Air Force Base Research Articles

Основні питання створення моделі процесу технічної експлуатації повітряного судна військового призначення

The subject of the research in this article is the creation of a mathematical model of the process of technical operation (PTO) of a military aircraft in the system of information support for the operation of an aircraft. The aircraft is a complex technical system that includes many systems, subsystems, and elements for reliable and error-free functioning, which require constant monitoring of its technical condition to determine the possibility of its intended use. It is proposed to promote PTO in the system of information support for the operation of aircraft operating in real time and to create a mathematical model of the process. We will construct a graph of states and transitions using the transition matrix to describe the PTO of a military aircraft. The purpose of this study is to create a mathematical model of the PTO of a military aircraft in a system of information support for the operation of the aircraft operating on a real time scale. The task: to determine the role and advantage of using the mathematical model of the PTE of a military aircraft in the information support system for the operation of a CMMS-type aircraft operating in real time for its use in forecasting and managing the effectiveness of the PTE. The scientific and practical novelty of the obtained results is as follows: the advantages of the PTE mathematical model of a military aircraft in the CMMS-type aircraft operation information support system, which works in real time before the PTO model by resource and the model when decisions are made at the moment, have been determined state changes. The conclusion of this study is that the use of the proposed PTO model will allow us to evaluate complex reliability indicators in real time, that is, continuously. The considered PTO model of a military aircraft considers all the features of military aircraft operation at the current stage. This allows us to assume the possibility of its use for the entire aircraft fleet of the Air Force Base of the Armed Forces of Ukraine.

Optimizing Undergraduate Pilot Training 2.5 at Vance Air Force Base

With a continued increase in demand for qualified pilots, in an environment of continual budget constraints, the Air Education Training Command has been searching for ways to streamline Undergraduate Pilot Training (UPT). Leadership has recently implemented UPT 2.5 to train pilots more effectively. However, the 8th and 33rd Flight Training Squadrons at Vance Air Force Base have had issues efficiently cycling students through. Although UPT 2.5 specifies that it takes no more than 90 days for students to complete the post-preflight portion of the syllabus, it currently takes 126 days on average. We developed a discrete event simulation model of pilot training to identify bottlenecks in the current system, find an optimal class size given current resources, and optimize resources to graduate 32 students per class, the number required by AETC. The results will inform recommendations to increase efficiency within UPT and reduce the pilot shortage.

Aerobic biotransformation of 6:2 fluorotelomer sulfonate in soils from two aqueous film-forming foam (AFFF)-impacted sites

Although 6:2 fluorotelomer sulfonate (6:2 FTS) is a common ingredient in aqueous film-forming foam (AFFF) formulations, its environmental fate at AFFF-impacted sites remains poorly understood. This study investigated the biotransformation of 6:2 FTS in microcosms prepared with soils collected from two AFFF-impacted sites; the former Loring Air Force Base (AFB) and Robins AFB. The half-life of 6:2 FTS in Loring soil was 43.3 days; while >60 mol% of initially spiked 6:2 FTS remained in Robins soil microcosms after a 224-day incubation. Differences in initial sulfate concentrations and the depletion of sulfate over the incubation likely contributed to the different 6:2 FTS biotransformation rates between the two soils. At day 224, stable transformation products, i.e., C4C7 perfluoroalkyl carboxylates, were formed with combined molar yields of 13.8 mol% and 1.2 mol% in Loring and Robins soils, respectively. Based on all detected transformation products, the biotransformation pathways of 6:2 FTS in the two soils were proposed. Microbial community analysis suggests that Desulfobacterota microorganisms may promote 6:2 FTS biotransformation via more efficient desulfonation. In addition, species from the genus Sphingomonas, which exhibited higher tolerance to elevated concentrations of 6:2 FTS and its biotransformation products, are likely to have contributed to 6:2 FTS biotransformation. This study demonstrates the potential role of biotransformation processes on the fate of 6:2 FTS at AFFF-impacted sites and highlights the need to characterize site biogeochemical properties for improved assessment of 6:2 FTS biotransformation behavior.

Experimental design on high-speed sliding wear

This paper recounts research that develops, conducts, and analyzes an experimental design characterizing wear rates of various materials sliding at high speeds along an AISI 4340 steel rail. The work supports Holloman Air Force Base’s engineering of a more wear-resistant rocket slipper for their high-speed test track. A design of experiments approach is used to systematically identify and evaluate potential slipper attributes that mitigate wear based on a heat transfer model. Results include recommendations of slipper materials that theoretically perform similar to or better than the baseline Vascomax®C300 maraging steel as well as statistical evaluation of the finite element analysis heat transfer model of the Air Force Research Laboratory’s pin-on-disk rig.

