United States Army Research Articles

Under the Double Eagle: Citizen Employees of the United States Army on the Texas Frontier, 1846–1899 by Thomas T. Smith (review)

Under the Double Eagle: Citizen Employees of the United States Army on the Texas Frontier, 1846–1899 by Thomas T. Smith (review)

An Intersectional Analysis of Women's Experiences of Inclusion in the United States Army

An Intersectional Analysis of Women's Experiences of Inclusion in the United States Army

Osteoarthritis Across Joint Sites in the Million Veteran Program Cohort: Insights From Electronic Health Records and Military Service History.

To characterize the relationship between the frequency of idiopathic osteoarthritis (OA) and characteristics including demographics, comorbidities, military service history, and physical health in a veteran population. We performed a cohort study in the Million Veteran Program (MVP) using International Classification of Diseases, 9th and 10th revision codes to define the frequency of site-specific OA across 3 joints or unspecified OA in veterans with respect to demographics (eg, age, sex, race and ethnicity), military service data, detailed electronic health records, military branch, and war era. We validated previous reports of sex- and age-dependent differences in OA frequency, and we identified that unspecified OA was associated with a higher frequency of 16 Deyo-Charlson comorbidities. These associations generally persisted within each isolated joint site-specific OA. Depending on military branch, prior military engagement was differentially associated with the frequency of OA. Prior United States Army and Navy service were associated with higher and lower risk, respectively, of OA across all joint sites; however, multivariable-adjusted models adjusting for a range of covariates, including age, sex, and ancestry, reversed the apparent protective effect of prior Navy service. These findings highlight the breadth of factors associated with OA in the MVP veteran population and suggest that physical status may be a modifiable risk factor for OA. This work may help in the design of strategies to optimize appropriate detection, intervention, treatment, and even rehabilitation for OA in veterans and the general population.

Dietary Restraint Mediates the Association Between Body Image and Diet Quality in United States Army Soldiers

Dietary Restraint Mediates the Association Between Body Image and Diet Quality in United States Army Soldiers

From single to multi‐purpose reservoir: A framework for optimizing reservoir efficiency

AbstractThe prevailing challenge centers on the limited application of single‐purpose flood control reservoirs transitioning to multi‐purpose reservoirs, which, despite their potential, often fall short in addressing the escalating demands for diverse water resource management. These challenges are compounded by outdated operational rules and changing environmental conditions. This research develops a framework to enhance the dual functionality of reservoirs, initially designed for flood control, to also support water supply through the determination of maximum safe water levels (MSWLs). Utilizing historical inflow data and reservoir simulation models, the study identifies opportunities for optimizing United States Army Corps of Engineers Louisville District reservoirs. It highlights certain reservoirs as ideal for augmenting water supply capabilities without compromising flood control performance. Others remain critical for flood management due to limited water supply potential, underscoring the importance of maintaining a focus on flood control. The findings illuminate the intricate balance required between managing flood risks and enhancing water supply, indicating that precise operational adjustments can significantly improve reservoir sustainability and efficiency. This method offers a viable pathway to convert single purpose reservoirs into multi‐purpose reservoirs, meeting growing water demands while ensuring robust flood mitigation, and making a step toward better water utilization.

Modelacion del impacto del deshielo en lo caudales en la cuenca del Lago Mansfiled Hollow en Connecticut, USA

Storm runoff predictions are essential for minimizing flood hazards and increasing resilience to extreme weather events. In this study, an analysis was conducted to simulate snowmelt runoff in the Mansfield Hollow Lake Watershed, which is a tributary of the Thames River watershed in Connecticut, New England. The United States Army Corp of Engineers (USACE) model HEC-HMS was applied to simulate snowmelt runoff during the winter-spring of 2010 and 2019. The Mansfield Hollow Lake Watershed is composed of three main tributaries, namely the Fenton, Mount Hope, and Natchaug Rivers. These runoff simulations and the watershed response to snowmelt are crucial for evaluating the potential impacts of watershed management decisions, particularly during high-flow periods. The HEC-HMS model was calibrated during the 2010 event and validated for the 2019 events. The study found that for the snow storms during 2010 and 2019 events, HEC-HMS model provided highly accurate predictions of snowmelt runoff with R-squared and, Nash - Sutcliffe correlation values exceeding 0.76. These findings highlight the efficacy of HEC-HMS model for simulating snowmelt runoff and demonstrate the utility of such model in predicting and managing flood risks. The results of this study provide valuable insights into the potential impacts of snowmelt runoff and will inform future watershed management decisions in the Mansfield Hollow Lake Watershed and similar regions.

