also have hard nonlinearities including backlash-like hysteresis and saturation. These nonlinearities result in steady-state errors and limit cycle problems when conventional controllers are used for trajectory control. In this paper, time delay control (TDC) is applied to SMA actuators. The TDC is a well-known robust nonlinear controller and does not require a precise mathematical plant model. The dynamics of an SMA actuator was derived based on Liang's model. This dynamics does not only describe the characteristics of SMA actuators very effectively but also helps tune the TDC gains. A control strategy for the SMA actuator was established and examined from the point of view of the influence of an anti-windup scheme and high gain tuning on the control performance. We also conducted experiments on the position control of the SMA actuator and show the results of the TDC in comparison with other control schemes
EVALUATION ON CONSISTENCY BETWEEN HJ-1 CCD AND TM IMAGES IN MONITORING FRACTIONAL GREEN VEGETATION COVER
No full textThe fractional green vegetation cover (Fc) is an important climate model parameter. Remote sensing technique has become one of the most effective means to acquire vegetation dynamics information. The CCD cameras onboard HJ-1 satellites (Environment and Disaster monitoring and forecasting Satellite constellation) are advanced in revisit frequency and image coverage compared with Landsat TM. This study aims to assess the capability of HJ-1 CCD images in monitoring of Fc in terms of comparing with the widely used TM images. The quality of HJ-1 CCD is compared with the same temporal TM image in two aspects: the image statistical analysis and the image application analysis. After the comparison between the HJ-1 CCD image and TM image of the same area. The results show a high level of uniform between HJ-1 and TM images. Therefore, the conclusion may be drawn that the HJ-1 CCD image is feasible and suitable for Fc monitoring.Engineering, Electrical & ElectronicGeosciences, MultidisciplinaryRemote SensingEICPCI-S(ISTP)
Assessment of the Radiometric Performance of Chinese HJ-1 Satellite CCD Instruments
No full textData from the Chinese Huan-Jin (which means 'environment') 1 satellites, HJ-1A and HJ-1B, have been widely used for environmental, disaster monitoring and other applications. However, the radiometric properties of their CCD sensors have not been well assessed. In this study, we evaluated the radiometric performance of the HJ-1A/B CCD sensors by comparing their top-of-atmosphere (TOA) reflectance with those of three other satellite sensors - the Landsat-5 Thematic Mapper (TM) because of its long-term stable radiometric calibration, the Earth Observer-1(EO-1) Advanced Land Imager (ALI), and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) - in four bands from the visible to near infrared spectrum over different landscapes. The results demonstrate that the radiometric performance of the HJ-1A/B CCD sensors is close to that of the Landsat-5 TM, ALI, and ASTER sensors, with the mean R2 values ranging from 0.95 to 0.96 (TM), 0.92-0.95 (ALI) and 0.87-0.93 (ASTER), and the mean normalized root mean square error values from 0.05-0.08 (TM), 0.05-0.09 (ALI) and 0.05-0.06 (ASTER). We further assessed the quality of HJ-1 CCD data using four image statistics and found that the image quality is very similar to that of the Landsat-5 TM. © 2008-2012 IEEE.link_to_subscribed_fulltex
Internal Calibration of HJ-1-C Satellite SAR System
No full textThe HJ-1-C satellite is a Synthetic Aperture Radar (SAR) satellite of a small constellation for environmental and disaster monitoring. At present, it is in orbit and working well. The SAR system uses a mesh reflector antenna and centralized power amplifier, and has an internal calibration function in orbit. This study introduces the internal calibration modes and signal paths. The design and realization of the internal calibrator are discussed in detail. Finally, the internal calibration data acquired in orbit are also analyzed
- …
