Tootfinder

Aeolian erosion in protoplanetary discs: How impactful it is on dust evolution?
St\'ephane Michoulier, Jean-Fran\c{c}ois Gonzalez, Evgeni Grishin, Cl\'ement Petetin
https://arxiv.org/abs/2402.17439

Aeolian erosion in protoplanetary discs: How impactful it is on dust evolution?
Context: Many barriers prevent dust to form planetesimals via coagulation in protoplanetary discs, such as bouncing, collisional fragmentation or aeolian erosion. Modelling dust and the different phenomena that can alter its evolution is therefore needed. Multiple solutions have been proposed, but still need to be confirmed. Aims: In this paper, we explore the role aeolian erosion plays in the evolution of dust. Methods: We use a monodisperse model to account for dust growth and fragmentati…

Soil Fertility Prediction Using Combined USB-microscope Based Soil Image, Auxiliary Variables, and Portable X-Ray Fluorescence Spectrometry
Shubhadip Dasgupta, Satwik Pate, Divya Rathore, L. G. Divyanth, Ayan Das, Anshuman Nayak, Subhadip Dey, Asim Biswas, David C. Weindorf, Bin Li, Sergio Henrique Godinho Silva, Bruno Teixeira Ribeiro, Sanjay Srivastava, Somsubhra Chakraborty

Soil Fertility Prediction Using Combined USB-microscope Based Soil Image, Auxiliary Variables, and Portable X-Ray Fluorescence Spectrometry
This study explored the application of portable X-ray fluorescence (PXRF) spectrometry and soil image analysis to rapidly assess soil fertility, focusing on critical parameters such as available B, organic carbon (OC), available Mn, available S, and the sulfur availability index (SAI). Analyzing 1,133 soil samples from various agro-climatic zones in Eastern India, the research combined color and texture features from microscopic soil images, PXRF data, and auxiliary soil variables (AVs) using a…

Early Planet Formation in Embedded Disks (eDisk) XIII: Aligned Disks with Non-Settled Dust Around the Newly Resolved Class 0 Protobinary R CrA IRAS 32
Frankie J. Encalada (Insa Choi), Leslie W. Looney (Insa Choi), Shigehisa Takakuwa (Insa Choi), John J. Tobin (Insa Choi), Nagayoshi Ohashi (Insa Choi), Jes K. J{\o}rgensen (Insa Choi), Zhi-Yun Li (Insa Choi), Yuri Aikawa (Insa Choi), Yusuke Aso (Insa Choi), Patrick M. Koch (Insa Choi), Woojin Kwon (Insa Choi), Shih-Ping Lai (Insa Choi), …

Early Planet Formation in Embedded Disks (eDisk) XIII: Aligned Disks with Non-Settled Dust Around the Newly Resolved Class 0 Protobinary R CrA IRAS 32
Young protostellar binary systems, with expected ages less than $\sim$10$^5$ years, are little modified since birth, providing key clues to binary formation and evolution. We present a first look at the young, Class 0 binary protostellar system R CrA IRAS 32 from the Early Planet Formation in Embedded Disks (eDisk) ALMA large program, which observed the system in the 1.3 mm continuum emission, $^{12}$CO (2-1), $^{13}$CO (2-1), C$^{18}$O (2-1), SO (6$_5$-5$_4$), and nine other molecular lines th…

Sources: Baidu Venture is in talks to sell its stakes in US startups, including AI robotics startup Machina Labs, to US buyers, as US-China relations sour (Juro Osawa/The Information)
https://www.theinformation.com/articles/as

As China-U.S. Relations Sour, Baidu’s VC Affiliate Tries to Sell Its U.S. Startup Stakes
A venture capital firm backed by Chinese internet firm Baidu is in talks to sell a portfolio of stakes in a range of U.S. startups, including artificial intelligence robotics startup Machina Labs, whose customers include the U.S. Air Force, according to two people with knowledge of the matter. ...

A new metric for the comparison of permittivity models in terahertz time-domain spectroscopy
Romain PerettiPHOTONIQUE THz - IEMN, IEMN, PHOTONIQUE THZ - IEMN, M\'elanie LavancierPHOTONIQUE THz - IEMN, PHOTONIQUE THZ - IEMN, IEMN, Nabil Vindas-YassinePHOTONIQUE THz - IEMN, PHOTONIQUE THZ - IEMN, IEMN, Juliette VlieghePHOTONIQUE THZ - IEMN, IEMN, Theo HannottePHOTONIQUE THZ - IEMN, IEMN, Jean-Fran\c{c}ois LampinPHOTONIQUE THZ - IEMN, IEMN, Fran\c{c}ois OrieuxL2S

A new metric for the comparison of permittivity models in terahertz time-domain spectroscopy
We present a robust method, as well as a new metric, for the comparison of permittivity models in terahertz timedomain spectroscopy (THz-TDS). In this work, we perform an extensive noise analysis of a THz-TDS system, we remove and model the unwanted deterministic noises and implement them into our fitting process. This is done using our open-source software, Fit@TDS, available at : https://github.com/THzbiophotonics/Fit-TDS. This work is the first step towards the derivation of uncertainties, a…