Impact ofthe COVID-19 Pandemic onIndicators ofPsychological Health andSuicidal Ideation Within an Active Duty U.S. Military Population.

The COVID-19 pandemic has had a significant impact on the psychological health of individuals. The pandemic has contributed to increased anxiety, elevated rates of depression, and worsening suicidal ideation among civilians. Reported rates of burnout are also elevated as employees and employers adapted to ever-changing work environments, finding it increasingly difficult to maintain a work-life balance. The objective of this study is to determine how the COVID-19 pandemic impacted the psychological health and rates of suicidal ideation of active duty military personnel in the USA. A total of 2055 military personnel and military-adjacent employees stationed at a U.S. Air Force base completed a self-report survey that was administered six times from January 2020 to December 2021. Validated scales assessed measures of psychological health and suicidal ideation. General Estimating Equations were used to examine how indicators of time and psychological health predicted suicidal ideation in a military population. Life satisfaction, happiness, feeling life is worthwhile, depression severity, and suicidal ideation did not statistically change across the six time points. Worry (P < .01) and depression (P < .001) did decrease significantly, while burnout (P = .01) significantly increased across these time points. Feeling life is worthwhile significantly predicted reduced suicidal ideation (B = -.19; SE = 0.05), while depression (B = 0.11; SE = 0.03), depression severity (B = 0.24; SE = 0.05), worry (B = 0.06; SE = 0.02), and burnout (B = 0.15; SE = 0.07) predicted increased suicidal ideation. The rates of depression and worry decreased throughout the pandemic for those in the study while rates of suicidal ideation remained constant, demonstrating the potential resilience of military personnel and military-adjacent employees in response to the COVID-19 pandemic. However, burnout increased and significantly predicted elevated rates of suicidal ideation, highlighting the importance of focusing on reducing workplace stressors for military personnel.

Silver Lining Study: Missileer Fatigue Mitigation During 2020 Coronavirus Pandemic.

The U.S. Air Force's Intercontinental Ballistic Missile (ICBM) force stands ready to launch weapons 365 days per year. Since its inception, missileers vigilantly operate launch consoles on a 3-day cycle: minimum 24-hour alert-shift/24-hour travel-admin/24-hour off, leading to concerns that health, morale, and alertness are chronically impacted. In 2020, a Missileer Occupational Health Assessment (OHA) revealed 76% of respondents struggle with being rested for duty and 29% of respondents never feel adequately rested for duty. Later that year, 20th Air Force initiated long-duration operations to safeguard from the SARS CoV-2 (COVID-19) Pandemic, resulting in increased operations tempo, and exacerbating crew fatigue.341st Operations Group and 341st Medical Group at Malmstrom Air Force Base enacted interventions to mitigate crew fatigue and support continued readiness during pandemic operations. They recorded, analyzed, and compiled findings in this report, including recommendations for long-term ICBM operations at Missile Wings. All participants were Nuclear and Missile Operations Officers, or missileers, were continuously evaluated with qualitative and quantitative measures to ensure safety of the force during a period of unprecedented change. Interventions implemented and evaluated during the 9-month period included: environmental modifications, scheduling changes, and crew education on fatigue management, nutrition, anticipatory sleep preparation, and fitness. Most notably, the 341st Operations Group examined various 3-person and 4-person shift-length and alert duration schedules. Psychomotor vigilance testing results validated safety of operators and delta between pre- and post-shift measurements. Crew force readiness trends were analyzed for force-health awareness. Pre- and post-OHA results were compared for subjective changes. Fatigue and health-related outcomes were collected from a safety monitoring effort during standard and COVID-19 operations at 341st Missile Wing. Findings from qualitative and quantitative data indicate the optimal schedule is a 3-week cycle:7-day alert/7-day recovery/7-day training-administrative utilizing 4-member or 3-member crews for low tempo operations. Crews experimented with shift-lengths of 24hrs-on/24hrs-off, 16hrs-on/8hrs-off, and 12hrs-on/12hrs-off. Maximum safe alert duration is 7 days due to task fatigue onset between 8 and 10 days. Short and long duration Duties Not to Include Flight (DNIF) (also known as Duties Not to Include Alert (DNIA) among missileers) rates decreased from the first to last month of the period by 74.6% and 79.2%, respectively. The number of alerts missed per month decreased 86% from baseline. The 2021 OHA found a 7% decline in members seeking separation, and absence of sleep, fatigue, and physical or mental health as missileer concerns. This analysis has identified a sustainable alert rotation of 7/7/7 with emphasis on protected recovery and training time and has been continued after concluding pandemic operations, creating consistent schedule stability where there once was none. If executed properly, this alert rotation, regardless of shift-length selected, has potential to improve trust between crews and leadership, provides adequate recovery time between alerts to maintain health, and improves wellness, family stability, morale, unit cohesion, and crew force retention. Notably, all Air Force Global Strike Missile Operations Groups adjusted scheduling practices to align with these findings.