A systematic review and Bayesian meta-analysis provide evidence for an effect of acute physical activity on cognition in young adults

Physical exercise is a potential intervention for enhancing cognitive function across the lifespan. However, while studies employing long-term exercise interventions consistently show positive effects on cognition, studies using single acute bouts have produced mixed results. Here, a systematic review and meta-analysis was conducted to determine the impact of acute exercise on cognitive task performance in healthy young adults. A Bayesian hierarchical model quantified probabilistic evidence for a modulatory relationship by synthesizing 651 effect sizes from 113 studies from PsychInfo and Google Scholar representing 4,390 participants. Publication bias was mitigated using the trim-and-fill method. Acute exercise was found to have a small beneficial effect on cognition (g = 0.13 ± 0.04; BF = 3.67) and decrease reaction time. A meta-analysis restricted to executive function tasks revealed improvements in working memory and inhibition. Meta-analytic estimates were consistent across multiple priors and likelihood functions. Physical activities were categorized based on exercise type (e.g., cycling) because many activities have aerobic and anaerobic components, but this approach may limit comparison to studies that categorize activities based on metabolic demands. The current study provides an updated synthesis of the existing literature and insights into the robustness of acute exercise-induced effects on cognition. Funding provided by the United States Army Research Office.

The U.S. Army Aeromedical Research Laboratory Virtual Reality Vection System.

Vection is a stationary individual's illusory experience of self-motion. This illusory self-motion is operationally important for aviation, particularly military aviation, since vection is a dramatic example of spatial disorientation (SD), which is an individual's failure to correctly sense the aircraft's position, motion, and/or attitude with respect to the fixed coordinate system of the Earth's surface and its gravitational vertical. Notably, SD is a major cause of fatal aviation mishaps, and the visual system is particularly prone to provoking vection. This article describes the Virtual Reality Vection System (VRVS), which uses computer-controlled virtual reality technology to induce vection under controlled conditions for training, demonstration, testing, and research. The VRVS enables the precise specification of the number and appearance of visual stimulus elements intended to generate vection, including photorealistic images. The VRVS can present visual stimuli on any OpenXR-capable virtual reality headset. The VRVS currently records 2 types of behavioral responses, button presses to indicate the presence and duration of vection and the voltage of a handheld linear potentiometer to indicate the presence, duration, and magnitude of vection. An approved test plan helped guide, organize, document, and validate the VRVS during its development. Under this plan, a pair of tests guided hardware and software development of the VRVS system. Although the first test verified the ability of the VRVS to generate and measure vection, it also demonstrated that the VRVS can quickly manipulate the visual stimuli from one trial to the next so that the VRVS can support complex experimental designs. The second test used these capabilities to verify that the VRVS can characterize vection in a more analytic fashion using a masking paradigm. Specifically, the test assessed whether random stimulus elements injected into the vection-inducing stimulus disrupted vection in a quantifiable fashion. This work opens the door to studies that characterize the necessary and sufficient visual elements for vection-based SD. The VRVS is currently used to research, develop, test, and evaluate mitigation strategies targeting vection-related SD in degraded visual environments. Similarly, the VRVS is supporting research to develop methods to predict individual differences in visually induced motion sickness susceptibilities. The VRVS is currently being integrated with a precision motor-controlled rotating Barany chair for multisensory studies. It should be noted that since the VRVS was developed to support United States Army Aeromedical Research Laboratory projects, it is an Army product representing government intellectual property and may be freely available to other government institutions.

Combatant Command Medical Entry Standards.

The medical entry standards for the United States Central Command (USCENTCOM) restrict individuals with various medical conditions from entering the deployed environment. The impact of this program is unknown. The total number of army personnel deployed to USCENTCOM, the number of individuals with a medical entry waiver adjudicated by United States Army Central (USARCENT), and the evacuation number for each population were compared for calendar year 2023 (CY2023). A total estimated population of 20,519 U.S. Army personnel were deployed to USCENTCOM. A population of 1,918 received a medical entry waiver due to a disqualifying medical condition. The evacuation rate for the general population was 2.4% compared to the 1.4% evacuation rate of the population with a medical entry waiver (P = .0027). The medical entry standards, as written and adjudicated in 2023, resulted in a relatively reduced evacuation rate for individuals with otherwise prohibited medical conditions compared to the general deployed population.

