Multiple Bodies Research Articles

Towards Robust and Accurate Cooperative State Estimation for Multiple Rigid Bodies

Towards Robust and Accurate Cooperative State Estimation for Multiple Rigid Bodies

Investigation of Current Practices and Challenges of Stakeholder Management Process in Construction Projects

In the construction industry, stakeholder management is essential for project success because it entailslocating, evaluating, and proactively interactingwith people or organizations that have the potential to have a substantial impact on project. Due to the involvement of multiple parties, including clients, contractors, subcontractors, regulatory bodies, local communities, and environmental organizations, the construction business is intrinsically complicated. Achieving project objectives, minimizing conflicts, and addressing a variety of interests all depend on effective stakeholder management. In this research, the various challenges faced by the stakeholders are identified. Alongside, the current practices followed by the stakeholders in the construction projects are explored. Based on that, the factors affecting stakeholders’ management on project performance are investigated. This research aims at identifying the most critical factors affecting the stakeholder’s performance across project success through a conceptual framework. This paper explains the direct impact made in project cycle due to stakeholder performance and major problems faced by the construction industries due to improper allocation of stakeholders. A review of earlier stakeholder management research is conducted to accomplish this goal. Keywords: Construction, stakeholders, performance, framework

Magnet ingestion in growing children: a multi-center observational study on single and multiple magnet incidents

Over the past 15 years, there has been a noticeable uptick in incidents involving children ingesting multiple magnetic foreign bodies which can cause injuries and gastrointestinal complications including death. The current study aimed to identify the prevalence, clinical presentation, and management of single or multiple magnet ingestions. A retrospective multi-central cross-sectional study was conducted to include all pediatric patients < 18 years presented to the emergency department with ingestion of single or multiple magnets and admitted across hospitals in Qatar, UAE, KSA, Tunisia, and Turkey between January 2011 and December 2021. Demographics, symptoms, management, and outcomes were analyzed. There were 189 magnet ingestions, of which 88 (46.6%) were multiple magnet ingestions. Most patients (55.6%) were male, and the median age was 3.9 (IQR 2–7) years. An abdominal X-ray was obtained in all cases. 119 (62%) patients were conservatively treated, 53 (28%) required surgical intervention and 17 (8.9%) underwent gastroscopy. None of the patients with single magnet ingestions experienced morbidity or severe outcomes. Multiple magnet ingestions led to significant morbidity including hospitalizations, perforations (44.3%), severe intestinal necrosis (19.3%), peritonitis (13.6%), severe abdominal infection (10.2%), and septic shock (4.5%). The rate of surgical intervention (59.1% vs. 1.0%) and gastroscopy (15.9% vs. 3.0%) was significantly higher in the multiple ingestion group compared to the single magnet ingestion group. No deaths were identified. A high risk of serious complications, including the need for surgery to remove the magnets and substantial morbidity may result from swallowing more than one magnet. Magnet safety requirements, public education, and improved legislation are urgently required.

Multiple Retained Needles in the Neck of a Drug User: A Case Report.

Retained needles are frequently observed in intravenous drug users. However, an incidental discovery of multiple needles at the neck seldom occurs. These foreign bodies remain either asymptomatic or cause local and central complications that can be fatal. We report the case of a 43-year-old male having a medical record of human immunodeficiency virus and hepatitis C who presented to our department with a 3-day history of a febrile lateral neck swelling. He reported a history of repetitive intravenous drug use and previous abscesses that were surgically drained. We noted a left and tender 8 cm neck swelling with torticollis. Computed tomography scan showed a collected myositis of the sternocleidomastoid muscle in association to multiple metallic foreign bodies at the neck that were compatible with the aspect of broken needles. Imagery also showed a thrombosis of the ipsilateral jugular vein. No central embolism of a foreign body was noted. We performed a surgical drainage of the muscular abscess and managed to retrieve a 1 cm broken needle that was retained at the level of the collection. We did not retrieve the other needles since they were asymptomatic. The patient was placed under intravenous antibiotics for 1 week followed by oral amoxicillin-clavulanate with a total regression of the cellulitis. At the further follow-ups, the rest of the foreign bodies remained asymptomatic. Our study emphasizes on the importance of suspecting a retained foreign body in intravenous drug users to ensure an adequate management of the possible complications and to protect the medical team from incidental needle injuries.

