Chinese Science Bulletin

In this paper we will study complex functions of a complex variable. We will see that differentiability of such a function is a non-trivial prop- erty, giving rise to the concept of an analytic function. We will then studymany examples of analytic functions. This topic’s primary objective is to define and list a few key characteristicsof complex analytic functions. If a function f (z) has a complex derivativef(z), then it is analytic. In this paper we will study complex functions of a complex variable. We will see that differentiability of such a function is a non-trivial prop- erty, giving

This study uses the Ambient Noise Tomography (ANT) method to describe the Rayleigh wave velocity model on the subsurface seismic structure of Java Island which has complex tectonic conditions. The data used in this study is waveform data on the vertical component of 99 BMKG stationary seismic sensor networks spread across Java Island in 2021. Waveform data processing is carried out starting from single data preparation, cross correlation and stacking, cross correlation analysis, curve dispersion measurement, group velocity tomography and the last is the interpretation of the results of the stu

Tarutung is an earthquake-prone area due to the geotectonic and geological conditions of Tarutung, which is traversed by the Renun segment and the active Toru fault, and is dominated by volcanic rocks, with podzolic-type soils that are very sensitive to erosion. The Tarutung earthquake that occurred on Saturday, October 1, 2022, at 02:28:41 WIB with a magnitude of 6.0 Mw, has caused a lot of damage and casualties in a number of North Tapanuli sub-districts. In this study, the multitemporal DInSAR (Differential Interferometry Synthetic Aperture Radar) method was used to observe the deformation

The fashion industry is one of the potential industries in Indonesia and will continue to grow along with population growth. The fast fashion trend requires the clothing production system to be fast-paced; apart from that, it is also supported by consumers' habit of frequently buying new apparel and throwing away various underused clothes that can produce clothing waste, which impacts the environment. Therefore, implementing a circular economy can solve this problem by upcycling clothing to reduce excessive consumption and extend clothing life. This research uses the Theory Reasoned Action mod

Efforts were made to improve the performance of the combined electrocoagulation-photocatalysis process by modifying the photocatalyst. A nanotube array morphology photocatalyst using TiO2 (Titania Nanotube Array, TNTA) was combined with CdS to achieve a type II heterojunction mechanism capable of suppressing the electron and hole recombination rate, thereby improving the photocatalytic performance. Various characterization results, including XRD, HRTEM, FESEM, UV Vis DRS, and XPS, showed the successful formation of the CdS/TNTA nanocomposite. Observation results indicated that in the single ph