Plant growth forms influence sandhill longleaf pine regeneration

Longleaf pine researchers have quantified many aspects of regeneration, growth and yield, but have focused on productive sites such as pine flatwoods and upland pine. Sandhill longleaf pine woodlands represent >40 % of remnant stands of longleaf pine ecosystems; most have no history of agriculture due to poor site productivity, yet many have been degraded by resin collection, grazing and fire exclusion. Restoration of structure and function of sandhill longleaf pine depends on understanding early stand-development processes, which are governed by fire, propagule availability, and competition from a range of overstory tree species not limited to longleaf pine. We analyzed a 16-year monitoring dataset from Eglin Air Force Base in northwest Florida, USA, focusing on how four tree growth forms influenced longleaf pine juvenile stages of seedling and sapling numbers and ingrowth to the subadult size class. Analyses were done with generalized linear mixed models using Poisson, normal, or negative binomial error distributions according to the response variable.Restoration activities were effective at reducing numbers of sapling evergreen hardwoods, and basal area of overstory sand pine and other non-longleaf conifers was reduced by 35 % over the 16-year study. We observed threshold values for adult longleaf pine effects on seedlings and ingrowth; seedling numbers were maximized at 7.8 m2/ha, and ingrowth was maximum at 5.1 m2/ha. Seedling density was strongly governed by mast year. Sand pine, an invasive native pine, was detrimental to longleaf pine at all juvenile life stages even at low basal area. Deciduous oaks, which have been observed to facilitate longleaf pine seedling establishment, instead facilitated ingrowth to the subadult size class. Evergreen hardwoods, which may dampen fire behavior, only decreased longleaf pine density at the sapling stage. Ongoing silvicultural restoration activities should continue to focus on frequent fire and sand pine removal; deciduous oaks should be retained for their facilitative value; and removal of evergreen hardwoods should not be a high priority as long as prescribed fire can propagate in these lower productivity sites.

Do Only Americans Own America? Foreign Investment in Agricultural Lands in the United States

Foreign investment in the United States, while not a new phenomenon, has recently caught the attention of the American public and members of the U.S. House and Senate after an Air Force officer raised concerns when the Fufeng Group, based in Shandong, China, purchased 300 acres of farmland 12 miles from an Air Force base in Grand Forks, North Dakota, to build a corn milling plant (Javers, 2022). National security concerns prompted the U.S. Senate to propose a bill prohibiting the purchase of land in the U.S. by companies or individuals from China, North Korea, Iran, or Russia.

Investigation of the wake region behind a hemispherical turret via laser Rayleigh scattering.

Planar and volumetric density measurements in the wake region behind a mounted hemispherical turret are obtained using laser Rayleigh scattering. The measurements are conducted in a Mach 2 wind tunnel facility at the Kirtland Air Force Base. Quantitative measurements of density and contour plots with lines of constant density are computed, thus enabling visualization of the turret wake's fluid dynamics. A new, to the best of our knowledge, laser diagnostic methodology and configuration for capturing laser images is also presented. This methodology enables further suppression of background light scattering. Multi-dimensional single-shot and time-average measurements are recorded at multiple axial locations behind the turret. The images acquired reveal turbulent regions of the wake flow, and a discussion of the observed phenomena is presented.