Synovial Chondromatosis of Wrist Joint: A Rare Case Report

Synovial chondromatosis is an uncommon and non-malignant transformation of the synovial membrane which leads to development of numerous cartilaginous bodies within the joint. Synovial chondromatosis occurs rarely in the wrist, and there have been a lack of reports of this occurrence in the literature. Hereby we reported a case of synovial chondromatosis occurred in the wrist joint treated with marginal excision. A 52-year-old male complained lump on his right wrist accompanied by mild pain. On physical examination, there was lump on ulnar side of the right wrist with normal underlying skin, palpable hard and immobile. There was slight limitation on wrist flexion and extension, whereas radial – and ulnar deviation and pronation – supination range of motion were within normal limit. The plain x-ray of the right wrist showed multiple calcified intra-articular cartilaginous loose bodies in the distal radioulnar joint. Biopsy showed multilobulated cartilage tissue that contained chondrocytes without atypia, and some cartilage tissue accompanied with mild atypia. We diagnosed the patient as primary benign soft tissue tumor at right distal radio-ulnar joint due to synovial chondromatosis and we performed marginal excision. The clinical result was reported good, but complete data could not be obtained because the patient refused to do routine follow up. The rarity of synovial chondromatosis involving the wrist joint could be an obstacle in performing diagnostic procedures and treatment for the case, but with the thoughtful application of resources and surgical principles, synovial chondromatosis of the wrist joint can be safely and effectively managed. Keywords: Synovial chondromatosis, Wrist joint, Marginal excision

A Future European Scientific Dialogue Regulatory Framework: Connecting the Dots

The regulatory framework of the European Union (EU) offers multiple and valuable options for Scientific Advice (SA). However, at a time of increasing scientific complexity and global competition, navigating the SA landscape may be challenging. Such challenges are related to the technicalities of the framework itself, as well as to fundamental changes in the development of promising therapeutics. This article provides an overview of these challenges and reflects on the ways in which the already available SA options could be consolidated and optimized for building an integrated, easy-to-navigate process. The key elements of the proposal are improved orientation and navigation support, a simplified process of managing parallel interactions with multiple bodies, competitive SA timelines, consistency and harmonization across stakeholders, a strengthened horizon scanning to increase network preparedness, and a mechanism for building an institutional memory. The article builds on ongoing dialogues driven by the European Medicines Agency and the European Medicines Regulatory Network, and contributes the viewpoint of the European Federation of Pharmaceutical Industries on the ways in which the EU SA framework needs to evolve to provide effective Scientific Dialogue throughout the medicine lifecycle. The article is timely because of the current discussion on the future Scientific Dialogue framework and may inform forthcoming legislative changes in the draft General Pharma Legislation revision and how they are practically implemented.

Fracture-vuggy carbonate reservoir characterization based on multiple geological information fusion

The complexity and strong heterogeneity of carbonate reservoirs with fracture-vuggy structures present significant challenges in reservoir characterization. To address these challenges, we propose a novel multi-element information fusion modeling approach. This approach is designed to integrate multiple methods and incorporate multi-probability fusion at various facies and scales, thereby bridging the gap between geological information and reservoir modeling. Our methodology involves four key steps. First, the statistics between frequency of karst and geological information are acquired, and we quantify the statistics to regression equations. Second, these regression equations are transferred to probability bodies. The probability bodies can be applied in modeling as a soft control. But just one single body can be input in modeling process. Third, multiple probability bodies are fused into a fusion probability body by a probability fusion algorithm, which can keep the potential information of probability bodies. Finally, we apply the probability body in modeling workflow. By this way, the fusion method bridges the gap between geological information and modeling. The model established through our proposed method showed a significant level of consistency with reservoir re-evaluation, achieving an impressive 90% degree of alignment. Furthermore, the history match analysis revealed a high correlation, indicating the model's reliability. The method effectively integrates various scales and types of geological information, offering an accurate approach to complex carbonate reservoir modeling.

Coordinated suction and blowing of a cylinder array for thrust generation

Various systems of mechanical devices and natural organisms use the repeated expansion and contraction of deformable structures to draw in and blow out fluid. Instead of such deformable continuous structures, a system that consists of multiple discrete bodies can also generate a directional flow through the cooperative movement of the individual bodies. In this study, we numerically investigate the collective effects of a multi-body system composed of eight circular cylinders, each of which oscillates separately in the radial direction to generate thrust. The cylinder array performs cooperative motion regulated by three motion parameters: phase difference, oscillation amplitude and frequency at a low Reynolds number ( $Re = 10$ ). The phase difference between the cylinders is critical in determining the extent of the directional flow and the time-averaged thrust. The optimal phase difference that yields the maximum time-averaged thrust is consistent, regardless of the oscillation amplitude and frequency. However, the thrust generation performance becomes significantly weaker at a higher Reynolds number ( $Re = 100$ ). This highlights that the hydrodynamic blockage in gaps between cylinders, which is induced by strong viscous diffusion at the low Reynolds number, is essential for the cooperative force generation of multiple closely spaced bodies. A new dimensionless geometric parameter based on the motion of the array is proposed to characterize the degree of bias in the generated flow and it successfully predicts the trend in the time-averaged thrust at the low Reynolds number with strong hydrodynamic blockage.

