Recording Media Research Articles

Observation of Bacteriophage Ultrastructure by Cryo-Electron Microscopy.

Transmission electron microscopy (TEM) is an ideal method to observe and determine the structure of bacteriophages. From early studies by negative staining to the present atomic structure models derived from cryo-TEM, bacteriophage detection, classification, and structure determination have been mostly done by electron microscopy. Although embedding in metal salts has been a routine method for virus observation for many years, the preservation of bacteriophages in a thin layer of fast frozen buffer has proven to be the most convenient preparation method for obtaining images using cryo-electron microscopy (cryo-EM). In this technique, frozen samples are observed at liquid nitrogen temperature, and the images are acquired using different recording media. The incorporation of direct electron detectors has been a fundamental step in achieving atomic resolution images of a number of viruses. These projection images can be numerically combined using different approaches to render a three-dimensional model of the virus. For those viral components exhibiting any symmetry, averaging can nowadays achieve atomic structures in most cases. Image processing methods have also evolved to improve the resolution in asymmetric viral components or regions showing different types of symmetries (symmetry mismatch).

Granular micromagnetic HAMR model: investigation of damping dependence and parametric optimization for high performance

Heat assisted magnetic recording (HAMR) is a novel high-density magnetic recording technology that relies on thermal assist from a laser during the writing process. To achieve high writing performance, it is important to study and optimize the crucial factors affecting the magnetization reversal mechanism at elevated temperature. In this work, we use a multiscale approach that combines atomistic and micromagnetic models to study the magnetization reversal behavior in the recording medium. The atomistic model allows to parameterize accurately the macroscopic approach, which is utilized to model the system and its dynamics. We perform a parametric investigation of the switching properties as a function of the HAMR setup characteristics as well as the material properties, such as magnetic damping. The results show that high damping and moderate external fields can achieve high-performance HAMR media characterized by high switching probability, short switching time and low peak temperature. We demonstrate that switching occurs via the linear reversal mechanism. By systematic variation of the longitudinal susceptibility we force a transition to coherent reversal and demonstrate that this reduces the switching probability, showing linear reversal to be an important component within the HAMR process.

Improvement in the structural, magnetic and electromagnetic behaviour of barium hexaferrites with yttrium doping for EMI shielding

Electromagnetic interference (EMI) shielding is critical for protecting electronic devices from interference generated by various sources such as power lines, radio waves, microwaves, and electronic devices. In this current study, we present a thorough investigation of the structural, magnetic, and electromagnetic properties of Y3+ doped M-type barium nano hexaferrites. Polycrystalline BaFe12−xYxO19 (x = 0.0, 0.3, 0.5, 0.7, and 0.9) hexaferrites are prepared using the citrate precursor method. The results of X-ray diffraction (XRD), Rietveld refinement and Raman spectroscopy confirmed that all samples have a single-phase, and pure hexagonal crystalline structure with space group P69/mmc. This result is consistent for all the prepared compositions. The structure and dopant materials in different chemical states of the sample are determined based on the X-ray photoelectron spectroscopy (XPS) spectrum. Field emission scanning electron microscopy (FESEM) analysis showed that the particles had a distinct hexagonal morphology. The chemical composition of the prepared hexaferrites is investigated using energy dispersive X-ray analysis (EDAX). UV spectroscopy showed an inverse relationship between the molar ratio of yttrium and the band gap. Vibrating sample magnetometer (VSM) results showed a decrease in saturation magnetization (Ms) and coercivity (Hc) with increasing fraction of yttrium ions. The shielding efficiency (SE) of the synthesized hexa materials against EMI is evaluated using a vector network analyser (VNA). In particular, effective EMI shielding was observed in the frequency spectra of 8–12 GHz (X-band region). Among the tested compositions, BaFe12–0.7Y0.7O19 with a thickness of 3 mm exhibited highest SE of 80.07 dB in the X-band region. The proposed yttrium-substituted barium M-type hexagonal ferrites exhibit significant reflection loss with enhanced absorption spectrum even when applied to an extremely thin 3 mm material, making it a possible preference as the radar-absorbed compound for EMI attenuators for weather monitoring, radar tracking, air traffic management, and gigahertz antennas. Furthermore, commercial applications including long-term magnetic media for recording, storing information, etc. are possible uses of the synthesised magnetic yttrium-doped barium M-type hexagonal ferrites.

