Installation Time Research Articles

Rapid Uptake of Nest Boxes by the Endangered Greater Glider (Petauroides volans)

ABSTRACTThe loss of hollow‐bearing trees poses a critical threat to hollow‐dependent species. Nest boxes as supplementary habitat have emerged as a conservation tool for certain species, but their use in providing habitat for Southern Greater Gliders (Petauroides volans), a heat‐sensitive and hollow‐dependent species, remains limited. This study investigates the uptake and use of nest boxes designed specifically for Greater Gliders in a postfire environment. Thirty nest boxes were installed at a site that experienced moderate to severe fire during the 2019/2020 bushfires. Four different nest box designs were investigated for their thermal properties, colonisation rates and usage patterns. The time for a nest box to be used by a Greater Glider was rapid, at an average of 34 days after time of installation. Continuous camera monitoring over the course of a year revealed 100% colonisation, with gliders consistently using nest boxes across seasons regardless of nest box design. We found that nest box design influenced internal temperatures, and the best performing nest box design (constructed of wood and without foil insulation) was on average 1.99°C cooler inside than ambient temperatures (on warm days equal to or above 20°C). In comparison, natural tree hollows in use by Greater Gliders at the study site, had a much greater thermal buffer (on average 7.32°C cooler than ambient temperatures on warm days). Observations of Greater Gliders sitting outside at the entrance hole of nest boxes during the day was linked to warmer temperatures, indicating Greater Gliders likely exited nest boxes to thermoregulate. This study identified a rapid acceptance of nest boxes by the Greater Glider and offered insights into the role of nest boxes as supplementary habitat to assist population recovery following the loss of hollow‐bearing trees.

Comparatif monitoring arthropod: Auxiliary-pest complex in vineyard ta-ble grapes cultivars in Boumerdes vineyards, Northern Algeria

As an alternative to chemical treatments, traps are one of the most environmentally friendly ways to control pests in agricul-tural systems. The efficacy of traps can be maximized by taking adventage of the fact that arthropods, and especially pests, have preferences for certain colors and stimuli. From January to De-cember 2022, in the locality of Corso, situated in Boumerdes Province, Northern Algeria. The experimental site consisted of a three-year-old table grape plantation. A descriptive observa-tional method was employed to assess the performance of four different trap types: pitfall traps, food-based traps, and two col-or-based traps (yellow and blue). The experiment followed a completely randomized design with five replications to ensure reliable and accurate results. Yellow traps proved to be the most successful throughout the research., capturing a total of 1,925 arthropod individuals. In contrast, food-based traps were the least effective, with only 14 individuals captured. The traps re-vealed a richness of 106 species spanning 54 families, 11 orders, and 3 classes, highlighting the diverse arthropod community present in the vineyard ecosystem. The most frequently captured species was Jacobiasca lybica, which accounted for 81.6% of the total pests trapped. The timing of trap installation was also a crit-ical factor, with the morning period yielding the highest capture rates. These findings underscore the importance of using color-specific traps and strategic timing to enhance pest management in vineyards.

Measurement of the dynamic axial load-share ratio in vivo could indicate sufficient callus healing in external fixators