How to Optimize Local Government Supervision of Medical Waste Management in Healthcare Facilities?

Medical waste is classified as hazardous and toxic that causes environmental pollution and impacts public health. The management of this medical waste in healthcare facilities is under the supervision of multiple government bodies. However, the approach is not effective due to the overlapping regulations. This research proposes an effective solution for the supervision of medical waste in Indonesia. This is prescriptive qualitative research, and documentation studies are carried out by tracing relevant library sources. Field studies were conducted through online interviews equipped with focus group discussions (FGDs) to obtain complete data from the speakers, which were further analyzed using a qualitative approach. Regulations have existed, but the implementation has not been optimal, so there is still a lot of pollution due to medical waste that endangers public health. Optimization of local government supervision of medical waste needs to be carried out by enforcing regulations on medical waste. Local governments carry out preventive supervision through facilitation by providing infrastructure and guidance on medical waste management technology. The provision of sanctions for those who continue to violate the regulations is a form of repressive supervision so that public health is protected.&#x0D; Keywords: Surveillance; Local government; Medical waste; Health care facilities

Magnetic foreign bodies of the gastrointestinal tract in pediatric practice

To analyze the pediatric patients with multiple magnetic foreign bodies of the gastrointestinal tract undergoing surgical intervention; to present the treatment and diagnostic algorithm in pediatric practice; to compare surgical interventions for these lesions and determine the most optimal one. A retrospective single-center study included 9 patients diagnosed with multiple magnetic foreign bodies of the gastrointestinal tract. Exclusion criteria: outpatient cases and endoscopic removal of magnetic foreign bodies. All patients underwent laparoscopy and/or laparotomy. We analyzed postoperative data and determined the preferable approach. All patients were discharged without complications. Length of hospital-stay was shorter after laparoscopy (7 vs. 12 days). Patients after laparoscopy didn't need for intensive care while laparotomy required ICU stay for 4.5±2.2 days. Enteral feeding started after 1 and 3 days, respectively. Laparoscopy is preferable for multiple magnetic foreign bodies of the gastrointestinal tract due to shorter hospital-stay, no need for ICU-stay, lower surgical trauma and earlier enteral feeding.

Synovial Chondromatosis of Shoulder Treated by Arthroscopic Synovectomy and Removal of Loose Bodies: A Case Report

Synovial Chondromatosis of the shoulder is mentioned in literature as a rare case. It is a benign neoplastic condition of the synovial membrane. Multiple osteocartilaginous loose bodies inside the joint characterize this rare monoarticular disorder. This case report describes a 32-year-old man who presented with right shoulder pain for six months. He had painful abduction and internal rotation. The condition was diagnosed as synovial chondromatosis. The patient underwent arthroscopic removal of loose bodies and synovectomy. This case illustrates the investigation and treatment of synovial chondromatosis of the shoulder. The loose bodies in synovial chondromatosis of a shoulder joint can be retrieved by arthroscopy as it provides a broader field of vision, better accessible access to the loose bodies, synovectomy, reduced hospital stay, and better rehabilitation. Keywords: Arthroscopy, Loose Bodies, Shoulder, Synovial Chondromatosis

El control de convencionalidad y la concurrencia de intérpretes autorizados de disposiciones constitucionalesThe conventionality control and the concurrence of authorized interpreters of constitutional provisions

Abstract International instruments on human rights play a decisive role in defining the content of state law. Although the constitutional block constitutes an articulation tool between national and international law, it produces the concurrence of authorized interpreters of documents with equivalent normative ranks. The purpose of this text is to analyze the legal value of interpretations made by multiple authorized bodies in contexts prone to the appearance of interpretative disagreements. The point of reference is the American Convention on Human Rights and the institution of the constitutional block developed in Colombia. In general terms, reasons are given in favor of the progressive implementation of human rights protection standards and a regime of state deference in cases of institutional soundness and genuine interpretative disagreements. The intensity of the conventionality control would have a dynamic and variable character.