Research On Intelligent Engineering Management System Based on Rfid

The radio frequency electron label technology is one kind of automatic diagnosis technology, its through the wireless radio frequency way carries on the non-contact two-way data communication, utilizes the wireless radio frequency way to the record media to carry on the renewal, thus achieves the recognition target and the exchange of the data purpose. The radio frequency electron label technology's appearance, causes the article to scan when may to the supply chain in the product logistics information to carry on the sharing and the real-time tracking, fully combines the modern information technology, establishes the supply chain and the seller between the information interaction, objectively improves the supply chain and the logistics management standardization. In addition, based on the radio frequency electron label technology and establishes the wisdom project management system through carries on the data interaction, realizes the long-distance range reads, the non-contact recognition, the rapid readout, the simultaneous processing many labels the data and so on the operation, may help the enterprise operator to do well the material recognition work, satisfies the enterprise practical demand practically.

Information multiplexing from optical holography to multi-channel metaholography

Abstract Holography offers a vital platform for optical information storage and processing, which has a profound impact on many photonic applications, including 3D displays, LiDAR, optical encryption, and artificial intelligence. In this review, we provide a comprehensive overview of optical holography, moving from volume holography based on optically thick holograms to digital holography using ultrathin metasurface holograms in nanophotonics. We review the use of volume holograms for holographic multiplexing through the linear momentum selectivity and other approaches and highlight the emerging use of digital holograms that can be implemented by ultrathin metasurfaces. We will summarize the fabrication of different holographic recording media and digital holograms based on recent advances in flat meta-optics and nanotechnology. We highlight the rapidly developing field of metasurface holography, presenting the use of multi-functional metasurfaces for multiplexing holography in the use of polarization, wavelength, and incident angle of light. In the scope of holographic applications, we will focus on high bandwidth metasurface holograms that offer the strong sensitivity to the orbital angular momentum of light. At the end, we will provide a short summary of this review article and our perspectives on the future development of the vivid holography field.

Effect of La3+/Cu2+ and La3/Ni2+ substitution on the synthesis, magnetic and dielectric properties of M−type Sr1-xLaxFe12-xMxO19 (M = Cu and Ni) hexaferrite

Here, we report a comprehensive study to explore the synthesis and comparative analysis of co-substituted M−type La3+/Cu2+ and La3+/Ni2+ hexaferrite (Sr1-xLaxFe12-xMxO19 where M = Cu and Ni; (x = 0.0, 0.05, 0.1, 0.15, and 0.2)) prepared through the sol–gel auto-combustion approach. X-ray diffraction (XRD) analysis shows both systems' single-phase structure of Sr hexaferrite. The structural parameters decreased as the number of substituted ions increasedas the crystal lattice contracts due to the smaller ionic radii being doped. Theaverage crystallite sizes were found using the Scherrer equation using the highest intensity peaks, and the results show nano-sized particles. The morphological structure of Sr-hexaferrite was studied using Field Effect Scanning Microscopy (FESEM). As a result, irregularly shaped particles with slight agglomeration are observed on the topography in both systems. Two absorption bands were observed in all synthesised samples' Fourier-transformed infrared spectroscopy (FTIR) spectra, supporting the ferrite's formation. These materials are a good option for high-density recording media. Both samples show high magnetic natures, which can be observed from the hysteresis loop. Overall, the room temperature magnetic parameters measured slightly increase as the dopant materials increase. The squareness ratio of the synthesizedsamples shows the uniaxial anisotropy with single magnetic domain particles. The Maxwell-Wagner and Koop model clarifies the reason the dielectric characteristics exhibit the typical behavior of ferrites.

Effect of Cr substitution on nickel spinel ferrite’s surface morphology, structure, antibacterial activity and magnetic properties

This study reports the sol–gel auto-combustion (SGACT) synthesis of Cr-substituted NiFe2O4 nanoferrites with a composition, of CrxNi(1−x)Fe2O4 (where x = 0.000, 0.025, 0.050, 0.100, 0.150, 0.200), and it examines the effects of chromium on spinel ferrite’s structure and properties. The doping of Cr at the nickel site is first reported in the present study. The computed crystallite size “t” from the XRD results was found in the range of 34.2–40.4 nm, whereas, FESEM plots show larger-sized grains due to the aggregation of a large number of crystallites for the produced nanoferrites. Maximum saturation magnetization of 42.44 emu/g was attained by the Cr0.050Ni0.950Fe2O4 (x = 0.050) specimen, whereas, the Cr0.200Ni0.800Fe2O4 (x = 0.200) specimen attains the maximum coercivity in the current study. All these excellent values of magnetic parameters make our SGACT-produced nanoferrites useful for magnetic recording media applications. In S. aureus, Cr0.200Ni0.800Fe2O4 nanoparticles showed the highest zone of inhibition (ZOI) whereas, Cr0.050Ni0.950Fe2O4 nanoparticles showed the least ZOI. On the other hand, in E. coli, Cr0.850Ni0.150Fe2O4, Cr0.200Ni0.800Fe2O4 and Cr0.050Ni0.950Fe2O4 nanoparticles showed good ZOI. This makes our developed nanoferrites beneficial for biological applications as antibacterial agents.