Challenges faced by women military officers in the South African National Defence Force: A case study of the Hoedspruit Air Force Base, Limpopo

abstract The military has a deep-rooted masculine culture. One of the aspects of this masculinity, which is hegemonic in its cultural dominance, is the perspective on and perception of femininity. The masculine behaviour resents the weak; therefore, soldiers are trained not to complain or project any feminine traits, such as being caring and nurturing, or displaying ‘softness’). Soldiers need to be able to do without emotions like empathy or showing emotions of regret in order to be able to function appropriately as soldiers. Feminine attributes are looked upon as ‘weak’ or ‘soft’. For instance, attributes such as sensitivity and compassion are deemed to be in contrast to the military culture. This article aims to elucidate the challenges faced by women military officers in the South African National Defence Force in Limpopo Province. It does so by applying the liberal feminist theory. The researcher used feminist qualitative research methods and an exploratory research design, with snowball sampling used to identify 15 female officers for in-depth interviews (6 women) and a focus group discussion (9 women). Thematic analysis was used for data analysis. The findings revealed that women military officers face challenges such as gendered discrimination, racial discrimination, vigorous basic military training, and exclusion from participation in decision making. There is still much need for improvement when it comes to addressing the challenges faced by women in the military.

Air show primary sonic booms across a seismic network

Cates and Sturtevant (2002) and others have shown that sonic booms can be recorded using existing seismic networks. To revive this capability for current research, data from permanent seismic stations were utilized to extract primary sonic boom signals from known supersonic flights. The sonic booms were produced on October 14, 2022 near Edward Air Force Base, CA, associated with an Air Show corresponding to the 75th anniversary of the first supersonic flight. The sonic booms were created by F-22, F-18, and F-15 aircraft. The experimental results show that primary sonic booms were measured at different times by seismic networks in Southern California over an area of not less than 10 000 km2 (∼3900 mi2). Secondary booms did not occur during this event due to inadequate upper atmospheric winds. [Work supported by the FAA through ASCENT Project 57 under the supervision of Sandy Liu. Any opinions, findings, conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the FAA.]

Niche partitioning and the storage effect facilitate coexistence in an amphibian community.

Virtually all natural community assemblages are dominated by a handful of common species. Dominant species can exert negative impacts on biodiversity through competitive exclusion, and thus there is a strong incentive to understand imbalances in community composition, changes in dominance hierarchies through time, and mechanisms of coexistence. Pond-breeding amphibians that utilize ephemeral wetlands provide an excellent opportunity to evaluate theoretical predictions of community composition in stochastic environments. One of the most striking features of pond-breeding amphibians is the marked stochastic fluctuations in abundance across years. Given strong theoretical and empirical links between evenness and biomass, one would expect community evenness to change from year to year. Moreover, if different species exhibit different boom-and-bust reproductive cycles, then a storage effect may help to explain why one species does not outcompete all others. Here, we explore the interplay between biotic and abiotic conditions in shaping amphibian communities at two ephemeral wetlands on Eglin Air Force Base, Florida. We document consistent community composition over 6 years of monitoring, resulting from a lack of species turnover and similar responses of all community members to environmental conditions. The similar dynamics of species argues against a storage effect as the sole mechanism for coexistence and instead points to niche partitioning as a more important factor. In support of this conclusion, we show that the degree of synchrony in breeding migrations only correlates with environmental conditions within species, not between species. The lack of pattern seen between species implies that individuals are somewhat constrained in the timing of breeding migrations, perhaps owing in part to competition with other community members. We hope that our work reinvigorates interest in amphibian communities and highlights ephemeral wetlands as model systems to study community dynamics in stochastic environments.

Model, analyse and prevent fatal aircraft manoeuvres

On 24 June 1994 at Fairchild Air Force Base, during practice for an air show, a low-flying B-52H aircraft banked its wings vertically and crashed. Emphasizing the activity of modeling drag and gravity, these notes examine the possibility of recovery with several models. First, with algebra, historical data lead to a model where in a free fall near Earth's surface, the distance fallen is proportional to time squared. Calculus then gives an ordinary differential equation to model free fall near Earth's surface. Second, with calculus, historical data lead to various models of drag on objects moving through air. Third, combining models of drag and gravity with Newton's Laws of Motion leads to ordinary differential equations that model free fall in air. Fourth, predictions from such models with ordinary differential equations are consistent with the aircraft crash. Further models examine the possibility of increasing engine thrust to regain the vertical component of lift. All models fit in a first course in differential equations, without requiring any computational machinery. However, numerical experiments show how uninformed use of professional software can produce rounding errors to cause the modelled aircraft to plunge to the bottom of the deepest oceans and shoot up into space.