FESD-J: Finite Elements with Switch Detection for numerical optimal control of rigid bodies with impacts and Coulomb friction

The Finite Elements with Switch Detection (FESD) is a high-accuracy method for the numerical simulation and solution of optimal control problems subject to discontinuous ODEs. In this article, we extend the FESD method (Nurkanović et al., 2022) to the dynamic equations of multiple rigid bodies that exhibit state jumps due to impacts and Coulomb friction. This new method is referred to as FESD with Jumps (FESD-J). Starting from the standard Runge–Kutta equations, we let the integration step sizes be degrees of freedom. Additional constraints are introduced to ensure exact switch detection and to remove spurious degrees of freedom if no switches occur. Moreover, at the boundaries of each integration interval (finite element), we impose the impact equations in their complementarity form, at both the position and velocity level. They compute the normal and tangential impulses in case of contact making. Otherwise, they are reduced to the continuity conditions for the velocities. FESD-J treats multiple contacts, where each contact can have a different coefficient of restitution and friction. All methods introduced in this paper are implemented in the open-source software package NOSNOC (Nurkanović and Diehl, 2022). We illustrate the use of FESD-J in both simulation and optimal control examples.

The Influence of the Daimōn in Ancient Philosophy upon Contemporary Psychology

This paper explores the relevance of the Hellenic daimōn as the root meaning of the Latin genius or the English ‘genius’, with its influence upon contemporary psychology in the context of a wider philosophical quest to ‘know thy Self’. Sufficient evidence has emerged from multiple bodies of work by various thinkers to suggest that past and present intellectual lineages should be adequately interconnected as mutually informing outlooks. Additionally, this article points out that scholarship alone is insufficient and that it needs the practical application of philosophy in order to render more accurate perspectives on knowledge. As our predecessors have shown, appropriate educational and legal systems need to be in place to encourage and to effectively support philosophy with its interdisciplinary vision towards a new paradigm for human excellence.

Optimal array arrangement of oscillating wave surge converters: An analysis based on three devices

Wave farms consist of arrays of wave energy converters. However, ocean waves perturbed by one device will interact with its neighbouring devices, which can lead to more or less power yielded than operating the devices in isolation. Therefore, it is of significant interest to study the optimal layout and spacing to deploy multiple devices. In this work, a validated high-fidelity computational approach is used to study the optimal arrays of three oscillating wave surge converters by systematically varying the array arrangement in different wave conditions. The simulations demonstrate the wave interaction with multiple dynamic bodies and how this affects the overall power output. Furthermore, novel empirical rules are derived to design the optimal constructive layout for three devices in a given wave condition, and this can be extended to cases of numerous devices.

When the Body Speaks: Body-Mapping the Somatic Symptoms of Stress in Hospital Social Workers

Abstract Impact of workplace stress is a significant issue for social workers in hospital practice. This study aims to understand somatic stress in hospital social workers, the physical embodiment of stress and recognition within employing organisations and education. Using a collaborative inquiry methodology, data were collected using body-mapping workshops. Following Interpretive Phenomenological Analysis, three overarching themes were generated: experiences of somatisation, deliberate disembodiment, stress management and staff well-being. Social worker findings include the inhabiting of multiple bodies at work and the impact of the work environment on well-being. Harmful coping strategies and a lack of existing support and recognition were identified. Recommendations include an integration of somatic stress into the existing well-being scholarship to aid in acknowledgement and resourcing.

1962: a year of multiple voices and bodies in Algerian spaces

Resumo: Em 2022, a Argélia comemorou seus 60 anos de independência após uma longa e violenta colonização francesa iniciada em 1830. Malika Rahal vem preencher uma lacuna na historiografia sobre a guerra colonial na Argélia. Ela se debruça sobre narrativas mais íntimas das trajetórias individuais e do povo como corpo coletivo, sobre as experiências pouco conhecidas dos campos de concentração, dos refugiados, a busca pelos desaparecidos e as comemorações pela independência. A pesquisadora propõe abordagens com temas sensíveis para entender como 1962 é um ano revelador das problemáticas vividas pela população em um país no devir. A pesquisa se baseia no cotidiano em tempos tumultuosos e com base em rico corpus visual e sonoro que nos leva a olhar para os múltiplos acontecimentos do longo 62 argelino repleto de camadas e significados. O livro é dividido em 22 capítulos e quatro temáticas: Violências, Corpos, Espaços e Tempos.

