How material objects shape student team learning processes

We bring attention to the important, but previously overlooked, role that seemingly mundane material objects in management classrooms can have in student team learning processes. Specifically, we consider how material objects can shape team learning processes. We conducted an inductive qualitative study exploring how teams in an undergraduate strategy course worked together using two types of material objects: (a) whiteboards and (b) flip charts. Our findings indicate that how students interact with material objects when participating in team learning processes is influenced by four properties: (a) object location (static, mobile), (b) record-keeping (temporary, permanent), (c) form (whole, segmented), and (d) sensory awareness. These properties were found to afford student teams different possibilities for using the object which, in turn, shapes team learning processes through the level of agency over embodied learning, the nature of problem-solving behaviors (expansionist or reductionist), and approach to conceptual understanding (synergistic or discrete). The study contributes nuanced insight into the role of material objects in team learning processes and has pedagogical and practical implications for researchers and educators

Clinical Study Delayed Laparoscopic Cholecystectomy Is Safe and Effective for Acute Severe Calculous Cholecystitis in Patients with Advanced Cirrhosis: A Single Center Experience

Acute calculous cholecystitis is a common disease in cirrhotic patients. Laparoscopic cholecystectomy can resolve this problem but is performed based on the premise that the local inflammation must been controlled. An Initial ultrasound guided percutaneous transhepatic cholecystostomy may reduce the local inflammation and provide advantages in subsequent surgery. In this paper, we detailed our experience of treating acute severe calculous cholecystitis in patients with advanced cirrhosis by delayed laparoscopic cholecystectomy plus initiated ultrasound guided percutaneous transhepatic cholecystostomy and provided the analysis of the treatment effect. We hope this paper can provided a kind of standard procedure for this special disease; however, further prospective comparative randomized trials are needed to assess this treatment in cirrhotic patients with acute cholecystitis

Delayed Laparoscopic Cholecystectomy Is Safe and Effective for Acute Severe Calculous Cholecystitis in Patients with Advanced Cirrhosis: A Single Center Experience

Acute calculous cholecystitis is a common disease in cirrhotic patients. Laparoscopic cholecystectomy can resolve this problem but is performed based on the premise that the local inflammation must been controlled. An Initial ultrasound guided percutaneous transhepatic cholecystostomy may reduce the local inflammation and provide advantages in subsequent surgery. In this paper, we detailed our experience of treating acute severe calculous cholecystitis in patients with advanced cirrhosis by delayed laparoscopic cholecystectomy plus initiated ultrasound guided percutaneous transhepatic cholecystostomy and provided the analysis of the treatment effect. We hope this paper can provided a kind of standard procedure for this special disease; however, further prospective comparative randomized trials are needed to assess this treatment in cirrhotic patients with acute cholecystitis

Fabrication of high-performance FeSiCr-based soft magnetic composites using thermal decomposition of salt compounds

Optimising solid-phase reactions at the interface between an iron-based soft magnetic powder matrix and an inorganic oxide ceramic insulating layer in soft magnetic composites is an effective method to overcome the inverse relationship between magnetic conductivity and energy losses in these materials. However, solid-phase reactions at the interface are currently based on using highly reactive aluminium within iron-based soft magnetic powders. Herein, an interface reaction between ZnSO4 and FeSiCr was successfully conducted to afford formation of FeSiCr-based soft magnetic composites, which are characterised by a three-layer structure comprising FeSiCr, a Si and Cr-rich layer and a ZnO·SiO2·Cr2O3 composite insulating layer. Thermal decomposition of ZnSO4 releases O2, which induces the migration of Cr and Si atoms from the FeSi3.7Cr4.5 soft magnetic powder matrix towards the interface and their subsequent reaction; this increases the magnetic phase content and enhances the crystalline structure order of the powder matrix. Furthermore, the ZnO·SiO2·Cr2O3 composite insulating layer effectively insulated the FeSiCr soft magnetic powder matrix. The resulting FeSiCr-based soft magnetic composite materials with the ZnO·SiO2·Cr2O3 composite insulating layer exhibit low core losses (58.5 kW/m3), high magnetic permeability (39.1) and high saturation magnetisation (166.5 emu/g), indicating they are an ideal choice for high-performance electromagnetic components. The proposed innovative strategy of oxygen release through the thermal decomposition of salt compounds affords an insulating coating on soft magnetic composite materials fabricated based on interfacial solid-phase reactions