BackgroundFracture healing is commonly evaluated through physical examination and radiographic results. However, these methods rely on the surgeons’ subjective experience, without including the objective biomechanical properties of the bony callus. This paper presents an innovative method for measuring the callus stiffness in vivo to evaluate fracture healing, further instructing surgeons to remove external fixator safely.MethodsA novel dynamic axial load-share ratio (D-LS) index and its associated measuring system was introduced, including the system’s composition (hexapod and insole modules), theoretical model, and method for D-LS measurement. From Jan 2022 to May 2024, 36 patients with tibial shaft fracture treated by Taylor Spatial Frame were evaluated in this prospective study. Once the patient had reached clinical bone healing conditions, the in vivo D-LS measurement was conducted. The patients’ demographic data, clinical outcomes, particularly D-LS value and refracture rate were recorded.ResultsAt a mean follow-up of 16.50 ± 5.79 months, a total of 36 patients completed the final follow-up. Fixators were removed with an average of 24.81 ± 4.51 weeks. The result of hexapod module’s precision examination were maximum errors of 3.72 N, 3.31 N and 2.68 N in x-, y- and z-axis, respectively. The measuring process took an average system installation time of 15.42 ± 4.88 min. Two patients (5.56%) reported fracture site pain. Each patient’s D-LS was determined after three rounds of measurement. The average D-LS value was 15.58 ± 2.77% (range, 9.60–20.52%). None of the 36 patients reported refracture at the last follow-up.ConclusionsThe novel D-LS measurement system can measure the dynamic forces of lower limb for patients with external fixator in vivo. An objective biomechanical indicator of the regenerate callus was provided by the D-LS. The D-LS measurement is a complement to standard radiological assessment only after radiologically confirmed bone union. Measuring the D-LS in vivo could indicate whether the callus healing is sufficient in external fixation, and 15.6% (average) was recommended as a reference D-LS value for safe fixator removal.

CO2 field-flooding devices offer potential value for cardiopulmonary bypass procedures for CHD performed via a right-side small incision approach

ObjectiveThis study sought to evaluate the value of a CO2 field-flooding device in cardiopulmonary bypass (CPB) surgical procedures for congenital heart disease (CHD) performed via a right-side small incision approach.MethodsBetween April 2022 and December 2023, 234 children with simple CHD who underwent CPB via a right-side small incision approach were separated into a control group (n = 93) without the use of a CO2 field-flooding device and a treatment group (n = 141) in which this device was added to the traditional surgical manual exhaust. Demographic, perioperative, arterial blood gas (ABG), and laboratory test data were then compared between these groups of patients.ResultsThere was a significant difference in abnormal electrocardiogram (ECG) after aorta de-clamping during CPB, and interventions for abnormal ECG after aorta de-clamping during CPB between the control and treatment groups (17(18.3%) vs.14(9.9%), P = 0.048;12(85.7%) vs.7(50%),P = 0.013). The treatment group exhibited a lower pH (7.34 ± 0.07 vs. 7.36 ± 0.06, P = 0.039) and a higher PaCO2 (43.08 ± 7.36 vs. 38.86 ± 5.65 mmHg, P = 0.042) at the time of 30 min after initiation of CPB. A significant reduction in postoperative CK-MB was observed in treatment group (41.20 ± 17.88 vs. 56.57 ± 22.99 U/L, P = 0.002). Lower 3-day postoperative CRP levels were also observed in the treatment group relative to control (5.77 ± 0.48 vs. 9.45 ± 0.98 mg/L, P < 0.001). The S100ß concentration in the relevant patient cohort increased significantly from the time just after induction, intubation, and installation of the right central venous line to the time of admission to CCU (71.61 ± 11.83 vs. 124.04 ± 38.80, P = 0.01) and at the time of 24 h after operation (71.61 ± 11.83 vs. 101.97 ± 30.31, P = 0.01). No differences on S100β serum concentration level were found at the time of installation of the right central venous line between two groups. But there were statistically significant differences in S100β serum concentration level at the time of admission to CCU between control group and treatment group. (161.19 ± 6.62 vs. 86.89 ± 9.69 pg/ml, P = 0.01). Similar results were observed at the time of 24 h after operation. (127.62 ± 19.44 vs. 76.33 ± 10.40, P = 0.01).ConclusionThese data suggest that the CO2 field-flooding device can safely be used when performing CPB surgical procedures via a right-side small incision approach to treat CHD without hypercapnia. The use of such a CO2 field-flooding device at a flow rate of 5 L/min may help protect against cardiac and nervous system damage in children undergoing CHD surgery.