The Effect of Professionalism, Work Discipline and Work Environment on Performance Members of the Air Force Soldiers in the Air Force Base Cilangka Jakarta

The purpose of this study was to analyze the influence of professionalism, work discipline and work environment on the performance of members of the Air Force Disopsl or Mabesau Cilangkap Jakarta, either simultaneously or partially. This study also wants to analyze which variables of professionalism, work discipline and work environment have a dominant influence on the performance of the members of the Air Force Disopsl or Mabesau Cilangkap Jakarta. This type of research is explanatory research. The research population consisted of 40 members of the first officer of the Indonesian Air Force in the sub-district headquarters in Cilangkap, Jakarta. Considering that the population was not too large, a census study was used, namely all members of the first officer at the Disopsl or Mabesau Cilangkap Jakarta would be research respondents. The analysis method uses multiple linear regression and hypothesis testing. The results showed that professionalism, work discipline and work environment on the performance of members of the first officer of the Indonesian Air Force were employed or Headquarters in Cilangkap Jakarta, either simultaneously or partially. Furthermore, this study identifies that professionalism has a dominant effect on the performance of members of the Indonesian Air Force in the Disopsl or Cilangkap Jakarta Headquarters.

Women Representation in the Military: The Case of the South African National Defence Force, Limpopo Province

Promoting gender equality and women empowerment is a long standing item on the development agenda nationally and internationally. It is also item number five of the 2030 millennium development goals; gender equality, ending all discrimination against women and girls is not only a basic right but a human right. Research has proven that empowering women and girls helps economic growth and development. Empowering women is necessary for women’s enhancement in society and the workplace, the military is no exception. This paper argues on the gender mainstreaming policies in the South African National Defence Force (SANDF) and whether they are adequately implemented to ensure equal representation of women in all military ranks including combat. The researchers used Liberal Feminist Theory (LFT), which advocates for women’s right to be seen and acknowledged as human rights. The researchers employed a feminist qualitative research methodology and exploratory design. Snowballing sampling technique was used to select participants in the SANDF military air-force base in Hoedspruit, Limpopo and saturation was reached after the fifteenth participant for in-depth interviews. Data was analysed using Thematic Analysis (TA). Findings in the study revealed that women in the military are of the view that the military is making strides in ensuring an equal representation between men and women, however women view themselves as less represented than their male counterparts, regardless of the policies put in place. Results also revealed that that the lack of representation of women in the military is due to the SANDF not being meant for women. The paper therefore concludes that women are not equally represented to their male counterparts in the military and that there is need for improvement towards this in senior and management positions within the SANDF. The study recommends that the SANDF as a government institution could also create a sense of urgency to all the units in the quest to ensure equal representation of women. Creating a sense of urgency not only will ensure that more women can be part of the military, but will also create an awareness of the necessity for women to join the army.

Monitoring of the Rehabilitation of the Historic World War II US Air Force Base in Greenland

After the end of World War II, many military air bases in Greenland were abandoned with all the material left in place. One of these sites was the Bluie East Two military air base. A specific feature of this area is that it contained thousands of old barrels formerly used for fuel storage. In 2019, a rehabilitation of this area began. A few months prior to the rehabilitation, our expedition visited the area and mapped it using an unmanned aerial vehicle (UAV). This made it probably the latest documentation before the start of the sanitation. The aim of such mapping was to estimate the number of barrels in a given location. The second objective was to monitor the progress of the rehabilitation over the years. For this purpose, satellite data were acquired for the years 2019 through 2022. A supervised classification was performed to automatically detect sites with barrel occurrences, which enabled subsequent change detection. We conclude that a total of 33,786 old barrels were located in the investigated area in 2019. However, we suggest this number is a lower estimate of the actual number of barrels due to the factors we mention in our paper. The results further indicate that between the years 2019 and 2022 the barrels were removed from more than half of the area.