Synthetic cannabinoid identification in cases associated with blue lotus and valerian root vaping products.

Synthetic cannabinoids emerged in the early 21st century and have continued to evolve and flourish to present day. Like other novel psychoactive substances (NPS), synthetic cannabinoids have been sold under the guise of legitimate products. Some examples include "potpourri," "incense," and herbal material. Between May 2020 and December 2023, the United States Army Criminal Investigation Laboratory, Drug Chemistry Division (USACIL) received 29 seized drug cases mentioning "blue lotus" or "valerian root." In 90% of these cases, at least one exhibit contained one or more synthetic cannabinoids. During the same timeframe, the Armed Forces Medical Examiner System, Division of Forensic Toxicology received 65 toxicology cases that contained synthetic cannabinoids and/or their corresponding metabolites where case history mentioned "blue lotus." The most frequently observed synthetic cannabinoids between laboratories were 5F-MDMB-PICA, ADB-BUTINACA, and MDMB-4en-PINACA. Innocuous branding and marketing may deceive law enforcement, investigators, and healthcare providers into believing that the adverse effects of erratic behavior, sedation, slurred speech, and hallucinations are a result of toxicity from botanical extracts (e.g. apomorphine and nuciferine in blue lotus). Due to the dangerous nature of these NPS, synthetic cannabinoid screening is recommended for all cases where there is suspected use of vaping products suggested to contain "blue lotus" or "valerian root" as vendors continue to conceal the presence of these compounds.

Thirty Six Years of Service in the United States Army

Thirty Six Years of Service in the United States Army

Stress and resilience among military medical students completing a high-fidelity military medical simulation

Background High-fidelity medical simulations can help students successfully navigate the stressors of medical training and practice. Because sufficiently high stress levels can interfere with learning, the balance of stress and resilience factors during simulation training should be carefully curated. However, student experiences of stress and resilience during high-fidelity simulations are seldom well characterized, especially in military medical training. With this in mind, the authors investigated students’ lived experiences of stress and resilience during a well-established high-fidelity simulation at a military medical school. Methods Fourth-year active-duty military medical students (n = 23) from the United States Air Force, Army, and Navy who were attending Operation Bushmaster – a 5-day, high-fidelity military medical simulation – were interviewed during and after the simulation. Data were analyzed via a hermeneutic phenomenological qualitative approach. Another 21 students reported their stress levels and trait mindfulness. Experts rated their performance at Operation Bushmaster. Results Participant narratives pointed towards major internal stressors, including chronic uncertainty and fluctuating motivation, and external stressors, such as weather and equipment-related challenges. Narratives also identified multiple factors that mitigated stress, including the use of mindfulness skills (especially mindful/tactical breathing), giving/receiving social support, shifting perspectives to centre connections between Operation Bushmaster and students’ professional purpose, and positive self-talk that gave participants permission to make mistakes and learn from them. There was a moderate positive correlation between mindfulness and performance at Operation Bushmaster. Conclusions These stress and resilience factors are critical leverage points for educators seeking to optimize learning during Operation Bushmaster and other high-fidelity simulation trainings. Future research should continue to examine how the balance of these factors impacts medical students’ immediate learning (e.g. regarding medical decision-making, skill and leadership) and longer-term ability to successfully navigate the stressors of the medical profession.

Review paper on applications of the HEC-RAS model for flooding, agriculture, and water quality simulation

ABSTRACT The Hydrologic Engineering Center (HEC) of the United States Army Corps of Engineers (USACE) has developed the HEC-River Analysis System (RAS) hydraulic channel flow model as part of its portfolio of hydrologic and hydraulic modeling tools. HEC-RAS is a new version with capabilities to model flooding, modeling for agriculture production computations for water quality, and many more related to hydraulic modeling. The analysis components of the HEC-RAS system include one-dimensional steady flow water surface profile computations, one-dimensional and or two-dimensional unsteady flow simulation, one-dimensional and two-dimensional computations of quasi-unsteady or fully unsteady flow movable boundary sediment transport, and one-dimensional water quality analysis. The main objective of this paper is to review the use of HEC-RAS on flooding, agriculture, and water quality. The three primary components of the data input are plan data, geometry data, and flow data. Three of these scenarios applied to HEC-RAS and were proven by previous reviewers.