Effect of a rotational damper on a moored and articulated multibody offshore system in waves

Motions and loads of an articulated and moored floating platform consisting of multiple bodies in waves are investigated through numerical analysis. The wave–structure interaction (WSI) problem is solved using a high-fidelity viscous–flow solver that couples nonlinear rigid body motions, multibody interactions with an internal connection, and mooring dynamics. The study focuses on two modular floating structures (MFSs) connected by a flexible joint, with and without a rotational damper, and positioned using four symmetrical mooring lines. Multibody responses and the corresponding loads acting on the mooring lines and hinged joints are analyzed. Our results reveal that the influence of the damper on heave motions is less significant. Notably, the presence of the rotational damper has a noticeable impact on pitch motions between the two hinged MFSs. Introducing a rotational damper on the flexible joint effectively dampens the highly dynamic pitch motions while not imposing additional loads on the flexible joints.

人骨 出土 事例로 본 中古期 新羅古墳 追加葬의 再認識

Multiple bodies were buried in stone chamber tombs with old-style horizontal entrances that were designed to accommodate additional burials. The number of additional burials and time span between themcan be determined through physical research. However, the scarcity of cases where human bones were excavated has hindered the restoration of detailed aspects of these burials. Nevertheless, we focused on the possibility of restoration by studying the exposure of human bones in existing data. Prior to this, we organized the terminology related to additional burials and proceeded to analyze ancient tombs discovered in areas that date back tothe middle ancient period of Silla, where human bones from more than one individual were found. As a result, we categorized the bones into four types based on their exposure.&#x0D; The above data highlights several issues regarding additional burials. Firstly, it is observed that the number of buried bodies does not directly correspond to the number of thalami. Additionally, we propose the possibility of a facility specifically designed for burying bones collected from an individual’s remains. It is equally plausible that altars for burying remains or funeral altars were constructed for the purpose of interring the gathered bones. Furthermore, we have also confirmed that the types of tombs prepared prior to death were likewise utilized for additional burials. Our conclusions suggest that these phenomena emergedfrom the re-dissemination of Silla’s central regulations and perspectives on horizontal entrance tombs and funeral ceremonies in rural areas sincethe sixth century, along with the corresponding pressure to adopt these burial practices.

The Golden meteorite fall: Fireball trajectory, orbit, and meteorite characterization

AbstractThe Golden (British Columbia, Canada) meteorite fall occurred on October 4, 2021 at 0534 UT with the first recovered fragment (1.3 kg) landing on an occupied bed. The associated fireball was recorded by numerous cameras permitting reconstruction of its trajectory and orbit. The fireball entered the atmosphere at a 54° angle from the horizontal at a speed of 18 km s−1. The fireball reached a peak brightness of −14, having first become luminous at a height of &gt;84 km and ending at 18 km altitude. Analysis of the infrasonic record of the bolide produced an estimated mass of kg while modeling of the fireball light curve suggests an initial mass near 70 kg. The fireball experienced a major flare near 31 km altitude where more than half its mass was lost in the form of dust and gram‐sized fragments under a dynamic pressure of 3.3 MPa. The strength and fragmentation behavior of the fireball were similar to those reported for other meteorite‐producing fireballs (Borovička et al., 2020). Seven days after the fireball occurred, an additional 0.9 kg fragment was recovered during the second day of dedicated searching guided by initial trajectory and dark flight calculations. Additional searching in the fall and spring of 2021–2022 located no additional fragments. The meteorite is an unbrecciated, low‐shock (S2) ordinary chondrite of intermediate composition, typed as an L/LL5 with a grain density of ~3530 k gm−3, an average bulk density of 3150 kg m−3 and calculated porosity of ~10%. From noble gas measurements, the cosmic ray exposure age is 25 ± 4 Ma while gas retention ages are all &gt;2 Ga. Short‐lived radionuclides and noble gas measurements of the pre‐atmospheric size overlap with estimates from infrasound and light curve modeling producing a preferred pre‐atmospheric mass of 70–200 kg. The orbit of Golden has a high inclination (23.5°) and is consistent with delivery from the inner main belt. The highest probability (60%) of an origin is from the Hungaria group. We propose that Golden may originate among the background S‐type asteroids found interspersed in the Hungaria region. The current collection of 18 L/LL—chondrite orbits shows a strong preference for origins in the inner main belt, suggesting multiple parent bodies may be required to explain the diversity in CRE ages and shock states.