Rate of penetration prediction for large-diameter offshore drilling for wind farm structures

It is essential to shift towards sustainable energy in a world with increased awareness of global warming and climate change. There is an anticipated increase in offshore wind farms in the upcoming years. There is a need to explore new locations in tougher soil conditions for the wind farm developments as the sweet spots or technically easy spots have been taken. The rock strength must be overcome in the new locations of concern. Due to pile buckling the conventional pile driving technique becomes an undesirable solution. An alternative method that can complete wind farm infrastructure efficiently in challenging soil and rocks is drilling. In addition, there are some regions where pile driving becomes unviable due to the rules associated with maximum noise levels. The cost of the project increases significantly in the case of the use of noise mitigation measurements. Again, drilling can be considered as an alternative solution, because as a result, the noise generated during installation decreases significantly. The important role in the total drilling process is the drilling phase itself, and it can easily be equal to more than half of the total pile installation time. It is necessary to have a very decent prediction of the drilling rate for the installation of a large number of foundation piles, especially since it is important to have this information during the tender phase of a project. The currently available drilling rate models are based on empirical evidence and tend to be specific to certain drilling methods in each type of rock. This study aims to better predict the drilling rate which will be applicable for different amounts of large-diameter drilling for various rock and soil types. Significant importance will be given to the analysis of conventional top-hole drilling performance. Investigation of top hole and deep hole drilling bit design will be conducted and its applicability to soil drilling for windfarm installation will be tested.

Remembering/imagining: Shona Illingworth’s time present and Trinh-T Minh-Ha’s forgetting Vietnam

Abstract This article considers the intersecting of remembering and imagining vis à vis individual and cultural amnesia. It focuses on two artists’ films, Shona Illingworth’s video installation Time Present (2016) and Trinh-T Minh-Ha’s film, Forgetting Vietnam (2015). Time Present portrays the experience of an individual living with amnesia and further relates it to the immobility that denotes the cultural representation of the island of St Kilda (Outer Hebrides). Forgetting Vietnam questions the problematic legacy of the Vietnam War and its recollection by bridging personal and shared experiences through a portrait of Vietnam itself. Both Illingworth and Trinh use the film’s features of frames and movement to convey the emotional and affective resonances of the experiences and places presented to generate the possibility of presence. This article closely examines Time Present and Forgetting Vietnam with a focus on the films’ respective structures and thematic developments and reads them by suggesting the intersecting of remembering and imagining culturally and its potentiality for engaging with absence and silenced histories through decentralized approaches.

A modified method for measuring geometric errors of rotary axes based on sensitivity analysis and error simulation

A modified method for measuring geometric errors of rotary axes based on sensitivity analysis and error simulation

In-situ analysis of an intermodular connection for segmented offshore platforms

In recent years, oil production in the México has decreased. As a result, there is a need for the installation of new offshore platforms, both in currently exploited fields and in future fields. Consequently, it is necessary to design, construct, and install platforms that optimize costs and reduce construction and installation times. To address this, the proposal involves the installation of these structures in segments, with connections made using bolted joint connections that are secure under in situ loading conditions. Under these loading conditions, analysis is conducted through finite element modeling, demonstrating appropriate behavior according to the requirements of current regulations. The implementation of this solution offers an alternative for the installation of offshore platforms, which largely depend on the availability of installation equipment with capacities exceeding 800 tons

Offshore Structures

Globalization has become the main element of business life today and leads to increased competition. The main factors affecting competition in the oil and gas industry are oil/ natural gas prices and demand, exploration and production costs, global production levels, alternative fuels, and government (including environmental) regulations. This scope of work, It deals with the characteristics, design and manufacturing parameters of the fixed offshore platform and the types of platforms used to drill and produce oil/ natural gas under the sea. Especially the formation stages of fixed offshore platform projects are mentioned. Various analyzes need to be made in the process from the decision taken in the construction of the fixed offshore platform, from its design to the manufacturing phase and the time of installation. As in offshore designs, these analyzes should be aimed for other platform structures to build an economical and reliable structure.

Expert perspectives for transoral robotic versus laser surgery for supraglottic carcinomas.

