Vibration-Based structural health monitoring using piezoelectric transducers and parametric t-SNE

In this paper, we evaluate the performance of the so-called parametric t-distributed stochastic neighbor embedding (P-t-SNE), comparing it to the performance of the t-SNE, the non-parametric version. The methodology used in this study is introduced for the detection and classification of structural changes in the field of structural health monitoring. This method is based on the combination of principal component analysis (PCA) and P-t-SNE, and it is applied to an experimental case study of an aluminum plate with four piezoelectric transducers. The basic steps of the detection and classification process are: (i) the raw data are scaled using mean-centered group scaling and then PCA is applied to reduce its dimensionality; (ii) P-t-SNE is applied to represent the scaled and reduced data as 2-dimensional points, defining a cluster for each structural state; and (iii) the current structure to be diagnosed is associated with a cluster employing two strategies: (a) majority voting; and (b) the sum of the inverse distances. The results in the frequency domain manifest the strong performance of P-t-SNE, which is comparable to the performance of t-SNE but outperforms t-SNE in terms of computational cost and runtime. When the method is based on P-t-SNE, the overall accuracy fluctuates between 99.5% and 99.75%.Peer ReviewedPostprint (published version

PENINGKATAN PENERIMAAN DIRI MELALUI KONSELING KELOMPOK PADA SISWA KELAS XI DI MAN PAKEM

PENINGKATAN PENERIMAAN DIRI MELALUI KONSELING KELOMPOK PADA SISWA KELAS XI DI MAN PAKEM Oleh Agis Setiyaningsih 06104244060 ABSTRAK Penelitian bertujuan untuk meningkatkan penerimaan diri siswa MAN Pakem kelas XI melalui konseling kelompok. Penelitian ini merupakan penelitian tindakan kelas dengan subyek 10 siswa yang duduk di kelas XI MAN Pakem. Teknik pengambilan subyek yang digunakan yaitu purposive sampling. Metode pengumpulan data menggunakan skala, observasi dan wawancara, sedangkan instrumen yang digunakan adalah skala penerimaan diri, pedoman observasi dan pedoman wawancara. Skala penerimaan diri terdiri dari 32 item dan diuji coba pada 29 siswa menghasilkan data seluruh item valid. Hasil uji validitas skala penerimaan diri pada taraf 5% menunjukkan angka = 0,367. Reliabilitas instrumen sebesar 0,903 memiliki reliabilitas tinggi. Teknik analisis data menggunakan teknik deskriptif kuantitatif. Kegiatan konseling kelompok dilakukan dengan dua siklus. Pada siklus I terdapat 1 kali tindakan dengan 4 kali pertemuan dan di setiap tindakan masingmasing siswa diminta untuk menceritakan masalah yang sedang dihadapi dan teman yang lain diminta untuk memberikan solusi. Kemudian pada siklus II terdapat 1 kali tindakan dengan 2 kali pertemuan dan disetiap tindakan masingmasing siswa diminta untuk merefleksikan setiap permainan yang telah dilaksanakan. Dari hasil pre-test dengan hasil post-test II subyek mengalami peningkatan penerimaan diri yaitu dengan hasil pre-test 71, setelah dilakukan tindakan dan post-test II meningkat menjadi 100,9. Skor 100,9 telah mencapai batas patokan minimal yang ditetapkan yaitu 89,6 sebagai skor minimal penerimaan diri kategori tinggi. Hal tersebut membuktikan bahwa konseling kelompok dapat meningkatkan penerimaan diri dengan metode diskusi, brainstorming dan permainan, sehingga siswa dapat menerima diri sepenuhnya. Siswa mampu berpikir positif terhadap diri, menerima keadaan fisik dan menjadi diri sendiri, mengakui dan menghargai bakat diri, menerima keadaan ekonomi keluarga, merasa nyaman dan puas dengan diri. Kata kunci: penerimaan diri, konseling kelompok