Dielectric, reflection loss and physicochemical studies of Cr doped Ba–Sr based W type hexagonal ferrites for microwave absorption applications

The utilization of hexagonal structures in nano ferrites has been employed for absorption because of their dielectric, attenuation characteristics, and reflection losses. Electromagnetic pollution is one of the significant issues in cleaning the environment. Electronic devices produce pollution and are hazardous to human health. Therefore, ferrite materials have been used for absorption purposes. In this study, the impact of chromium substitution on the structural and dielectric specifications of the Barium-strontium-based W-type hexagonal ferrites has been investigated and used for microwave absorption application. The sol-gel auto-ignition process prepared w-type hexagonal ferrites with Ba0.5Sr0.5Mg2CrxFe16-xO27 (x = 0.0, 0.1, 0.2, 0.3, and 0.4). According to XRD examination, the formation of single-phase W-type hexagonal ferrites was proven. The synthesized composition is confirmed to be nanocrystalline because the calculated crystallite size value is in the nanometer range. FTIR analysis confirmed the structure of W-type hexagonal ferrite. Raman spectroscopic study examined the vibrational and rotational modes of molecules. Survey spectra of XPS, which include Ba, Sr, Mg, Fe, Cr, and O, confirmed the presence of all constituent elements. SEM analysis confirmed that the sample contains grains with a hexagonal platelet shape. The results showed that increasing chromium concentration reduced the dielectric permittivity, tan loss, and ac conductivity. At x = 0.4, the reflection loss value is very low. The recorded value is −79.62 dB, corresponding to a frequency of 5.92 GHz, with a thickness of 1.75 mm. Because of this, W-type hexagonal ferrites are suitable for a wide range of electronic applications, including microwave absorbers, high-density recording media, and multilayer chip inductors. These applications have made it possible to functionalize these materials in order to enhance device performance and lower the size, weight, and cost of devices while also fostering the development of new technologies that have significantly improved the quality of our daily lives.

Fabrication and magnetic properties of pulse electrodeposited FeSn nanowire arrays

When it comes to fabricating efficient nanomaterials for magnetic recording media and spintronic devices, Fe-based nanowires (NWs) containing nonmagnetic elements can represent themselves as one of ideal candidates. Here, a pulse electrodeposition method in porous anodic alumina membranes is employed to fabricate Fe100-xSnx (2 ≤ x ≤ 68) NW arrays with a diameter of about 35 nm. During the NW fabrication, Sn electrolyte concentration (CSn) and off-time (Toff) between pulses change in the range from 0.0025 to 0.02 M and 0–75 ms, respectively. As a general trend, magnetic properties including coercivity and squareness values decrease with increasing the Sn content. Meanwhile, first-order reversal curve diagrams show single domain and pseudo-single domain states of the FeSn NWs, depending on the Sn content in the structure dominated by Fe or FeSn alloy crystal phase. Magnetostatic interactions and coercive field distributions are also observed to significantly change by varying CSn and Toff, providing magnetically tunable FeSn NW arrays induced by the nonmagnetic element addition.

Simulation Analysis of Thermal Decay and Read-Write Characteristics Depending on the Structure of Sputtered Tape Media

We developed a magnetic recording simulator that takes into account thermal agitation by employing a probabilistic switching model based on the Arrhenius-Neel equation. Using this simulator, we investigated the impact of Capped and <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">H_k</i> -Graded media on sputtered perpendicular media for magnetic tape recording. Our simulation results were in good agreement with the experimental data, as evidenced by the consistency of the M-H curves and read-write characteristics. Specifically, we found that the use of Capped media enhances writability, but it also increases the transition noise, while Graded media has no significant effect on writability. Furthermore, our thermal decay simulation showed a correlation between the reproduction output decay and the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">M_r/M_s</i> decay, and no clear relationship between the media SNR decay over time and the media <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">K_uV/k_BT</i> . These findings illustrate the potential of our simulator as a valuable tool for designing magnetic media.