To assess the opinion, practices, and challenges of international key opinion leaders about two minimal invasive surgical techniques in supraglottic laryngeal tumours: transoral laser microsurgery (TLM) and the transoral robotic surgery (TORS). Design of a questionnaire composed of seven sections and fifty questions covering descriptive data of participants, practitioners experience procedural sequences, considerations related to airways, feeding, and voice, intraoperative haemorrhage, postoperative management, and a comparative analysis of TLM and TORS in treating supraglottic laryngeal cancer. A total of 27 head and neck surgeons replied to the survey. The experts had an average experience in laryngeal surgery of 20.0 ± 9.4years, ranging from 5 to 36years. We noted a significantly shorter installation time in TLM compared to TORS (19% of experts estimated the installation time of over 20min with TLM vs 44% with TORS; p = 0.02). According to complications, the experts considered that bleeding was the major concern with supraglottic laryngeal surgery, especially intraoperative bleeding in TLM (52% in TLM vs 26% in TORS) (p = 0.09) and postoperative bleeding in TORS (56% in TORS vs 44% in TLM). The experts did not identify a clear superiority of one technology (TLM) over the other (TORS). The two techniques seemed equivalent to the experts, except for the control of intraoperative haemostasis and visualisation of the surgical field, where TORS was perceived as superior to TLM.

End of tubing placement optimization for multi-stage fractured horizontal wells by transient multiphase flow simulation

End of tubing placement optimization for multi-stage fractured horizontal wells by transient multiphase flow simulation

Design of a quick-connection device for installing pre-assembled offshore wind turbines

Higher wind velocities and lower wind shear are two motivations driving the development of floating offshore wind turbines (OWTs). However, such designs suffer from high expenses and complicated installation scenarios. Installation of offshore wind turbines is challenging due to the unpredictable nature of the environment and the technical complexities, especially at offshore sites. Mating of OWT on top of the pre-installed substructure is one of the critical stages of the installation operation. Grouted, welded, and bolted connections are utilized conventionally, but all have shortcomings. Welded and grouted connections suffer from fatigue forces, while a bolted connection requires minimal installation tolerances and sensitivity to impact forces. The design of a quick connection device (QCD) is expected to reduce the installation time, expand the operational weather window, and overcome the limitations of the earlier connection devices.The QCD described here comprises conic cross-sections, circular plates, and stiffeners connected to the floating substructure and OWT. This research uses a global model to estimate the relative velocities and displacements between the OWT and spar buoy. Furthermore, a local finite element model is developed to assess the influence of the impact forces and the design of the connection device. Implementing the hydrostatic stiffness of the floating spar within the impact simulations improved the simulation fidelity and reduced the impact damage. Different impact scenarios are performed, and the sensitivity of impact damage concerning the distribution of impact initiation points is assessed. Furthermore, an active control mechanism is used to reduce the relative motions between the installation vessel and the floating substructure. It is concluded that utilizing the anti-swing active control system minimizes the impact velocity and impact damage. This research can be extended by optimizing the design of the quick connection device.

Experimental and analytical investigation on the shear behaviour of a demountable interlocking connection applied in precast floor diaphragms

Experimental and analytical investigation on the shear behaviour of a demountable interlocking connection applied in precast floor diaphragms

Application of additive technologies in the treatment of patients with gunshot wounds of the elbow joint

