Expression of protein phosphatase 4 in different tissues under hypoxia by Yanyan Ma, Jing Hou, Dengliang Huang, Yaogang Zhang, Zhe Liu, Meiyuan Tian

“…The simulated high-altitude hypoxia induced an increase of PP4C expression level in all tissues, and the expression in the lung tissue was twice as expressed as heart and brain tissue at high altitude (P < 0.05). …”
Get full text

Density-Based Spatial Clustering of Applications with Noise (DBSCAN) and Principal Component Analysis (PCA) for Anomaly Detection by Hanna Arini Parhusip, Suryasatriya Trihandaru, Bambang Susanto, Adrianus Herry Heriadi, Petrus Priyo Santosa, Yohanes Sardjono, Johanes Dian Kurniawan

“…The results demonstrate that altitude dominates as the first feature. Finally, the research concludes that altitude, PM 1.0, and PM 2.5 are the dominant features. …”
Get full text

Les aqueducs de Lyon à l’approche de la ville antique by Emmanuelle Dumas

“…It arrived there at an altitude of 305.80 m and left at an altitude of 301.60 m. …”
Get full text

Thermospheric Neutral Density Variation During the “SpaceX” Storm: Implications From Physics‐Based Whole Geospace Modeling by Dong Lin, Wenbin Wang, Katherine Garcia‐Sage, Jia Yue, Viacheslav Merkin, Joseph M. McInerney, Kevin Pham, Kareem Sorathia

“…Along the Starlink satellite orbit in the middle thermosphere (∼200 km altitude), MAGE predicts up to 150% density enhancement near the second storm peak while standalone TIEGCM, NRLMSIS 2.0, and DTM‐2013 suggest only ∼50% increase. …”
Get full text

Investigation of the Physical Mechanisms of the Formation and Evolution of Equatorial Plasma Bubbles During a Moderate Storm on 17 September 2021 by Kun Wu, Liying Qian, Wenbin Wang, Xuguang Cai, Joseph M. Mclnerney

Get full text

Das Ende der kolonialen Epoche im Himalaya by Anna Okopińska

“…As residents of high-altitude settlements experienced in pastoral and hunting activities in the surrounding mountains, they had a natural physical advantage over Westerners. …”
Get full text

Social and Institutional Status of Area Exclosure in North Wollo and Waghemira Zones, Northeastern Ethiopia by Melkamu Kassaye Mekonen, Abrham Abiyu Hailu, Asmamaw Alemu Abitew

“…In the highland and mid-altitude areas, local communities have the right to use exclosure for multiple uses. …”
Get full text

Comparison of Field and Virtual Vegetation Surveys Conducted Using Uncrewed Aircraft System (UAS) Imagery at Two Coastal Marsh Restoration Projects by Aaron N. Schad, Molly K. Reif, Joseph H. Harwood, Christopher L. Macon, Lynde L. Dodd, Katie L. Vasquez, Kevin D. Philley, Glenn E. Dobson, Katie M. Steinmetz

“…The number of species identified increased by approximately two-fold going from RGB to Anafi low-altitude imagery and another two-fold from Anafi low-altitude imagery to field data. …”
Get full text

Analysis and Optimization of Machining Process of Thin-wall Gear Ring of Planetary Reducer by Bin Liu, Lilin Wei, Haodong Yang, Changfeng Yan, Fuqiang Ren, Wei Luo

“…Engineering practice shows that this optimization scheme is suitable for low-speed and heavy-duty high-altitude rescue vehicle slewing mechanism reducer， and has high economic and practicality.…”
Get full text

Thin Air Resulting in High Pressure: Mountain Sickness and Hypoxia-Induced Pulmonary Hypertension by Jan Grimminger, Manuel Richter, Khodr Tello, Natascha Sommer, Henning Gall, Hossein Ardeschir Ghofrani

“…With rising altitude the partial pressure of oxygen falls. This phenomenon leads to hypobaric hypoxia at high altitude. …”
Get full text

Autonomous Quadcopter Image Processing for Simulated Search and Rescue Flights by Budi Hartono, Muhammad Rizki Zuhri, Citra Asti Rosalia, Nofrijal Fauzan

