Space Exploration and Technology

Recent research at Stanford University has led to the identification of a class of paraffin-based fuels that burn at surface regression rates that are three to four times that of conventional hybrid fuels. The approach involves the use of materials that form a thin, hydrodynamically unstable liquid layer on the meltin…

• MUSTAFA ARİF KARABEYOĞLU

Spaceflight is known to diminish bone mass and reduce immune function, suggesting that repair of connective tissue might be impaired in a microgravity environment. Fisher 344 rats were used to test wound healing responses in the orbiting Space Shuttle Endeavour by preflight implantation of polyvinyl acetal sponge disk…

BACKGROUND: Long duration spaceflight (i.e., 22 days or longer) has been associated with changes in sensorimotor systems, resulting in difficulties that astronauts experience with posture control, locomotion, and manual control. The microgravity environment is an important causal factor for spaceflight induced sensori…

• BURAK ERDENİZ

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• KÜRŞAD ÖZDEMİR

INTRODUCTION: Selective serotonin reuptake inhibitors (SSRIs) are popularly prescribed for treating depression. With a few exceptions, these psychotropic medications are not approved by aeromedical regulatory authorities for use by aviators. Since SSRIs have the potential for impairing performance and causing drug-dru…

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Civil Engineering is getting prepared for operations in space. The Moon will presumably be the focal point in this new era. Civil Engineering professionals, in close cooperation with other scientists and engineers are in the phase of planning operations on the Moon. The experience gained on the Earth through four mill…

INTRODUCTION: Selective serotonin reuptake inhibitor (SSRI) antidepressants are popularly prescribed, but these drugs are not currently approved for use by U.S. civilian aviators. In a 2003 study, the presence of 4 SSRIs--citalopram, fluoxetine, paroxetine, and sertraline-was reported in 61 pilot fatalities of civil a…

Low fuel regression rate is one of the major drawbacks of hybrid rocket motors. In this study, a novel injector concept is proposed to provide a substantial enhancement in the fuel regression rate. A tubular injector, Distributed Tube Injector (DTI), is inserted in the center of the cylindrical fuel port in order to t…

• İBRAHİM ÖZKOL

This paper presents a simplified model of the space shuttle main engine (SSME) dynamics valid within the range of operation of the engine. This model is obtained by linking the linearized point models obtained at twenty five differenc operating points of the SSME. The simplified model was developed for use with a mode…

TOI-2015 is a known exoplanetary system around an M4 dwarf star, consisting of a transiting sub-Neptune planet in a 3.35-day orbital period, TOI-2015 b, accompanied by a non-transiting companion, TOI-2015 c. High-precision radial-velocity measurements were taken with the MAROON-X spectrograph, and high-precision photo…

• SELÇUK YALÇINKAYA

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• CENGİZ HACIZADE