Background: The problem of treating patients with gunshot wounds of the upper extremities, accompanied by destruction of the elbow joint, remains relevant in traumatology and orthopedics at the present time. Aim: To evaluate the medium-term results of surgical treatment of gunshot wounds of the upper extremities with destruction of the elbow joint in complex treatment using additive technologies. Materials and methods: For the period from 2022 to 2024 at the Center for Traumatology and Orthopedics of the Federal State Budgetary Institution “GVKG named after N.N.Burdenko” of the Russian Ministry of Defense treated 25patients with gunshot wounds of the upper extremities accompanied by destruction of the elbow joint using additive technologies. All patients were male, with an average age of 34.5±7.82years. The average time for installation of a custom elbow joint prosthesis after injury was 193±39days. The range of motion in the elbow joint was assessed, and subjective assessment of the results of treatment of patients was determined using 2scales: Quick DASH and Oxford Elbow Score after 3 and 6months. At all stages, computed tomographic. Results: At a follow-up examination after 6 months, most patients showed an improvement in the range of motion. A good result was obtained in 17 (68%) patients, and a satisfactory result in 5 (20%) patients. 3 (12%) patients developed complications in the postoperative period (destruction of the ulnar component of the endoprosthesis in 1patient, deep periprosthetic infection in 2patients), which led to an unsatisfactory result. Thus, the number of patients who achieved successful restoration of elbow joint function using additive technologies was 22 (88%). Conclusion: The use of additive technologies in the treatment of patients with gunshot wounds of the upper extremities, accompanied by destruction of the elbow joint, makes it possible to quickly return to full function of the upper extremity, but the long-term results of this treatment require further study.

Optimal expansion planning of a self-healing distribution system considering resiliency investment alternatives

Optimal expansion planning of a self-healing distribution system considering resiliency investment alternatives

Photovoltaic pumping tests: A novel supervision method for photovoltaic water pumping systems

Photovoltaic pumping tests: A novel supervision method for photovoltaic water pumping systems

Perancangan Perancangan Sistem Trasmisi Mesin Pres Hidrolik Kapasitas 3 Ton Dengan Penggerak Motor listrik

Technological advances have encouraged improvements in the industrial sector in developing countries, including Indonesia. This is of course supported by several factors, including the use of modern equipment as a substitute for human labor. It can be said here that the more modern an industry is, the more machine power is used while the less human power is needed. As human needs become increasingly greater, the machine industry is currently also developing very rapidly. Developments in the industrial sector are marked by the creation of various types of machines that can assist human activities. The use of machines can help human activities or work to be more efficient in terms of completion time, as well as reducing the risk of work accidents. Currently, machines are used as tools that have high automation and precision. Therefore, many people use machines for everything, one of which is a pressing machine. A pressing machine is a tool made to compress or press an object, the power source can come from hydraulics, human power, electric motors and others. The aim of this final project is to design a transmission system for a 3 Ton Semi-Automatic Hydraulic Press Machine with an electric motor drive. It can increase the author's knowledge, insight and experience regarding planning a machine. Conclusion Ball bearings with type 6203 require an installation time of 1 minute 35 seconds and removal of 1 minute 32 seconds. Ball bearings of type 6305 receive a pressure of 400 psi to be installed on the shaft, and when released the pressure produced is the same, namely 400 psi to be able to leave the shaft. A type 6206 ball bearing with a shaft length of 77 mm takes 3 minutes 32 seconds to install, while the same shaft length takes 3 minutes 22 seconds to remove from the shaft.

Выдавливание замкового блока при строительстве транспортных тоннелей большого диаметра

Purpose: to consider the problem of the key-segment extrusion that occurs during the construction of subway tunnels in St. Petersburg using prefabricated high-precision reinforced concrete linings with increased water resistance with a diameter of 10.3 m. To analyze the possible processes leading to this phenomenon and methods of solving the problem in construction conditions. To determine the consequences of the currently used solutions to the problem. To develop an analytical methodology for determining the magnitude of the friction force acting on the radial joints planes of contacting segments based on classical structural mechanics methods (displacement method). To carry out mathematical modeling of the extrusion process by the finite element method and compare its results with those obtained analytically. To develop recommendations for the elimination of block extrusion, which can be both applied in construction conditions and taken into account when designing lining structures. To analyze the effectiveness of the proposed recommendations. Methods: full-scale data from constructed objects, analytical calculations and mathematical modeling by the finite element method were used. Results: an analytical method is proposed for determining the magnitude of the pushing force of the key-segment and the friction force in the radial segment joints. The results of mathematical modeling showed high convergence of the results obtained by the two methods. Recommendations have been developed to eliminate the phenomenon of extrusion, and their effectiveness has been evaluated. Practical importance: the results of the study can be used at the design stage of prefabricated reinforced concrete linings with increased water resistance for large-diameter tunnels, as well as in construction conditions at the time of installation of the key segment.