“The Jim Crow Army Must Have a Scapegoat”: Justice, Cowardice, and the Court Martial of Lieutenant Leon Gilbert (Korea, 1950)

The story of Lieutenant Leon Gilbert—a Black United States Army officer court-martialed during the Korean War—challenged the United States’ self-declared postwar mission to free oppressed peoples across the world, while continuing to subjugate African Americans at home. Although many critics judged Gilbert’s refusal to return to battle as an act of cowardice, others viewed him as a victim, and even a hero. The Gilbert case revealed that although African Americans were ostensibly making progress in the newly desegregated United States military, the fight for racial justice continued to be impeded by white Americans’ perceptions of Black inadequacy. Amidst a war purportedly being fought for principles of democracy and freedom, Gilbert’s court martial highlighted the connection between American racism and United States foreign policy, as Black military personnel became scapegoats for their nation’s military failures. The prosecution and persecution of Gilbert thus exposed the tension between American rhetoric and American racism.

Reach scale channel planform dynamics of transboundary River Jaldhaka within Himalayan Foreland Basin

ABSTRACT The slopes of Himalayan piedmont and foothill plain are being modified by the Himalayan origin river systems. In this study, spatiotemporal dynamics of channel planform of braided River Jaldhaka have been estimated using United States Army Map (1956) and landsat satellite images (1980-MSS, 1990-TM, 2000-TM, 2010-ETM+ and 2022-OLI) for the delineation of banklines, channel length, sinuosity index, braiding index, channel widths, identification of partial channel avulsion sites and bankline migration using Digital Shoreline Assessment System (DSAS) toolbar. Linear Regression Rate, Net Bankline Movement and End Point Rate were also calculated. Results revealed that the lower reach is more sinuous (maximum average channel sinuosity 1.65) compared with reach-I (1.29) and II (1.11)). The maximum channel width was in the year 2022 (968.6 m) and minimum average channel width was in 1956 (239.87 m). The maximum BI value (3.55) has been calculated in the sub reach-2 (SR-2, reach-I). Similarly, DSAS output shows maximum average EPR values (6.43 m/year) in lower reach which was most erosion prone bank. Bank facies study showed that non-cohesive bank materials accelerate rapid rate of channel avulsion and bank erosion. The variation of discharge, velocity, presence of vegetation and anthropogenic interventions controls the nature of planform changes of Jaldhaka River.

Hemostatic Evaluation of Refrigerated Whole Blood Stored 7 Days Post-Expiration.

The United States Army has shifted doctrine to focus on large-scale combat operations against peer to near-peer adversaries. Future conflicts could result in a limited supply chain, leaving medical providers with only expired blood products for treatment of hemorrhagic shock. This study evaluated quality, function, and safety metrics of whole blood stored for 1 week past regulated expiration (i.e., 35 days, in CPDA-1). Whole blood units (n = 6) were collected in citrate phosphate dextrose adenine-1 (CPDA-1) anticoagulant and stored refrigerated for up to 42 days. Units were sampled on days 35, 37, 39, and 42 of storage and evaluated for the following: complete blood count, blood metabolism and chemistries, clotting dynamics, and presence of bacteria. The majority of evaluated parameters fell outside of normal clinical ranges beginning at day 35 of storage. At 42 days, blood pH was 6.58 ± 0.038, hemolysis was significantly increased (P = .037 vs day 35), and bacterial contamination was not evident. Glucose levels continuously dropped during extended storage. K+ was significantly increased at day 42 compared to day 35 (P = .010). A significant reduction in clot strength, factor V activity, and factor VIII activity was evident beginning at day 39 of storage. Storage of whole blood out to 42 days results in a continuous decline in function, but further in vivo safety studies should be performed to determine if the benefits of expired blood outweigh the risks. Other methods to safely extend storage of whole blood that maintain hemostatic function and preserve safety should be investigated, with emphasis placed on methods that reduce potassium leak and/or hemolysis.