Sounding of the Atmosphere Using Broadband Emission Radiometry (SABER): Instrument and Science Measurement Description

AbstractSABER (Sounding of the Atmosphere using Broadband Emission Radiometry) is a 10‐channel infrared radiometer that is one of four instruments on the NASA TIMED (Thermosphere‐Ionosphere‐Mesosphere Energetics and Dynamics) satellite mission to study the structure, energetics, chemistry, and dynamics of the Earth's mesosphere and lower thermosphere. Each of the ten SABER channels has a unique filter over its detector. The filter passes infrared radiation within a defined spectral region that optimizes the ability to derive temperature and constituent concentrations from the infrared radiance measurements. The TIMED spacecraft was launched into a 625 km circular polar orbit (74.1° inclination) via a Boeing Delta II rocket from Vandenberg Air Force Base on 7 December 2001. SABER continues to operate nominally and collect data routinely as it has for over 21 years. Nearly 2,200 peer‐reviewed journal articles have been published worldwide using SABER data. A list of these articles is included in Supporting Information S1 accompanying this paper. This paper presents a detailed technical description of the SABER instrument including major subsystems of the instrument and technical performance parameters. This paper comprehensively describes the instrument and its components and provides final instrument design and performance parameters. The motivation for this paper is to document this information permanently for future reference. The Space Dynamics Laboratory (SDL) of Utah State University designed, fabricated, and calibrated the SABER instrument in close collaboration with NASA Langley Research Center, Hampton University, and Global Atmospheric Technologies and Science (GATS).

Long-Term Trends in Ice Fog Occurrence in the Fairbanks, Alaska, Region Based on Airport Observations

Abstract Ice fog typically occurs at temperatures below approximately −30°C. Ice fog formation and persistence are affected by atmospheric processes at different spatial and temporal scales and can be influenced by anthropogenic activities that add vapor to the near-surface atmosphere. Based on meteorological observations from Fairbanks International Airport and Eielson Air Force Base (Alaska) from 1948/49 to 2021/22, we provide an overview of general ice fog climatology at the sites, changes over time, and synoptic-scale upper-level weather patterns common during ice fog occurrence. On average, ice fog occurrence has decreased by 60%–70% over the study period (median number of ice fog days at Fairbanks airport in the period 1950/51–1979/80: 16.5; median in the period 1990/91–2019/20: 6). The average lengths of ice fog events and of the ice fog season have also decreased. Trends are not linear, and rates of change vary over time. The greatest reduction in ice fog occurred during the 1970s and 1980s. Trends in ice fog hours roughly track decreasing trends in hours with cold temperatures. However, the percentage of cold hours in which ice fog occurs has decreased since approximately the 1980s. This result suggests that local changes in air pollution or near-surface moisture may also play an important role in trends in ice fog occurrence. We use self-organizing maps to assess recurring synoptic-scale weather patterns in the upper atmosphere during ice fog conditions in Fairbanks. Ice fog is typically associated with a northerly flow or low pressure gradients over the study area. Significance Statement We aim to show when and how often ice fog occurs in the Fairbanks region, how this has changed over time, and what kind of larger-scale weather patterns are common during ice fog. Ice fog strongly reduces visibility and represents a hazard to aviation and other traffic. The number of ice fog hours and days per winter has decreased substantially over the 70-yr period of record. Ice fog is, on average, less persistent now than in the past. The reduction is related to fewer days with cold temperatures, but changes in air pollution and other local factors may also play an important role. Further study is needed to fully attribute the causes of the observed changes.

The Influence of Work Ability, Motivation, and Work Productivity on the Performance of Technical Skadron Personnel 024 Based of Indonesian Air Force Atang Sendjaja Bogor

The purpose of this study was to analyze the effect of work ability, motivation and work productivity on the performance of the 024 Technical Squadron Atang Sendjaja Air Force Base, either simultaneously or partially. This research also wants to analyze which variables of work ability, motivation and work productivity have a dominant influence on the performance of 024 Technical Squadron personnel. This type of research is explanatory research. The study population was 93 personnel from the 024 Engineering Squadron Atang Sendjaja Air Force Base. Considering that the population was not too large, a census study was used, namely all non-commissioned officers from the 024 Engineering Squadron would become research respondents. The analytical method uses multiple linear regression and hypothesis testing. The results of the study show that work ability, motivation and work productivity on the performance of non-commissioned officers of the 024 Engineering Squadron both simultaneously and partially. Furthermore, this study identified that motivation has a dominant effect on the performance of the personnel of the 024 Technical Squadron Atang Sendjaja Bogor Air Force Base.

What signs and symptoms best distinguish stasis dermatitis from cellulitis of the lower extremities?

Offutt Air Force Base Family Medicine Residency, Omaha, NE The corresponding author is Anne Marie Kennedy; [email protected] The authors declare no conflicts of interest. The opinions and assertions contained herein are those of the authors and are not to be construed as official or as reflecting the views of the U.S. Air Force Medical Department, the Air Force at large, or the Department of Defense.