Jacques Derrida and Michel Deguy. Writing and Otherness

El poeta que Deguy siempre ha querido ser, por el que ha empeñado su escritura y su vida, es el que afronta la tarea imposible de explicar la lengua a sí misma, de hacer que la lengua reflexione sobre sí misma por medio de la expresión poética. Ésta indica los límites, pero al mismo tiempo, apunta las posibilidades de trascender las formas comunes de expresión y pensamiento. Por su parte, Derrida ha mostrado la conexión interna que, en este punto, existe entre filosofía y poesía. En el presente trabajo intento comentar en detalle las conexiones que existen entre Derrida y Deguy, valiéndome en gran medida de materiales que se encuentran en sus respectivos archivos, conservados en el IMEC (Caen, Francia).The poet who has always loved be Deguy, for which he pledged his writing and his life, is facing the impossible task of explaining the language itself, to make the language to reflect on itself, through the expression poetics. This indicates the limits, but at the same time points beyond the possibilities of the common forms of expression and thought. For his part, Derrida has shown the internal connection at this point, between philosophy and poetry. In this work I attempt to comment in detail the connections between Derrida and Deguy, to borrow heavily on materials found in their archives, preserved at IMEC (Caen, France)

Peranan Kepolisian dalam Penyidikan Penyalahgunaan Informasi dan Transaksi Elektronika (Ite)

[Full Paper] to pdf Copyright (c) 2017 Meraja journal   lisensi CC B

Konsekuensi Hukum Bagi Indonesia Tentang Pengendalian Pencemaran Asap Lintas Batas Pasca Ratifikasi ASEAN Agreement on Transboundary Haze Pollution

Jurnal ini bertujuan untuk menganalisis konsekuensi hukum bagi Indonesia tentang pengendalian kabut asap pasca ratifikasi ASEAN Agreement on Transboundary Haze Pollution serta langkah-langkah yang harus dilakukan sebagai wujud asas itikad baik. Jenis penelitian yang digunakan dalam tulisan ini adalah penelitian hukum normatif dengan menggunakan pendekatan aturan hukum tertulis (statute approach). Hasil penelitian yang diperoleh yaitu Indonesia wajib mengambil tindakan di bidang legislatif, administratif serta tindakan teknis lain untuk mencegah kebakaran lahan dan hutannya supaya tidak menimbulkan pencemaran asap wilayah negara lain serta sebagai perwujudan asas itikad baik, Indonesia wajib mengambil langkah prioritas berupa penegakan hukum terhadap pelaku pembakar lahan dan hutan yang menyebabkan kabut asap.This journal aims to analyze the legal consequences for Indonesia on preventing and monitoring transboundary haze pollution after the ratification of ASEAN Agreement on Transboundary Haze Pollution and actions that should be taken by the Republic of Indonesia as a form of principle of good faith. This study is a normative legal research by using regulation of written law approach (statute approach). The result of this journal showed that Indonesia shall take legislative, administrative and other steps, as aprinciple of good faith, to prevent, control and mitigate land and forest fires that leads to trans boundary haze pollution. Indonesia also shall enforce the law as a main priority against the person or corporation that burns land and forest

