http://trepo.tuni.fi:80 Trepo on Tampereen yliopiston avoin julkaisuarkisto. Sat, 15 Aug 2026 11:45:58 GMT 2026-08-15T11:45:58Z http://trepo.tuni.fi:80/handle/10024/239737 Functional Robustness of Self-Healing Passive UHF RFID Tag to Mechanical Damage Javed, Muhammad Usama; Hakala, Minna; Tolvanen, Jarkko; Björninen, Toni; Juuti, Jari; Pournoori, Nikta; Ukkonen, Leena This paper evaluates the functional reliability of self-healing passive UHF RFID tags under mechanical damage. We fabricated 39 dipole-type tags in five conductor-thickness groups (100−300μm), using a self-healing elastomer blend. The primary performance metric, read range, was characterized within the 860−960MHz band for pristine tags and after controlled damage, including cuts and natural cracking. Read range recovery was quantified at intervals over 24 hours. Our results demonstrate a strong dependence on conductor thickness: tags with thicker conductors (≥200μm) retained measurable functionality, whereas thinner conductors were nearly non-functional after damage. While natural cracks proved most detrimental, reducing read range by over 70%, the self-healing mechanism successfully restored acceptable performance. These findings, supported by electromagnetic simulations, validate a robust and self-repairing antenna approach, despite the low polymer conductivity (∼150S/m) relative to metals. Future work will focus on improving conductivity, IC-radiator bonding, and developing waterresistant layouts to enhance durability. Thu, 01 Jan 2026 00:00:00 GMT http://trepo.tuni.fi:80/handle/10024/239737 2026-01-01T00:00:00Z http://trepo.tuni.fi:80/handle/10024/239736 Localized Diversity, Equity, and Inclusion: Challenges and Solutions in Game Culture Environments Taino, Essi; Laakso, Kalle; Myöhänen, Taina; Friman, Usva; Sotamaa, Olli Regional, cultural, and structural specificities across game cultural sectors are integral to impactful, intersectional initiatives. In our workshop-based participatory study, we invited diversity, equity, and inclusion (DEI) experts from key Finnish game cultural organizations to examine the state of DEI in digital game cultural environments. The data was collected from two online co-design workshops with eight participants and analyzed using qualitative content analysis. We noted that while Finnish DEI initiatives have developed significantly, diversity efforts are primarily focused on gender equality over other types of diversity. Organizations rely on collective action and sharing information on best practices through events, training, and game literacy education. Initiatives are heavily affected by the policies and subsidies of public agencies. Proposed solutions suggest increasing structured activity, pooling resources, and the creation of a national game cultural strategy supporting sustainable development across sector divides. Tue, 16 Jun 2026 00:00:00 GMT http://trepo.tuni.fi:80/handle/10024/239736 2026-06-16T00:00:00Z http://trepo.tuni.fi:80/handle/10024/239735 Accounting for non-financial values under conditions of financialisation: the evolution of impact accounting practices at Finnfund 2001–2023 Ylönen, Niina; Tiikkainen, Olli As accounting expands into the terrain of social and environmental impact, it must mediate between multiple and often competing evaluative principles. Although prior research shows that accounting plays an essential role in organising multiple values, less is known about how such reconciliation unfolds within a financialising setting. Hence, this paper asks: How does impact accounting organise multiple modes of evaluation as it evolves in a financialising setting? Conceptualising financialisation as a shift in socio-technical valuation processes, the study examines Finnfund, a Finnish Development Finance Institution and impact investor, as its empirical case. Based on a longitudinal analysis of Finnfund’s public documents 2001–2023, the paper shows that financialisation can occur in impact accounting by reshaping the formats, devices and modalities through which evaluation takes place, without turning the objects of valuation into monetary units or financial assets. The findings further show that impact accounting practices can provide combinations of, rather than compromises, between financial and impact modes of (e)valuation. While such combinations are seen as enabling value pluralism, they may also facilitate a strategic separation of financial and impact considerations, troubling the extent to which impact accounting practices changes the existing rationales and goals of impact investors and other organisations. Fri, 03 Jul 2026 00:00:00 GMT http://trepo.tuni.fi:80/handle/10024/239735 2026-07-03T00:00:00Z http://trepo.tuni.fi:80/handle/10024/239734 A Self-Triplexing Circularly Polarized MIMO Antenna Enabling Transcranial Wireless Powering and Telemetry for IoMT Brain Implants Shah, Nazim Syed; Basir, Abdul; Nasir, Jamal; Björninen, Toni; Laso, Miguel A. G. In this paper, a compact six-port, triple-band, circularly polarized multiple-input and multi-output (MIMO) implantable antenna with self-triplexing capability is presented for intracranial applications. The antenna occupies a footprint of 12.4 × 14 × 0.2 mm3. It operates at 915, 1710, and 2450 MHz across the ISM and MedRadio bands. It achieves circular polarization with 3-dB axial-ratio bandwidths of 17.7%, 4.1%, and 7.4%. Mutual coupling is inhibited by meander-line patches with isolation levels of 25 dB or more, without the use of shorting vias, ground-plane slots, or decoupling circuits. Simulated realized gains of -39.6, -38.5, and -35.1 dBi at 0.915, 1.71, and 2.45 GHz, respectively, and low SAR values guarantee safety compliance. Link-budget analysis guarantees reliable communication with minimum coverage distance of 5.1 m for high data rates of 10, 78, and 120 Mbps. The antenna performance is analyzed using MIMO performance and diversity analysis in lossy, multipath tissue conditions. Thu, 01 Jan 2026 00:00:00 GMT http://trepo.tuni.fi:80/handle/10024/239734 2026-01-01T00:00:00Z