Results 1 to 10 of about 396,060 (167)

Size-exclusion chromatography as a useful tool for the assessment of polymer quality and determination of macromolecular properties

Chemistry Teacher International, 2021
Polymers, macromolecules in nature and bio-polymers like proteins and antibodies are present in our every-day life and play an important role in our economy.
Held Daniela, Kilz Peter
doaj   +1 more source

Demonstration of the Systematic Evaluation of an Optical Lattice Clock Using the Drift-Insensitive Self-Comparison Method

Applied Sciences, 2021
The self-comparison method is a powerful tool in the uncertainty evaluation of optical lattice clocks, but any drifts will cause a frequency offset between the two compared clock loops and thus lead to incorrect measurement result.
Chihua Zhou, Xiaotong Lu, Benquan Lu, Yebing Wang, Hong Chang   +4 more
doaj   +1 more source

Demonstration of a time scale with the 87Sr optical lattice clock at NTSC

AIP Advances, 2023
Optical clocks have been applied to the generation of time scales since they provide superb uncertainty and instability in recent years. This paper presents the simulations about the impact of the optical clock’s operational strategies on the performance
Qinfang Xu, Shanhe Wang, Xiaotong Lu, Feng Guo, Jingjing Xia, Yebing Wang, Hong Chang   +6 more
doaj   +1 more source

Analisis Pelayanan Penerbitan Surat Izin Mendirikan Bangunan (IMB) di Dinas Penanaman Modal Pelayanan Terpadu Satu Pintu Dan Tenaga Kerja Kota Sungai Penuh

JAKP (Jurnal Administrasi dan Kebijakan Publik), 2022
This research was conducted at the One Stop Integrated Service and Manpower Investment Service (DPMPTSPTK) Sungai Penuh City. This research was conducted to find out how the implementation of IMB (building permit) granting in various forms of IMB and to ...
Fandi Esa Primadi, Rudi Febrianmansyah, Jafrinur Jafrinur   +2 more
doaj   +1 more source

382 mW External-Cavity Frequency Doubling 461 nm Laser Based on Quasi-Phase Matching

Photonics, 2023
To rapidly improve strontium optical clocks, a high-power, high-efficiency, and high-beam-quality 461 nm laser is required. In blue lasers based on periodically poled KTiOPO4 crystals, the optical absorption in the crystals can induce thermal effects ...
Yingxin Chen, Guodong Zhao, Wei Tan, Hong Chang   +3 more
doaj   +1 more source

Experimental Observation of the Suppression of the Dephasing in a Floquet Engineering Optical Lattice Clock

Applied Sciences, 2022
Accurately manipulating quantum states is a fundamental strategy for improving the performance of quantum metrology, computing, and simulation. However, the quantum state is susceptible to dephasing due to the temperature and density of the atomic ...
Feng Guo, Xiaotong Lu, Chihua Zhou, Hong Chang   +3 more
doaj   +1 more source

Development of an Interference Filter-Stabilized External-Cavity Diode Laser for Space Applications

Photonics, 2020
The National Time Service Center of China is developing a compact, highly stable, 698 nm external-cavity diode laser (ECDL) for dedicated use in a space strontium optical clock. This article presents the optical design, structural design, and preliminary
Linbo Zhang, Tao Liu, Long Chen, Guanjun Xu, Chenhui Jiang, Jun Liu, Shougang Zhang   +6 more
doaj   +1 more source

RELATIONSHIP BETWEEN INFRASTRUCTURE AND HUMAN RESOURCES WITH MINIMUM SERVICE STANDARDS IN EMERGENCY INSTALLATION

Nurse and Health, 2021
Background: Hospital Minimum Service Standards (SPM) are provisions for hospitals issued by the Minister of Health of the Republic of Indonesia in the context of government efforts to ensure the quality of hospital services. This Minimum Service Standard
Desak Nyoman Suartini, Andi Syamsul Bachri Jamal, Anas Budi   +2 more
doaj   +1 more source

Efforts towards a low-temperature-sensitive physics package for vapor cell atomic clocks

Satellite Navigation, 2020
Strong environmental dependence is an intractable problem for vapor cell clocks, for which the high-temperature sensitivity of the physics package is considered one of the dominant reasons.
Qiang Hao, Wenxiang Xue, Feng Xu, Kemu Wang, Peter Yun, Shougang Zhang   +5 more
doaj   +1 more source

An Evaluation of the Zeeman Shift of the ⁸⁷Sr Optical Lattice Clock at the National Time Service Center

Applied Sciences, 2020
The Zeeman shift plays an important role in the evaluation of optical lattice clocks since a strong bias magnetic field is applied for departing Zeeman sublevels and defining a quantization axis.
Xiaotong Lu, Mojuan Yin, Ting Li, Yebing Wang, Hong Chang   +4 more
doaj   +1 more source