Abstract Powder-bed-based additive manufacturing involves melting of a powder bed using moving laser or electron beam as heat source. In this paper, we formulate an optimization scheme that aims to control type melting. The goal consists tracking maximum temperatures on lines run along the path. Time-dependent parameters (more specifically, power, spot size, and speed) act functions. is greedy ...

We tested a threshold-based bed bug (Cimex lectularius L.) management approach with the goal of achieving elimination with minimal or no insecticide application. Thirty-two bed bug infested apartments were identified. These apartments were divided into four treatment groups based on apartment size and initial bed bug count, obtained through a combination of visual inspection and bed bug monitor...

A neutral beam injection (NBI) system has been developed and is being tested for an Experimental Advanced Superconducting Tokamak (EAST) device. The NBI system needs to be employed for an auxiliary heating and current drive of EAST plasmas. The first long pulse ion source (LPIS-1) has been installed in the neutral beam test bed (NBTB) system, and the performance is being tested in the NBTB. The...

Introduction: In the treatment of breast cancer, breast conserving surgery (BCS) and whole breast irradiation is a usual technique. The influence of lumpectomy boost following breast radiotherapy is apparent, but there are different delivery methods. This work intended to compare the dosimetric parameters of electron beams and photon beams for boosting irradiation in breast can...

Infestations caused by bed bugs have resurfaced during the past decade across all continents. Even though bed bugs primarily cause skin manifestations in humans, a major stigma is placed upon people or institutions found to carry them. It is important for healthcare facilities to be prepared for this pest by implementing policies, carefully selecting materials used for hospital furniture, and e...

A uniform distribution of power density (energy flux) in a stationary laser beam leads to decrease the overheating material center spot during powder bed fusion and losses due its thermal ablation chemical decomposition. The profile cylindrical (flat-top) was compared classical Gaussian mode (TEM00) inverse (donut) (airy first harmonic, TEM01* = TEM01 + TEM10). Calculation Péclet number, which ...

Metal powder bed-based Additive Manufacturing (AM) technologies, such as Electron Beam-Melting (EBM) and Laser Powder Bed Fusion (LPBF), are established in several industries due to the large design freedom mechanical properties. While EBM LPBF have similar operating steps, process-specific characteristics influence component design. The differences energy coupling lead differing solidification...

introduction: conventional methods for diagnosis of external root resorption (err) are based on clinical findings and x-ray observations which are not appropriate for early diagnosis. the present study assessed the effect of different sizes and field of views (fovs) in the diagnosis of simulated external root resorption by cone-beam computed tomography (cbct). methods and materials: in this dia...