“…Research parameters include marker diameter, flight altitude, and quadcopter speed. The results show successful marker detection at a flying altitude of up to 3 meters above the ground and reaching a top speed of 3 m/s at a flying altitude of 2 meters.…”
Get full text

Drone detection method based on K-Medoids to extract channel state characteristics by SONG Lingyu, PAN Peng, LIU Tianle

“…Effective management of low-altitude targets is key to promot the development of the low-altitude economy. …”
Get full text

Prescribed Performance Tracking Control for Hypersonic Flight Vehicles with Model Uncertainties by Siyuan Zhao, Xiaobing Li, Xiangwei Bu, Dongyang Zhang

“…Firstly, a HFV longitudinal motion model is decomposed into a velocity subsystem and an altitude subsystem. Meanwhile, considering the uncertainties of the model, the velocity subsystem and altitude subsystem are directly expressed as the forms with unknown nonaffine functions. …”
Get full text

Tree-ring chronologies of Picea abies, Larix decidua and Fagus sylvatica along altitudinal gradients by Klemen Novak, Martin de Luis, Nina Škrk, Aleš Straže, Katarina Čufar

“… The dendrochronological climate signal of Norway spruce (Picea abies), European larch (Larix decidua), and European beech (Fagus sylvatica), among others, depends on altitude, therefore we have to collect dendrochronological data systematically for each species along altitude gradients. …”
Get full text

Fruit Detection and Yield Mass Estimation from a UAV Based RGB Dense Cloud for an Apple Orchard by Marius Hobart, Michael Pflanz, Nikos Tsoulias, Cornelia Weltzien, Mia Kopetzky, Michael Schirrmann

“…Model coefficients of determination ranged from 0.41 for data captured at an altitude of 7.5 m for 2018 to 0.40 and 0.53 for data from a 10 m altitude, for 2018 and 2020, respectively. …”
Get full text

Modeling and Stable Operation Control Method for Airborne Wind Energy System Considering Longitudinal Disturbance Stability by Bixiong LUO, Junliang HU, Yajun YANG, Zongdong REN, Yadong HE

“…In a simulated environment replicating high-altitude wind fields subjected to longitudinal disturbances, the study employed kite attitude control to design synchronous control laws, enabling trajectory tracking and ensuring operational safety of the kite-based system.…”
Get full text

Physiological variables associated with the development of acute mountain sickness at the South Pole by Paul J Anderson, Bruce D Johnson, Michael F Harrison, Andrew D Miller, Kathy A O'Malley, Maile L Richert, Jacob B Johnson

“…Objectives The Antarctic Study of Altitude Physiology (ASAP) investigated variables associated with the development of AMS in adults experiencing rapid passive transport to altitude by airplane.Design Our prospective observational trial collected data, including personal history, anthropometrics, vital signs, blood samples and pulmonary function, at sea level and at altitude. …”
Get full text

Occurrence of Ionospheric Equatorial Ionization Anomaly at 840 km Height Observed by the DMSP Satellites at Solar Maximum Dusk by Jiacheng Li, Yiding Chen, Libo Liu, Huijun Le, Ruilong Zhang, He Huang, Wenbo Li

“…Abstract Although it is accepted that the electron density double peaks of the Equatorial Ionization Anomaly (EIA) generally merge into a single‐peak with increasing altitude and thus the signature of EIA becomes inconspicuous in the higher topside ionosphere, it is still unclear that to what altitudes the double‐peak structure can extend. …”
Get full text

An Obstacle Avoidance Scheme Maintaining Connectivity for Micro-Unmanned Aerial Vehicles by Hyo Hyun Choi, HyunSoo Choi, Myungwhan Choi, Taeshik Shon, ByoungSeob Park

“…To achieve this goal, directly after the UAVs avoid the obstacle at a raised altitude above it, they fly at a higher altitude for a while and then descend to their original height. …”
Get full text

Comparison of physical activity levels in people with chronic obstructive pulmonary disease and healthy subjects residing in hypobaric hypoxia environments by Wilder A Villamil-Parra

“… # Objective To compare physical activity levels in individuals with COPD versus healthy subjects residing in high-altitude environments. # Methods Individuals with COPD GOLD 1(A, B) and control subjects residing at high altitudes (\>2500m) were studied. …”
Get full text