Social Entrepreneurship in Context: Identity Emergence and Legitimation

Community ecologists, who consider the interdependence among organizations of different forms (Hannan and Freeman, 1986), have argued that that legitimacy can flow between organizational forms if they are sufficiently related or proximate in cognitive space (Ruef, 2000). De alio legitimation, the process by which an established population can facilitate the institutionalization of an emergent population, greatly minimizes the time period needed for the new form to achieve a taken-for-granted status (Dobrev, 2001). While some studies have looked at how this process operates across populations of organizations within the commercial sector, no study has looked at how this legitimacy might travel between populations of organizations which vary in their goals, from those following a purely commercial mission to those organizations which follow a social mission, or social enterprises (Mair and Martí, 2006; Phills et al., 2008). Our study fills this gap. Utilizing data from three major social entrepreneurship foundations – Ashoka, Schwab, and Skoll – as well as from the Global Entrepreneurship Monitor, we study the emergence of social entrepreneurship relative to commercial entrepreneurship in three countries: Brazil, Mexico, and India. We show that there is a relationship between the traditional commercial entrepreneurship and the growth of social entrepreneurship. However, varying institutional environments between countries impacts the extent to which social entrepreneurship and commercial entrepreneurship co-evolve

Dynamic model of supercritical Organic Rankine Cycle waste heat recovery system for internal combustion engine

The supercritical Organic Rankine Cycle (ORC) for the Waste Heat Recovery (WHR) from Internal Combustion (IC) engines has been a growing research area in recent years, driven by the aim to enhance the thermal efficiency of the ORC and engine. Simulation of a supercritical ORC-WHR system before a real-time application is important as high pressure in the system may lead to concerns about safety and availability of components. In the ORC-WHR system, the evaporator is the main contributor to thermal inertia of the system and is considered to be the critical component since the heat transfer of this device influences the efficiency of the system. Since the thermo-physical properties of the fluid at supercritical pressures are dependent on temperature, it is necessary to consider the variations in properties of the working fluid. The wellknown Finite Volume (FV) discretization method is generally used to take those property changes into account. However, a FV model of the evaporator in steady state condition cannot be used to predict the thermal inertia of the cycle when it is subjected to transient heat sources. In this paper, a dynamic FV model of the evaporator has been developed and integrated with other components in the ORC-WHR system. The stability and transient responses along with the performance of the ORC-WHR system for the transient heat source are investigated and are also included in this paper

Power Flow and Transient Stability Improvement by Static Synchronous Series Compensator

In the present world, modern power system networks, being a complicated combination of generators, transmission lines, transformers, circuit breakers and other devices, are more vulnerable to various types of faults causing stability problems. Among these faults, transient fault is believed to be a major disturbance as it causes large damage to a sound system within a certain period of time. Therefore, the protection against transient faults, better known as transient stability control, is one of the major considerations for the power system engineers. This paper presents the control approach in the transmission line during transient faults by means of Static Synchronous Series Compensator (SSSC) in order to stabilize Single Machine Infinite Bus (SMIB) system.  In this paper, SSSC is represented by variable voltage injection associated with the transformer leakage reactance and the voltage source. The comparative results depict that the swing curve of a system increases monotonically after the occurrence of transient faults However, SSSC is effective enough to make it stable after a while. DOI: http://dx.doi.org/10.11591/telkomnika.v15i1.807

DATA SECURITY IN IOT DEVICES AND SENSOR NETWORKS FOR ROBUST THREAT DETECTION AND PRIVACY PROTECTION

The rapid proliferation of Internet of Things (IoT) devices and sensor networks has revolutionized various industries by enhancing automation, connectivity, and operational efficiency. However, these advancements have also introduced significant security challenges due to the resource constraints and decentralized nature of IoT environments. This paper provides a systematic review of IoT security solutions, focusing on encryption techniques, authentication protocols, and machine learning-based anomaly detection methods. A total of 55 peer-reviewed articles were analyzed following the PRISMA guidelines. The findings reveal that while lightweight cryptographic algorithms, such as elliptic curve cryptography (ECC), offer robust security with low energy consumption, scalability across large IoT networks remains a challenge. Blockchain-based authentication has emerged as a promising decentralized solution, but issues related to energy consumption and latency hinder its widespread adoption. Machine learning techniques have shown high accuracy in detecting threats in real-time, but their resource-intensive nature limits their application in low-power IoT devices. This review underscores the need for multi-layered, integrated security frameworks and highlights gaps in research on quantum-resistant cryptography and interoperable security standards. Future research must focus on developing scalable, energy-efficient security solutions to ensure data integrity and privacy in expanding IoT ecosystems

Investigation of waste heat recovery system at supercritical conditions with vehicle drive cycles

Waste heat recovery (WHR) for internal combustion engines in vehicles using Organic Rankine cycle (ORC) has been a promising technology. The operation of the ORC WHR system in supercritical conditions has a potential to generate more power output and thermal efficiency compared with the conventional subcritical conditions. However, in supercritical conditions, the heat transfer process in the evaporator, the key component of the ORC WHR system, becomes unpredictable as the thermo-physical properties of the working fluid change with the temperature. Furthermore, the transient heat source from the vehicle’s exhaust makes the operation of the WHR system difficult. We investigated the performance of the ORC WHR system at supercritical conditions with engine’s exhaust data from real city and highway drive cycles. The effects of operating variables, such as refrigerant flow rates, evaporator and condenser pressure, and evaporator outlet temperature, on the performance indicators of the WHR system in supercritical conditions were examined. Simulation of operating parameters and the boundary of the WHR system are also included in this paper

Branding strategies for service firms- a study on the selected Internet Service Providers (ISPs) in Bangladesh

Research work has been done on how to create a brand supporting behaviour but most of the time the existing insights have generally stemmed from research with management, brand practitioner’s and even consumers’ perspectives. Very little has been done to research the employees’ perception towards internal branding and to compare the view of the management and employees’ on internal communication. The existing researches are also done on mostly in the context of the businesses in industrialize countries whereas this research would be an intent to find the internal branding practice in a service firm in a country of developing economy. This would able to identify the gap in the practice of internal branding in different socio-economical context. This research is dedicated to find out both back end and front end skilled employees’ view towards internal communication in a service firm and based on the findings attempt would be done to see whether the staffs perceive their role differently towards the brand. For conducting the research qualitative data were gathered from the qualitative survey by questioning different employee and management about the internal brand communication and the analysis was done on that. With the respondents view on the internal marketing process, the management do not have fully structured plan to implement a sound internal branding strategy. With a given economical constraint it is not always possible to practice all the aspect of management science, but from the study of the company we can see that service firms such as ISP (internet service provider) companies in weaker economical countries could increase the internal communication practice by just altering the existing inter-departmental communication monitored by innovative senior management, co-ordination of HRM and Marketing with input from engineers. &nbsp