Records in social media: a new (old) understanding of records management

PurposeSocial media posts have been an integral part of our society’s communication and serve purposes from the personal to the national, from the mundane to the silly to the momentous. This study aims to examine social media posts as records, discussing how social media technology serves, perhaps unexpectedly, to reinforce traditional archival understandings of issues such as provenance, custody, access, disposition and preservation.Design/methodology/approachThis study follows a four-step methodology. First, this study analyzes literature for a matching definition of the social media record. In the second step, we appraise three social media postings previously curated and cited in news articles by journalists to determine their characteristics – Are these social media posts “records?” Third, this study evaluates the sample records against two dominant theoretical record models, the life cycle and the continuum and attempt to apply the model specifications to the data samples. Finally, this study proposes appropriate records management solutions to address governance issues from the study findings in the conclusion section.FindingsThis study shows that, even by the most traditional of definitions, social media posts are records. The paper also demonstrates that platform mediation transforms simple narrative documents into records whose provenance, custody and control are dictated by platform logics and governance, outside of the control of their creators. Through appraisal of a small sample of “important” social media posts, this study illustrates that, rather than obsolete, traditional records management concepts and approaches are necessary to ensuring the ongoing accessibility, usability and evidentiary character of social media posts in the broader “platformized” context.Research limitations/implicationsThis is exploratory, theoretical work. In future works, this study plans to expand and validate aspects of this study.Originality/valueThis paper tests existing theoretical frameworks, namely, the Records Life cycle and the Records Continuum for applicability to the social media record. The paper also offers a view of the potential for traditional archival and records management concepts in service of a just and inclusive recordkeeping, because such concepts allow us to demonstrate the centralized, elite-serving, bureaucratic structures which underpin social media records are obscured by the seemingly decentralized, participatory nature of social media.

Resonance cavity-enhanced all-optical switching in a GdCo alloy absorber

In spintronic applications, there is a constant demand for lower power consumption, high densities, and fast writing speed of data storage. All-optical switching (AOS) is a technique that uses laser pulses to switch the magnetic state of a recording medium without any external devices, offering unsurpassed recording rates and a simple structure. Despite extensive research on the mechanism of AOS, low energy consumption and fast magnetization reversing remain challenging engineering questions. In this paper, we propose a newly designed cavity-enhanced AOS in GdCo alloy, which promotes optical absorption by twofold, leading to a 50% reduction in energy consumption. Additionally, the time-resolved measurement shows that the time of reversing magnetization reduces at the same time. This new approach makes AOS an ideal solution for energy-effective and fast magnetic recording, paving the way for future developments in high-speed, low-power-consumption data recording devices.

Synthesis and tailoring the structural and magnetic characteristics of Zn–Zr substituted Sr-hexaferrite targeting diverse applications

SrZnxZrxFe12-2xO19 (x varying within 0.1–0.4) samples were prepared successfully via solid state route. Their structural characteristics (along with microstructural and magnetic) have been discussed. Rietveld refinement established the phase purity for the samples x ≤ 0.3 (goodness-of-fit <1.15) whereas the presence of ZnFe2O4 and SrZrO3 impure phases was observed in x = 0.4 sample. The three-phase model resulted in decreasing χ2 values from 1.21 to 1.05 for x = 0.4 sample. The XRD findings also reveal an increasing cell volume from 690.675 Å3 (x = 0.1) to 693.096 Å3 (x = 0.3) and a decreasing porosity from 33% to 30% on increasing ˋx’. The average grain size increases from 0.83 μm to 1.04 μm according to FESEM micrographs with increasing ˋx’. The TEM measurements reveal the presence of rod like particles (in addition to random shaped particles) in x = 0.1–0.3 samples. M v/s H studies reveal, and increase in Ms from 90.26 emu/g (for x = 0.0) to 91.41 emu/g (for x = 0.1) and a decreasing trend afterwards to 87.90 emu/g (at x = 0.3). Hc value continuously decreases from 5032 Oe (for x = 0.0) to 1903 Oe (for x = 0.4). Low temperature M − H and M-T measurements coupled with room temperature M − H measurements reveal the absence of superparamagnetic behaviour. The magnetic data suggest that all the samples possess hard ferrite characteristics and could be useful for microwave absorbers, permanent magnets as well as high-density recording media applications.