Pengabdian Kepada Masyarakat (PKM) Edukasi Kecemasan Ibu Dan Dukungan Suami Terhadap Pemilihan Kb Akdr Di Dusun 1 Pekik Nyaring Bengkulu Tengah

According to data from the World Health Organization (WHO), more than 100 million couples use contraceptives in the world using effective contraceptives, with 75% using hormonal contraceptives and 25% using non-hormonal contraceptives. Contraception in the world in 2019 reached 89%, while in 2020 there was an increase to 92.1%. In Africa, it is recorded that 82% of the population does not use contraception. In Southeast, South and West Asia, as many as 43% use contraception (WHO, 2021). Data from the World Health Organization (WHO) for 2020 shows that users of IUD contraceptives throughout the world are still below injectable contraceptives, pills, condoms and implants, especially in developing countries. Exposure to IUDs was below 10%, namely 7.3%, and other contraceptive devices was 11.7%. According to Pekik Nyering Community Health Center data, it was found that the number of IUD users was only 17 people, with a preliminary survey in hamlet 1 Pekik Nyaring numbering 0. Therefore, the author chose IUD/IUD KB counseling. Provide education to women of childbearing age (WUS) and provide knowledge about IUD/IUD contraception, explain the installation of the IUD contraceptive, how it works, types of IUD, mechanism, benefits, side effects, indications and installation time, provide questionnaires to mothers/ Suburban age women regarding the implementation of socialization carried out offline in the 1 Pekik Nyring hamlet hall, attended by 33 residents in 1 Pekik Nyard hamlet. This activity was attended by the cadres. The residents who were actively present in the IUD/AKDR intrauterine contraceptive education program activities. The socialization activities regarding Intrauterine Contraception Methods in the community in Dusun 1 Pekik Nyaring were proven to be effective in increasing knowledge, this was indicated by the results of the pretest and posttest which showed an increase in previous community knowledge. and after the socialization. This activity has an increasingly significant impact because the socialization participants are health cadres who are active in activities related to maternal and child health in the community and are active in inviting residents to pay more attention to health, especially family planning and women's reproductive health.

Global offshore wind turbine detection: a combined application of deep learning and Google earth engine

ABSTRACT As a renewable energy source, ocean wind energy plays an important role in addressing challenges such as global energy shortages and climate warming. In the past decade, the offshore wind power industry has developed rapidly. However, its development has also inevitably affected local social, economic and environmental aspects. Therefore, a timely understanding of offshore wind power dynamics development is crucial for its healthy and sustainable development. Based on this, this study designs and develops a more economical, reliable and real-time offshore wind turbine (OWT) extraction method by combining deep learning and the Google Earth Engine (GEE) cloud computing platform. The method consists of two main steps. The first part utilizes multiple semantic segmentation models to construct a multi-model detection method to initially detect OWTs. The second part utilizes the GEE cloud computing platform for installation time detection and secondary purification processing of the preliminary results. The results show that the number of global OWTs reached 13,609 by 2023, and the accuracy of the detection results reached 99.93%. China has been the fastest-growing country in offshore wind power in the last decade, from installing only 4 units in 2015 to installing 6,775 units in 2023 and surpassing the UK in 2020 and becoming the country building the most OWTs worldwide. Currently, 85% of the world’s OWTs are located in China and European North Sea waters. Additionally, other regions have great potential for offshore wind development. Finally, this study provides the world’s most up-to-date and complete OWT dataset, which can provide data support for research on marine ecological and environmental protection, marine spatial planning, and socioeconomic benefits.