Humanism, posthumanism and human identity

El posthumanismo aparece amparado en la pretensión de mejorar indefinidamente las capacidades humanas, mediante el recurso a los más innovadores recursos tecnocientíficos, desde la ingeniería genética a la inteligencia artificial, pasando por la nanotecnología y la nanorobótica. Su visión optimista del uso de tales avances científicos y tecnológicos, le permite generar una ideología de progreso indefinido aplicada a la realidad humana. Los planteamientos posthumanistas introducen elementos en la definición de la identidad humana que conllevan una transformación profunda de la misma. En primer término, por la consiguiente inaceptación de las limitaciones humanas que dichos planteamientos conllevan. En el plano intelectual, el del rendimiento físico y el de la definición sexual, las transformaciones que el posthumanismo propone conllevarían que los elementos en que basamos la definición de la identidad humana, que siempre aparecen referidos a limitaciones específicas, dejarían de tener sentido. Sin embargo, en contra de lo que pueda a primera vista parecer, esa desaparición o difuminado de los límites no conduciría a una definición ni a una vivencia más satisfactorias de la identidad personal. Las promesas posthumanistas ponen de manifiesto la oscuridad que tantas veces acompaña a la aparente luminosidad. Por lo demás, todo ello plantea numerosos retos en los ámbitos de la equidad y la justicia.Posthumanism appears protected in the pretension to improve indefinitely human capacities, through the use of the most innovative techno-scientific resources, from genetic engineering to artificial intelligence, passing through nanotechnology and nanorobotics. His optimistic vision of the use of such scientific and technological advances, allows to generate an ideology of indefinite progress applied to human reality. Posthumanist approaches introduce elements in the definition of human identity that entail a profound transformation of it. In the first place, due to the consequent unacceptance of the human limitations that they entail. In the intellectual, the physical and the sexual, the transformations that posthumanism proposes would entail that the elements on which we base the definition of human identity, which always appear to refer to specific limitations, would have no meaning. However, contrary to what it may seem at first sight, the disappearance or blurring of the limits would not lead to a more satisfactory definition or experience of personal identity. The posthumanist promises reveal the darkness that often accompanies the to the apparent luminosity. For the rest, all this poses numerous challenges in the areas of equity and justice

Populism, revolution and freedom

El objetivo de este trabajo es analizar diferentes aspectos relevantes a propósito de la comprensión de la sociedad y de la transformación revolucionaria de la misma, en el más coherente sentido de la expresión que, para mí, no es otro que la realización de la libertad. Se analiza asimismo cómo el proyecto ilustrado conlleva la búsqueda de recursos para la materialización de su compromiso subyacente con la racionalidad, la ética y la justicia. Se subraya, a ese respecto, que la lectura convencional de tal proceso deja de lado tendencias de una sorpendente actualidad. Por último, se toman en consideración los tres aspectos que, en nuestra época, inciden de forma directa sobre cualquier intento de pensar la transformación radical de una sociedad. Éstos son, a mi juicio, la disolución de la idea de responsabilidad del intelectual, la fetichización del conocimiento y el ocultamiento de la dimensión histórica de toda configuración social. El objetivo final de todo ello es ofrecer un soporte teórico adecuado para pensar de nuevo la idea de la realización efectiva de la libertad.The objective of this paper is to analyze different relevant aspects regarding the understanding of society and the revolutionary transformation of society, in the most coherent sense of that expression. For me, is no other than the realization of freedom. It is also analyzed how the enlightened project entails the search of resources for the materialization of its underlying commitment with rationality, ethics and justice. It is emphasized, in this regard, that the conventional reading of such a process leaves aside trends of a surprising actuality. Finally, the three aspects that, in our time, directly affect any attempt to think about the radical transformation of a society are taken into consideration. hese are the dissolution of the idea of responsibility of the intellectual, the fetishization of knowledge and the concealment of the historical dimension of all social configuration. The final goal of all this is to offer a suitable theoretical support to think again the idea of the effective realization of freedom

Damage diagnosis for offshore fixed wind turbines

This paper proposes a damage diagnosis strategy to detect and classify different type of damages in a laboratory offshore-fixed wind turbine model. The proposed method combines an accelerometer sensor network attached to the structure with a conceived algorithm based on principal component analysis (PCA) with quadratic discriminant analysis (QDA). The paradigm of structural health monitoring can be undertaken as a pattern recognition problem (comparison between the data collected from the healthy structure and the current structure to diagnose given a known excitation). However, in this work, as the strategy is designed for wind turbines, only the output data from the sensors is used but the excitation is assumed unknown (as in reality is provided by the wind). The proposed methodology is tested in an experimental laboratory tower modeling an offshore-fixed jacked-type wind turbine. The obtained results show the reliability of the proposed approach.Peer ReviewedPostprint (published version