Investigation on the structural, morphological and magnetic properties of Ca1-xEuxFe12-yTiyO19 hexaferrite system

M-type hexaferrites have a significant economic impact, due to their permanent magnet behaviour which plays key role in the conversion of renewable and green energy. The present investigation focuses on the synthesis of M-type Ca1-xEuxFe12-yTiyO19 hexaferrite (0.00 ≤ x, y ≤ 0.07) through the solid-state reaction method. The X-ray diffraction, Fourier Transform Infrared spectra and Raman spectroscopy confirms the presence of an M-type hexagonal structure unequivocally with the minor impurity of α-Fe2O3. Using Field Emission Scanning Electron Microscopy images reflects the surface morphology and anticipated grain size was within the range of 1.65–2.26 μm. Energy-dispersive X-ray analysis and High-Resolution X-ray photoelectron spectroscopy (HRXPS) confirms the elemental composition and the oxidation states of the elements by HRXPS. The magnetic characteristics is focused around the examination of physical phenomena and rigorous application of theoretical calculations of coercivity Hc, remanent magnetization Mr, saturation magnetization Ms, magneton number ηβ, squareness ratio (SQR) Mr/Ms ≤ 0.5 and Anisotropy constant Ka. The obtained samples exhibit a notable phenomenon of inter-grain group interaction and the compatibility of the material under investigation with high-frequency devices and its potential as high-density recording media.

Polymer-Assisted Synthesis, Structure and Magnetic Properties of Bimetallic FeCo- and FeNi/N-Doped Carbon Nanocomposites

Bimetallic FeCo and FeNi nanoparticles attract much attention due to their promising magnetic properties and a wide range of practical applications as recording and storage media, catalytic systems in fuel cells, supercapacitors, lithium batteries, etc. In this paper, we propose an original approach to the preparation of FeCo- and FeNi/N-doped carbon nanocomposites by means of a coupled process of frontal polymerization and thermolysis of molecular co-crystallized acrylamide complexes. The phase composition, structure, and microstructure of the resulting nanocomposites are studied using XRD, IR spectroscopy, elemental and thermal analysis, and electron microscopy data. The main magnetic characteristics of the synthesized nanocomposites, including the field dependences and the ZFC-FC curves peculiarities, are studied. It is shown that the obtained FeCo/N-C nanocomposites exhibit exchange bias behavior at low temperatures. In turn, FeNi/N-C nanocomposites are ferromagnetically ordered.

Control of grain density by varying lattice mismatch in FePt-C film for heat assisted magnetic recording

Controlling the number density of grains in magnetic recording media is critical for improving the areal density of the recording. Herein, we report the dependence of grain density and microstructure of FePt-based granular films for heat-assisted magnetic recording media on the lattice mismatch between the FePt films and substrates SrTiO3, MgAl2O4, MgO and TiO2. The grain density and grain size of the FePt films increased and decreased, respectively, with the increasing lattice mismatch between the films and substrates. The optimum lattice mismatch for the FePt-based granular films was found to be 8%, which corresponds to the MgO substrate. FePt films grown on TiO2 substrate, which had the largest lattice mismatch of 16%, showed poor morphology and low grain density. The results imply that an underlayer with which a film develops a suitable mismatch plays a key role in controlling the microstructure and magnetic properties of the film.

Effect of ultraviolet exposure and thermal treatment on NaF micro-crystallization mechanism in photo-thermo-refractive glasses

Photo-thermo-refractive (PTR) glass is a promising recording medium for volume-holographic devices. The recording processes involve a series of steps including ultraviolet (UV) exposure, nucleation, and crystallization thermal treatment. Sodium fluoride (NaF) microcrystals precipitate after crystallization, and modulate the refractive index locally of the glass matrix. In this study, to simulate the volume Bragg grating recording processes and study the effect of photothermal-induced processes on the crystallization kinetics in PTR glass, Si-Al-Na-Zn-K PTR glasses with and without Br− ions were prepared using the melt-quenching method. The UV exposure duration, thermal treatment temperature and crystallization time were regulated during subsequent treatment. During these processes, Br-free samples were used for comparison to demonstrate the potential roles of Br−ion in the nucleation and crystallization. The Ag nanoparticle (NP) nuclei surrounded by AgBr (AgF) microcrystals were characterized using UV–visible absorption spectroscopy and transmission electron microscopy, and the changes in the precipitated NaF were characterized using X-ray diffraction, Raman spectroscopy as well as XPS. The mechanism of NaF micro-crystallization is disclosed based on above experimental results. It is found the formation of Ag nanoparticle surrounded by AgBr (AgF) microcrystals inhibits the crystallization kinetics of NaF microcrystals in PTR glass.