UPHOLDING THE LEADERSHIP LESSONS OF THE LITTLE ROCK NINE

AbstractThe author, Leader to Leader’s editor‐in‐chief, reflects on how her father was a member of the 327th Infantry Regiment of the 101st Airborne Division of the United States Army, and as such had an important role in US history. She notes that in 1957, “President Dwight D. Eisenhower issued Executive Order 10730 sending my father’s regiment to Central High School in Little Rock, Arkansas to maintain order as the school was desegregated.” This Executive Order “placed the Arkansas National Guard under federal authority and sent 1,000 US Army troops to Little Rock to enforce the US Supreme Court’s 1954 ruling in Brown v. the Board of Education that US State laws establishing segregation in public schools are unconstitutional, even if the segregated schools are otherwise equal in quality.” She relates that her father “ … remembers feeling the volatility of the situation that did not ignite, he believes, because of the discipline and presence of the 101st.” These thoughts resonated with her as she later interviewed the retired Army General Dennis J. Reimer, who in the 1990s was Chief of Staff of the United States Army, for her forthcoming documentary about our journal’s founder, Frances Hesselbein.

“Put money in thy purse. Follow thou the wars”: Othello, the Mexican–American War, and Manifest Destiny

In the winter of 1845–6 the United States Army languished on the border waiting for an opportunity to provoke what would be the Mexican–American War, or, as the Mexicans would come to call it, La Intervención Americana. To break the dull monotony, the army turned to theatre. In January, Second Lieutenant Ulysses S. Grant was cast as Desdemona in a production staged for the troops and the local community. Grant would later be the victorious general in the Civil War and the eighteenth president of the United States from 1869 to 1877. He was not yet that person. In 1846 he was a twenty-four-year-old, newly commissioned officer, only three years out of the US Military Academy. His peers, a cohort of junior officers who would become the senior military leadership on both sides of the Civil War, were also actors in the production, as well as its producers. The anecdote is humorous in large part because the Grant of national record and memory is the least Desdemona-like figure anyone can conceive. It has been repeated multiple times across the nineteenth century and still holds in the imagination almost two hundred years later.

Misdiagnosis or Missed Diagnosis - Hallux Sesamoid Fractures among Active-Duty Females in the United States Air Force: A Case Series

Background: Female service members tend to have a higher level of foot injuries than males. The United States Army spent $103 million in 2017 on fractures in toes and feet. Fractures of the tibial and fibular sesamoids are problem that often can be nonspecific, mainly related to pain at the plantar aspect of the first metatarsal head without an obvious traumatic event. Anatomic variation in these sesamoids exist after ossification which results in the possibility of multipartite sesamoids. Of the multipartite sesamoids, bipartite sesamoids are the relatively common and tripartite sesamoids are quite rare. The overall prevalence of bipartite sesamoids is presumed to be between 7 and 30%, with a majority occurring bilaterally. Methods: We completed a case series on three female active-duty Airmen. All three patients were active with their pain beginning following activity. All three were subsequently misdiagnosed, resulting in at least 6 months of pain prior to diagnosis and treatment. Results: Plain film radiography and subsequent imaging confirmed the diagnosis of a tibial or fibular sesamoid fracture. Following conservative treatment all three patients made a full recovery as confirmed by imaging and self-reported pain levels and they were able to return to full activity. Conclusion: Providers should keep a sesamoid fracture in the differential diagnosis when evaluating active female patients with pain in the area around the base of the great toe, especially in women in the military and others that may do higher levels of physical activity compared to the average patient. While the diagnosis of sesamoid fractures can be challenging, it is standard practice to obtain multiple views if using plain film radiography. Magnetic resonance imaging, weightbearing computed tomography and bone scans can be useful confirmatory studies.

Re-examining Geospatial Online Participatory Tools for Environmental Planning.

Geospatial online participatory tools, or geo-OPTs, are increasingly used worldwide for engaging the public in planning. Yet, despite growth in the adoption and use of geo-OPTs, and the growing scholarship to accompany it, our understanding of their ability to support public participation in environmental planning is still underdeveloped. In this paper, we investigate the application of a geo-OPT by the United States Army Corps of Engineers (USACE), a leading water management agency in the United States, in three contextually and geographically diverse cases. Through a combination of document analysis, interviews, and participant observation, we examine the processes and dynamics associated with the development and use of the geo-OPT Crowdsource Reporter. Our findings highlight the importance of managing geo-OPTs not in isolation or as a panacea but rather as part of a broader planning process that recognizes the complexity and significance of communication in geo-OPT processes. Although it may be tempting and seemingly simple to create and launch these online tools, our research reveals how a lack of intention early on may lead to underuse or misapplication of the tool. More significantly, real damage can be done, like increased public frustration and alienation, resulting in breakdown in communications or even worsening public relations for federal agencies.