Relationship between pollination syndromes, pollen morphology and plant ecology in Quaternary deposits of the Cerrado

This study presents morphological descriptions and ecological information for 58 terrestrial pollen taxa and seven water-related pollen taxa from the Brazilian Cerrado, obtained from two sediment cores, Lake Feia (LFB1) and Getulio Swamp (VGE-17), encompassing the last 5000 and 15,000 cal yr BP, respectively. The relationships between the ecological and morphological traits (pollination syndrome, vegetation stratum and grain size) within each of the two depositional environments were investigated. In the LFB1 core, the pollen assemblages were dominated by arboreal pollen from closed physiognomies and lower storey trees (<10 m in height), while a combination of closed and open physiognomies was observed in the pollen assemblages from the VGE-17 core. The vast majority of the pollen taxa exhibited the entomophilous pollination syndrome, and a higher influx of entomophilous pollen was observed in both cores. Anemophilous and anemophilous/entomophilous syndromes were less well represented. Small and medium pollen grain classes were the most abundant, while the large pollen grain class was rare. The influx of small pollen grains was slightly more abundant in the lake record, while in the swamp record medium pollen grains were more abundant. Our results show that swamps and lakes differ in their representation of local versus regional pollen and in their sensitivity and responses to water-level changes. Landscape physiognomy also influences pollen dispersion: a closed physiognomy increases the local pollen signal, while a more open physiognomy results in better representation of local and regional signals.

Synthesis, characterization, and applications of doped barium hexaferrites: A review

Barium hexaferrite is a ceramic material with a hexagonal crystal structure that is widely used in various applications such as microwave devices and, magnetic recording media due to its excellent magnetic and electromagnetic traits. This material is composed of barium, oxygen, and iron and has the chemical formula, BaFe12O19. The barium hexaferrite (BHF) exhibits magnetic anisotropy, high magnetization, and high coercivity, making it a preferred material for use in magnetic devices. This review paper presents an overview of the synthesis methods, crystal structure, magnetic traits, and various applications of BHF. The various synthesis approaches discussed include hydrothermal, microemulsion approach, solid-state approach, co-precipitation, and a few other techniques. The effect of various elemental doping on the optical, magnetic, electromagnetic, as well as the structural characteristics of BHF are discussed in detail. Additionally, the different applications of BHF are discussed, including its use in microwave devices, magnetic recording media, water purification, biomedical, and permanent magnet. This review provides a comprehensive assessment of the current state of knowledge on BHF, and highlights its potential for use in a number of technological applications.

SOCIALIZATION OF MEDICAL RECORD DESTRUCTION PROCEDURE AT PUBLIC HEALTH CENTER WORKING AREA OF KULON PROGO HEALTH DEPARTMENT

Medical record is a document that is used as a media record in serving patients at the health center. Theimplementation of recording using paper media turned out to have several weaknesses including the needfor storage space. Storage space in each public health center has limitations due to the area of the room,the number of rooms, and the availability of storage shelves. The number of medical records will continueto increase at any time, so it is necessary to carry out activities to destroy medical records according toapplicable policies. The results of a preliminary study with the Head of the DPC PORMIKI Kulon Progo andthe Head of 6 public health center Installation, the obstacles faced by the public health center in the KulonProgo Health Office work area are 1) There is no special room for storing inactive medical records due tolimited space, 2) It cannot be destroyed because there are several extermination procedures that involveexternal parties, namely archivists, 3) Lack of medical record and health information graduates in eachhealth center, so they do not understand the procedure and management of medical record disposal. Thisactivity was attended by 120 participants which was held online and offline while adhering to healthprotocols during the Covid-19 Pandemic. The method of implementing this activity is by conductingoutreach to HIM at the Kulon Progo Health Center. This activity includes the presentation of material byresource persons as PMIK experts and resource persons from the Archives and discussions withparticipants. The resulting outputs are 1) procedures and procedures for the destruction of medical records2) optimization and ease of knowledge of PMIK officers in the destruction process which can involve theauthorities.